JP2000023185A - Color information processor and color information processing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the color reproducibility of image pickup signals formed by a CCD image sensor provided with a color filter. SOLUTION: A polarity judgement circuit 10 judges the polarity of respective color difference signals and supplies the polarity judgement output to a gain setting circuit 9. The chrominance signals of the respective color difference signals are indicated on two-dimensional coordinates for which an R-Y signal is presented on a vertical axis and a B-Y signal is presented on a horizontal axis by the angle and scalar amount. The gain setting circuit 9 sets the gain of the respective color difference signals for the respective quadrants of the two-dimensional coordinates corresponding to the polarity judgement output from the polarity judgement circuit 10. Respective multipliers 7 and 8 amplify the respective color difference signals by the gain set by the gain setting circuit 9 and output them. Thus, since the respective color difference signals are amplified by the gain set for the respective quadrants of the two-dimensional coordinates, the color reproducibility is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color signal processing system such as a camera device or a video camera device for taking an image of an object using a single-chip or two-chip solid-state image pickup device provided with a color filter. The present invention relates to a preferred color information processing apparatus and color information processing method.

[0002]

2. Description of the Related Art Conventionally, there has been known a video camera apparatus for imaging a subject using a CCD image sensor formed by arranging a plurality of solid-state imaging devices (CCDs) two-dimensionally. This CCD image sensor alone cannot recognize any color information like black and white film,
Only an imaging signal whose amplitude changes according to the intensity of light and darkness is obtained. For this reason, a single-panel or two-panel video camera device is provided with a color filter for recognizing color information at a stage preceding the CCD image sensor.

A color filter usually has three primary colors of red (R), green (G), and blue (B) and three colors of yellow (Ye), cyan (Cy), and magenta (Mg) in addition to a transparent portion. It is formed by selecting and combining two or three colors from among complementary colors. For example, a color filter using a primary color filter array such as a Bayer system or a stripe system, or a complementary color filter array such as a field color difference sequential system or a frame interleave system is used. Color filters and the like are known.

Here, usually, one of the CCD image sensors is used.
One color filter piece is assigned to each pixel, but it is very difficult to form a color filter having ideal spectral characteristics. Therefore, if an image is picked up by a CCD image sensor via a color filter, and the color difference signals (RY signal, BY signal) formed by this are used to display an image as it is, an ideal hue deviates. Inconvenience (color reproduction error) that image display is performed with the hue described above occurs. In order to prevent such a color reproduction error, a conventional video camera device is provided with a color signal processing device as shown in FIG. 7, and the color signal processing device performs a fine processing for each color difference signal. Each of the color difference signals is amplified by the adjusted gain to improve color reproducibility.

More specifically, this color signal processing device includes C
An RGB three primary color signal formed based on an image pickup signal formed by a CD image sensor and subjected to gamma correction processing is supplied. Brightness signal forming circuit 50
The (Y signal forming circuit) forms a luminance signal (Y signal) from the three primary color signals and supplies this to the color difference signal forming circuit 51. The chrominance signal forming circuit 51 forms two chrominance signals (RY signal and BY signal) based on the three primary color signals and the luminance signal supplied from the luminance signal forming circuit 50, and applies these to a matrix gain. Supply to the circuit 52. The matrix gain circuit 52 adjusts the phase of each color difference signal, and supplies these to the color difference gain circuit 53.

Each color difference signal is a signal that fluctuates positively or negatively around 0, and the respective color signals are R signals as shown in FIG.
The angle and the scalar amount are represented on two-dimensional coordinates with the -Y signal on the vertical axis and the BY signal on the horizontal axis. Color bars include magenta (Mg), red (R), yellow (Ye), green (G),
The color signals of blue (B) and cyan (Cy) are used. For each of these color signals, magenta (Mg) is the first quadrant on the two-dimensional coordinates, and red (R) and yellow (Ye) are the first quadrants. In the second quadrant, green (G) is in the third quadrant, blue (B) and cyan (C)
y) are located in the fourth quadrant, respectively.

The red (R) and yellow (Ye) of the second quadrant of the respective color difference signals whose phases have been adjusted by the matrix gain circuit 52 are ideal coordinates indicated by solid circles in FIG. If the position is shifted from the position to the coordinate position indicated by the dotted circle, the color difference gain circuit 53 increases the gain for amplifying the RY signal, amplifies the RY signal with the increased gain, and outputs the amplified RY signal. . Thereby, the red (R) of the second quadrant is obtained.
And the yellow (Ye) coordinate position can be corrected from the shifted coordinate position indicated by the dotted circle in FIG. 8 to the ideal coordinate position indicated by the solid circle in FIG. 8, and the color reproduction error can be corrected. To display images.

