JP6447987B2 - Image processing apparatus, image processing apparatus control method, and program - Google Patents

Description

  The present invention relates to an image processing apparatus, a control method for the image processing apparatus, and a program.

In recent video production sites, file-based photography has been performed. File-based imaging is an imaging method that stores uncompressed image data such as RAW data or Log data as captured image data. In recent years, file-based shooting has been performed not only for still image shooting but also for moving image shooting.
The advantage of file-based shooting is that if you adjust only the focus and exposure during shooting, you can adjust the color later.
For this reason, a division of labor system has been established in which the director of photography only sends requests for color adjustment to post-production, and allows post-production to make detailed color adjustments.

ASC (American Society of Cinemagraphers) -CDL (Color Decision List) is widely used as a means for conveying a request for color adjustment to post-production.
In CDL adjustment (color adjustment using ASC-CDL), a gamma value and a color are adjusted using parameters (image processing parameters) such as POWER, SATURATION, OFFSET, and SLOPE. In the CDL adjustment, the value of the parameter is adjusted.
Hereinafter, the value of each parameter is referred to as an adjustment value. An adjustment value set in a device such as a display device is referred to as a set value.

It is necessary to inform the post production of the color adjustment request for the captured image data. Therefore, the adjustment value needs to be managed in association with the image data.
In general, image data and adjustment values are generated separately. The correspondence between the adjustment value and the image data is managed by the user.
Further, since the color adjustment request may change depending on the shooting scene, it is necessary to change the adjustment value according to the scene.

As conventional techniques related to the handling of adjustment values, there are techniques disclosed in Patent Documents 1 and 2.
In the technique disclosed in Patent Document 1, when the operation mode is switched from the adjustment mode to the auto mode, the parameter setting values are reset.
In the technique disclosed in Patent Document 2, an adjustment value corresponding to a work purpose is selected from a plurality of adjustment values (a plurality of adjustment values having the same parameters).

JP 2011-223296 A JP 2012-189790 A

Conventionally, when generating a CDL (adjustment value) for transmitting a color adjustment request for photographed image data, the CDL adjustment is performed while displaying the image data on a VF (View Finder) of the photographing camera. In addition to the image data, the CDL is passed to the post-production as a file.
However, there is a problem that the screen size of the VF is small and CDL adjustment is difficult.
Therefore, a large display device capable of performing CDL adjustment has been developed.

As one of the usage methods assumed in such a display device having a CDL adjustment function, there is a usage method in which a plurality of image data is switched and displayed.
However, when the display device is used in such a usage method, inappropriate image processing (color adjustment) may be performed.

As an example, consider a case where a monitor terminal of a camera is connected to the input terminal 1 of the display device and an output terminal of the recording device is connected to the input terminal 2 of the display device. When the input terminal 1 is selected, image data (photographed image data) output from the camera is displayed on the display device. When the input terminal 2 is selected, the image data output from the recording device is displayed on the display device.
When the CDL adjustment is performed with the input terminal 1 selected, the parameter setting values after the CDL adjustment are recorded.
Thereafter, the image data to be displayed may be switched to the image data input to the input terminal 2 in a state where an adjustment value corresponding to the image data input to the input terminal 1 is set in the display device. In that case, the CDL adjustment (inappropriate CDL adjustment) using the adjustment value corresponding to the image data input to the input terminal 1 is performed on the image data input to the input terminal 2.

Further, as one of usage methods assumed in a display device having a CDL adjustment function, there are the following usage methods. That is, there is a usage method in which image data after CDL adjustment is output to an external device as image data for post-production, and the image data that is the work result in post-production is displayed for confirmation. In this usage method, for example, image data after CDL adjustment is used as editing image data, reference image data, and the like in a recording work performed by post-production.
Even when the display device is used in such a usage method, inappropriate image processing (color adjustment) may be performed.

  Specifically, the image data to be displayed may be switched to the image data that is the work result in the post production in a state where the adjustment value corresponding to the captured image data is set in the display device. In such a case, inappropriate CDL adjustment is performed on the work result, and image data that has been subjected to double CDL adjustment is displayed.

In the techniques disclosed in Patent Documents 1 and 2, the adjustment value can be switched according to the work purpose and the operation mode, but the adjustment value cannot be automatically changed so as to solve the above-described problem.
And in order to solve the said subject using a prior art, the user must perform reset operation which resets the setting value of an image processing parameter manually, and a user's load increases.

  An object of this invention is to provide the technique which can suppress that an inappropriate image process is performed to image data.

The first aspect of the present invention is:
Acquisition means for acquiring image data output from an external device;
Setting means for setting values of image processing parameters relating to predetermined image processing;
Image processing means for performing the predetermined image processing on the image data acquired by the acquisition means using the set value of the image processing parameter set by the setting means;
Determining means for determining whether or not an external device that is an output source of image data to be processed has been changed;
Output means for outputting image data subjected to the predetermined image processing by the image processing means to a display panel;
Have
In response to determining that the external device that is the output source of the image data to be processed is changed by the determining unit, the setting unit resets the setting value of the image processing parameter to an initial value, and the setting An image processing apparatus characterized in that image data subjected to the predetermined image processing using the set value of the image processing parameter set to an initial value by the means is output to the display panel by the output means. is there.
The second aspect of the present invention is:
Acquisition means for acquiring image data output from an external device;
Setting means for setting values of image processing parameters relating to predetermined image processing;
Image processing means for performing the predetermined image processing on the image data acquired by the acquisition means using the set value of the image processing parameter set by the setting means;
Output means for outputting image data subjected to the predetermined image processing by the image processing means to a display panel;
Have
The setting means, when the power of the images processing apparatus is turned off by the user, an image processing apparatus characterized by resetting the set value of the image processing parameter to an initial value.

The third aspect of the present invention is:
An acquisition step of acquiring image data output from an external device;
A setting step for setting values of image processing parameters relating to predetermined image processing;
An image processing step of applying the predetermined image processing to the image data acquired in the acquisition step using the setting value of the image processing parameter set in the setting step;
A determination step of determining whether or not an external device that is an output source of image data to be processed is changed;
An output step of outputting the image data subjected to the predetermined image processing in the image processing step to a display panel;
Have
In response to determining that the external device that is the output source of the image data to be processed is changed in the determination step, the setting step resets the setting value of the image processing parameter to an initial value, and An image processing apparatus characterized in that the image data subjected to the predetermined image processing using the set value of the image processing parameter set to the initial value in the setting step is output to the display panel in the output step. This is a control method.
The fourth aspect of the present invention is:
An acquisition step of acquiring image data output from an external device;
A setting step for setting values of image processing parameters relating to predetermined image processing;
An image processing step of applying the predetermined image processing to the image data acquired in the acquisition step using the setting value of the image processing parameter set in the setting step ;
And outputting the image data to the predetermined image processing is performed by the pre-Symbol image processing steps in the display panel,
Have
It said setting step, when the power of the images processing apparatus is turned off by the user, a control method for an image processing apparatus characterized by resetting the set value of the image processing parameter to an initial value.

A fifth aspect of the present invention is a program that causes a computer to function as each unit of the above-described image processing apparatus .

  According to the present invention, it is possible to suppress inappropriate image processing from being performed on image data.

1 is a diagram illustrating an example of a display device and an external device according to a first embodiment. 1 is a block diagram illustrating an example of a configuration of a display device according to a first embodiment. FIG. 3 is a diagram illustrating an example of an operation unit according to the first embodiment. The figure which shows an example of the OSD image which concerns on Example 1. FIG. FIG. 10 is a diagram illustrating an example of the operation of the display device according to the first embodiment. FIG. 10 is a diagram illustrating an example of a display device and an external device according to the second embodiment. FIG. 10 is a diagram illustrating an example of a display device and an external device according to the second embodiment. FIG. 6 is a block diagram illustrating an example of a configuration of a display device according to a second embodiment. 10 is a flowchart illustrating an example of the operation of the display device according to the second embodiment. The figure which shows an example of the structure of the SDI signal before the image processing which concerns on Example 2. FIG. The figure which shows an example of the structure of the SDI signal after the image processing which concerns on Example 2. FIG. The figure which shows an example of the structure of the SDI signal after the image processing which concerns on Example 2. FIG. The enlarged view of the input terminal part of the display apparatus which concerns on Example 3. FIG. 10 is a flowchart illustrating an example of the operation of the display device according to the third embodiment. The figure which shows an example of the structure of the SDI signal which concerns on Example 4. FIG. The figure which shows an example of the time change of the time code which concerns on Example 4. FIG. The figure which shows an example of the SDI signal containing the camera information which concerns on Example 5. FIG.

