CN1144446C - Digital camera adjustment system and adjustment device - Google Patents

Abstract

The invention relates to a digital camera adjustment device and adjustment system. This digital camera adjustment system consists of a digital camera and a digital camera adjustment device. Wherein, CCD is transformed into electrical signal by light from a luminophor and further transformed into digital signal via an A/D converter. A CPU of the digital camera calculates a proper gain, references an AWB evaluation value from an IPP under each lighting condition. A filter changeover device of the adjustment device selects a filter, calculates a proper gain for at least two colors, based on an AWB evaluation value from an IPP under each lighting condition, and sends a proper gain to the digital camera. The digital camera can properly reproduce white color, even if the color temperature of a light source is changed.

Description

Digital camera adjustment system and adjustment device

technical field

The present invention relates to a digital camera adjustment system and an adjustment device, in particular to a digital camera adjustment system and an adjustment device equipped with an automatic white balance (Auto White Balance, hereinafter abbreviated as AWB) function.

Background technique

Conventionally, in digital cameras, in order to obtain high-quality color images, it was necessary to adjust the white balance. If the white balance breaks down, when shooting a white subject, the photographed image will be colored. Not only that, but when taking a picture of a general subject, the color reproducibility is also poor, and it is difficult to obtain a high-quality image. reproduce the image.

If the color temperature of the light source changes, the white balance will change. Therefore, whenever a white (or achromatic) subject is photographed, the output ratio of the three primary color signals R, G, and B output as a photographic signal of a digital camera must be adjusted to 1: 1:1. This is called white balance adjustment, and this adjustment is generally carried out by adjusting the variable gain circuit arranged on the transmission line of each color signal.

Contents of the invention

However, in conventional digital cameras, there is a problem that white cannot be accurately reproduced when the temperature of the light source changes.

The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to provide a digital camera adjustment system and an adjustment device for adjusting a digital camera capable of accurately reproducing white even if the color temperature of a light source changes.

In order to achieve the above object, the present invention proposes a digital camera adjustment system, which consists of digital

A digital camera and a digital camera adjustment device for adjusting the digital camera are provided with a device for converting the subject light passing through an optical system into an electrical signal and outputting the electrical signal as a color image signal An imaging element, and an A/D converter for performing A/D conversion on the above-mentioned color image signal and outputting it as a digital color image signal; it is characterized in that the above-mentioned digital camera is also equipped with:

The white detection range setting device is used to set the color temperature range as the object of white balance adjustment;

An AWB evaluation device, for each color component (RGB) of the above-mentioned digital color image signal, output an AWB evaluation value corresponding to the luminance data of the above-mentioned each color component;

AWB adjustment device, used to adjust at least two color gains in the digital color image signal;

a storage device for storing suitable gain values under several lighting conditions;

The AWB control means calculates an appropriate gain value corresponding to the AWB evaluation value output from the AWB evaluation means within the color temperature range set by the white detection range setting means with reference to the appropriate gain value stored in the storage means, setting the gain of the above-mentioned AWB adjusting means;

The writing means writes the appropriate gain under each lighting condition sent from the digital camera adjusting means into the storage means.

The above-mentioned digital camera adjusting device is provided with:

lighting fixtures capable of illuminating light under certain lighting conditions;

an appropriate gain calculation device that accumulates the RGB automatic white balance evaluation values under each lighting condition of the above-mentioned lighting device, and calculates appropriate gains for at least two colors so that the ratio of the accumulated values falls within a predetermined value;

The sending device is used for sending the appropriate gain under each lighting condition to the above-mentioned digital camera.

The digital camera adjustment system according to the present invention is further characterized in that the illumination device switches filters with different optical characteristics to make illumination conditions different.

The digital camera adjustment system according to the present invention is further characterized in that the appropriate gain calculating means calculates integrated values ΣR, ΣG, and ΣB of the AWB evaluation values for each RGB, and calculates the ratio of the integrated values ΣR/ΣG and The R and B gains when ΣB/ΣG are within predetermined values are set as appropriate gains.

The digital camera adjustment system according to the present invention is further characterized in that it is provided with an AE control device for setting the AE function on or off.

The digital camera adjustment system according to the present invention is further characterized in that an AWB control device is provided for setting on or off of the AWB function.

According to the digital camera adjustment system of the present invention, it is also characterized in that the above-mentioned appropriate gain calculating means sets a predetermined number of adjustment times for calculating the appropriate gain, and when the number of adjustments exceeds the specified number of times and the appropriate gain cannot be obtained, it will report "digital gain". camera or environmental conditions are abnormal" message.

According to the digital camera adjustment system of the present invention, it is also characterized in that the above-mentioned appropriate gain calculation device sets a predetermined time for the adjustment time for calculating the appropriate gain, and when the adjustment time exceeds the specified time and the appropriate gain cannot be obtained, it will report "digital gain". camera or environmental conditions are abnormal" message.

