JPH07274194A - Color video signal processor - Google Patents

Abstract

PURPOSE:To execute angle adjustment and sure color correction through the use of chroma data concerning TV camera by fetching in a memory a chroma video in a standard color by turning into video data. CONSTITUTION:A monotone background 101, a standard chroma 102 arranged in a part of it and a human body 103 are objects. A color TV camera 104 picks up the image of the standard chroma 102 and the human body object 103, and an A/D converter 105 digital-converts it. This image data is stored in the memory 106. At the time of receiving a color correction command made by the operation of a keyboard 111 by way of a controller 110, a chroma detection processor 109 extracts picture data (chroma data) of a specified area from the memory 106. In order that this piece of chroma data shows a specified color, a color conversion table is used so as to color-correct picture data of the whole picture to store in a processed data area in the memory 106. On the other hand, when data of a chroma part does not exist within the specified area, a warning letters generation display part 112 and a warning sound generation part 113 warn an operator.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color video signal processing device which can be used for color adjustment of an image, and particularly for color adjustment of a person image of an ID card.

[0002]

2. Description of the Related Art When a color image is reproduced by using a color image signal obtained by capturing a color image with a color image pickup device such as a color TV camera (color television camera), an output device (output medium) used for the reproduction. The result is a different shade. For example, when the output device is a color display, the color development differs depending on the phosphor or color filter of the display, and in the case of a color printer, the color development differs depending on the color ink or color toner used.

Further, the color tone of the reproduced image differs depending on the color image pickup device used for the same subject, and even if the same subject is imaged by the same color image pickup device, the color tone varies depending on the illumination light of the subject. come.

Therefore, there is a need for an apparatus capable of performing color correction of a color video signal corresponding to an output medium and outputting an optimum color image. As such a device, for example, a device disclosed in Japanese Patent Laid-Open No. 5-103336 is known.

This device uses a color chart of a standard color, a photographing means for photographing a subject including the color chart to obtain a color video signal, and a color video signal obtained by the photographing means as digital data. Means for converting the data of the color chart portion based on the digitalized video signal, and setting a color conversion table having color correction characteristics in which the data value of the color chart portion is a target value. By using this, the image signal converted into digital data is subjected to data conversion to perform color correction and output, and processing means is provided.

The color chart is a color sheet for color adjustment using standard colors, and this apparatus uses the color chart to obtain a video signal in which the color chart is imaged in a part of the target image. Then, the video signal is converted into digital data, the data of the color chart part is extracted from the data of the video signal, and a color conversion table having a color correction characteristic for converting the data value of the color chart part to a target value is set. . Then, color conversion adjustment processing is performed on the data of the video signal using the color conversion table, and color adjustment of the entire image is performed.

If the color conversion table is set in consideration of the color characteristics of the output device, not only the color of the color chart part can be reproduced on the output device in the same color as the actual color chart, but also the image pickup apparatus and It becomes possible to reproduce the color of the reproduced image in the original color in response to changes in shooting conditions such as lighting.

By performing such color adjustment, the optimum color adjustment can be made for each image even if the shooting conditions such as the image pickup device and the illumination are changed, and therefore, the output target is selected. Accordingly, it is possible to obtain a color image that is optimally color-corrected.

[0009]

Although there is a device for performing color correction of a color video signal corresponding to an output medium and outputting it as an optimum color image, the conventional technique uses a standard color for color adjustment. Using a vote, a video signal obtained by copying this into a part of the target image is obtained, and this video signal is converted into digital data, and the data of the color patch portion is extracted from the data of this video signal, and this color patch The color adjustment of the entire image is performed by performing the conversion adjustment processing on the data of the video signal using the color conversion table having the color correction characteristic for converting the data value of the part to the target value.

By the way, in carrying out this processing, unless a method of manually specifying a color chart position on an image is adopted,
The color chart position is automatically searched for, and the color adjustment is performed using the data. However, whether or not the color chart imprinted for color adjustment exists in the target image is determined by scanning all the image data in the target image and determining, for example, that the color image data presenting the same color has a specific shape. I do not know unless I check if there is a distributed area that is clogged in the range,
Even if the color chart is imprinted in the image, if the position of the color chart part is mistakenly recognized, image data other than the color chart may be recognized as a color chart and the color may be corrected. With this, an optimum color image cannot be reproduced. Therefore, an additional function for checking such erroneous recognition must be newly provided, which makes the system very complicated.

Therefore, the object of the present invention is to overcome this problem and provide a color image signal processing apparatus capable of easily recognizing color chart data for color adjustment and performing optimum color adjustment. To do.