<Example 1>
An image processing apparatus and a control method thereof according to Embodiment 1 of the present invention will be described.
In the following, an example in which the image processing apparatus according to the present embodiment is a display device will be described. However, the image processing apparatus according to the present embodiment is not limited to a display device. The image processing apparatus according to the present embodiment may be any apparatus as long as it performs image processing on image data. For example, the image processing apparatus according to the present embodiment may be an apparatus that performs only image processing, may be incorporated in a photographing apparatus that captures image data, or may be a recording apparatus that records image data. It may be built in.

FIG. 1 is a diagram illustrating an example of the display device 102 and its external device according to the present embodiment.
In the example of FIG. 1, the display device 102 is connected to a camera 101 and a recording device 103.
The external device is not limited to the camera 101 and the recording device 103. For example, an editing device used in image data editing work may be connected to the display device 102.

  The camera 101 is a photographing device that captures image data. The camera 101 has an output terminal and can output photographed image data to the outside from the output terminal. In the example of FIG. 1, the output terminal of the camera 101 is connected to the first input terminal 104 of the display device 102, and image data (captured image data) output from the output terminal of the camera 101 is displayed on the display device 102. To the first input terminal 104.

  The recording device 103 is a device that records image data. For example, the recording apparatus 103 performs image processing on the image data input to the recording apparatus 103 as necessary, and records the image data in a storage medium such as an HDD (Hard Disk Drive) or an SSD (Solid State Drive). The recording apparatus 103 has an input terminal and an output terminal, and records image data (image data subjected to image processing as necessary) input from the outside to the input terminal on the recording medium. The recorded image data can be output to the outside from the output terminal. In the example of FIG. 1, the output terminal 106 of the display device 102 is connected to the input terminal of the recording device 103, and the image data output from the output terminal 106 of the display device 102 is input to the input terminal of the recording device 103. The The output terminal of the recording apparatus 103 is connected to the second input terminal 105 of the display apparatus 102, and the image data output from the output terminal of the recording apparatus 103 is input to the second input terminal 105 of the display apparatus 102. The

The display device 102 selects one of the first input terminal 104 and the second input terminal 105, and displays the image data input to the selected input terminal. That is, the display device 102 switches between the image data input to the first input terminal 104 and the image data input to the second input terminal 105 for display.
In this embodiment, an example in which the number of input terminals of the display device 102 is two will be described. However, the number of input terminals may be more than two. For example, the display device 102 may have five input terminals. The display device 102 may display the image data input to any one of the five input terminals.

  FIG. 2 is a block diagram illustrating an example of the configuration of the display device 102.

  The first input terminal 104 and the second input terminal 105 are terminals to which image data output from an external device is input. In other words, the first input terminal 104 and the second input terminal 105 acquire image data output from an external device. The first input terminal 104 and the second input terminal 105 are, for example, SDI (Serial Digital Interface) input terminals, and a BNC connector is used as a connector.

The selector 201 selects any one of a plurality of input terminals included in the display device 102. Specifically, the selector 201 selects one of the first input terminal 104 and the second input terminal 105. Then, the selector 201 outputs the image data acquired at the selected input terminal to the receiver.

  The receiver 202 decodes the image data (SDI signal) output from the selector 201. Then, the receiver 202 outputs the decoded image data.

  The image processing unit 203 performs image processing using image processing parameter setting values on the image data acquired at the input terminal. In the present embodiment, image processing is performed on image data (specifically, image data decoded by the receiver 202) acquired at the input terminal selected by the selector 201. Then, the image processing unit 203 outputs image data that has been subjected to image processing. Image processing includes color adjustment processing, resolution conversion processing, and the like. The image processing parameters include a 3D-LUT (3 Dimension-Look up Table) for adjusting a gamma curve, a CDL parameter for adjusting the color of image data, and the like. CDL parameters include POWER, SATURATION, OFFSET, and SLOPE.

The OSD control unit 204 generates an OSD (On Screen Display) image. The OSD control unit 204 combines the image data output from the image processing unit 203 and the OSD image data, and generates combined image data on which the OSD image is superimposed. Then, the OSD control unit 204 outputs the composite image data.
Note that the process of superimposing the OSD image may be performed as necessary, and the image data output from the image processing unit 203 may be output from the OSD control unit 204.

  The LCD control unit 205 converts the image data output from the OSD control unit 204 into image data corresponding to display on an LCD (Liquid Crystal Display) 207. Then, the LCD control unit 205 outputs the image data that has been subjected to the conversion process.

  The LCD drive unit 206 is a driver that drives the LCD 207 in accordance with the image data output from the LCD control unit 205.

The LCD 207 is a display panel that displays the image data output from the LCD control unit 205. Specifically, the LCD 207 is a liquid crystal panel having a plurality of liquid crystal elements. Then, the image data output from the LCD control unit 205 is displayed by controlling the transmittance of each liquid crystal element by the LCD driving unit 206.
The display panel is not limited to a liquid crystal panel. The display panel may be an organic EL panel or a plasma panel.

  The operation unit 208 is a user interface that accepts user operations on the display device 102. The operation unit 208 is, for example, a remote controller of the display device 102, a button provided on the display device 102, or the like. When a user operation is performed, the operation unit 208 outputs an operation signal indicating the user operation.

The CPU 209 controls each functional unit included in the display device 102. In this embodiment, the CPU 209 sets the value of the image processing parameter. Also, the CPU 209 determines whether or not the external device that is the output source of the target image data has been changed. The target image data is image data to be processed by the image processing unit 203.
Note that the functional unit that sets the value of the image processing parameter and the functional unit that determines whether or not the external device has been changed may be different functional units.

  The memory 210 is a storage unit that stores setting values of each parameter.

  The equalizer 211 is a compensation circuit that adjusts the frequency characteristics of the image data when the image data input to the display device 102 (image data output from the selector 201) is output to the outside.

  The output terminal 106 is a terminal that outputs the image data output from the equalizer 211 to the outside. The output terminal 106 is, for example, an output terminal of SDI (Serial Digital Interface), and a BNC connector is used as a connector.

  Note that the image processing apparatus may not include all of the plurality of functional units described above. For example, when the image processing device and the display device are separate devices, the LCD control unit 205, the LCD driving unit 206, the LCD 207, and the like are not provided in the image processing device, but are provided in the display device. Also good. When the image processing device and the display device are separate devices, the image processing device may include a display unit that displays image data subjected to image processing on the display device.

The operation of the display device 102 when outputting image data to the recording device 103 while adjusting the set value of the CDL parameter will be described below.
First, the first input terminal 104 is selected by the selector 201 in order to display the image data output from the camera 101.
Image data output from the camera 101 is decoded by the receiver 202. The image data output from the camera 101 is input to the output terminal 106 via the equalizer 211 and output from the output terminal 106.
The image data output from the output terminal 106 is input to the recording device 103.
The image data decoded by the receiver 202 is sent to the image processing unit 203 and subjected to image processing. At this time, the CPU 209 sets an image processing parameter value or adjusts an image processing parameter setting value. In this embodiment, the value of the image processing parameter is set according to the user operation. Specifically, when the user operates the operation unit 208, a setting instruction for setting the value of the image processing parameter is input to the display device 102. Then, the CPU 209 sets the value of the image processing parameter according to the setting instruction.

FIG. 3 is a diagram illustrating an example of the operation unit 208.
The first dial 301 is a dial for adjusting the set value of POWER.
The second dial 302 is a dial for adjusting the setting value of SATURATION.
The third dial 303 is a dial for adjusting the set value of OFFSET.
The fourth dial 304 is a dial for adjusting the set value of SLOPE.
When the dial (dials 301 to 304) is turned clockwise, the parameter setting value increases, and when the dial is turned counterclockwise, the parameter setting value decreases.
The selection operation key 306 includes an up key, a down key, a left key, a right key, and a center key (decision key). The selection operation key 306 is used for performing various operations on the OSD image, for example.
The power key 307 is a button for turning on / off the power of the display device 102 main body.
The switch 305 is an input changeover switch. Each time the switch 305 is pressed, the input terminal selected by the selector 201 is switched between the first input terminal 104 and the second input terminal 105.