In order to achieve the above object, the present invention also proposes a digital camera adjustment device for adjusting the digital camera, the above digital camera is provided with:

An imaging element that converts the subject light passing through the optical system into an electrical signal, and then outputs the electrical signal as a color image signal;

An A/D converter for performing A/D conversion on the above-mentioned color image signal and outputting it as a digital color image signal;

The white detection range setting device is used to set the color temperature range as the object of white balance adjustment;

An automatic white balance evaluation device, for each color component RGB of the above-mentioned digital color image signal, output an automatic white balance evaluation value corresponding to the brightness data of the above-mentioned various color components;

An automatic white balance adjustment device, used to adjust at least two color gains in the digital color image signal;

a storage device for storing suitable gain values under several lighting conditions;

The automatic white balance control device calculates the automatic white balance evaluation value output from the automatic white balance evaluation device within the color temperature range set by the white detection range setting device with reference to the appropriate gain value stored in the storage device. Set the gain of the above-mentioned automatic white balance adjustment device according to the appropriate gain value;

A writing device, for writing the appropriate gain under each lighting condition transmitted from the digital camera adjustment device into the storage device;

The digital camera adjustment device is characterized in that it is provided with:

lighting fixtures capable of illuminating light under certain lighting conditions;

an appropriate gain calculation device that accumulates the RGB automatic white balance evaluation values under each lighting condition of the above-mentioned lighting device, and calculates appropriate gains for at least two colors so that the ratio of the accumulated values falls within a predetermined value;

The sending means sends the appropriate gain under each lighting condition to the digital camera so as to be stored in the storage device of the digital camera.

The digital camera adjusting device according to the present invention is further characterized in that the lighting device switches filters with different optical characteristics to make lighting conditions different.

The digital camera adjustment device according to the present invention is further characterized in that the appropriate gain calculating means calculates the integrated values ΣR, ΣG, and ΣB of the AWB evaluation values for each RGB, and calculates the ratio of the integrated values ΣR/ΣG and The R and B gains when ΣB/ΣG are within predetermined values are set as appropriate gains.

The digital camera adjusting device according to the present invention is further characterized in that it is provided with an AE control device for setting on or off of the AE function.

According to the digital camera adjustment device of the present invention, it is further characterized in that it is provided with an AWB control device for setting the AWB function on or off.

According to the digital camera adjustment device of the present invention, it is also characterized in that the above-mentioned appropriate gain calculation means sets a predetermined number of adjustment times for calculating the appropriate gain. camera or environmental conditions are abnormal" message.

According to the digital camera adjustment device of the present invention, it is also characterized in that the above-mentioned appropriate gain calculation means sets a predetermined time for the adjustment time for calculating the appropriate gain, and when the adjustment time exceeds the predetermined time and the appropriate gain cannot be obtained, it will report "Digital camera or environmental conditions are abnormal" message.

Effects of the present invention will be described below.

According to the digital camera adjustment system and adjustment device of the present invention, it is possible to adjust a digital camera capable of accurately reproducing white even if the color temperature of a light source varies.

According to the digital camera adjustment system and adjustment device of the present invention, the lighting conditions can be easily changed.

According to the digital camera adjustment system and adjustment device of the present invention, it is possible to calculate an appropriate gain with high accuracy.

According to the digital camera adjustment system and adjustment device of the present invention, proper exposure can be obtained during AWB adjustment.

According to the digital camera adjustment system and adjustment device of the present invention, during AWB adjustment, the white balance state can be prevented from changing, and the white balance adjustment can be easily performed.

According to the digital camera adjustment system and adjustment device of the present invention, the operator can easily judge the abnormality of the digital camera or the environmental conditions.

Description of drawings

FIG. 1 is a block diagram of a digital camera according to an embodiment of the present invention;

Fig. 2 shows an example of the concrete constitution of the IPP of Fig. 1;

Fig. 3 is a diagram of the appearance and composition of a digital camera adjustment device according to an embodiment of the present invention;

Fig. 4 is a configuration diagram of a digital camera adjustment system related to an embodiment of the present invention;

Fig. 5 represents the computer configuration diagram of Fig. 3;

FIG. 6 shows a flow chart of the AWB adjustment processing sequence;

Fig. 7 is a "representation menu" diagram;

Figure 8 is a diagram of the "filter selection menu".

Detailed ways

A suitable embodiment of the digital camera adjustment system and the adjustment device according to the present invention will be described in detail below with reference to the accompanying drawings.