[0008]

However, in the conventional color signal processing device, the color difference
Even if it is desired to correct the coordinate position of only the red (R) and yellow (Ye) color signals on the representation, the correction is performed by increasing the gain of the entire RY signal as described above. Along with the coordinate positions of the red (R) and yellow (Ye) color signals on the quadrant, the magenta (Mg) color signal on the first quadrant, the green (G) color signal on the third quadrant, and The coordinate positions of the blue (B) and cyan (Cy) color signals on the fourth quadrant are also corrected.
If the color signals on the quadrant, the third and the fourth quadrants are present at the ideal coordinate positions, the result of correcting the coordinate positions of the color signals on the second quadrant, The color signals on the third and fourth quadrants are deviated from the ideal coordinate position. In spite of this, despite the correction of the coordinate position of each color signal, there has been an inconvenience (color reproduction error) in which the hue of the displayed image deviates from the ideal hue.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a color information processing apparatus and a color information processing method capable of improving color reproducibility.

[0010]

According to a color information processing apparatus of the present invention, as a means for solving the above-mentioned problems, a polarity of color information formed based on image information from solid-state image pickup means provided with a color filter. And a color information amplifying means for amplifying and outputting the color information with a gain corresponding to the polarity determination output from the polarity determining means.

Further, in the color information processing method according to the present invention, as a means for solving the above-mentioned problem, a step of determining the polarity of the color information formed based on the imaging information from the solid-state imaging means provided with a color filter. And amplifying and outputting the color information with a gain corresponding to the polarity of the color information determined in the step.

Such a color information processing apparatus and color information processing apparatus can amplify and output the color information with a gain corresponding to the polarity of the color information. The information level can be adjusted using the gain, and the color reproducibility of the display image of the imaging information formed by the solid-state imaging device provided with the color filter can be improved.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [First Embodiment] (Configuration of First Embodiment) A color information processing apparatus and a color information processing method according to the present invention are, for example, color signals of a single-panel video camera apparatus. It can be applied to the processing unit. FIG.
FIG. 1 is a block diagram of the color signal processing unit 1 of the single-panel video camera device according to the first embodiment of the present invention. In FIG. 1, the color signal processing unit 1 includes an RY signal and a B-
A color difference signal output adjustment unit 2 for adjusting the output level of each color difference signal as a Y signal, and a color difference gain setting unit 3 for setting a gain for amplifying each color difference signal for the color difference signal output adjustment unit 2. It is configured.

The color difference signal output adjusting section 2 is a luminance signal for forming a luminance signal (Y signal) based on the three primary color signals of red (R), green (G), and blue (B) that have been subjected to gamma correction processing. A color difference signal forming circuit 5 for forming RY and BY color difference signals based on the luminance signal formed by the luminance signal forming circuit 4 and the three primary color signals subjected to the gamma correction processing; A matrix gain circuit 6 for adjusting the phase of each color difference signal from the color difference signal forming circuit 5; and a color difference signal having good color reproducibility by amplifying each color difference signal with the gain set by the color difference gain setting section 3. Are formed and output.

The color difference gain setting section 3 includes a polarity determination circuit 10 for determining the polarity of each color difference signal whose phase has been adjusted by the matrix gain circuit 6, and a polarity determination circuit 10 for determining the polarity of each color difference signal determined by the polarity determination circuit 10. A gain setting circuit 9 for forming a gain for amplifying each color difference signal for each quadrant of the two-dimensional coordinates of each color difference signal, which will be described later, and setting the gain in each of the multipliers 7 and 8 is provided. Have.

(Operation of First Embodiment) Next, the operation of the video camera device of the first embodiment having the color signal processing section 1 having such a configuration will be described.

First, the color signal processing section 1 is provided at a stage subsequent to the gamma correction section 17 as can be seen from the block diagram of the signal processing system of the video camera apparatus shown in FIG. In FIG. 2, the single-plate CCD image sensor 11 is provided with a color filter using a primary color filter array such as a Bayer system or a stripe system, or a color filter using a complementary color filter array such as a field color difference sequential system or a frame interleave system. The imaging of the subject is performed through the color filter, and an imaging signal corresponding to the imaging is supplied to the imaging data forming unit 12.