FIG. 4 is a diagram illustrating an example of an OSD image displayed on the display device 102 when the set value of the CDL parameter is adjusted. FIG. 4 shows an example of an OSD image displayed when adjusting the set value of POWER. The OSD image in FIG. 4 is displayed in response to a user operation of turning the first dial 301, for example.
The parameter name 401 is an OSD image that indicates the type of parameter being adjusted by characters.
The parameter bar 402 is an OSD image that graphically shows an adjustable range of parameter setting values.
The indicator 403 is an OSD image that graphically shows parameter setting values. The indicator 403 is displayed at a corresponding position on the parameter bar 402 (set value adjustable range). The corresponding position is a position corresponding to the parameter setting value. The parameter setting value is indicated by the display position of the indicator 403.
The parameter value 404 is an OSD image that indicates a parameter setting value as a numerical value.
A similar OSD image is also displayed when setting values of other parameters are adjusted.

  The operation of the display device 102 when adjusting the set value of the CDL parameter will be described in more detail. FIG. 5A is a sequence diagram illustrating an example of the operation of the display device 102 when adjusting the set value of the CDL parameter, and FIG. 5B is a flowchart illustrating an example of such an operation. The vertical axis in FIG. 5A represents the passage of time, and the direction from top to bottom is the passage of time.

First, when the user operates the operation unit 208 (S501), an operation signal C501 is sent from the operation unit 208 to the CPU 209. For example, when the first dial 301 is moved two units clockwise, operation information “POWER +2” is sent to the CPU 209. When the first dial 301 is moved two units counterclockwise, operation information “POWER-2” is sent to the CPU 209.
Next, the CPU 209 determines from the operation signal C501 whether or not the dial is turned clockwise (S502). If the dial is turned clockwise, the process proceeds to S503. If the dial is turned counterclockwise, the process proceeds to S507.

In step S <b> 503, the CPU 209 accesses the memory 210 and reads the parameter setting values stored in the memory 210. Specifically, the setting value of the parameter corresponding to the dial turned in S501 is read. When the first dial 301 is turned in S501, the set value of POWER is read out. Then, the CPU 209 adds a value corresponding to the dial operation to the read setting value. For example, when operation information “POWER +2” is sent to the CPU 209, 2 is added to the set value of POWER.
Next, the CPU 209 determines whether or not the addition result of S503 exceeds the upper limit value of the parameter (S504). For example, if 2 is added to the POWER setting value in S503, it is determined whether or not the value obtained by adding 2 to the POWER setting value exceeds the upper limit value of POWER. If the addition result of S503 exceeds the upper limit value of the parameter, the process proceeds to S505. If the addition result of S503 is equal to or less than the upper limit value of the parameter, the process proceeds to S506.
In S505, the CPU 209 updates the parameter setting value corresponding to the dial turned in S501 to the upper limit value of the parameter. Thereafter, the process proceeds to S510.
In step S506, the CPU 209 updates the parameter setting value corresponding to the dial turned in step S501 to the addition result in step S503. Thereafter, the process proceeds to S510.

In step S <b> 507, the CPU 209 accesses the memory 210 and reads the parameter setting values stored in the memory 210. Then, the CPU 209 subtracts a value corresponding to the dial operation from the read setting value.
Next, the CPU 209 determines whether or not the subtraction result in S507 is below the lower limit value of the parameter (S508). If the subtraction result in S507 is below the lower limit value of the parameter, the process proceeds to S509. If the subtraction result in S507 is equal to or greater than the lower limit value of the parameter, the process proceeds to S506.
In S509, the CPU 209 updates the parameter setting value corresponding to the dial turned in S501 to the lower limit value of the parameter. Thereafter, the process proceeds to S510.
In step S506, the CPU 209 updates the parameter setting value corresponding to the dial turned in step S501 to the subtraction result in step S507. Thereafter, the process proceeds to S510.

  In step S <b> 510, the CPU 209 sends an instruction signal C <b> 502 for updating a setting value used for image processing to the image processing unit 203. Thereby, the setting value used in the image processing unit 203 is updated. In addition, the CPU 209 stores the updated setting value in the memory 210. Thereby, the setting value stored in the memory 210 is updated. Further, the CPU 209 outputs an instruction signal for updating the OSD image to the OSD control unit 204. Thereby, the display of the OSD image shown in FIG. 4 (specifically, the display position of the indicator 403 and the numerical value displayed as the parameter value 404) is updated. As an instruction signal output to the image processing unit 203 or the OSD control unit 204, for example, a signal indicating a set value after update can be used. The instruction signal output to the image processing unit 203 and the instruction signal output to the OSD control unit 204 may be the same signal or different signals.

  The image processing unit 203 first reads the set value written in the memory 210 and performs image processing using the read set value. Thereafter, the adjustment value to be used is updated in accordance with the instruction signal C502 from the CPU 209. Thereby, the image data input to the first input terminal 104 is subjected to image processing using the adjusted set value and displayed.

Next, the operation of the display device 102 when the recording by the recording device 103 is completed and the recorded image data is reproduced and confirmed will be described.
The user performs a user operation for reproducing the recorded image data on the recording apparatus 103. As a result, reproduction processing is performed by the recording apparatus 103. The recorded image data (image data recorded on the recording medium) is output from the recording device 103 and input to the display device 102. In addition, the user performs an input switching operation of pressing the switch 305 of the display device 102. Thereby, the second input terminal 105 is selected and displayed by the selector 201.

  At this time, an adjustment value for image data output from an external device different from the recording device 103 may be set in the display device 102. Specifically, an adjustment value for image data output from the camera 101 may be set in the display device 102. An adjustment value for image data output from a certain external device is a value that should be used only in image processing for image data output from the external device, and image processing for image data output from another external device. Should not be used. Image processing using an adjustment value for image data output from a certain external device is inappropriate for image data output from another external device.

Therefore, in this embodiment, the CPU 209 determines whether or not the external apparatus that is the output source of the target image data has been changed. If the CPU 209 determines that the external device that is the output source of the target image data has been changed, the CPU 209 resets the setting value of the image processing parameter to the initial value. In this embodiment, when the input terminal selected by the selector 201 is changed, the CPU 209 determines that the external device that is the output source of the target image data has been changed. Specifically, when the CPU 209 receives an input switching signal (a signal indicating that the input switching operation has been performed) from the operation unit 208, the CPU 209 determines that the external device that is the output source of the target image data has been changed. . The input switching signal is an operation signal indicating that an input switching operation has been performed, and is an operation signal output from the operation unit 208 when an input switching operation has been performed.
However, only the setting values of the parameters (CDL parameters) described in the CDL file are reset to the initial values here. The setting value of the 3D-LUT for adjusting the gamma curve of the entire image, the setting value of the image quality mode (SHARPNESS, BRIGHTNES, etc.) set for each input terminal are not reset to the initial values.
When it is determined that the external device that is the output source of the target image data has not been changed, the image processing parameter setting value is not reset to the initial value, and image processing is performed.

After resetting the setting value of the image processing parameter to the initial value, the CPU 209 outputs an input switching instruction to the selector 201.
The selector 201 switches the input terminal to be selected from the first input terminal 104 to the second input terminal 105 in response to the input switching instruction.
Thereby, it is possible to display the image data output from the recording device 103 without performing inappropriate image processing. Specifically, the image data output from the recording device 103 can be displayed after being subjected to image processing using initial values of image processing parameters.

  As described above, according to the present embodiment, it is determined whether or not the external device that is the output source of the target image data (image data to be processed) has been changed. When it is determined that the external device that is the output source of the target image data has been changed, the setting value of the image processing parameter is automatically reset to the initial value. Thereby, it is possible to prevent the image data from being inappropriately processed. In addition, it is possible to save the user from having to reset the set value.