The digital camera involved in this embodiment is equipped with an AWB adjustment function, and its central processing unit (Central Processing Unit, hereinafter referred to as CPU) is used as an AWB control device according to the image information preprocessing part (Image Pre-Processor, hereinafter referred to as The AWB adjustment value of IPP) and the AWB evaluation value output by the white extraction setting circuit (AWB evaluation device) are calculated by referring to the appropriate gain value under each lighting condition that has been stored in the flash memory in the adjustment process. The appropriate gain value corresponding to the set color temperature range is set in the white balance adjustment part (AWB adjustment device) of the IPP to set the appropriate gain value calculated above to perform AWB control. In addition, the digital camera adjustment device calculates a corresponding appropriate gain based on the AWB evaluation value output from the IPP of the digital camera under each lighting condition. The appropriate gain is written into the flash memory of the digital camera. In this specification, a digital camera adjustment system refers to a system including the above-mentioned digital camera and a digital camera adjustment device.

First, the digital camera of this embodiment will be described.

Fig. 1 is a diagram showing the structure of a digital camera according to an embodiment of the present invention. In the figure, 100 represents a digital camera. -Coupled Device, hereinafter abbreviated as CCD) 103, correlated double sampling (Correlate Dual Sampling, hereinafter abbreviated as CDS) circuit 104, variable gain amplifier (AGC amplifier) 105, A/D converter 106, IPP 107, discrete Cosine Transformer (Discrete Cosine Transform, hereinafter abbreviated as DCT) 108, Encoder (Huffman Encoder/Decoder) 109, Memory Card Controller (Memory Card Controller, hereinafter abbreviated as MCC) 110, RAM (internal memory) 111, PC Card interface 112 , CPU 121 , display unit 122 , operation unit 123 , motor driver 125 , control signal generator (SG) unit 126 , flash 127 , battery 128 , DC-DC converter, and flash memory 130 constitute. In addition, it is connected with the detachable pc card 150 through the pc card interface 112 .

The lens unit is composed of a lens 101, a mechanical mechanism 102 including an auto focus (AF), aperture, and filter, and the mechanical shutter of the mechanical mechanism 102 simultaneously exposes two fields. The CCD 103 converts the input image into an electrical signal (analog image data) through a lens assembly. The CDS circuit 104 is a circuit for reducing noise of a CCD-type imaging element.

Also, the AGC amplifier 105 corrects the signal level of the correlated double-sampled signal by the CDS circuit 104 . The A/D converter 106 converts the analog image data input from the CCD 103 through the AGC amplifier into digital image data. That is, the output signal of the CCD 103 passes through the CDS circuit 104 and the AGC amplifier 105, and then is converted into a digital signal by the A/D converter 106 with the most suitable sampling frequency (such as an integer multiple of the subcarrier frequency of the NTSC signal).

In addition, the IPP 107, the DCT 108, and the encoder 109 perform various processes on the digital image data input from the A/D converter 106 in terms of color difference (cb, cr) and brightness (Y), correction, and image compression/extension. data processing. The so-called image compression/stretching data processing refers to performing, for example, the orthogonal transformation of the image compression/stretching process of the JPEG standard and the Huffman symbolization and complex numbering of the image compression/stretching process of the JPEG standard.

The MCC 110 temporarily stores the compressed image, records it to the PC card 150 through the PC card interface 112, or reads it out from the PC card 150.

The CPU 121 uses a RAM (not shown) as a work area according to a program stored in a ROM (not shown), and controls the above-mentioned digital digital system according to an instruction from the operation unit 123 or an external operation instruction such as a remote controller not shown. The whole action inside the camera. Specifically, the CPU 121 controls a photographing operation, an automatic exposure (AE) operation, an automatic white balance (AWB) adjustment operation, an AF operation, and the like. The CPU 121 can set ON/OFF of the AE function, the AWB function, and the AF function according to an instruction from the computer 207 of the digital camera adjustment device 200.

In addition, camera power is input from a battery 128, such as a nickel-cadmium, nickel-metal hydride, or lithium battery, to the DC-DC converter 129, and supplied to the inside of the digital camera.

The display unit 122 is realized by liquid crystal display, diode light emission, electroluminescence, etc., and displays the photographed digital image data and the recorded image data after elongation processing, and at the same time, the state of the digital camera, etc. . The operation unit 123 is provided with buttons for externally performing function selection, imaging instructions, and other various settings. Appropriate gain values under each lighting condition for performing AWB adjustment are written in the flash memory 130 .

The above-mentioned digital camera 100 is provided with a record mode for recording the image data obtained by shooting on the PC card 150, a display mode for displaying the image recorded on the PC card 150, and a digital camera adjustment device 200 to adjust Data is written in the recording/adjustment mode and the like in the flash memory 130 .

Fig. 2 shows an example of the specific structure of the above-mentioned IPP 107. The IPP 107 is provided with a color separation unit 1071 that separates the digital image data input from the A/D converter 106 into three primary colors R, G, and B components, and inserts the separated R and G components. - Signal insertion unit 1072 for each image data of B, redestal adjustment unit 1073 for adjusting black signal level of each image data for R, G, and B, white balance adjustment for adjusting white level of each image data for R and B part 1074, a digital gain adjustment part 1075 for correcting each image data of R·G·B with a gain set by the CPU 121, a gamma conversion part 1076 for performing r-transformation of each image data for R·G·B, The matrix conversion (matrix) unit 1077 that separates each image data of R, G, and B into color difference signals (cb, cr) and luminance signals (Y), and creates video signals from the color difference signals (cb, cr) and luminance signals (Y) It is output to the video signal processing unit 1078 of the display unit 122 .

