JP4763941B2 - Display control device, control method, program, and recording medium - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present invention has an auto bracketing (automatic step exposure) function for performing continuous shooting while automatically changing the exposure value and the white balance adjustment value.Display control device, control method, program, and recording mediumAbout.
[0002]
[Prior art]
Conventionally, with still cameras using silver halide film, if it is difficult to determine the proper exposure, such as when there are some scenes at sunset or subjects with high reflectivity, multiple exposures can be made while slightly changing the exposure of the same scene. A so-called automatic exposure bracketing (automatic exposure bracketing) shooting is performed in which a frame is taken and an appropriate exposure frame is selected from the frames.
[0003]
Even when an electronic still camera using a CCD or the like is used as a photographic device, the situation regarding exposure is the same. When shooting with an inappropriate exposure amount, a dark image (underexposure) or conversely too bright (overexposure) Therefore, in the scene where it is difficult to determine the exposure, auto bracketing shooting is performed as in the case of the silver salt camera.
[0004]
As a setting method of such an auto bracketing mode, conventionally, an auto bracketing setting mode is selected, and an operation member such as an electronic dial is operated to set a correction amount for performing auto bracketing photographing. Then, returning to the normal shooting mode, the exposure value for shooting is determined. Then, with respect to this exposure value, the set correction amount and exposure are changed (shutter speed and aperture value are changed), and photographing is automatically performed.
[0005]
In addition, there is a method of performing bracketing shooting by changing at least one of image processing parameters such as CCD gain, gamma characteristics, and white balance, which is unique to electronic cameras. For example, changing the gain and gamma characteristics of the CCD Japanese Laid-Open Patent Publication No. 11-004380 discloses a method for automatically changing the exposure value and performing auto bracketing photography.
[0006]
Further, there is disclosed a technique for performing auto bracketing photographing by automatically changing an adjustment value of white balance which is one of image processing parameters.
[0007]
In these disclosed gazettes, a function is provided to display a photographed image including a bracketing photographed image on an external display so that the photographer can check after photographing.
[0008]
[Problems to be solved by the invention]
However, since there is no information display for identifying an auto bracketing shot image in the image confirmation after auto bracketing shooting that changes the exposure value or white balance adjustment value described above, there are the following problems. .
[0009]
{Circle around (1)} Since it is not easy to identify which photographed image is the bracketing photographed image, the photographer spends extra time searching for the bracketed photographed image.
[0010]
(2) Since the correction amount is not displayed, it is difficult to identify the bracketing photographed image when the correction amount is small.
[0011]
(3) It is difficult to identify which image processing parameter corresponds in the image confirmation after performing auto bracketing photographing with a plurality of image processing parameters.
[0012]
(4) Since the correction amount is not displayed, there is a problem that the correspondence between the correction amount and the change in the photographed image cannot be taken.
[0013]
  The present invention was made in order to solve the above-described drawbacks of the prior art, and in captured image confirmation after performing auto bracketing imaging that changes image processing parameters such as exposure value and white balance adjustment value, A configuration that allows easy identification of the bracketing image and the correction valueDisplay control deviceAnd control method, Program, storage mediumThe purpose is to provide.
[0014]
[Means for Solving the Problems]
  In order to solve the above problems, the display control device of the present invention provides:
  For each shooting, auto bracketing is performed for a plurality of shootings in which a setting parameter of a specific type related to shooting is set to a reference value and a correction value corrected by a correction amount with respect to the reference value based on a single shooting instruction. Reading means for reading out the bracketing shot image shot in the shooting mode;
The type of the setting parameter corrected in the auto bracketing shooting mode of the electronic camera when the bracketing shooting image is shot, the reference value, and the bracketing shooting image read by the reading means And display control means for controlling to display the correction amounts in association with the display means at the same time.
[0025]
That is, according to the first aspect of the present invention, the photographer can simultaneously identify the correction amount together with the image processing parameter corresponding to the same screen as the auto bracketing photographed image.
[0026]
In the invention described in claim 2, the image processing parameter for which the photographer can set the reference value displays the image processing parameter and the reference value, and the image processing parameter for which the camera automatically sets the reference value is only the image processing parameter. Since it is displayed, it is possible to distinguish between the reference value set externally and the reference value set automatically.
[0027]
In the third aspect of the present invention, the correction amount information is displayed as a relative value with respect to the reference value when the reference value is an image processing parameter that can be set by the photographer. It can be judged relatively.
[0028]
In the invention of claim 4, the correction amount information is displayed as an absolute value of the correction amount in the case of an image processing parameter in which the reference value is automatically set by the camera. Also, the corrected captured image can be determined in terms of absolute value.
[0029]
According to the fifth aspect of the present invention, since the correction amount information is displayed even with the reference value photographed image without correction, it can be seen that it is a bracketing photographed image.
[0030]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of an electronic camera according to the present invention will be described below.