  A receiver, an equalizer, and an output terminal may be provided for each input terminal. And the selector 201 may be provided in the back | latter stage of the some receiver corresponding to a some input terminal. With such a configuration, it is possible to prevent image data output from the image processing apparatus from being influenced by selection by the selector 201. Specifically, image data input to an input terminal other than the input terminal selected by the selector 201 can also be output to the outside.

  In this embodiment, an example in which image data before image processing is output to the outside has been described. However, image data after image processing may be output to the outside. Image data before image processing and adjustment values for the image data may be output to the outside. With such a configuration, a user who performs a subsequent work (for example, a recording work) of the image processing work using the image processing apparatus, the image processing was performed in the image processing work, and the image processing work was performed. It can convey the intention of image processing.

  Note that when the image processing apparatus is turned off, the setting value of the image processing parameter may be reset to the initial value. Specifically, when the user operates the power key 307 of the operation unit 208 to turn off the display device 102, the setting value of the image processing parameter may be reset to the initial value. When the image processing apparatus is turned off and then turned on again, there is a high possibility that the external apparatus that is the output source of the target image data has changed from before the image processing apparatus was turned off. Therefore, it is preferable to reset the setting value of the image processing parameter to the initial value when the power of the image processing apparatus is turned off.

  Further, when the calibration of the display device is executed, the set value of the image processing parameter may be reset to the initial value. Specifically, when the user operates the selection operation key 306 of the operation unit 208 and performs an operation of starting calibration of luminance, gamma, color temperature, color gamut, and the like from the menu image (OSD image), The set value of the image processing parameter may be reset to the initial value. When calibration is performed, the setting values of parameters other than the parameters to be reset (CDL parameters) change. Therefore, it is preferable to reset the setting values of the CDL parameters when performing calibration.

Note that the initial value of the image processing parameter may be any value. For example, the initial value of the image processing parameter may or may not be a value at which the value of the image data does not change before and after the image processing. If the initial value is a value that does not change the value of the image data before and after image processing, changes in color and brightness due to image processing can be suppressed, and input image data can be accurately displayed and confirmed. it can.

  In this embodiment, an example in which the image processing parameter to be reset is a CDL parameter has been described, but image processing parameters other than the CDL parameter may be reset. As long as the image processing parameter is set to a value to be used for specific image data, any set value of the image processing parameter may be reset.

  In this embodiment, the example in which the adjustment value is set according to the user operation has been described. However, the adjustment value setting method is not limited to this. For example, data (file) indicating an adjustment value may be acquired from the outside, and the adjustment value indicated by the data may be set.

<Example 2>
In the second embodiment, a configuration capable of detecting a change in an external apparatus that is an output source of image data input to one input terminal will be described.

  6 and 7 are diagrams illustrating examples of the display device 602 according to the present embodiment and its external devices. The same devices as those in FIG. 1 are denoted by the same reference numerals, and description thereof is omitted. 6 and 7 are different in the connection method between the apparatuses.

  The IF-BOX 601 is an interface box that relays between the camera 101 and the display device 602. The camera 101 has an SDI terminal as an output terminal. When data of a 4K image (an image having a resolution of about 4000 pixels in the horizontal direction × 2000 pixels in the vertical direction) is output from the camera 101, the data of the 4K image is transmitted using four 3G-SDI cables. In this embodiment, the camera 101 outputs RAW data or Log data. The IF-BOX 601 has a function of converting RAW data or Log data output from the camera 101 into image data that can be displayed on the display device 602. The IF-BOX 601 stores a LUT (Look Up Table) in advance, and conversion to image data that can be displayed on the display device 602 is performed using the LUT.

FIG. 6 illustrates a connection state when image processing is performed on image data captured by the camera 101, and image data captured by the camera 101 or image data that has been subjected to image processing is input to the recording apparatus 103. Represents.
In the example of FIG. 6, the output terminal of the camera 101 is connected to the input terminal of the IF-BOX 601, and RAW data or Log data output from the output terminal of the camera 101 is input to the input terminal of the IF-BOX 601. . Then, the RAW data or Log data output from the camera 101 is converted into image data that can be displayed on the display device 602 by the IF-BOX 601.
In the example of FIG. 6, the output terminal of the IF-BOX 601 is connected to the input terminal 604 of the display device 602, and image data output from the output terminal of the IF-BOX 601 (image data generated by the conversion). Is input to the input terminal 604. Then, the display device 602 displays the image data input to the input terminal 604 after image processing.
In the example of FIG. 6, the output terminal 606 of the display device 602 is connected to the input terminal of the recording device 103, and image data output from the output terminal 606 of the display device 602 is input to the input terminal of the recording device 103. Entered.

FIG. 7 shows a connection state when image data recorded by the recording device 103 is reproduced and confirmed by the display device 602.
In the example of FIG. 7, the output terminal of the recording device 103 is connected to the input terminal 604 of the display device 602, and image data (recorded image data) output from the output terminal of the recording device 103 is input terminal 604. Is input. Then, the display device 602 displays the image data input to the input terminal 604 after image processing. Although details will be described later, also in this embodiment, when the external device that is the output source of the image data to be processed (target image data) is switched, the setting value of the image processing parameter is reset to the initial value. . Therefore, when the recorded image data is confirmed on the display device 602, image processing using the initial value of the image processing parameter is performed, and inappropriate image processing is not performed.
In this embodiment as well, when the external device that is the output source of the target image data has not been changed, the image processing is performed without resetting the setting value of the image processing parameter to the initial value.

FIG. 8 is a block diagram illustrating an example of the configuration of the display device 602.
The same reference numerals are given to the same functional units as those in FIG. 2, and the description thereof is omitted.
An input terminal 604 is a terminal to which image data output from an external device is input. In other words, the input terminal 604 acquires image data output from an external device. The image data acquired at the input terminal 604 is output to the receiver 202 and the equalizer 211.
The transmitter 801 converts the image data output from the image processing unit 203 (image data subjected to image processing) into output image data (for example, an SDI signal), and outputs the image data.
The selector 802 selects one of the image data output from the transmitter 801 and the image data output from the equalizer 211 and outputs the selected image data to the output terminal 606.
The output terminal 606 is a terminal for outputting the image data output from the selector 802 to the outside.

  FIG. 9 is a flowchart illustrating an example of the operation of the display device 602. At the start of the flowchart of FIG. 9, the connection state is the state of FIG. In the connection state of FIG. 6, image processing is performed on image data captured by the camera 101. In addition, processing for outputting the image data to the recording apparatus 103 is performed.

  First, the image processing unit 203 performs image processing on the image data output from the receiver 202 (S901).

  Specifically, in S901, the following processing is performed.

First, data output from the camera 101 is converted into image data by the IF-BOX 601 and input to the input terminal 604.
Next, image data (image data captured by the camera 101 and converted by the IF-BOX 601) input to the input terminal 604 is sent to the receiver 202.
Then, the receiver 202 decodes the image data output from the input terminal 604, and the decoded image data is output to the image processing unit 203.
Next, the image processing unit 203 performs image processing on the decoded image data. At this time, as in the first embodiment, the setting value used for image processing (the setting value of the image processing parameter) is adjusted by the user operating the operation unit 208.
The image data that has been subjected to image processing is subjected to various processing by the OSD control unit 204 and the LCD control unit 205 and then input to the LCD driving unit 206.
Next, when the LCD driving unit 206 drives the LCD 207, the image data subjected to the image processing is displayed on the screen.

The image data subjected to image processing by the image processing unit 203 is also sent to the transmitter 801, converted to output image data (SDI signal) by the transmitter 801, and then sent to the selector 802.
The image data input to the input terminal 604 is also sent to the equalizer 211, subjected to signal adjustment processing by the equalizer 211, and then sent to the selector 802.

The selector 802 selects one of the image data from the transmitter 801 and the image data from the equalizer 211 and outputs the selected image data to the output terminal 606. The output terminal 606 outputs the image data output from the selector 802 to the outside (recording apparatus 103).
A selector 802 selects image data in accordance with a selection signal input from the operation unit 208 via the CPU 209. The selection signal is an operation signal output from the operation unit 208 when the user operates image data output to the outside using the operation unit 208. The image data output from the transmitter 801 is image data after being subjected to image processing by the image processing unit 203, and the image data output from the equalizer 211 is before being subjected to image processing by the image processing unit 203. Image data. The user can select image data to be output to the outside according to the application.
In the present embodiment, in the initial state, the image data output from the equalizer 211 is selected, and the same image data as the image data input to the input terminal 604 is output to the outside via the output terminal 606.