The IPP 107 is also provided with a Y computing unit 1079 that detects the luminance data (Y) of each R, G, and B image data adjusted by the extinction pulse level adjustment unit 1073, and only allows the luminance data ( The BPF 1080 through which the predetermined frequency component of Y) passes, outputs the digital count value corresponding to the luminance data (Y) passing through the BPF 1080 as an AF evaluation value to the AF evaluation value circuit 1081 of the CPU 121, and detects the value through the Y calculation unit 1079. The digital count value corresponding to the obtained luminance data (Y) is output to the AE evaluation value circuit 1082 of the CPU 121 as an AE evaluation value, and detects the brightness of each R, G, and B image data after gain adjustment by the digital gain adjustment unit 1075. The Y operation part 1083 of the data (Y), the digital count value corresponding to the luminance data (Y) detected by the Y operation part 1083 is output to the AWB evaluation value circuit 1084 of the CPU 121 as an AWB evaluation value, and the CPU 121 interface CPU I/F 1085, and DCT I/F 1086 interfaced with DCT 108, etc.

The above-mentioned white balance adjustment unit 1074 has multipliers 1074r and 1074b for each of R and B, and multiplies the R and B gain data set by the CPU 121 by the R and B image data input to the multipliers 1074r and 1074b respectively. , to adjust the white balance of the image data. Also, the luminance range (white detection area) of the above-mentioned AWB evaluation value/white extraction setting circuit 1084 is set by the CPU 121.

The above-mentioned digital gain adjustment unit 1075 has multipliers 1075r, 1075g, and 1075b for each of R, G, and B, and compares the gain data of R, G, and B set by the CPU 121 with the gain data input to each of the multipliers 1075r, 1075g, and 1075b. The image data is multiplied and the signal level of the R·G·B image data is adjusted.

Next, the operation related to the AWB control in the above-mentioned digital camera 100 will be described.

The CPU 121 calculates the appropriate gain value under each lighting condition stored in the flash memory 130 within the color temperature range (white detection area) set as the target of white balance adjustment, and imports the AWB evaluation stored in the RAM from the IPP 107. The appropriate buff corresponding to the value. Next, the CPU 121 multiplies the captured image data by an appropriate gain to perform multiplication in the R and B multipliers 1074r and 1074b of the white balance adjustment unit 1074, adjusts the signal level of the image data, and performs AWB control.

Regarding the acquisition of the AWB evaluation value, there is a method of storing the AWB evaluation value in the acquisition (pre-scan) RAM before the normal shooting operation, and performing AWB control based on the AWB evaluation value during shooting, and a method of storing the AWB evaluation value during the normal shooting operation. The value is stored in the RAM, and the AWB control is performed based on the imported AWB evaluation value at the next shooting, either of the above-mentioned methods is acceptable.

Although only R·B is used to adjust the gain in the white balance adjustment unit 1074, the present invention is not limited thereto, and the gains of at least two combinations of R·G·B can be adjusted.

FIG. 3 shows an external configuration diagram of a digital camera adjustment device 200 according to this embodiment, and FIG. 4 is a block configuration diagram of a digital camera adjustment system 300 composed of the digital camera 100 and the digital camera adjustment device 200 .

The digital camera adjusting device 200 shown in FIG. 3 and FIG. 4 is provided with: a digital camera supply power supply 201 for supplying power to the digital camera 100, and is used to connect a general-purpose interface bus to the digital camera supply power supply 201 (General- PurposeInterface Bus, hereinafter abbreviated as GPIB), the adapter 202 controlled by the digital camera 100, the monitor 203 displaying the image taken by the digital camera 100, and the vector displaying the amplitude and phase of the color signal (RGB) scanned by the digital camera 100 Display 204, waveform monitor 205 for observing the video signal of monitor 203, screen-type gray scale light source 206, computer for controlling digital camera 100 and the above detectors (vector display 204, waveform monitor 205, etc.) 207, the display device of the computer 207, the display 208 indicating the adjustment menu, etc., the GPIBI/F 209 installed in the computer 207 body, the fixed digital camera 100, the power supply 201 for digital camera supply, RS-232C, video and other signals The connected adjustment fixture body 210, the filter switching device 212 for switching filters (W4, C10, C4, W16, etc.), controls the filter switching of the filter switching device 212 according to the instructions from the computer 207 Box 211. Furthermore, an illumination device is constituted by the light source 206 and the filter switching device 212 .

Fig. 5 shows the composition of above-mentioned computer 207, and it is provided with the input unit 2071 that gives operation instruction, CPU 2072 that controls computer device whole, stores the ROM 2073 of various control programs that make above-mentioned 2072 operate, uses as the working area of CPU 2072. RAM 2074.