[0031]
FIG. 1 is a top view of the appearance of a single-lens reflex type electronic camera according to an embodiment of the present invention, FIG. 2 is a rear view of the appearance of a single-lens reflex type electronic camera according to an embodiment of the present invention, and FIG. 4 is a block diagram showing a configuration of a control system of a single-lens reflex electronic camera in the embodiment, and FIGS. 4A, 4B, and 4C are top surface liquid crystal display units of the single-lens reflex electronic camera in the embodiment according to the present invention. FIG. 5 is a flowchart showing an ISO bracketing setting operation of the single-lens reflex type electronic camera in the embodiment according to the present invention, and FIG. 6 is a single lens in the embodiment according to the present invention. FIG. 7 is a flowchart showing a sequence control operation in ISO bracketing photographing of the reflex type electronic camera, and FIG. 7 shows detailed control of photographing processing in step S204 of FIG. FIG. 8 is an explanatory diagram showing a display example of an ISO bracketing photographed image of a single-lens reflex type electronic camera according to an embodiment of the present invention. FIG. 8A is a minus one step (ISO100) with respect to a reference value ISO200. (B) is a display example of a photographed image photographed with a reference value (no correction amount), and (c) is one step higher than the reference value ISO200 (equivalent to ISO400). 9 (a), 9 (b), and 9 (c) are display examples of a WB (white balance) bracketing photographed image of the single-lens reflex type electronic camera in the embodiment according to the present invention. FIG. 10 is an explanatory diagram illustrating an example of an image displayed on the rear liquid crystal display unit of the single-lens reflex type electronic camera according to the embodiment of the present invention.
[0032]
Hereinafter, embodiments of the present invention will be described in detail with reference to examples of single-lens reflex electronic cameras.
[0033]
In this embodiment, a detachable recording device is used as the recording means. However, the present invention is not limited to this, and can be similarly implemented by incorporating the recording device.
[0034]
1 and 2 show a “single-lens reflex type electronic camera” which is an embodiment of the present invention.
[0035]
FIG. 1 is an external top view of a single-lens reflex electronic camera according to an embodiment of the present invention, and FIG. 2 is an external rear view of the electronic camera.
[0036]
1 and 2, reference numeral 100 denotes a camera body, and 111 denotes an eyepiece window for finder observation. Reference numeral 112 denotes an AE (automatic exposure) lock button, and reference numeral 113 denotes an AF (autofocus) distance measuring point selection button.
[0037]
Reference numeral 114 denotes a release button for performing a photographing operation, which is configured such that SW1 is turned on in the first stroke and SW2 is turned on in the second stroke.
[0038]
Reference numeral 115 denotes a main electronic dial which is a first operation means. For example, a 2-bit signal with a 90 ° phase shift is sent to the microcomputer (MPU) 1 to detect the rotation direction and the number of clicks.
[0039]
By detecting this rotation direction and the number of rotation clicks, it is possible to input numerical values to the camera and switch the shooting mode in combination with other operation buttons.
[0040]
Since this information setting method is known in Japanese Patent Laid-Open Nos. 58-63922 and 60-103331, detailed description thereof is omitted.
[0041]
In FIGS. 1 and 2, 117 is a shooting mode selection button, 118 is an AF mode selection button, 119 is a photometry mode selection button, and also functions as a light control button.
[0042]
For example, if the main electronic dial 115 is rotated while the shooting mode selection button 117 is being pressed, Tv priority → Av priority → Manual → Program → Tv priority → Av priority → Manual → Program... Is changed to the mode intended by the photographer. Can be set.
[0043]
When the main electronic dial 115 is rotated in the reverse direction, the mode is changed as follows: program → manual → Av (aperture) priority → Tv (shutter) priority → program →.
[0044]
When Tv priority is set as a mode by the shooting mode selection button 117 and the electronic dial 115, the Tv value (shutter speed) desired by the photographer can be set by rotating the main electronic dial 115. it can.
[0045]
When Av priority is set as the mode by the shooting mode selection button 117 and the main electronic dial 115, the Av value (aperture value) desired by the photographer is set by rotating the main electronic dial 115. be able to.
[0046]
Further, by simultaneously pressing an AF (autofocus) mode selection button 118 and a photometry mode selection button 119, an ISO bracketing setting mode in which an ISO value can be set or an ISO bracketing can be set is selected. The ISO bracketing setting mode will be described later in detail.
[0047]
2 and 3, reference numeral 120 denotes an LCD monitor device (liquid crystal display) as display means for displaying a photographed image.
[0048]
In FIG. 2, reference numeral 121 denotes a monitor switch for turning on / off the LCD monitor device 120.
[0049]
Since the LCD monitor device 120 in this embodiment is a transmissive type, an image cannot be visually recognized only by driving the LCD monitor device, and a backlight illumination device (not shown) is always required on the back surface.
[0050]
In FIGS. 1 and 2, reference numeral 116 denotes a sub electronic dial which is a second operation means having the same function as the main electronic dial 115. When the manual mode is set by the shooting mode selection button 117 and the main electronic dial 115, the appropriate exposure measured in the aperture value input setting, program mode (P), shutter priority mode (Tv), and aperture priority mode (Av). On the other hand, the exposure correction amount input setting for changing the control exposure amount of the camera is performed.
[0051]
In FIG. 2, 122 is a dial lock switch for locking the input function by the sub electronic dial 116, and 123 is a main switch for prohibiting all operations of the electronic camera.
[0052]
Reference numeral 124 denotes a menu button for selecting a mode when displaying an image on the LCD monitor device 120 or when initializing the camera. When selecting each mode, the sub-electronic dial 116 is pressed while pressing the menu button 124. Rotate to select the desired mode. When the desired mode is selected, release the menu button 124 to complete the selection.