  The user checks the displayed image data (image data on which image processing has been performed) while operating the operation unit 208 to adjust the setting value of the image processing parameter.

  The above is the process and operation performed in S901.

  Following S901, the CPU 209 determines whether image data from the transmitter 801 has been selected as image data to be output to the outside (S902). As described above, in this embodiment, the image data from the equalizer 211 is selected in the initial state. Therefore, in this embodiment, in S902, it is determined whether or not a user operation for switching the image data output to the outside from the output of the equalizer 211 to the output of the transmitter 801 has been performed. When image data from the transmitter 801 is selected by the selector 802, the image data subjected to image processing is output from the output terminal 606. The process of S902 is repeatedly performed until the image data from the transmitter 801 is selected. After the image data from the transmitter 801 is selected, the process proceeds to S903.

  Then, the CPU 209 stores the setting value adjusted by the user in the memory 210 (S903).

  The image data output from the output terminal 606 is used as image data for recording (image data to be recorded) in the recording apparatus 103 (for grasping the intention of image processing in the image processing unit 203). It is used as reference image data.

Next, the CPU 209 determines whether or not the external device connected to the input terminal 604 has been switched (changed) (S904). Details of the determination method of S904 will be described later.
Until it is determined that the external device has been changed, the process of S904 is repeatedly performed. After it is determined that the external device has been changed, the process proceeds to S905. In this embodiment, the connection state is the state of FIG. 6 at the start of the flowchart of FIG. Then, when the connection state is switched from the state of FIG. 6 to the state of FIG. 7, it is determined that the external device has been changed, and the process proceeds to S905. The connection state in FIG. 7 is a state in which the output terminal of the recording apparatus 103 is connected to the input terminal 604 of the display apparatus 602 in order to confirm the recorded image data.

When the connection state is switched to the state of FIG. 7, the image data output from the recording device 103 is input to the input terminal 604.
Next, the image data input to the input terminal 604 is sent to the receiver 202.
Then, the receiver 202 decodes the image data output from the input terminal 604, and the decoded image data is output to the image processing unit 203.

  In step S905, the CPU 209 resets the setting value of the image processing parameter to an initial value. By this processing, it is possible to prevent the image data output from the recording apparatus 103 from being inappropriately processed. Specifically, it is possible to prevent image processing that has been subjected to image processing from being performed again. That is, it is possible to prevent the image data from being subjected to image processing twice. Further, by automatically resetting the set value, it is possible to save the user from adjusting the set value to the initial value.

  Next, the CPU 209 determines whether or not a user operation for reading the setting value of the image processing parameter has been performed (S906). For example, the operation unit 208 is provided with a read switch, and reading the set value is instructed by operating the read switch. In addition, an OSD image that inquires the user whether or not to read the setting value may be displayed, and the reading of the setting value may be instructed by a user operation using the OSD image. Until the user operation for reading the set value is performed, the process of S906 is repeatedly performed. After the user operation for reading the set value is performed, the process proceeds to the process of S907.

In step S <b> 907, the CPU 209 reads the setting value of the image processing parameter from the memory 210 and outputs it to the image processing unit 203. As a result, the image data output from the recording apparatus 103 is subjected to image processing using the set value (initial value) of the image processing parameter and displayed.
Note that the process of S906 may be omitted, and the process of S907 may be performed after the process of S905.

  A method for determining whether or not the external device connected to the input terminal 604 has been switched will be described below.

  In this embodiment, the image processing unit 203 performs the above-described image processing and additional processing for adding additional data to an SDI signal to be processed (an SDI signal including target image data that is processing target image data). Apply.

FIG. 10 shows the structure of the SDI signal after being decoded by the receiver 202. In FIG. 10, the horizontal axis represents the number of bits, and the vertical axis represents time (one square represents one clock).
The decoded SDI signal is composed of a 20-bit signal, and is divided into 10-bit data streams. The SDI signal may be called a content data stream or an SDI data stream.
In the SDI signal, EAV, ANC, SAV, and Active Video are sequentially stored, and one set of EAV, ANC, SAV, and Active Video period corresponds to one horizontal synchronization period of image data.
EAV represents the end of Active Video, ANC represents ancillary data (auxiliary data), SAV represents the start of Active Video, and Active Video represents an effective image (target image data for one line).
EAV and SAV are discriminated by detecting a data sequence of 3FFh, 000h, 000h.

When performing image processing, the image processing unit 203 writes the additional data to the ANC of the SDI signal, thereby adding the additional data to the target image data.
FIG. 11 shows the structure of an SDI signal in which processing completion data indicating that image processing has been executed is written as additional data. A portion indicated by CDL_F (a sequence of data of 0AAh, 0AAh, 001h) is processing completion data.
Image data that has been subjected to image processing and to which additional data (processing completion data) has been added is output to the outside via a transmitter 801, a selector 802, and an output terminal 606. Specifically, an SDI signal on which image processing has been performed and additional data (processing completion data) has been written is output to the outside via a transmitter 801, a selector 802, and an output terminal 606.
If additional data has already been added to the target image data, the additional processing may be omitted or the additional data may be updated.

Further, the image processing unit 203 determines whether additional data is added to the target image data, and outputs the determination result to the CPU 209.
In the example of FIG. 11, the image processing unit 203 determines whether the ANC of the SDI signal includes a data sequence of 0AAh, 0AAh, and 001h. When the data sequence of 0AAh, 0AAh, 001h is detected from the ANC of the SDI signal, the image processing unit 203 determines that the additional data is added to the target image data. If no data sequence 0AAh, 0AAh, 001h is detected from the ANC of the SDI signal, the image processing unit 203 determines that additional data is not added to the target image data.

  If additional data is added to the target image data, the CPU 209 determines that the external device that is the output source of the target image data has been changed, and resets the setting value of the image processing parameter to the initial value.

  By the above method, it is possible to detect a change in an external device that is an output source of image data input to one input terminal.

  The additional data is not limited to the processing completion data. For example, as shown in FIG. 12, additional data other than processing completion data (portion indicated by CDL_D) may be written in the ANC. In the example of FIG. 12, processing completion data is also written in the ANC. As shown in FIG. 12, multiple types of additional data may be added to the target image data, or one type of additional data may be added to the target image data.

For example, identification data indicating the image processing device (display device 602) may be added as additional data. The identification data is a model number (model number), a serial number, and the like of the display device 602. By adding the identification data, it can be determined whether the target image data is image data that has been subjected to image processing by the display device 602.
If the identification data is used, it is possible to determine with high accuracy whether or not the image data has been subjected to image processing by the display device 602, and whether or not the external device that is the output source of the target image data has been changed is also high. It can be judged with accuracy.

In addition, parameter setting values that can be set by the image processing apparatus (display device 602) may be encoded and added as additional data. For example, the POWER setting value may be stored in the upper 5 bits of DataStream1, and the SATURATION setting value may be stored in the lower 5 bits of DataStream1. The set value of OFFSET may be stored in the upper 5 bits of DataStream2, and SLOPE may be stored in the lower 5 bits of DataStream2. By adding (storing) the set value in this way, it is possible to transmit additional data for 5 bits using four parameters. Of course, if a data area for a plurality of clocks is prepared as the data area indicated by CDL_D in FIG. 12, the bit width of the additional data can be increased.
As described above, if the setting value of the image processing parameter is added as the setting value of the parameter that can be set by the image processing device (display device 602), the adjustment value used in the image processing applied to the image data is used. It can be presented to the user.

Further, as additional data, parameter setting values other than image processing parameters (other than CDL parameters) may be encoded and added. When displaying image data, parameters other than CDL parameters are used. For example, SHARPESS for adjusting the definition of the image, BRIGHTNESS for adjusting the backlight brightness, and the like are used. The set values of these parameters may be added as additional data.
With such a configuration, when the image data subjected to the image processing is displayed again, the setting values used in the past (setting values of parameters other than the CDL parameters) are used as the image processing unit 203 or the LCD control unit. The display can be performed by reflecting in the processing in 205. That is, when image data that has been subjected to image processing is displayed again, it is possible to display using setting values that have been used in the past (setting values of parameters other than CDL parameters). As a result, the same display as the past display can be reproduced.