[0012]

In order to achieve the above object, the present invention is as follows. That is, a color image obtained by correcting the data of an image in which a color chart is imaged together with a subject so that the display color of the color chart becomes a target color and obtaining an image in a desired color state. In the signal processing device, a background having a uniform color, a color chart composed of standard colors, a photographing means for photographing a subject including the background and the color chart, and obtaining a color video signal, Digital conversion means for digitally converting the color video signal obtained by the photographing means into image data, an image memory for storing the converted image data, and data of the color chart part from the image data of the image memory. , A detection means for detecting whether or not it exists in a designated area in the image memory, and when the data of the color chart part does not exist in the designated area in the image memory, a warning is generated. And and a warning generating means, characterized in that configuration.

Thirdly, the data of the image in which the color chart is imaged together with the subject is corrected so that the display color of the color chart becomes the target color, and the image in the desired color state is corrected. In a color image signal processing device that is designed to obtain
A background having a uniform color, a color chart composed of standard colors, a photographing means for photographing a subject including the background and the color chart to obtain a color video signal, and a photographing means for obtaining the color video signal. A digital converting means for digitally converting the color video signal into image data, an image memory for storing the converted image data, an image data of the image memory is read out and converted into a video signal, and Of the image data on the image memory, a control unit that superimposes a signal that displays a marker indicating a color chart arrangement position on a designated screen region, an image display unit that displays an image by receiving a video signal from the control unit, , The image data of the designated position corresponding to the screen area is used as the data of the color chart part, and data conversion is performed so that the color of the display image by the data becomes a desired color. And configure and a processor.

[0014]

In the case of the first configuration, the color image for color adjustment using the standard color is used, and the color image signal obtained by copying this into the part of the target image is obtained. Then, this color video signal is digitally converted into image data, which is stored in the image memory. Then, it is detected from the image data whether the data of the color chart part is within a designated area of the image memory, and if the data of the color chart portion does not exist at the designated position of the image memory, a warning is generated. A warning is generated by means.

Therefore, whether or not the image data stored in the image memory is an image in which the color chart is also copied can be surely confirmed at the time of capturing the image, and not only the angle adjustment of the color TV camera is easy, but also the color There is no color chart misidentification in the adjustment, and the image data at the planned position becomes the color chart data. Therefore, with the simple system configuration, it is possible to perform reliable color correction using the color chart data. .

In the case of the second configuration, a color chart for color adjustment using standard colors is used, and a color video signal obtained by copying this into a part of the target image is obtained, and this color video signal is digitally displayed. The image data is converted into image data, and this image data is expanded on the image memory. Then, difference filtering is performed on the image data in the designated area on the image memory, and the difference is compared with a preset threshold value. At that time, when the value calculated by the difference is larger than the threshold value, it is determined that the color chart is not captured in the designated area on the image memory, and the signal for issuing a warning is transferred to the warning generating means.

Therefore, the process of detecting the color chart in the designated area of the image memory can be easily performed. In the case of the third configuration, the imprinting position of the color chart in the image is set in advance, and the image data at this position is recognized as the image data of the color chart on the image memory holding the image, and the color chart data is recognized. The image data values of the entire image are color-corrected so that the target color is the target color. Further, when displaying the image on the display screen of the image display means for monitoring the captured image, it is possible to display a marker indicating the region of the imprint position of the color patch so that the color patch comes to this marker position. Then, color correction using a color chart can be performed.

According to this, if the angle of the photographing means is adjusted so that the imprinting position of the color chart becomes the proper position while observing the monitor image, correct color correction using the data of the color chart becomes possible. Therefore, with a simple structure, it is possible to reliably imprint the color chart, and moreover, it is possible to recognize the data of the color chart without error, and therefore, it is possible to obtain the effect that correct color correction can be performed.

[0019]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the system configuration of the first embodiment of the present invention. In FIG. 1, 101 is a monotone background, 102 is a color chart composed of standard colors, and 103 is a person. These are the subjects. For the color chart 102, a standard color paint is applied to a square sheet or a square plate, a material of the plate is mixed with a pigment of that color to develop the color, or the color sheet of that color is applied as it is or attached to the plate. It is configured by arranging it so that it is placed in a part of the background and is imprinted with the subject.

Reference numeral 104 denotes a color T as a color image pickup device.
It is a V camera, which obtains a color image signal by imaging a subject. An A / D converter 105 converts an analog signal into a digital signal, and converts a color image signal output from the color TV camera 104 into a digital signal and outputs the digital signal.

Reference numeral 106 denotes a frame memory (image memory) for storing the digital signal from the A / D converter 105 as image data, and a color unadjusted image data storage area for storing image data of unadjusted color. , And a color-adjusted image data storage area for storing color-adjusted image data. Further, 107 is a D / A converter for converting the image data (digital signal) stored in the frame memory 106 into an analog video signal.
Reference numeral 8 denotes a color image display unit for displaying the output signal (video signal) from the D / A converter 107 as an image (visualized image).