The control program includes, for example, an adjustment data creation program for writing adjustment data such as appropriate gain data under various lighting conditions into the flash memory 130 of the digital camera 100 .

Next, the procedure of the AWB adjustment process performed in cooperation by the digital camera 100 and the digital camera adjustment device 200 will be described with reference to the flowchart shown in FIG. 6 .

In this AWB adjustment, the screen-type gray scale is set on the light source 206 (5100K), and the light source 206 is changed by switching different characteristic filters (W4, C10, C4, W16, etc.) Lighting conditions, calculate AWB adjustment data.

First, as shown in FIG. 5 , install the digital camera 100 on the jig body 210 of the digital camera adjustment device 200, turn on the power supplies of the digital camera 100 and the digital camera adjustment device 200, and carry out digital camera 100 and digital camera adjustment. In the initialization process of the camera adjustment device 200 (step S1, P1), the "display menu" in FIG. 7 is displayed on the display 208 (step S2). In addition, an adjustment and recording mode is set in the digital camera 100 (step P2).

Next, if AWB adjustment (step S3) is selected from the "display menu" screen (see FIG. 7) of the display 208 in the digital camera adjustment device 200 (step S3), the "filter selection menu" screen shown in FIG. Screen selection filter (step S4). The CPU 2072 of the computer 207 switches the optical filter of the light source 206 to the selected optical filter through the control box 211 (step S5).

Subsequently, the CPU 2072 of the computer 207 sends an instruction indicating start of AWB adjustment to the CPU 121 of the digital camera 100 via the RS 232C cable (step P3). And, the value of the counter K is set to an initial value "0" (step S7).

The CPU 121 of the digital camera 100 receives the above instruction (step P3), and when the AF function and the AE function are set to ON and the AWB function is set to OFF, the multipliers 1074r, 1074b of the white balance adjustment circuit 1074 Set the initial values of the R and B gains respectively, and start shooting (step P4).

When shooting, the AWB evaluation value circuit 1084 of the IPP outputs the AWB evaluation values of R, G, and B within the set brightness range (white detection area) to the CPU 121, and the CPU 121 sends these AWB evaluation values of R, G, and B to the CPU 121. The computer 207 of the device 200 is adjusted to the digital camera (step P5).

The CPU 2072 of the computer 207 receives the AWB evaluation values of R, G, and B, and calculates ΣR, ΣG, and ΣB of R, G, and B respectively (step S8). Next, the CPU 2072 calculates ΣR/ΣG, ΣB/ΣG (step S9), and increments the value of the counter K by 1 (step S10).

Subsequently, the CPU 2072 judges whether ΣR/ΣG and ΣB/ΣG are within the specified value (near 1) (step S11), and when ΣR/ΣG and ΣB/ΣG are within the specified value, the The R and B gains at this time are sent to the CPU 121 of the digital camera as the AWB adjustment gain (step S12). The CPU 121 of the digital camera 100 receives the AWB adjustment gains of R and B, and stores them in the flash memory 130 (step P6).

On the other hand, in step S11, when ΣR/ΣG and ΣB/ΣG are not in the specified value, then move to step S13, judge the value of the counter K, that is, whether the number of times of adjustment is more than the specified number of times N, When K>N, it is judged that the digital camera or the environmental conditions are abnormal, and the information is displayed on the display 208 to notify the operator (step S15).

And when K is not greater than N, then move to step S14, change R, B gain, make ΣR/ΣG and ΣB/ΣG become close to 1, the calculated R, B gain and should be photographed again The instruction is sent to the CPU 2072 of the digital camera (step S14). The CPU 121 of the digital camera 100 sets the calculated R and B gains in the multipliers 1074r and 1074b of the white balance adjustment circuit 1074, performs shooting (step P4), and sends the AWB evaluation value again (step P5). And, after calculating ΣR, ΣG, ΣB respectively (step S8), the CPU 2072 of the computer calculates ΣR/ΣG, ΣB/ΣG (step S9), and increases the value of the counter k by 1 (step S10 ), repeat the above processing (steps S14, P4, P5, S8, S9, S10, S11, S13) within the specified number of times N, until ΣR/ΣG and ΣB/ΣG are within the above-mentioned specified values.

The above processing (steps S4-S14, P3-P6) is performed on each filter W4, C10, C4, W16, and the AWB adjustment gain under each lighting condition is stored in the flash memory 130.

In the above processing, when the number of adjustments is greater than the predetermined number, it is determined that the digital camera or the environmental conditions are abnormal, and the content is displayed on the display 208 to notify the operator. However, it may also be set so that when the adjustment time exceeds a predetermined time, it is determined that the digital camera or the environmental condition is abnormal.