[0053]
140 arranged on the upper surface of the camera and 140A arranged on the rear surface of the camera are external liquid crystal display devices including a liquid crystal display device having an external display function for displaying photographing conditions and the like. Reference numeral 125 denotes a white balance (hereinafter abbreviated as WB) mode selection button for selecting white balance adjustment from an auto white balance mode, a fluorescent lamp mode, a strobe mode, and the like, and is operated simultaneously with the main electronic dial 115 and the sub electronic dial 116. WB mode selection and WB bracketing shooting can be set. The WB bracketing setting mode will be described later in detail.
[0054]
Reference numeral 126 denotes a recording image quality selection button for selecting recording of an image to be taken from large / fine (F / L), large / normal (N / L), small / fine (F / S), etc. JPEG format). Further, the WB mode, the recording image quality mode, and the like are displayed on the external liquid crystal display device 140A disposed on the back surface.
[0055]
The photographing lens 200 can be exchanged with the camera body 100 via a body mount (not shown).
[0056]
FIG. 3 is a block diagram showing the configuration of the control system of the “single-lens reflex type electronic camera” in the embodiment according to the present invention.
[0057]
In FIG. 3, reference numeral 1 denotes a central processing unit (hereinafter referred to as MPU) of a microcomputer which is a control means built in the camera body.
[0058]
The MPU 1 includes an AF drive circuit 12, an aperture drive circuit 13, a mirror drive circuit 14, a focus detection circuit 16, a shutter drive circuit 17, a video signal processing circuit 11, a switch sense circuit 21, a photometric circuit 23, and a liquid crystal display drive circuit 24. It is connected. The MPU 1 sequentially controls each element and the circuit in a predetermined order.
[0059]
Reference numeral 200 denotes a photographing lens, and an AF (autofocus) driving circuit 12 is constituted by, for example, a stepping motor, and focuses the CCD 7 by changing the position of the focus lens in the photographing lens 200 under the control of the MPU 1.
[0060]
The aperture driving circuit 13 is configured by, for example, an auto iris or the like, and changes the optical aperture value by changing the aperture 2 under the control of the MPU 1.
[0061]
The main mirror 4 guides the subject image formed by the photographing lens 200 to the pentaprism (pentagonal roof prism) 3 and transmits part of the subject image to the focus detection sensor 15 through the submirror 5 described later. It is. The mirror drive circuit 14 is configured to be movable between a position where the subject image can be observed with the viewfinder and a retreat position where the subject image is retracted from the optical path of the subject light beam during photographing.
[0062]
The sub mirror 5 is for reflecting the subject light transmitted through a part of the main mirror 4 and guiding the subject image to the focus detection sensor 15. The sub mirror 5 is linked to the main mirror 4 or the mirror driving circuit 14 of the main mirror 4, and when the main mirror 4 is at a position where a subject image can be observed with a finder, the sub mirror 5 is connected to the focus detection sensor 15. It is configured to be movable to a position for guiding light and to a retreat position for retreating from the optical path of the subject light beam at the time of photographing.
[0063]
The mirror drive circuit 14 is composed of, for example, a DC motor and a gear train, and drives the main mirror 4 and the sub mirror 5 under the control of the MPU 1.
[0064]
The pentaprism (pentagonal roof prism) 3 is an optical member that converts and reflects the subject image guided by the main mirror 4 into an erect image.
[0065]
The subject luminous flux that has passed through the photographing lens 200 passes through the aperture 2, is reflected by the main mirror 4, is guided to the pentaprism 3, and the subject image can be observed through the eyepiece window 111.
[0066]
Furthermore, it is guided to the photometric sensor 22. Further, the light beam that has passed through the main mirror 4 is reflected by the sub mirror 5 and re-imaged on the detection surface of the focus detection sensor 15 placed at a position substantially equivalent to the CCD 7 surface.
[0067]
The optical image is converted into an electrical image signal and supplied to the focus detection circuit 16.
[0068]
The focus detection circuit 16 performs accumulation control and readout control of the focus detection sensor 15 according to the signal of the MPU 1 and outputs pixel information to the MPU 1.
[0069]
The MPU 1 performs a focus detection calculation by a known phase difference detection method based on the image signal of the subject image from the focus detection circuit 16, and the difference between the imaging surface formed by the photographic lens 200 and a predetermined imaging surface such as a film surface, That is, the defocus amount and the defocus direction are obtained.
[0070]
Then, based on the calculated defocus amount and defocus direction, the MPU 1 changes the focus lens position in the photographing lens 200 via the AF drive circuit 12 and drives it to the in-focus position.
[0071]
Reference numeral 6 denotes a mechanical shutter device that blocks the subject luminous flux during finder observation, and retracts from the optical path of the subject luminous flux according to a release signal during imaging, and a leading blade group 6a (not shown) that starts exposure, and the subject luminous flux during finder observation. It is a focal plane shutter that is retracted from the optical path and has a rear blade group 6b (not shown) that shields subject light flux at a predetermined timing after the start of traveling of the front blade group 6a (not shown) during imaging. The mechanical shutter device 6 is controlled by a shutter drive circuit 17 that receives a command from the MPU 1.