  As described above, according to the present embodiment, by using the additional data, it is possible to improve the detection accuracy of the change of the external device that is the output source of the target image data. Specifically, it is possible to detect a change in an external device that is an output source of image data input to one input terminal. According to this embodiment, when it is determined that the external device that is the output source of the target image data has been changed, the setting value of the image processing parameter is automatically reset to the initial value. Thereby, it is possible to prevent the image data from being inappropriately processed. In addition, it is possible to save the user from having to reset the set value.

<Example 3>
In the third embodiment, another configuration capable of detecting a change in an external device that is an output source of image data input to one input terminal will be described.
The general configuration of the image processing apparatus (display apparatus) according to the present embodiment is the same as that of the second embodiment (FIG. 8).

  FIG. 13 is an enlarged view of the input terminal 604 portion of the display device 602 according to the present embodiment.

  The SDI cable 1301 is a coaxial cable that transmits an SDI signal. When the SDI signal (image data) output from the external device is input to the display device 602, one end of the SDI cable 1301 is connected to the output terminal of the external device, and the other end is connected to the input terminal 604 of the display device 602. Is done.

The detection switch 1302 detects a non-acquisition period during which image data to be processed (target image data) has not been temporarily acquired. Specifically, the detection switch 1302 detects a period in which the SDI signal to be image processed is not temporarily acquired as a non-acquisition period. In this embodiment, the detection switch 1302 is temporarily connected to the display device 602 by the external device serving as the output source based on the connection state between the display device 602 and the external device that is the output source of the SDI signal to be processed. A period disconnected in the period is detected as a non-acquisition period. Specifically, the detection switch 1302 detects the connection of the external device that is the output source to the display device 602. The detection switch 1302 detects a period in which the external device serving as the output source is temporarily disconnected from the display device 602 as a non-acquisition period. The output source of the SDI signal to be processed can also be called the output source of the target image data. More specifically, the detection switch 1302 detects the connection of the SDI cable 1301 to the input terminal 604. The detection switch 1302 detects a period in which the SDI cable 1301 is temporarily disconnected from the input terminal 604 as a non-acquisition period. As the detection switch 1302, a physical push switch, an optical detection switch, or the like can be used.

FIG. 14 is a flowchart illustrating an example of the operation of the display device 602 according to the present embodiment.
When the SDI cable 1301 and the input terminal 604 are fitted, the detection switch 1302 is turned on. Further, when the SDI cable 1301 and the input terminal 604 are separated from each other, the detection switch 1302 is turned off. The ON state is a state where the connection of the SDI cable 1301 (connection of an external device) is detected, and the OFF state is a state where the connection of the SDI cable 1301 is not detected.

First, the CPU 209 determines whether or not a non-acquisition period is detected by the detection switch 1302 (S1401). Specifically, it is determined that the non-acquisition period has been detected when the state of the detection switch 1302 is switched from the ON state to the OFF state and is switched from the OFF state to the ON state again. In other cases, the non-acquisition period is determined. Is not detected. The process of S1401 is repeated until the non-acquisition period is detected, and after the non-acquisition period is detected, the process proceeds to S1402.
Even when the detection switch 1302 switches from the ON state to the OFF state and switches from the OFF state to the ON state again, detection information indicating that the non-acquisition period has been detected is output from the detection switch 1302. Good. Then, the CPU 209 may determine whether or not a non-detection period is detected using the detection information.

  In step S1402, the CPU 209 inquires of the user whether or not the external device that is the output source (the output source of the SDI signal to be processed) has been changed. Specifically, the CPU 209 outputs an instruction to generate an inquiry image to the OSD control unit 204. The inquiry image is an OSD image for inquiring whether or not the external device as the output source has been changed. By performing the above instruction, an inquiry image is displayed on the screen.

  Next, the user operates the inquiry image and responds whether or not the external device as the output source has been changed. Then, the CPU 209 determines whether or not the user responds that the external device as the output source has been changed (S1403). The user response result is determined based on, for example, an operation signal from the operation unit 208. If the user responds that the external device as the output source has been changed, the process proceeds to S1404.

In step S <b> 1404, the CPU 209 determines that the external device that is the output source has been changed, and resets the setting value of the image processing parameter to an initial value. That is, when the user responds that the external device that is the output source is not changed, the setting value of the image processing parameter is reset to the initial value.
If the user responds that the external device, which is the output source, has not been changed, the setting value is not reset and this flow ends.

As described above, according to this embodiment, when a non-acquisition period is detected, an inquiry is made to the user. Then, according to the response from the user, it is determined whether or not the external device that is the output source of the target image data (the output source of the SDI signal to be processed) is changed. Accordingly, it is possible to detect a change in the external device that is the output source of the image data input to one input terminal.
Further, according to the present embodiment, it is possible to determine whether or not the external device that is the output source of the target image data has been changed with a simple configuration of detecting the connection state of the device (plugging and unplugging).

Note that the reset process may be performed according to the connection state of cables other than the cable that transmits the image data. For example, reset processing may be performed when a calibration sensor is connected to a USB interface.

  In this embodiment, the user is inquired as to whether or not the external device that is the output source of the target image data has been changed, but such an inquiry may not be made. Even when the non-acquisition period is detected, it is determined that the external device that is the output source of the target image data has been changed without making an inquiry to the user, and the setting value of the image processing parameter is reset to the initial value. Good.

In the present embodiment, the example in which the non-acquisition period is detected based on the connection state of the apparatus has been described.
For example, a period in which input of target image data is temporarily interrupted may be detected as a non-acquisition period based on the input state of target image data (SDI signal to be processed). In other words, when there is a non-input period in which an image signal, a synchronization signal, and a clock signal are not input temporarily, the non-input period may be detected as a non-acquisition period.
Even if it is determined that the non-acquisition period has been detected when the input state of the target image data changes from “without input” to “without input” and then changes again from “without input” to “with input”. Good. “With input” is a state in which target image data is input, and “No input” is a state in which target image data is not input.

  Thus, the non-acquisition period can be detected from the input state of the target image data of the display device 602 without providing a new switch. The process of detecting the non-acquisition period based on the input state of the target image data can be performed by the input terminal 604, the receiver 202, the image processing unit 203, the CPU 209, and the like. In addition, a detection unit that monitors input of target image data and detects a non-acquisition period based on an input state of the target image data may be further provided.

  However, when the non-acquisition period is detected based on the input state of the target image data, a period with a low possibility that the external device has been changed may be detected as the non-acquisition period. Specifically, it is unlikely that the external device has been changed in a short period of time during which the input of the target image data is temporarily interrupted. In view of this, it is preferable that a period having a length equal to or greater than a threshold is detected as a non-acquisition period in a period in which input of target image data is temporarily interrupted (a period of “no input”). The threshold value may be a predetermined fixed value or a value that can be changed by the user.

  Further, based on the power state of the display device 602, a period in which the display device 602 is temporarily turned off may be detected as a non-acquisition period. Then, it may be determined that the non-acquisition period has been detected when the power state of the display device 602 is switched from the ON state to the OFF state and is switched again from the OFF state to the ON state.

<Example 4>
The methods of Embodiments 1 to 3 and Embodiment 5 described later can be applied regardless of whether image data to be processed (target image data) is moving image data or still image data. In the fourth embodiment, an example in which the target image data is moving image data and a time code (data indicating the time position of a frame in the moving image) is added to the target image data will be described.
The general configuration of the image processing apparatus (display apparatus) according to the present embodiment is the same as that of the second embodiment (FIG. 8).

FIG. 15 shows an example of the structure of image data to which a time code is added. Specifically, FIG. 15 shows an example of the structure of an SDI signal including a time code. In FIG. 15, the time code is described (superimposed) immediately after the EAV (first of the ANC). TIME CODE in FIG. 15 indicates a time code of image data, where H is an hour, M is minutes, S is seconds, and F is a frame number.
The time code need not be added for each horizontal synchronizing signal (for each line). It is only necessary to add one time code for each vertical synchronization signal (for each frame). Therefore, it is sufficient that the time code is described in the ANC of the vertical synchronization signal.