Reference numeral 109 is a processing for detecting a standard color chart from the image data recorded in a specific area in the color unadjusted image data storage area of the frame memory 106, and the controller 111 is operated by operating the keyboard 111. When a color conversion command (color correction command) is received via 110, the detected color chart image data is used as color chart data, and a color conversion table that causes the color chart data to exhibit a predetermined color is displayed. With use, controller 11
Image data of 0 is transferred by performing a read control of the image data recorded in the color unadjusted image data storage area of the frame memory 106, and is converted by the color conversion table. Is a processor that performs processing such as data conversion (color correction). Note that the processor 109
The image data subjected to the data conversion processing (image data after color adjustment) is stored in the processed image data storage area of the frame memory 106 under the control of the controller 110. A color conversion table is prepared in the processor 109.

Reference numeral 110 is a controller for controlling the entire system, and reference numeral 111 is a keyboard for an operator (operator) to input data and instructions to the system. The controller 110 controls to store the image data in the color unadjusted image data storage area of the frame memory 106 while reading the image data from the color TV camera 104, read the image data and display it on the image display unit 108. After receiving the color conversion command and performing the color adjustment, the color adjusted image data is stored in the frame memory 1
Control is performed so that the image is read from 06 and displayed on the image display unit 108.

Reference numeral 112 denotes a character display unit for displaying a warning as a character when the processor 109 cannot detect a color chart, and the display is controlled by the controller 110 which receives the processing result of the processor 109.

Reference numeral 113 denotes a warning sound generation section for generating a warning sound when the processor 109 cannot detect a color chart, and the warning sound generation control is performed by the controller 110 which receives the processing result of the processor 109. When a color chart can be detected by the processor 109, 114 is a color chart detection confirmation light emitting section for confirming the color chart detection by emitting light, and the light emission is controlled by the controller 110 which receives the processing result of the processor 109. It

Next, the operation of the present apparatus having such a configuration will be described. First, a command for image capture is given from the keyboard 111 to put the controller 110 in the image capture mode. And the background 101 and the color chart 10
The person 2 and the person 103 are photographed by the color TV camera 104. Then, the color TV camera 104 outputs the image obtained by the shooting as a color video signal.

The color video signal output is converted into a digital signal by the A / D converter 105, converted into image data, and then stored in the color unadjusted image data storage area of the frame memory 106 under the control of the controller 110. Will be recorded. In the case of a TV camera, a predetermined number of screens are sequentially output as a video signal per unit time, so the controller 110 receives this through the A / D converter 105 and the color unadjusted image data in the frame memory 106. It will be sequentially updated and recorded in the storage area.

Color-unadjusted digital signals recorded in the color-unadjusted image data area of the frame memory 106, that is, color image data, are synchronized under the control of the controller 110 so that they can be output as video signals. While being read, the frames are sequentially read from the frame memory 106. The read color image data is D / A converter 1
07 is converted to analog and NTSC signal (RGB
It may be converted into a signal) and sent to the image display unit 108, where it is reproduced and displayed as a color image.

As a result, the color chart 10 is displayed on the image display unit 108.
A color portrait image of 2 is displayed and can be monitored. On the other hand, when the image data is recorded in the color unadjusted image data storage area of the frame memory 106, the controller 110 performs the above-described control for the monitor display and also the following color chart confirmation control. That is, of the image data for one screen recorded in the color unadjusted image data region of the frame memory 106, the controller 110 controls the video data of the image data of the designated image region (designated area in the image for one screen). The signals are sequentially read out in synchronism with scanning for signal output, and passed to the processor 109. Here, the above-mentioned designation is made by inputting coordinates to the controller 110 in advance by using the keyboard 111 or by setting a fixed value in the controller 110 in advance.

The processor 109 discriminates the image data of the designated image area thus read out and determines whether or not the color chart data exists in the designated image area.

If the processor 109 determines that the color chart data does not exist in the designated image area, the controller 110 says "No color chart is found" in the character display section 112. Display a warning message. In addition, the controller 110 has a warning sound generating unit 113.
Is controlled to drive the warning sound generation unit 113 to generate a warning sound.

On the other hand, when the processor 109 determines that the color chart exists in the designated image area, the controller 110 controls the color chart detection confirmation light emitting unit 114 to emit light to cause the color chart to exist in the image area. Indicates that there is a light.

Here, a method of detecting the color chart 102 will be described. FIG. 2 is a division of image areas in the color unadjusted image data area on the frame memory 106. The coordinates of the upper left corner and the lower right corner of the captured image are (x0, y
0) and (x1, y1), and the coordinates of the upper left corner and the lower right corner of the color chart confirmation area Ec, which is an area for capturing the color chart 102, are (x3, y3) and (x4, y4), respectively. The color chart confirmation area Ec is thus determined in advance. When it is desired to know the color patch data from the captured image data, the data in this area is used. Also, person 1
The image area where the image data of 03 is captured is (x2, y0
), (X1, y0), (x1, y1), (x2, y2)
Within the coordinates enclosed by.