[0072]
In the present embodiment, the case where both the front blade group 6a and the rear blade group 6b are provided is described. However, when exposure is started with only one shielding member, the light beam is retracted from the optical path of the subject luminous flux. However, it may be configured to return to a position where the optical path of the subject light flux is again blocked after the photographing is completed.
[0073]
Reference numeral 7 denotes a solid-state image sensor that captures a subject image formed by the photographing lens 200 and converts it into an electrical signal. A CCD, which is a known two-dimensional imaging device, is used as the solid-state imaging device. There are various types of imaging devices such as a CCD type, a MOS type, a CID type, and a CPD type, and any type of imaging device may be adopted. In this embodiment, a photoelectric conversion element (photosensor) ) Are two-dimensionally arranged, and an interline CCD image pickup device is employed in which signal charges accumulated in each sensor are output via a vertical transfer path and a horizontal transfer path.
[0074]
Reference numeral 8 denotes a clamp / CDS (correlated double sampling) circuit that performs basic analog processing before A / D conversion and can also change the clamp level.
[0075]
Reference numeral 9 denotes an AGC (automatic gain adjusting device) that performs basic analog processing before A / D conversion and can change the AGC basic level. The AGC basic level is set to a value corresponding to the ISO setting described later. That is, when the ISO value (exposure value) is changed, the basic level of AGC is changed.
[0076]
An A / D converter 10 converts an analog CCD 7 output signal into a digital signal.
[0077]
The CCD 7, the clamp / CDS circuit 8, the AGC 9, and the A / D converter 10 constitute an imaging means.
[0078]
Reference numeral 11 denotes a video signal processing circuit as an image processing means, which is responsible for overall image processing by hardware, such as white balance characteristics, gamma characteristics, filter processing, and information synthesis processing for monitor display, on digitized image data of the CCD 7. To do.
[0079]
The image data for monitor display from the video signal processing circuit 11 is displayed on the LCD monitor 120 as image display means via the LCD drive circuit 25.
[0080]
The switching of these functions is performed by exchanging data with the MPU 1, and the white balance information and gain information of the output signal of the CCD 7, which is one of the image processing parameters, can be output to the MPU 1 as necessary. Based on this, the MPU 1 performs white balance adjustment and gain adjustment.
[0081]
Further, it is also possible to store image data in the buffer memory 27 through the memory controller 26 without doing anything in response to an instruction from the MPU 1. The video signal processing circuit 11 also has a function of performing compression processing such as JPEG.
[0082]
In the case of continuous shooting, image data is temporarily stored in the buffer memory 27 serving as image storage means. When processing time is required, unprocessed image data is read out through the memory controller 26, and the video signal processing circuit 11 reads the image data. It is configured to increase the continuous shooting speed by performing processing and compression processing. The number of continuous shots greatly depends on the capacity of the buffer memory 27.
[0083]
In the memory controller 26, unprocessed digital image data input from the video signal processing circuit 11 is stored in the buffer memory 27, and the processed digital image is recorded in the memory 28 as image recording means, or conversely. 27 and the memory 28 output image data to the video signal processing circuit 11.
[0084]
Further, the memory controller 26 can record the video sent via the external interface 29 in the memory 28 and can output the image recorded in the memory 28 via the external interface 29. The memory 28 is configured to be removable from the camera body.
[0085]
Reference numeral 21 denotes a switch sense circuit which controls each part according to the operation state of each switch.
[0086]
Reference numeral 114a denotes a switch SW1 that is turned on by the first stroke of the release button 114. 114b is a switch SW2 that is turned on by the second stroke of the release button 114. When the switch SW2 is turned on, the release operation is started.
[0087]
Further, a main electronic dial 115, a sub electronic dial 116, a shooting mode selection button 117, an AF mode selection button 118, and a photometry mode selection button 119 are connected, and the state of each button / SW is transmitted to the MPU 1.
[0088]
A photometric circuit 23 outputs an output from the photometric sensor 22 to the MPU 1 as a luminance signal for each area in the screen. The MPU 1 performs A / D conversion on the luminance signal and calculates the exposure at the time of shooting.
[0089]
A liquid crystal display driving circuit 24 drives the external liquid crystal display devices 140 and 140A and the in-finder liquid crystal display 30 in accordance with the display content command of the MPU 1. Further, the liquid crystal display driving circuit 24 can put a specific segment in a blinking display state according to an instruction from the MPU 1.
[0090]
A power source 31 supplies power necessary for each IC (integrated circuit) and drive system.
[0091]
Next, a setting method for ISO bracketing shooting will be described with reference to FIGS.
[0092]
In the present embodiment, ISO bracketing shooting is performed by only correcting the gain for a shot image without changing the exposure time (without changing the shutter speed or aperture value) for the sake of simplicity. It is assumed that bracketing shooting is performed by changing the ISO value, but of course bracketing shooting may be performed by changing the shutter speed and aperture value.
[0093]
In this embodiment, the ISO value is changed by changing the gain of the CCD. However, the present invention is not limited to this. For example, the gamma value may be changed.