FIG. 16 is a diagram illustrating an example of a time change of the time code of the target image data.
As time passes, the state of the time code changes from state 1 to state 7. In FIG. 16, the number described in the “time code” column represents the time position (hour: minute: second: frame number) of the target image data. “>” Represents a state in which the time code is continuously changing.
In the example of FIG. 16, it is assumed that the frame number is reset to 0 every second.

In state 1, the time code of the target image data is 00:00:00. That is, in the state 1, the target image data is image data of the first frame of the moving image.
In state 2, the time code of the target image data is continuously changing, such as 00:00:00, 00: 00: 00: 01, 00: 00: 00: 02, and so on.
In state 3, the time code of the target image data is 01: 00: 00: 00. That is, in the state 3, the target image data is image data of a frame one hour after the start of the moving image.

In state 4, the time code of the target image data is 00: 56: 00: 00, and the time code changes discontinuously from state 3. From state 3 to state 4, the time position of the frame subject to image processing is back by 4 minutes.
In the state 5, the time code of the target image data is continuously changed, such as 00: 56: 00: 00: 00, 00: 56: 00: 01, 00: 56: 00: 02, and so on.
In state 6, the time code of the target image data is 01: 00: 00: 00. That is, in the state 6, the target image data is image data of a frame one hour after the start of the moving image.

  In the state 7, the time code of the target image data is 00: 00: 01: 00, and the time code changes discontinuously from the state 6. From state 6 to state 7, the time position of the frame to be image processed goes back 59 minutes. There is a high possibility that such a large discontinuous change in the time code has occurred due to a change in the external device that is the output source of the target image data.

When the external device that is the output source of the target image data is changed, a discontinuous change in the time code occurs.
However, a small discontinuous change in the time code is likely to be caused by fast-forwarding or rewinding the moving image, and may have occurred due to a change in the external device that is the output source of the target image data. Low. Specifically, the discontinuous change of the time code generated from the state 3 to the state 4 is highly likely to be a change generated by performing rewinding of the moving image, and is an external device that is the output source of the target image data. This is unlikely to have occurred due to changes in
In addition, even in a period in which the time code continuously changes, it is unlikely that the external device that is the output source of the target image data has been changed.

Therefore, in the present embodiment, it is determined that the external device that is the output source of the target image data is not changed when the time code continuously changes and when the time code has a small discontinuous change, and the image processing parameter is changed. The set value of is not reset. As a result, in the period from state 1 to state 6 in FIG. 16, image processing is performed without resetting the set value of the image processing parameter to the initial value. For example, in the period of states 1 to 6, it is determined that an operation for adjusting the setting value of the image processing parameter is performed, and the image processing is performed without resetting the setting value to the initial value.

  On the other hand, a large discontinuous change in the time code is highly likely to have occurred due to a change in the external device that is the output source of the target image data. Specifically, it is highly likely that the discontinuous change in the time code that has occurred from state 6 to state 7 has occurred due to a change in the external device that is the output source of the target image data.

  Therefore, in this embodiment, when a large discontinuous change in the time code occurs, it is determined that the external device that is the output source of the target image data has been changed, and the setting value of the image processing parameter is reset. The determination using the time code (determination as to whether or not the external device that is the output source of the target image data has been changed) and the reset process are performed by the CPU 209 as in the other embodiments. Specifically, the CPU 209 outputs the image processing target image data when the difference between the time position of the image processing target frame and the time position of the frame immediately before the image processing target is a predetermined value or more. It is determined that the external device is changed. Then, the CPU 209 resets the setting value of the image processing parameter to the initial value.

  As described above, according to the present embodiment, it is determined whether or not the external device that is the output source of the target image data has been changed using the time code. Accordingly, it is possible to detect a change in the external device that is the output source of the image data input to one input terminal.

  Note that the time code and the setting value of the image processing parameter may be recorded in the memory 210 in association with each other. With such a configuration, the adjustment value to be set can be determined from the time code, and the image processing can be performed by automatically setting the adjustment value.

<Example 5>
When an external device outputs image data, external device identification data indicating the device itself may be added to the image data. In the fifth embodiment, an example in which camera information regarding the camera 101 is added to the image data output from the camera 101 will be described.
In this embodiment, it is assumed that the recording device 103 does not add external device identification data.
The general configuration of the image processing apparatus (display apparatus) according to the present embodiment is the same as that of the second embodiment (FIG. 8).

FIG. 17 is a diagram illustrating an example of the structure of image data to which camera information is added. Specifically, FIG. 17 is a diagram illustrating an example of a structure of an SDI signal output from the camera 101, and is a diagram illustrating an example of a structure of an SDI signal including camera information.
CMR_F represents a camera information flag, and CMR_D represents camera information. Specifically, a data sequence of 0EEh, 0EEh, and 001h is described as a camera information flag. As the camera information, the model number of the camera 101, a serial number, information on the lens used at the time of taking the image data, and the like are described.

In this embodiment, the image processing unit 203 performs image processing on image data to be processed (target image data), and deletion processing for deleting external device identification data indicating an external device that is an output source of the target image data. Apply. Specifically, the image processing unit 203 performs image processing and deletion processing for deleting external device identification data indicating an external device that is an output source of the image processing target SDI signal, on the image processing target SDI signal. . Further, the image processing unit 203 determines whether or not external device identification data is added to the target image data, and outputs the determination result to the CPU 209.
In the example of FIG. 17, the image processing unit 203 determines whether the ANC of the SDI signal includes a data sequence of 0EEh, 0EEh, and 001h. When the data sequence of 0EEh, 0EEh, 001h is detected from the ANC of the SDI signal, the image processing unit 203 determines that the external device identification data is added to the target image data, and the external device identification is performed. Delete the data. Specifically, CMR_F and CMR_D are deleted. If the data sequence of 0EEh, 0EEh, 001h is not detected from the ANC of the SDI signal, the image processing unit 203 determines that the external device identification data is not added to the target image data.

  When the external device identification data is not added to the target image data, the CPU 209 determines that the external device that is the output source (the output source of the SDI signal to be processed) is changed, and the image processing parameter Reset the set value to the initial value. If the external device identification data is added to the target image data, the image processing is performed without resetting the setting value of the image processing parameter to the initial value.

  As described above, according to the present embodiment, it is determined whether or not the external device that is the output source of the target image data (the output source of the SDI signal to be processed) is changed using the external device identification data. Is done. Accordingly, it is possible to detect a change in the external device that is the output source of the image data input to one input terminal.

Note that the external device identification data added to the target image data and the adjustment value (the value of the CDL parameter) for the target image data may be recorded in the memory 210 in association with each other.
Therefore, if the external device identification data and the adjustment value are recorded in association with each other, when image data that has been input to the display device 602 in the past is input to the display device 602 again, the adjustment value used in the past is used. It is possible to perform image processing by setting the same adjustment value. As a result, the same display as the past display can be reproduced. Assume that the external device that is the output source of the target image data is switched from the camera 101 to the recording device 103 and then switched from the recording device 103 to the camera 101 again. If the external device identification data and the adjustment value are associated with each other and recorded in the memory 210, the adjustment value set for the image data from the camera 101 before switching to the recording device 103 (for the image data from the camera 101). Image adjustment value) can be performed.

  Note that even if a plurality of external devices are of the same type, a plurality of external devices can be distinguished if the external device identification data differs between the external devices. For example, it is assumed that CMR_D added to the image data output from the camera A is 001h, and CMR_D added to the image data output from the camera B is 002h. In this case, it can be determined from CMR_D whether the output source of the image data is camera A or camera B. Even with multiple external devices of the same type, if the external device identification data is different between external devices, the adjustment value can be managed for each device, so the same adjustment value as that used in the past was used. Image processing can be performed more reliably.

Further, by performing hierarchical management of CMR_D, information such as a lens used at the time of photographing can be included in the external device identification data.
As a hierarchical management method, there are a method for managing each DataStream and a method for managing CMR_D by dividing it into a plurality of clocks.
In the management method for each DataStream, for example, camera model information is stored in DataStream1, and lens information is stored in DataStream2.
In the management method divided into a plurality of clocks, for example, camera model information is stored in a clock next to CMR_F, and lens information is stored in clocks subsequent to CMR_F.
By including information other than the model information in the external device identification data, it is possible to accurately determine the image data. For example, even when multiple pieces of image data are output from the same camera, if the lens information is different from each other, they can be determined as different image data. As a result, image processing using the same adjustment value as that used in the past can be performed more reliably.