Image areas (x3, y3), (x3, y4), (x4, y) in the frame memory 106 for capturing color charts.
4), the image data of (x4, y3) is sent to the controller 11
The data is read out while the address is controlled at 0 and transferred to the processor 109. The processor 109 performs the following differential filtering calculation processing.

G (x, y) = | f (x3 + m, y3 + n) -f (x3 + m + p, y3 + n + p) | (1) where f (x, y) is the coordinate (x, y) Is a gradation value of the image data, m and n are arbitrary integers of 0 or more, and p is an arbitrary natural number.

Since the color image is divided into R, G, and B components, it is processed for each of the R, G, and B components. First R
Consider digital data of (red image component).
The gradation value at the starting point is f (x3, y3). Focusing on that pixel, the pixel is sequentially calculated in the y-axis direction, and the average value is calculated and temporarily stored. The calculation formula is as follows.

/ G (x, y) = Σ | g (x, y) | / (y4−y3 + 1) (2) Here, the preset threshold value D0 and the equation (2) are calculated. Value is compared. Here / g (x, y) ≧
If D0, it means that the image portion of the color chart 102 in the image data is not captured in the designated image area, and the detection signal is sent via the controller 110 to the character display unit 11
2 and the warning sound generator 113, and the character display 1
12 and the warning sound generator 113 display that the color chart is not captured to inform the operator.

If / g (x, y) <D0, then
After the calculation of (2), 1 is added to m, the calculation of (2) is performed again, and the operation of comparing the calculated value with the threshold value D0 is repeated. The same is done for G (green image component) digital data and B (blue image component) digital data.

In addition to the above, the color chart discrimination can be performed as follows. That is, the color chart is rectangular and the background color is also determined. Therefore, it is possible to determine whether or not color chart data exists in the image area by, for example, determining whether or not the background color data has a rectangular area filled with single color data having a certain area or more. It can be done by investigating. In this case, the area for imprinting the color chart may be anywhere as long as it does not cover the human image.

If the processor 109 determines that the color chart data does not exist in the image area, the controller 110 causes the character display section 112 to display a warning message saying "color chart is not found". Is displayed. Further, the controller 110 drives and controls the warning sound generating unit 113 to cause the warning sound generating unit 113 to generate a warning sound.

On the other hand, when the processor 109 determines that the color chart exists in the image area, the controller 11
In the case of 0, the color chart detection / confirmation light emitting section 114 is controlled to emit light, and the presence of a color chart in the image area is displayed by light emission.

As described above, when the image data of the subject is captured, the image is displayed on the monitor, and the image data of a predetermined area of the image is extracted to check the presence or absence of the color patch data. Immediate notification is made so that the presence or absence of the color chart in the image data is immediately notified at the same time when the image data is captured, so that the image data with the color chart data imprinted on the image of the subject is also displayed. You can surely check whether it has been loaded in the memory,
Easy to adjust the angle of color TV camera.

Next, when an image capture confirmation command is given from the keyboard 111, the controller 110 stops capturing the image data from the color TV camera 104 and stops writing to the color unadjusted image data storage area of the frame memory 106. Then, at that stage, the image data in the color unadjusted image data storage area of the frame memory 106 is frozen.

Next, when a color conversion command (color correction command) is input from the keyboard 111, the controller 110 gives a command for executing color conversion to the processor 109, and the color unadjusted image data in the frame memory 106. The image data recorded in the storage area is read and given to the processor 109.

The processor 109 knows the image data value of the color chart from the image data of the designated image area, and uses the data value to perform an image conversion by a color conversion table that allows color adjustment so that the color of the color chart becomes the target color. Color conversion of all the data is performed and recorded in the color adjusted image data storage area of the frame memory 106. As a result, by converting the image data of the color chart so as to be the target color, the image data of other colors is also converted so as to be the data of the original color.

Then, the controller 110 sequentially reads the color-adjusted image data recorded in the color-adjusted image data storage area of the frame memory 106 from the frame memory 106 in synchronization with each other so as to output it as a video signal. The read color image data is D
Analog-converted by the A / A converter 107, and NTSC
Image display unit 1 after being converted into signals (may be RGB signals)
08, and is reproduced and displayed there as a color-adjusted color image.

As a result, the color chart 10 is displayed on the image display unit 108.
The color-adjusted color person image using 2 is displayed and can be monitored. The color-adjusted image data is stored and stored in a large-capacity storage device (not shown) or is processed and printed out.