[0094]
In step S100 of FIG. 5, it is determined whether both the AF mode selection button 118 and the AE mode selection button 119 are turned on. If it is determined that it is turned on, the process proceeds to step S101 to enter the ISO bracketing setting mode. At this time, the external liquid crystal display device 140 displays as shown in FIGS. 4 (a), 4 (b), and 4 (c).
[0095]
In FIG. 4, FIG. 4 (a) shows an initial state. When an operation described in detail later is performed, the display changes to the display in FIG.
[0096]
In the display screen of FIG. 4, reference numeral 140a indicates a set ISO value (exposure value). Reference numeral 140b denotes the ISO bracketing correction amount in dots, which represents 1/3 stage of 1 dot. Reference numeral 140c denotes a bracketing correction amount in a 7-segment display.
[0097]
Returning to FIG. 5, in steps S102 and S104, the input of the main electronic dial 115 and the sub electronic dial 116 is determined. When no input is made, the process proceeds to step S107.
[0098]
When the input of the main electronic dial 115 is confirmed in step S102, the ISO value is changed in step S103. In this case, if the initial value is ISO 200, the display of 140a in FIG. 4 is performed in 1/3 steps from 200 to 250 to 320 to 400 to 1600 every time the main electronic dial 115 is rotated by one click. It will increase. Further, when operated in the reverse rotation direction, 1600 → 1250 → 1000 → 800.
[0099]
Returning to FIG. 5, when the input of the sub electronic dial 116 is confirmed in step S104, the bracketing correction amount is determined in step S105.
[0100]
The display 140b in FIG. 4 at this time changes from the state of FIG. 4A showing the initial state by one dot every time the sub electronic dial 116 is rotated by one click. FIG. 4B shows a dot state when the sub electronic dial 116 is operated by one click from the initial state FIG. 4A, and FIG. 4C shows two clicks from the initial state of the sub electronic dial 116. Indicates the operated state.
[0101]
When the sub electronic dial 116 is rotated in the reverse direction, the state changes from the state shown in FIG. 4C to the state shown in FIG. 4B to FIG.
[0102]
The display of 140c also corresponds to the display of dots, and every time the sub electronic dial 116 is rotated by one click, it is incremented by 1/3 from 0.0 → 0.3 → 0.7 →. It will change. Moreover, if it rotates in the reverse direction, it will change with 3.0-> 2.7-> 2.3-> ...-> 0.0.
[0103]
Returning to FIG. 5, when ISO bracketing correction is performed in step S105, an ISO bracketing flag is set in step S106, the variable N = 0 is stored in the memory in the MPU 1, and step S107 is performed. Migrate to When this flag is set, ISO bracketing photography described later is performed. That is, when the sub electronic dial 116 is operated in the ISO setting mode and the bracketing correction amount is set, ISO bracketing shooting is performed.
[0104]
In step S107, it is determined whether or not the AF mode selection button (SW) 118 and the AE mode selection button (SW) 119 are turned off. If they are not turned off, the operations described above are repeated to determine that they are turned off. When done, the ISO bracketing setting mode is terminated.
[0105]
Next, an ISO bracketing imaging sequence will be described with reference to FIG.
[0106]
In step S201 in FIG. 6, it is determined whether or not SW1 is turned on. If it is determined that SW1 is turned on, the process proceeds to step S202.
[0107]
In step S202, based on the data output from the photometry circuit 23, the MPU 1 calculates an exposure value (calculates shutter speed and aperture value).
[0108]
The photometric circuit 23 performs a known photometric calculation weighted to a photometric area (not shown) including the focused focus detection area, and an exposure value is calculated.
[0109]
At the same time, the MPU 1 calculates and determines the lens driving amount based on the focus information that is the output of the focus detection circuit 16, drives a part of the photographing lens 200 using the AF driving circuit 12, and adjusts the focus.
[0110]
In step S203, it is determined whether or not SW2 is turned on. When it is determined that it is not turned ON, the process returns to step S201, and the operation already described is repeated. If it is determined in step S203 that the power has been turned on, the process proceeds to step S204.
[0111]
The photographing process in step S204 will be described in detail with reference to FIG.
[0112]
FIG. 7 shows a detailed flowchart of the photographing process in step S204 of FIG.
[0113]
In FIG. 7, in step S301, the mirror drive circuit 14 moves the main mirror 4 and the sub mirror 5 to the mirror-up position according to a command from the MPU 1.
[0114]
In step S302, the MPU 1 drives the aperture 2 by the aperture drive circuit 13 to the aperture value calculated in step S202 of FIG.
[0115]
In step S303, after performing the charge clear operation of the CCD 7, the MPU 1 starts charge accumulation in the CCD 7 in step S304, and proceeds to step S305.
[0116]
In step S305, the shutter drive circuit 17 drives the leading blade group 6a (not shown) in the mechanical shutter device 6 (the shutter is opened), and exposure of the CCD 7 is started (step S306).
[0117]
In step S307, the MPU 1 determines whether or not the exposure time of the CCD 7 calculated in step S202 of FIG. 6 has ended. If it is determined that the exposure has ended, the process proceeds to step S308.
[0118]
In step S308, the shutter drive circuit 17 drives the rear blade group 6b (not shown) in the mechanical shutter device 6 according to the instruction of the MPU 1, closes the shutter, and ends the exposure of the CCD 7.