As mentioned above, in the digital camera adjustment system 300 of this embodiment, the CCD 103 of the digital camera converts the subject light passing through the lens assembly 101 into an electrical signal, and outputs it as a color image signal, and the A/D converter 106 performs A/D conversion on the color image signal to become a digital color image signal output, and the IPP 107 outputs the AWB evaluation value corresponding to the luminance data of each color component (RGB) of the digital color image signal, and the CPU 121 refers to the value stored in the flash memory For the appropriate gain value under each lighting condition in 130, calculate the appropriate gain value corresponding to the AWB evaluation value output from IPP 107 within the set color temperature range, set the above-mentioned calculated appropriate gain in the white balance adjustment part 1074, and perform AWB adjustment; on the other hand, in the digital camera adjustment device 200 of the present embodiment, the filter switching device 212 switches the filter to make the lighting conditions of the light source 206 different, and from the digital camera 100 according to each lighting condition The AWB evaluation value of RGB output by IPP 107 calculates the appropriate gains of at least two colors, sends a letter to the digital camera 100 with the appropriate gains under each lighting condition, and writes the above-mentioned appropriate gains into the flash memory of the digital camera 100; therefore, Even if the color temperature of the light source varies, digital cameras can properly reproduce white.

In this embodiment, the filter switching device 212 switches filters with different optical characteristics to make the lighting conditions of the light source 206 different, so the lighting conditions can be easily changed.

In this embodiment, the integrated values ΣR, ΣG, and ΣB of the AWB evaluation values are calculated for each RGB, and the ratios of the integrated values ΣR/ΣG and ΣB/ΣG are within predetermined values for R and B.

Since the gain is set as an appropriate gain, an appropriate gain with high accuracy can be obtained.

In this embodiment, the AE function of the digital camera 100 is turned on during the AWB adjustment, so that an appropriate exposure can be obtained during the AWB adjustment.

In this embodiment, the AWB function of the digital camera 100 is turned off during the AWB adjustment, so that the white balance state can be prevented from changing during the AWB adjustment, and the white balance adjustment can be easily performed.

In this embodiment, during AWB adjustment, a specified number of times is set for the number of adjustments to calculate the appropriate gain. When the number of adjustments exceeds the specified number of times and the appropriate gain cannot be obtained, the message "the digital camera or the environmental condition is abnormal" will be reported. , therefore, the operator can easily judge that "the digital camera or the environmental conditions are abnormal".

In this embodiment, during AWB adjustment, a specified time is set for the adjustment time for calculating the appropriate gain, and when the adjustment time exceeds the specified time and the appropriate gain cannot be obtained, the information of "the digital camera or the environmental condition is abnormal" will be reported. , therefore, the operator can easily judge that "the digital camera or the environmental conditions are abnormal".

Claims (34)

1. digital camera regulating system, the digital camera adjusting device of being adjusted this digital camera by digital camera and being used to constitutes, above-mentioned digital camera be provided with the subject light by optical system be transformed into the signal of telecommunication, again with the imaging apparatus of this signal of telecommunication as color picture signal output, and to above-mentioned color picture signal carry out the A/D conversion, as the A/D converter of digital color image signal output; It is characterized in that:

Above-mentioned digital camera also is provided with:

White detection range setting device is used to set the reference color temperature of adjusting object as white balance;

The Automatic white balance evaluating apparatus, for the composition RGB of all kinds of above-mentioned digital color image signal, the corresponding Automatic white balance evaluation of estimate of brightness data of output and above-mentioned composition of all kinds;

The Automatic white balance adjusting device is used for adjusting above-mentioned digital color image signal at least two looks gain;

Storage device is used to store the suitable yield value under the some kinds of lighting conditions;

The Automatic white balance control device, with reference to the above-mentioned suitable yield value that is stored in the above-mentioned storage device, in the reference color temperature that above-mentioned white detection range setting device is set, calculate and the corresponding suitable yield value of exporting from above-mentioned Automatic white balance evaluating apparatus of Automatic white balance evaluation of estimate, set the gain of above-mentioned Automatic white balance adjusting device;

Writing station will write the above-mentioned storage device from the suitable gain under each lighting condition that above-mentioned digital camera adjusting device sends;

Above-mentioned digital camera adjusting device is provided with:

Can be under some lighting conditions the lighting device of irradiates light;

Suitable gain calculating machinery is accumulated at the Automatic white balance evaluation of estimate of the above-mentioned RGB under each lighting condition of above-mentioned lighting device, and the suitable gain of calculating at least two looks makes the ratio of aggregate-value become in setting;

The device of delivering letters is used for the suitable gain under above-mentioned each lighting condition is sent to above-mentioned digital camera.

2. according to the digital camera regulating system described in the claim 1, it is characterized in that the different filter of above-mentioned lighting device switchable optics characteristic makes the lighting condition difference.