Since there are many types of color charts, when the color chart to be used is decided, the original color of this color chart is instructed from the keyboard 111 and given to the controller 110. Gives an instruction to the processor 109 at the time of color adjustment, and the processor 109 uses the color conversion table to convert the data value of the image data for one screen so that the image data in the color chart area has the specified color. If the conversion value of the image data of the color chart area is determined, the conversion values of the image data of other colors are also determined. Therefore, if the data value of the image data of one screen is converted using the color conversion table, An image having a hue is obtained.

The first embodiment has been described above, but this embodiment has the following actions and effects. A color video signal processing device for performing color correction on an input color video signal, wherein data of an image in which a color chart is imaged together with a subject is processed so that a display color of the color chart becomes a target color. In a color image signal processing device that corrects data to obtain an image in a desired color state, a color chart that is a standard color,
Taking a picture of a person including the color chart to obtain a color video signal,
This is given to a means for converting it into digital data, digitally converted, and then recorded in an image memory, and it is detected whether or not the data of the color chip portion recorded in the image memory exists in a designated area on the image memory. By means of
If the data of the color chart part does not exist at the specified position in the image memory, a warning is generated, and if the data of the color chart part exists at the specified position in the image memory, the color chart is displayed. Since it is possible to confirm by the light emitting means that confirms that it has been detected, this makes it possible to reliably confirm whether or not the image data with the color chart data imprinted on the image of the subject was captured in the image memory. ,
It is easy to adjust the angle of the color TV camera. Therefore, it is possible to obtain an image in which a color chart is reliably captured and to obtain image data that has been subjected to color adjustment using this color chart with a simple configuration.

As described above, when the image data of the subject is fetched, the image is displayed on the monitor, the image data of a predetermined area of the image is extracted, and the presence or absence of the color patch data is checked. Let me know
Although the presence or absence of the color chart in the image data is immediately notified at the same time when the image data is captured, the angle of the color TV camera can be adjusted so that the color chart comes to a specific area of the image when the subject is imaged. By doing so, by directly extracting the image data of the specific area, the color adjustment using the data can be performed, and the system becomes simpler. An example will be described below.

(Second Embodiment) Next, a second embodiment of the present invention will be described. In the second embodiment, when a subject is imaged and an image is captured, a frame is displayed in a specific area of a monitor image so that a color chart comes in a specific area of the image, and a color TV camera is provided so that the color chart comes in here. The angle adjustment is made easier, and the details will be described below.

FIG. 3 is a block diagram showing the configuration of the system of the second embodiment. In FIG. 3, 101 is a monotone background, 102 is a color chart composed of standard colors, and 1 is a color chart.
03 is a person. These are the subjects. Reference numeral 104 denotes a color TV camera as a color image pickup device, which picks up an image of a subject and obtains a color image signal. Also, 1
05 is A / for converting an analog signal into a digital signal
The D converter converts a color image signal output from the color TV camera 104 into a digital signal and outputs the digital signal.

Reference numeral 106 denotes a frame memory for storing the digital signal from the A / D converter 105 as image data, and a color unadjusted image data storage area for storing image data of unadjusted color and color adjusted And a color-adjusted image data storage area for storing the image data of.

Further, 107 is the frame memory 106.
A D / A converter for converting the image data (digital signal) stored in the analog video signal into an analog video signal.
Reference numeral 08 denotes a color image display unit for displaying the output signal (video signal) from the D / A converter 107 as an image (visualized image).

Further, when 109 A receives a color conversion command (color correction command) via the controller 110 A by operating the keyboard 111, the specified data is specified from the image data recorded in the color unadjusted image data storage area of the frame memory 106. Image data of the area is extracted and used as color chart data, and data conversion (color correction) is performed for each image data of the entire image using a color conversion table that makes the color chart data exhibit a predetermined color. And frame memory 1
This is a processor for performing processing of storing in the processed image data storage area 06. The color conversion table is prepared in the processor 109A.

Reference numeral 110A is a controller for controlling the entire system, and reference numeral 111 is a keyboard for an operator (operator) to input data and instructions to the system. Reference numeral 112 denotes a character display unit for displaying characters, which is display-controlled by the controller 110A.

While the image data is being fetched from the color TV camera 104, the controller 110A stores the image data in the color unadjusted image data storage area of the frame memory 106, and reads it to read the image display unit 108.
After the color adjustment command is received and the color adjustment is performed, the color adjusted image data is read from the frame memory 106 and displayed on the image display unit 108. In addition, when the controller 110A reads out the image data from the frame memory 106 and displays it on the image display unit 108, in the case of an image based on the color unadjusted data, a graphic of a frame surrounding a predetermined color chart display area of the display image. Is generated and superposed on the image data, and an image including a figure of a frame surrounding the color chart display area is displayed on the image display unit 108.
It also has the function of controlling the display.