[0119]
In step S309, the aperture driving circuit 13 drives the aperture 2 to the full aperture value, and the main mirror 4 and the sub mirror 5 are moved to the mirror down position by the mirror driving circuit 14 in step S310.
[0120]
In step S311, it is determined whether or not the set charge accumulation time has elapsed. If it is determined that it has elapsed, the process proceeds to step S312.
[0121]
In step S312, the MPU 1 ends the charge accumulation of the CCD 7, and then reads out a charge signal as an imaging signal from the CCD 7 in step S313.
[0122]
When the series of processes is completed, the process returns to FIG. 6, the photographing process routine step S204 is terminated, and the process proceeds to step S205.
[0123]
In step S205, it is determined whether or not the ISO bracketing flag set in step S106 of FIG. 5 is set. When the ISO bracketing flag is not set, the process proceeds to step S208, and an operation described later is performed.
[0124]
When the ISO bracketing flag is set, the process proceeds to step S206.
[0125]
In step S206, the MPU 1 checks the value of the variable N. If N = 0, the process proceeds to step S207, and the amount corresponding to the bracketing correction amount (gain adjustment amount) set in step S106 in FIG. The AGC 9 corrects the gain to the under side.
[0126]
If N = 1, the process proceeds to step S208, and the AGC 9 performs correction with a gain corresponding to the ISO value set in step S103 of FIG. 5 (ISO standard setting).
[0127]
If N = 2, the process proceeds to step S209, and the AGC 9 corrects the gain to the over side by an amount corresponding to the bracketing correction amount (gain adjustment amount) set in step S106 in FIG. 5 (ISO over setting). ).
[0128]
Next, in step S210, after performing predetermined image processing in the video signal processing circuit 11, compression processing is performed, and the process proceeds to step S211 and image data for displaying an image is transmitted to the LCD drive circuit 25. Then, the process proceeds to step 216, and after the photographing is completed, the process proceeds to step S217 in which the photographed image is displayed on the LCD monitor 120. In step S211, the memory controller 26 records the compressed data in the memory 28, and proceeds to step S212.
[0129]
In step S212, the MPU 1 checks the state of the ISO bracketing flag stored in the internal memory in the MPU 1. If the ISO bracketing flag is set, the process proceeds to step S213, and the ISO bracketing flag has been released. Then, a series of shooting is finished.
[0130]
In step S213, the MPU 1 sets N = N + 1 for the variable N, and proceeds to step S214.
[0131]
In step S214, the MPU 1 determines whether the variable N has reached N = 3. If it is determined that the variable N has not reached N = 3, the process returns to step S204 to perform the next shooting. If it is determined that N = 3 has been reached, the ISO bracketing execution flag is canceled in the next step S215, and shooting is terminated.
[0132]
Next, the image display after the ISO bracketing photographing will be described with reference to FIG.
[0133]
8A, 8B, and 8C are image displays after ISO bracketing shooting displayed on the LCD monitor 120, 201 is a captured image, 202 is recording image quality information (in this case, large / fine: (Recorded at F / L), 203 (Tv) is shutter time information, 204 (Av) is aperture value information, 205 is shooting date / time information, 206 is image processing parameter information, ISO value information and ISO bracket. Reference value information at the time of shooting, 207 indicates selected WB mode information, and 208 indicates correction amount information at the time of ISO bracketing shooting. FIG. 8A shows a photographed image photographed at minus one level (equivalent to ISO100) with respect to the reference value ISO200. The reference value is a normal photographed image and is displayed on the display unit that displays the ISO value, as in the normal photographed image. The reference value 200 set by the photographer by external input is displayed as the image processing parameter information ISO and the reference value 200, and the correction amount of minus one step is bracketed immediately next to the reference value display with a relative value of -1. The captured image and the correction amount with respect to the reference value are displayed at the same time so that they can be instantly identified, and the correspondence between the relative correction amount and the corrected change in the captured image is known. FIG. 8B shows a photographed image taken with a reference value (no correction amount). The ISO 200 is displayed as image processing parameter information and the reference value as in FIG. 8A, and ± 0 is displayed. Is displayed immediately next to the reference value display 208a so that it can be identified as a reference value photographed image of ISO bracketing photography. FIG. 8 (c) shows a photographed image photographed in a plus one step (equivalent to ISO 400) with respect to the reference value ISO200. FIG. 8 (a) and FIG. 8 (b) show image processing parameter information and reference values. The ISO 200 is displayed in the same manner as in the above, and the correction amount is displayed in a positive relative value of +1 so that the bracketing photographed image is immediately adjacent to the reference value 208b and the correction amount for the reference value can be instantly identified. The correspondence between the relative correction amount and the change in the captured image is corrected.
[0134]
Next, a setting method and photographed image display for WB (white balance) bracketing photographing will be described with reference to FIGS. 9 (a), (b), (c) and FIG.