3. according to the digital camera regulating system described in claim 1 or 2, it is characterized in that, above-mentioned suitable gain calculating machinery calculates aggregate-value ∑ R, ∑ G, the ∑ B of Automatic white balance evaluation of estimate to each RGB, and R, the B gain when becoming the ratio ∑ R/ ∑ G of aggregate-value and ∑ B/ ∑ G in the setting is made as suitable gain.

4. according to the digital camera regulating system described in claim 1 or 2, it is characterized in that, be provided with the AE control device, be used to set being switched on or switched off of AE function.

5. according to the digital camera regulating system described in the claim 3, it is characterized in that, be provided with the AE control device, be used to set being switched on or switched off of AE function.

6. according to any described digital camera regulating system in the claim 1,2,5, it is characterized in that, be provided with the Automatic white balance control device, be used to set being switched on or switched off of Automatic white balance function.

7. according to the digital camera regulating system described in the claim 3, it is characterized in that, be provided with the Automatic white balance control device, be used to set being switched on or switched off of Automatic white balance function.

8. according to the digital camera regulating system described in the claim 4, it is characterized in that, be provided with the Automatic white balance control device, be used to set being switched on or switched off of Automatic white balance function.

9. according to any described digital camera regulating system in the claim 1,2,5,7,8, it is characterized in that, above-mentioned suitable gain calculating machinery is set stipulated number for the adjustment number of times that calculates suitable gain, when the adjustment number of times can't obtain suitable gain above this stipulated number, report the information of " digital camera or environmental condition are for unusual ".

10. according to the digital camera regulating system described in the claim 3, it is characterized in that, above-mentioned suitable gain calculating machinery is set stipulated number for the adjustment number of times that calculates suitable gain, when the adjustment number of times can't obtain suitable gain above this stipulated number, report the information of " digital camera or environmental condition are for unusual ".

11. according to the digital camera regulating system described in the claim 4, it is characterized in that, above-mentioned suitable gain calculating machinery is set stipulated number for the adjustment number of times that calculates suitable gain, when the adjustment number of times can't obtain suitable gain above this stipulated number, report the information of " digital camera or environmental condition are for unusual ".

12. according to the digital camera regulating system described in the claim 6, it is characterized in that, above-mentioned suitable gain calculating machinery is set stipulated number for the adjustment number of times that calculates suitable gain, when the adjustment number of times can't obtain suitable gain above this stipulated number, report the information of " digital camera or environmental condition are for unusual ".

13. according to any described digital camera regulating system among claim 1,2,5,7,8, the 10-12, it is characterized in that, above-mentioned suitable gain calculating machinery is for the adjustment time set stipulated time of calculating suitable gain, when the adjustment time can't obtain suitable gain above this stipulated time, report the information of " digital camera or environmental condition are for unusual ".

14. according to the digital camera regulating system described in the claim 3, it is characterized in that, above-mentioned suitable gain calculating machinery is for the adjustment time set stipulated time of calculating suitable gain, when the adjustment time can't obtain suitable gain above this stipulated time, report the information of " digital camera or environmental condition are for unusual ".

15. according to the digital camera regulating system described in the claim 4, it is characterized in that, above-mentioned suitable gain calculating machinery is for the adjustment time set stipulated time of calculating suitable gain, when the adjustment time can't obtain suitable gain above this stipulated time, report the information of " digital camera or environmental condition are for unusual ".

16. according to the digital camera regulating system described in the claim 6, it is characterized in that, above-mentioned suitable gain calculating machinery is for the adjustment time set stipulated time of calculating suitable gain, when the adjustment time can't obtain suitable gain above this stipulated time, report the information of " digital camera or environmental condition are for unusual ".

17. according to the digital camera regulating system described in the claim 9, it is characterized in that, above-mentioned suitable gain calculating machinery is for the adjustment time set stipulated time of calculating suitable gain, when the adjustment time can't obtain suitable gain above this stipulated time, report the information of " digital camera or environmental condition are for unusual ".

18. a digital camera adjusting device is used to adjust digital camera, above-mentioned digital camera is provided with:

The imaging apparatus of to be transformed into the signal of telecommunication by the subject light of optical system, again this signal of telecommunication being exported as color picture signal;

To above-mentioned color picture signal carry out the A/D conversion, as the A/D converter of digital color image signal output;

White detection range setting device is used to set the reference color temperature of adjusting object as white balance;

The Automatic white balance evaluating apparatus, for the composition RGB of all kinds of above-mentioned digital color image signal, the corresponding Automatic white balance evaluation of estimate of brightness data of output and above-mentioned composition of all kinds;

The Automatic white balance adjusting device is used for adjusting above-mentioned digital color image signal at least two looks gain;

Storage device is used to store the suitable yield value under the some kinds of lighting conditions;

The Automatic white balance control device, with reference to the above-mentioned suitable yield value that is stored in the above-mentioned storage device, in the reference color temperature that above-mentioned white detection range setting device is set, calculate and the corresponding suitable yield value of exporting from above-mentioned Automatic white balance evaluating apparatus of Automatic white balance evaluation of estimate, set the gain of above-mentioned Automatic white balance adjusting device;