Reference numeral 101 denotes a uniform-colored background, which is blue when chroma key processing is performed, and achromatic color such as gray in other cases. Although a color chart 102 to be referred to for color adjustment of a captured image is arranged, a color TV camera 104
The color chart may be long in the vertical direction so that it can be easily captured.

A person 103 is photographed with a color TV camera 104 together with the color chart 102. Depending on the purpose of color adjustment, the color chart 102 has vertical stripe stripes of only achromatic color (white or gray, etc.) or chromatic color (skin color, etc.). However, the color is completely different from the background 101.

Next, the operation of the present apparatus having such a configuration will be described. First, an image capture command is given from the keyboard 111 to put the controller 110A in the image capture mode. And the background 101 and color chart 1
02 is photographed by the color TV camera 104 together with the person 103. Then, the color TV camera 104 outputs the image obtained by the shooting as a color video signal.

This color video signal output is converted into a digital signal by the A / D converter 105, converted into image data, and then stored in the color unadjusted image data storage area of the frame memory 106 under the control of the controller 110A. Will be recorded. In the case of TV cameras, the image is
Since the screens for a predetermined number of pages are sequentially output as video signals,
The controller 110A receives this via the A / D converter 105 and sequentially updates and records it in the color unadjusted image data storage area of the frame memory 106.

The color unadjusted digital signal recorded in the color unadjusted image data area of the frame memory 106, that is, the color image data, is synchronized under the control of the controller 110A so that it can be output as a video signal. While being taken, they are sequentially read from the frame memory 106. The read color image data is analog-converted by the D / A converter 107, and the NTSC signal (RG
It may be converted to a B signal) and sent to the image display unit 108, where it is reproduced and displayed as a color image.

At this time, the controller 110A generates a graphic of a frame surrounding a preset color chart display area and superimposes it on the image data, and the D / A converter 107 converts the figure into an analog area. An image including the figure of the surrounding frame is displayed on the image display unit 108, and the color chart 1
A color portrait image of 02 is displayed and can be monitored. Then, when the camera angle of the person image is adjusted so that the position of the color chart 102 is within the figure of the frame surrounding the color chart display area, the imprinting position of the color chart 102 becomes a fixed position, and furthermore, the person image and the color chart are The images will be obtained so that they do not overlap.

The display state of the photographed image on the image display unit 108 is shown in FIG. In FIG. 4, 108a is a person image, and Ec is a color chart confirmation area, which is a color chart display area when the camera angle is adjusted. Reference numeral 108b is a frame surrounding the color chart confirmation area Ec. The camera angle is adjusted so that the image of the color chart is accommodated in the frame 108b.
The person should be imprinted so that it does not overlap.

In the present system, the range for capturing the color chart image data in the frame memory 106 is preset and determined in the color adjusted image data storage area of the frame memory 106 as shown in FIG. Processor 10
9A sets the color chart image data by occupying the majority of the image data within the range of capturing this color chart image data (when the color chart is a single color), or The darker or lighter color data is used as the color chart image data (when the color chart has a stripe shape).

Therefore, by adjusting the camera angles as described above, in the present invention, when the processor 109A searches for color chart data, the color chart 102 and the person 103 are kept in the frame memory so that the subject does not have the color chart 102. The target data is configured so that the target data can be easily found so that the target data can be easily found.

This situation can be confirmed on the monitor screen (on the screen of the image display unit 108) by doing as described above, and the color chart is not imprinted or the color chart data is processed by the processor. It becomes possible to avoid the occurrence of a situation in which 109A misidentifies.

It should be noted that on the monitor screen, the controller 1 is arranged so that the range where the color chart 102 is captured can be confirmed as a "frame".
10A is configured to control frame figure formation display.
Then, the size of the “frame”, the color of the “frame”, the display position of the “frame”, etc. are set in advance. The setting may be fixed, but in order to have a degree of freedom, it is preferable to give a command and position specification information from the keyboard 111 so that the controller 110A can be arbitrarily set.

Next, when an image capture confirmation command is given from the keyboard 111, the controller 110A stops capturing the image data from the color TV camera 104, and stops writing to the color unadjusted image data storage area of the frame memory 106. Then, at that stage, the image data in the color unadjusted image data storage area of the frame memory 106 is frozen.

Next, when a color conversion command (color correction command) is input from the keyboard 111, the controller 110A gives a command for executing color conversion to the processor 109A, and the color unadjusted image data in the frame memory 106 is input. Read the image data recorded in the storage area,
This is given to the processor 109A. Processor 109
A uses the data value of the color chart confirmation area Ec, performs color conversion of all the image data by a color conversion table that allows color adjustment so that the color of the color chart becomes the target color, and
The data is recorded in the color adjusted image data storage area 06. As a result, by converting the image data of the color chart so that it becomes the target color, the image data of other colors is also converted so as to become the data of the original color.