[0135]
Note that the shooting method is the same as ISO bracketing shooting including the shooting flow, and is therefore omitted. FIG. 10 is a diagram showing a display form of the external liquid crystal display device 140A disposed on the back side, and 210 is a WB mode display, which displays icons (pictograms) such as an AWB mode, a fluorescent lamp mode, and a strobe mode. 211 is a recording image quality mode display, and 212 is a seven segment display for displaying a file number and a folder number. (Originally, only the selected mode is displayed)
When setting the WB bracketing shooting mode, when the WB mode selection button 125 is pressed, the previously selected mode of the WB mode 210 is displayed, and the vertical bar display at the center of the seven segment 212 and the horizontal bar display at the left and right of the vertical bar display. Are displayed three times each. By rotating the main electronic dial 115 in this state, the WB mode is sequentially selected and displayed for each click, and when the WB mode selection button 125 is depressed, the mode at that time is selected. Further, when the sub electronic dial 116 is rotated by one click while the WB mode selection button 125 is pressed, the right and left horizontal bars immediately adjacent to the center vertical bar display of the seven segment 212 are changed to a circle (◯) display and ± 1 step When the rotation is further rotated by one click, the circle (○) display moves to the left and right respectively, and is displayed as a correction amount of ± 2 steps. When the WB mode selection button 125 is not depressed, WB bracketing shooting is set. In this embodiment, the WB mode is set to AWB, the bracketing correction amount (gain adjustment amount) is set to ± 2 steps, and the correction amount setting of the white balance (WB) adjustment value is set to ± 3 steps.
[0136]
The correction amount is set to 100 Kelvin (corresponding to 5 mired of the color temperature conversion filter) with respect to the standard color temperature per stage, and minus (red) correction and plus (blue) correction are performed. FIGS. 9A, 9B, and 9C show the captured image display of the LCD monitor 120 after the WB bracketing shooting. The description of the same numbers is omitted, and only the portion related to the WB bracketing shooting image display is described. . FIG. 9A shows a photographed image photographed at minus 200 Kelvin with respect to the reference value, and the reference value is selected on the display unit that displays the selected WB mode as with the normal photographed image. AWB is displayed as an icon (pictogram). This is because the color temperature value automatically calculated by the camera is used as a reference value, and the photographer cannot determine what value even if the numerical value is displayed. Therefore, the color temperature automatically calculated by the camera is used as the reference for WB bracketing. An icon (pictogram) is displayed as a value so that the photographer can easily recognize it.
[0137]
The correction amount of minus 200 Kelvin is displayed as -2, and the fact that the WB was taken at minus 200 Kelvin is displayed immediately next to the reference value display as an absolute value, so that it is a bracketing photographed image and the correction amount instantly. It is possible to identify the color temperature change of the corrected captured image. FIG. 9B shows a photographed image taken with a reference value (no correction amount). The reference value is an AWB icon (pictogram) as in FIG. 9A, and ± 0 is the reference. The value is displayed immediately next to the value display 209a so that it can be identified as a reference value photographed image of WB bracketing photography.
[0138]
FIG. 9C shows a photographed image taken at a plus 200 Kelvin with respect to the reference value. The reference value displays an AWB as an icon (pictogram) as in FIGS. 9A and 9B. The plus 200 Kelvin correction amount is displayed as +2 and the WB is taken at plus 200 Kelvin as an absolute value, displayed immediately next to the reference value display 209b to instantly indicate that it is a bracketing image and the correction amount. The color temperature change of the captured image corrected so that it can be identified can be seen.
[0139]
In this embodiment, the correction amount is displayed as a one-digit numerical value so that the display is easy to see, but the same effect can be obtained by displaying the numerical value of the correction amount itself. Further, in the present embodiment, the description has been made with ISO bracketing imaging and WB bracketing imaging, but the present invention can also be applied to bracketing imaging with other image processing parameters changed.
[0140]
In addition, as a storage medium for storing a program for realizing the control method of the electronic camera in the present embodiment, for example, a magnetic disk such as FD, HD, CD-ROM, CD-R, an optical disk, a magneto-optical disk ( MO) or a non-volatile storage device such as a magnetic tape. However, the type of storage medium is not limited.
[0141]
  As explained above, the bookEmbodimentAccording to the present invention, in the bracketing shooting in which a plurality of frames are taken by correcting the value of at least one image processing parameter information for each shooting, the corrected image processing parameter information and its By displaying the correction amount information, it is possible to easily identify that the photographer is a bracketing photographed image. In addition, it is possible to easily identify which image processing parameter is a bracketing photographed image photographed with correction. Further, the correction amount and the captured image can be compared.
[0142]
  AlsoBecause the reference value set by the photographer's intention is displayed in the image processing parameter information, and the automatically set reference value that is difficult to understand even if the numerical value is displayed is not displayed. Is easy to understand.
[0143]
  furtherWhen the reference value is displayed in the correction amount information, it is displayed as a relative numerical value with respect to the reference value, so that the correction amount and the change in the image can be determined relatively, and the reference value is If it is not displayed, the correction amount is displayed as a set absolute value, so it can be determined by an absolute value image with the set correction value, so the image and the correction amount can be compared. Easy to do.
【The invention's effect】
  According to the present invention, it is possible to easily identify a bracketing photographed image, a reference value, and a correction value when confirming a photographed image after performing auto bracketing photographing.
[0144]
Further, since the correction value information is also displayed on the reference value photographed image, it can be determined that it is the reference value image of the bracketing photographed image, and the image comparison with the corrected image can be facilitated. In addition, since the image processing parameter information can also be used as the image processing parameter display at the time of normal photographing, the display device can be reduced in size and the like.