<Other examples>
The present invention can also be implemented by a system (or a device such as a CPU or MPU) of a system or apparatus that implements the functions of the above-described embodiments by reading and executing a program recorded in a storage device. The present invention can also be implemented by a method comprising steps executed by a computer of a system or apparatus that implements the functions of the above-described embodiments by reading and executing a program recorded in a storage device, for example. . For this purpose, the program is stored in the computer from, for example, various types of recording media that can serve as the storage device (ie, computer-readable recording media that holds data non-temporarily). Provided to. Therefore, the computer (including devices such as CPU and MPU), the method, the program (including program code and program product), and the computer-readable recording medium that holds the program non-temporarily are all present. It is included in the category of the invention.

102, 602 Display device 104 First input terminal 105 Second input terminal 203 Image processing unit 209 CPU
604 input terminal

Claims (28)

Acquisition means for acquiring image data output from an external device;
Setting means for setting values of image processing parameters relating to predetermined image processing;
Image processing means for performing the predetermined image processing on the image data acquired by the acquisition means using the set value of the image processing parameter set by the setting means;
Determining means for determining whether or not an external device that is an output source of image data to be processed has been changed;
Output means for outputting image data subjected to the predetermined image processing by the image processing means to a display panel;
Have
In response to determining that the external device that is the output source of the image data to be processed is changed by the determining unit, the setting unit resets the setting value of the image processing parameter to an initial value, and the setting An image processing apparatus, wherein the output means outputs the image data subjected to the predetermined image processing using the set value of the image processing parameter set to an initial value by the means. The image processing apparatus according to claim 1, wherein the predetermined image processing includes gamma processing or color processing. The image processing apparatus according to claim 1, wherein the image processing parameter includes a parameter of ASC (American Society of Cinematographers) -CDL (Color Decision List). The value of the image data after the predetermined image processing is performed using the setting value of the image processing parameter set to the initial value by the setting means is the image data before the predetermined image processing is performed. The image processing apparatus according to claim 1, wherein the image processing apparatus does not change from the value of the image processing apparatus. The image processing apparatus according to claim 1, wherein the setting unit sets the value of the image processing parameter in accordance with a user operation. A plurality of acquisition means each for acquiring image data output from an external device;
Selection means for selecting any one of the plurality of acquisition means;
Further comprising
The image processing means performs the predetermined image processing on the image data acquired by the acquisition means selected by the selection means,
6. The determination unit according to claim 1, wherein when the acquisition unit selected by the selection unit is changed, the determination unit determines that an external apparatus that is an output source of image data to be processed is changed. The image processing apparatus according to any one of the above. The determination means determines whether or not an external device that is an output source of image data to be processed has been changed based on predetermined additional data added to the image data acquired by the acquisition means. The image processing apparatus according to claim 1, wherein: The image processing apparatus according to claim 7, wherein the predetermined additional data includes processing completion data indicating that the predetermined image processing has been executed. The image processing apparatus according to claim 7, wherein the predetermined additional data includes identification data indicating the image processing apparatus. The image processing apparatus according to claim 7, wherein the predetermined additional data includes a parameter setting value that can be set by the image processing apparatus. The image processing apparatus according to claim 7, wherein the predetermined additional data includes a value of the image processing parameter. The image processing apparatus according to claim 7, wherein the predetermined additional data includes a value of a parameter other than the image processing parameter. The image processing target image data further includes detection means for detecting a non-acquisition period in which the image data was not temporarily acquired,
13. The determination unit according to claim 1, wherein when the non-acquisition period is detected by the detection unit, it is determined that an external device that is an output source of image data to be processed has been changed. The image processing apparatus according to any one of the above. The image processing target image data further includes detection means for detecting a non-acquisition period in which the image data was not temporarily acquired,
The determination means includes
When the non-acquisition period is detected by the detection means, the user is inquired whether or not the external device that is the output source of the image data to be processed has been changed,
When the user responds that the external device that is the output source of the image data to be processed is changed, it is determined that the external device that is the output source of the image data to be processed has been changed. Item 13. The image processing apparatus according to any one of Items 1 to 12. The detection unit is configured such that an external device that is an output source of image data to be processed is connected to the image processing device based on a connection state between the external device that is an output source of image data to be processed and the image processing device. The image processing apparatus according to claim 13, wherein a period temporarily disconnected from the image is detected as the non-acquisition period. The detection means detects, as the non-acquisition period, a period in which input of image data to be processed is temporarily interrupted based on an input state of image data to be processed. The image processing apparatus according to any one of -15. The detection means, based on the input state of the image data to be processed, sets a period longer than a threshold among the periods in which the input of image data to be processed is temporarily interrupted as the non-acquisition period The image processing apparatus according to claim 13, wherein the image processing apparatus detects the image processing apparatus. 18. The detection unit according to claim 13, wherein the detection unit detects a period during which the power of the image processing apparatus is temporarily turned off as the non-acquisition period based on a power state of the image processing apparatus. The image processing apparatus according to any one of the above. The image data to be processed is moving image data,
The determination means is an external source that is an output source of image data to be processed when the difference between the time position of the frame to be processed and the time position of the frame to be processed immediately before is a predetermined value or more. The image processing apparatus according to claim 1, wherein the apparatus is determined to have been changed. The image processing means performs the predetermined image processing and deletion processing for deleting external device identification data indicating an external device that is an output source of the image processing target image data, on the image processing target image data,
The determination unit determines that the external device that is the output source of the image data to be processed has been changed when the external device identification data has not been added to the image data to be processed. The image processing apparatus according to claim 1. Acquisition means for acquiring image data output from an external device;
Setting means for setting values of image processing parameters relating to predetermined image processing;
Image processing means for performing the predetermined image processing on the image data acquired by the acquisition means using the set value of the image processing parameter set by the setting means;
Output means for outputting image data subjected to the predetermined image processing by the image processing means to a display panel;
Have
The setting means, when the power of the images processing apparatus is turned off by the user, the image processing apparatus characterized by resetting the set value of the image processing parameter to an initial value. The image processing apparatus according to claim 21, wherein the predetermined image processing includes gamma processing or color processing. 23. The image processing apparatus according to claim 21, wherein the image processing parameter includes an ASC (American Society of Cinematographers) -CDL (Color Decision List) parameter. The value of the image data after the predetermined image processing is performed using the setting value of the image processing parameter set to the initial value by the setting means is the image data before the predetermined image processing is performed. The image processing apparatus according to any one of claims 21 to 23, wherein the image processing apparatus does not change from the value of. 25. The image processing apparatus according to claim 21, wherein the setting unit sets the value of the image processing parameter in accordance with a user operation. An acquisition step of acquiring image data output from an external device;
A setting step for setting values of image processing parameters relating to predetermined image processing;
An image processing step of applying the predetermined image processing to the image data acquired in the acquisition step using the setting value of the image processing parameter set in the setting step;
A determination step of determining whether or not an external device that is an output source of image data to be processed is changed;
An output step of outputting the image data subjected to the predetermined image processing in the image processing step to a display panel;
Have
In response to determining that the external device that is the output source of the image data to be processed is changed in the determination step, the setting step resets the setting value of the image processing parameter to an initial value, and An image processing apparatus characterized in that the image data subjected to the predetermined image processing using the set value of the image processing parameter set to the initial value in the setting step is output to the display panel in the output step. Control method. An acquisition step of acquiring image data output from an external device;
A setting step for setting values of image processing parameters relating to predetermined image processing;
An image processing step of applying the predetermined image processing to the image data acquired in the acquisition step using the setting value of the image processing parameter set in the setting step;
An output step of outputting the image data subjected to the predetermined image processing in the image processing step to a display panel;
Have
Said setting step, when the power of the images processing apparatus is turned off by the user, the control method for an image processing apparatus characterized by resetting the set value of the image processing parameter to an initial value.   A program that causes a computer to function as each unit of the image processing apparatus according to any one of claims 1 to 25.

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