Then, the controller 110A synchronizes with the frame memory 106 so that the color adjusted image data recorded in the color adjusted image data storage area of the frame memory 106 can be output as a video signal.
Are sequentially read from. The read color image data is analog-converted by the D / A converter 107,
The signal is converted into a C signal (may be an RGB signal) and sent to the image display unit 108, where it is reproduced and displayed as a color-adjusted color image.

As a result, the color chart 10 is displayed on the image display unit 108.
The color-adjusted color person image using 2 is displayed and can be monitored. The color-adjusted image data is stored and stored in a large-capacity storage device (not shown) or is processed and printed out.

Since there are many kinds of colors in the color chart, when the color chart to be used is decided, the original color of the color possessed by this color chart is instructed from the keyboard 111 and the controller 110A.
When the color adjustment is performed, the controller 110A gives an instruction to the processor 109A, and the processor 109A uses the color conversion table so that the image data of the color chart area becomes the specified color, and Convert data values. If the conversion value of the image data of the color chart area is determined, the conversion values of the image data of other colors are also determined. Therefore, if the data value of the image data of one screen is converted using the color conversion table, An image having a hue is obtained.

As described above, according to the second embodiment, the imprinting position of the color chart is set in advance, the image data at this position is recognized as the image data of the color chart on the frame memory, and this color chart data is recognized. So that the target color is
The color values are color-corrected, and when displaying the image on the display screen of the monitor device that monitors the captured image, a frame figure (of course Since it is only necessary to understand it, not only the rectangular frame shape but also any brackets or other area indication markers may be used), and if the color chart comes to this marker position, the color using the color chart will be displayed. Since correction is possible, it is sufficient to adjust the angle of the TV camera so that the imprinting position of the color chart is the proper position while looking at the monitor image. It is possible to imprint, and moreover, the data of the color chart can be recognized without error, so that the correct color correction can be performed.

The present invention is not limited to the above-described embodiments, but can be modified and implemented as appropriate without departing from the scope of the invention. Further, of course, the color chart is not limited to a square shape, and any geometrical shape that can be easily identified can be replaced with the shape.

Although various embodiments have been described above, the present invention can be summarized as follows. Firstly, a function for determining whether or not a color chart is printed at a planned position and notifying the color chart is provided. In this way, when the color chart is not in the planned position, it can be seen immediately so that the color chart will not be misidentified during color adjustment.It is composed of a uniform background and a standard color. Means for photographing a subject including the background and the color chart to obtain a color video signal, and digital conversion for digitally converting the color video signal obtained by the photographing means into image data Means, an image memory for holding the image data, a means for detecting whether or not the data of the color chart part exists in a designated area on the image memory from the image data of the image memory, and the color chart. Department If the data does not exist in the specified area in the image memory, and configured by including a means for generating a warning.

According to this, a color chart for color adjustment using standard colors is used, a video signal obtained by copying this into a part of the target image is obtained, and this video signal is converted into digital data, From the data of this video signal, it is detected whether the data of the color chart part is within the designated area of the image memory, and if the data of the color chart portion does not exist at the designated position of the image memory, a warning is issued. generate.

According to this, whether or not the color chart data is printed together in the image memory can be surely confirmed at the time of image loading, and not only the angle adjustment of the color TV camera can be easily performed but also the color adjustment can be performed easily. There is no misidentification of the votes, and moreover, the image data at the planned position becomes color chart data,
With a simple system configuration, it is possible to obtain the effect that it is possible to perform reliable color correction using color chart data.

Secondly, as means for detecting whether or not the data of the color chart part exists in a designated area on the image memory, differential filtering of image data is performed and the difference is preset. The threshold is set according to the threshold.

Using a color chart for color adjustment using standard colors, a video signal obtained by copying this into a part of the target image is obtained, and this video signal is converted into digital data, and the data of this video signal is obtained. Is expanded on the image memory, but in the above detection, differential filtering of image data in a designated area on the image memory is performed and the difference is compared with a preset threshold value. If the value calculated by the difference at that time is larger than the threshold value, it is determined that the color chart is not captured in the specified area on the image memory, and a signal for issuing a warning is sent to the means for issuing a warning. Let us know.

In this case, it is possible to obtain the effect that the process of detecting the color chart in the designated area of the image memory can be easily performed. Thirdly, the imprinting position of the color chart in the image is set in advance, and the image data at this position is recognized as the image data of the color chart on the image memory holding the image, and the color chart data is recognized. The image data values of the entire image are color-corrected so that the target color is obtained, and when the image is displayed on the display screen of the monitor device that monitors the captured image, a copy of the color chart is displayed. By displaying a frame graphic indicating the area of the embedded position or a marker such as a bracket, and making the color chart come to this marker position, color correction using the color chart can be performed.