[Brief description of the drawings]
FIG. 1 is an external top view of a single-lens reflex electronic camera according to an embodiment of the present invention.
FIG. 2 is an external rear view of a single-lens reflex electronic camera according to an embodiment of the present invention.
FIG. 3 is a block diagram showing a configuration of a control system of a single-lens reflex electronic camera in an embodiment according to the present invention.
FIGS. 4A, 4B, and 4C are explanatory diagrams illustrating examples of images displayed on a top liquid crystal display unit of a single-lens reflex type electronic camera according to an embodiment of the present invention.
FIG. 5 is a flowchart showing an ISO bracketing setting operation of the single-lens reflex type electronic camera in the embodiment according to the invention.
FIG. 6 is a flowchart showing a sequence control operation in ISO bracketing photographing of the single-lens reflex type electronic camera in the embodiment according to the invention.
FIG. 7 is a flowchart showing a detailed control operation of photographing processing in step S204 of FIG.
FIG. 8 is an explanatory view showing a display example of an ISO bracketing photographed image of a single-lens reflex type electronic camera in an embodiment according to the present invention, and (a) is photographed in minus one step (equivalent to ISO100) with respect to a reference value ISO200. (B) is a display example of a photographed image photographed at a reference value (no correction amount), and (c) is photographed at one level (equivalent to ISO400) with respect to the reference value ISO200. Display example of captured image
FIGS. 9A, 9B, and 9C are explanatory diagrams illustrating display examples of a WB (white balance) bracketing photographed image of a single-lens reflex electronic camera according to an embodiment of the present invention.
FIG. 10 is an explanatory diagram showing an example of an image displayed on the rear liquid crystal display unit of the single-lens reflex type electronic camera in the embodiment according to the invention.
[Explanation of symbols]
1 Microcomputer (MPU)
2 Aperture
3 Penta prism (Pentagonal Dach prism)
4 Main mirror
5 Submirror
6 Mechanical shutter device
7 CCD
8 Clamp / CDS circuit
9 AGC (Automatic Gain Adjuster)
10 A / D converter
11 Video signal processing circuit
12 AF drive circuit
13 Aperture drive circuit
14 Mirror drive circuit
15 Focus detection sensor
16 Focus detection circuit
17 Shutter drive circuit
21 Switch sense circuit
22 Photometric sensor
23 Photometric circuit
24 Liquid crystal display drive circuit
25 LCD drive circuit
26 Memory controller
27 Buffer memory
28 memory
29 External interface
30 LCD in the viewfinder
31 Power supply
100 Camera body
114 Release button
115 Main electronic dial
116 Sub-electronic dial
117 Shooting mode selection button
118 AF mode selection button
119 Metering mode selection button
120 LCD monitor device
125 WB mode selection button
126 Recording quality selection button
140, 140A External liquid crystal display device
200 Photography lens

Claims (12)

For each shooting, auto bracketing is performed for a plurality of shootings in which a setting parameter of a specific type related to shooting is set to a reference value and a correction value corrected by a correction amount with respect to the reference value based on a single shooting instruction. Reading means for reading out the bracketing shot image shot in the shooting mode;
Together with the bracketing photographing image read by said reading means, and said classification of corrected set parameters by the auto bracketing photographing mode in the electronic camera at the time of shooting the bracketing photographing image, and the reference value, the A display control device comprising: a display control unit that controls to display the correction amount in association with each other at the same time . Wherein the display control unit, before if Kimoto a reference value photographer to set and display the previous SL reference value, if the previous Kimoto reference value is the electronic camera automatically sets the not to display the reference value controlling the display control device according to claim 1, wherein. It said display control means, display control apparatus according to claim 1 or 2, wherein the controller controls the correction amount in the hand table Shimesuru so the relative numbers against the reference value. The display control means may control, when bracketing photographing image to be displayed is photographed by the front Kimoto standard values, 1 through claim and controls to display the information indicating the absence of correcting the correction amount 4. The display control apparatus according to any one of items 3 . The type, the display control device according to any one of claims 1 to 4, characterized in that a white balance. The type, the display control device according to any one of claims 1 to 4, characterized in that a meter off. The display according to any one of claims 1 to 6, wherein the display control unit performs control to simultaneously display information on setting parameters relating to shooting other than the type of setting parameters in the auto bracketing shooting mode. Control device. The display control apparatus according to claim 1, wherein the display control unit controls the display unit to display only the single bracketing photographed image at the same time. The display control apparatus according to claim 1, wherein the display control unit is an electronic camera having an imaging unit. For each shooting, auto bracketing is performed for a plurality of shootings in which a setting parameter of a specific type related to shooting is set to a reference value and a correction value corrected by a correction amount with respect to the reference value based on a single shooting instruction. A reading step of reading out the bracketing shot image shot in the shooting mode;
The type of setting parameter corrected in the auto bracketing shooting mode when shooting the bracketing shooting image, the reference value, and the correction amount, together with the bracketing shooting image read in the reading step. And a display control step of controlling the display means to display them simultaneously in association with each other. A program that causes a computer to function as each unit of the display control device according to any one of claims 1 to 9. A computer-readable storage medium storing a program that causes a computer to function as each unit of the display control device according to any one of claims 1 to 9.

Images