Writing station will write the above-mentioned storage device from the suitable gain under each lighting condition that above-mentioned digital camera adjusting device sends;

This digital camera adjusting device is characterised in that, is provided with:

Can be under some lighting conditions the lighting device of irradiates light;

Suitable gain calculating machinery is accumulated at the Automatic white balance evaluation of estimate of the above-mentioned RGB under each lighting condition of above-mentioned lighting device, and the suitable gain of calculating at least two looks makes the ratio of aggregate-value become in setting;

The device of delivering letters is sent to above-mentioned digital camera with the suitable gain under above-mentioned each lighting condition, so that be stored in the storage device of above-mentioned digital camera.

19. the digital camera adjusting device according to described in the claim 18 is characterized in that, the different filter of above-mentioned lighting device switchable optics characteristic makes the lighting condition difference.

20. according to the digital camera adjusting device described in claim 18 or 19, it is characterized in that, above-mentioned suitable gain calculating machinery calculates aggregate-value ∑ R, ∑ G, the ∑ B of Automatic white balance evaluation of estimate to each RGB, and R, the B gain when becoming the ratio ∑ R/ ∑ G of aggregate-value and ∑ B/ ∑ G in the setting is made as suitable gain.

21. the digital camera adjusting device according to described in claim 18 or 19 is characterized in that, is provided with the AE control device, is used to set being switched on or switched off of AE function.

22. the digital camera adjusting device according to described in the claim 20 is characterized in that, is provided with the AE control device, is used to set being switched on or switched off of AE function.

23., it is characterized in that according to any described digital camera adjusting device in the claim 18,19,22, be provided with the Automatic white balance control device, be used to set being switched on or switched off of Automatic white balance function.

24. the digital camera adjusting device according to described in the claim 20 is characterized in that, is provided with the Automatic white balance control device, is used to set being switched on or switched off of Automatic white balance function.

25. the digital camera adjusting device according to described in the claim 21 is characterized in that, is provided with the Automatic white balance control device, is used to set being switched on or switched off of Automatic white balance function.

26. according to any described digital camera adjusting device in the claim 18,19,22,24,25, it is characterized in that, above-mentioned suitable gain calculating machinery is set stipulated number for the adjustment number of times that calculates suitable gain, when the adjustment number of times can't obtain suitable gain above this stipulated number, report the information of " digital camera or environmental condition are for unusual ".

27. according to the digital camera adjusting device described in the claim 20, it is characterized in that, above-mentioned suitable gain calculating machinery is set stipulated number for the adjustment number of times that calculates suitable gain, when the adjustment number of times can't obtain suitable gain above this stipulated number, report the information of " digital camera or environmental condition are for unusual ".

28. according to the digital camera adjusting device described in the claim 21, it is characterized in that, above-mentioned suitable gain calculating machinery is set stipulated number for the adjustment number of times that calculates suitable gain, when the adjustment number of times can't obtain suitable gain above this stipulated number, report the information of " digital camera or environmental condition are for unusual ".

29. according to the digital camera adjusting device described in the claim 23, it is characterized in that, above-mentioned suitable gain calculating machinery is set stipulated number for the adjustment number of times that calculates suitable gain, when the adjustment number of times can't obtain suitable gain above this stipulated number, report the information of " digital camera or environmental condition are for unusual ".

30. according to any described digital camera adjusting device among claim 18,19,22,24,25, the 27-29, it is characterized in that, above-mentioned suitable gain calculating machinery is for the adjustment time set stipulated time of calculating suitable gain, when the adjustment time can't obtain suitable gain above this stipulated time, report the information of " digital camera or environmental condition are for unusual ".

31. according to the digital camera adjusting device described in the claim 20, it is characterized in that, above-mentioned suitable gain calculating machinery is for the adjustment time set stipulated time of calculating suitable gain, when the adjustment time can't obtain suitable gain above this stipulated time, report the information of " digital camera or environmental condition are for unusual ".

32. according to the digital camera adjusting device described in the claim 21, it is characterized in that, above-mentioned suitable gain calculating machinery is for the adjustment time set stipulated time of calculating suitable gain, when the adjustment time can't obtain suitable gain above this stipulated time, report the information of " digital camera or environmental condition are for unusual ".

33. according to the digital camera adjusting device described in the claim 23, it is characterized in that, above-mentioned suitable gain calculating machinery is for the adjustment time set stipulated time of calculating suitable gain, when the adjustment time can't obtain suitable gain above this stipulated time, report the information of " digital camera or environmental condition are for unusual ".

34. according to the digital camera adjusting device described in the claim 26, it is characterized in that, above-mentioned suitable gain calculating machinery is for the adjustment time set stipulated time of calculating suitable gain, when the adjustment time can't obtain suitable gain above this stipulated time, report the information of " digital camera or environmental condition are for unusual ".

Images