According to this, if the angle of the TV camera is adjusted so that the imprinting position of the color chart is the proper position while observing the monitor image, correct color correction using the data of the color chart can be performed. Therefore, with a simple structure, it is possible to reliably imprint the color chart, and moreover, it is possible to recognize the data of the color chart without error, and therefore, it is possible to obtain the effect that correct color correction can be performed.

[0083]

As described above in detail, according to the present invention, it is possible to provide a color video signal processing device capable of easily recognizing a color chart for color adjustment and performing optimum color adjustment. it can.

[Brief description of drawings]

FIG. 1 is a diagram for explaining an embodiment of the present invention,
The block diagram for demonstrating the 1st Example of this invention.

FIG. 2 is a diagram for explaining an embodiment of the present invention,
FIG. 3 is a diagram for explaining a color chart data detection method according to the first embodiment of the present invention.

FIG. 3 is a diagram for explaining an embodiment of the present invention,
The block diagram which shows the structural example in 2nd Example of this invention.

FIG. 4 is a diagram for explaining an embodiment of the present invention,
The figure for demonstrating the 2nd Example of this invention.

[Explanation of symbols]

 101 ... Background 102 ... Color chart 103 ... Person 104 ... Color TV camera 105 ... A / D converter 106 ... Frame memory (image memory) 107 ... D / A converter 108 ... Image display unit 109, 109A ... Processor 110, 110A ... controller 111 ... keyboard 112 ... character display section 113 ... warning sound generating section 114 ... color chart detection confirmation light emitting section.

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] June 28, 1995

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0037

[Correction method] Change

[Correction content]

[0037]

[Equation 1] The image portion of the color chart 102 in the image data is not captured in the designated image area, and the detection signal is transferred to the character display unit 112 and the warning sound generation unit 113 via the controller 110. As a result, the character display unit 112 and the warning sound generation unit 113 display that the color chart is not captured, and inform the operator.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0038

[Correction method] Change

[Correction content]

[0038]

[Equation 2] After the calculation of the expression (2), 1 is added to m, the calculation of the expression (2) is performed again, and the operation of comparing the calculated value with the threshold value D0 is repeated. The same is done for G (green image component) digital data and B (blue image component) digital data.

[Procedure 3]

[Document name to be amended] Statement

[Name of item to be corrected] 0057

[Correction method] Change

[Correction content]

While the image data is being fetched from the color TV camera 104, the controller 110A stores the image data in the color unadjusted image data storage area of the frame memory 106, and reads it to read the image display unit 108.
After the color adjustment command is received and the color adjustment is performed, the color adjusted image data is read from the frame memory 106 and displayed on the image display unit 108. In addition, when the controller 110A reads out the image data from the frame memory 106 and displays it on the image display unit 108, in the case of an image based on the color unadjusted data, a graphic of a frame surrounding a predetermined color chart display area of the display image is displayed. An image generated by superimposing it on the image data and including a figure of a frame surrounding the color chart display area is displayed on the image display unit 108.
It also has the function of controlling the display.

Front page continuation (72) Inventor Junichi Ishibashi 2-43-2 Hatagaya, Shibuya-ku, Tokyo Olympus Optical Co., Ltd.

Claims (3)

[Claims] 1. Data of an image in which a color chart is imaged together with a subject is corrected so that the display color of the color chart becomes a target color, and an image in a desired color state is obtained. In the color image signal processing device described above, a photographing means for obtaining a color video signal by photographing a subject including the background having a uniform color, a color chart composed of standard colors, and the background and the color chart. A digital conversion means for digitally converting the color video signal obtained by the photographing means into image data; an image memory for storing the converted image data; and the color chart portion based on the image data in the image memory. Detection data for detecting whether or not the data exists in a specified area in the image memory, and a warning is issued when the data of the color chart part does not exist in the specified area in the image memory. Color video signal processing apparatus characterized by configured by including a warning generating unit for antibody, a. 2. As a means for detecting whether or not the data of the color chart portion exists in a designated area on the image memory, image difference filtering is performed, and the difference is discriminated by a preset threshold value. The color video signal processing device according to claim 1, wherein 3. Data of an image in which a color chart is imaged together with a subject is corrected so that a display color of the color chart becomes a target color, and an image in a desired color state is obtained. In the color image signal processing device described above, a photographing means for obtaining a color video signal by photographing a subject including the background having a uniform color, a color chart composed of standard colors, and the background and the color chart. A digital converting means for digitally converting the color video signal obtained by the photographing means into image data; an image memory for storing the converted image data; and image data for reading the image data in the image memory. Control means for superimposing a signal for displaying a marker indicating a color chart arrangement position on a designated screen area in the video signal, and an image display receiving the video signal from the control means. And an image display unit that uses the image data of the specified screen area corresponding position among the image data on the image memory as the data of the color chart part so that the color of the display image by the data becomes a desired color. A color video signal processing device comprising a processor for converting data.