The imaging data forming unit 12 removes noise components from the imaging signal by a correlated double sampling process (CDS), amplifies the noise component with an optimum gain, and (AGC:
Automatic gain control), and digitize (A / D) the image signal, which is an analog signal. The digitized image data is converted into a data amount of a required number of stages by the line memory 13 and supplied to the synchronization circuit 14.

The synchronizing circuit 14 performs a synchronizing process on the image pickup signal supplied from the line memory 13 to adjust the phase between the pixels when forming a color signal from a plurality of pixels. Is supplied to the color separation circuit 15.
The color separation circuit 15 forms RGB primary color signals based on image pickup signals corresponding to respective color filter pieces of the color filters provided in the CCD image sensor 11, and supplies these to a white balance adjustment circuit 16.

The RGB gain setting unit 18 sets the gain at which the signal levels of RGB coincide with each other in the achromatic color in the white balance adjustment circuit 16, and sets the white balance adjustment circuit 1.
6 amplifies each of the RGB signals with the set gain,
These are supplied to the gamma correction unit 17. Gamma correction unit 1
7 performs a gamma correction process on each of the RGB signals to adjust the signal level to the output characteristics of the monitor device;
This is supplied to the color signal processing unit 1.

Next, in FIG. 1, the RGB signals subjected to the gamma correction processing by the gamma correction unit 17 are supplied to the luminance signal forming circuit 4 and the color difference signal forming circuit 5 of the color signal output adjusting unit 2. The luminance signal forming circuit 4 forms a luminance signal based on each of the RGB signals, and supplies this to the color difference signal forming circuit 5. The color difference signal forming circuit 5 performs RY and BY based on the luminance signal formed by the luminance signal forming circuit 4 and each of the RGB signals from the gamma correction unit 17.
Are formed and supplied to the matrix gain circuit 6. The matrix gain circuit 6 adjusts the phase of each of the RY and BY color difference signals. The phase-adjusted RY signal is supplied to the RY signal multiplier 7, the BY signal is supplied to the BY signal multiplier 8, and the RY and BY signals are supplied. The Y color difference signals are supplied to the polarity determination circuit 10 of the color difference gain setting unit 3.

Each of the RY and BY color difference signals fluctuates positively or negatively with reference to the 0 level. The polarity determination circuit 10
The polarity of each color difference signal is determined, and this determination output is supplied to the gain setting circuit 9.

Here, as shown in FIG. 4, each color signal of each color difference signal is represented by its angle and scalar quantity on two-dimensional coordinates where the RY signal is the vertical axis and the BY signal is the horizontal axis. You. Color bars include magenta (Mg), red (R), yellow (Y
e), green (G), blue (B), and cyan (Cy) color signals are used, and these color signals are magenta (M
g) is the first quadrant on the two-dimensional coordinates, red (R) and yellow (Ye) are the second quadrant, green (G) is the third quadrant, and blue (B) and cyan (Cy) are the second quadrant. Each is located in each of the four quadrants.

The red (R) and yellow (Ye) of the second quadrant of the respective color difference signals whose phases have been adjusted by the matrix gain circuit 6 have the ideal coordinates indicated by solid circles in FIG. If the position is shifted from the position to the coordinate position indicated by the dotted circle, the polarity determination circuit 10 determines that the polarity of the RY signal is “positive” and that the BY signal is “negative”. You. When a determination output indicating that the polarity of each color difference signal is “positive” and “negative” is supplied, the gain setting circuit 9 sets the gain of the RY signal as shown in FIG. 7, the second RY gain is set as the gain of the BY signal.
Set the Y gain.

The second RY gain and the second BY
The gain is the red (R) of the second quadrant of the two-dimensional coordinates shown in FIG.
4 and a gain for correcting only the yellow (Ye) color signal to an ideal coordinate position indicated by a solid circle in FIG.
Each of the multipliers 7 and 8 amplifies the RY signal and the BY signal with the gain set by the gain setting circuit 9 and outputs the amplified RY signal and the BY signal. 2
By amplifying and outputting each of the color difference signals with the BY gain of (1), only the color signals of the phantom actually deviated from the ideal coordinate position, that is, in this case, as shown in FIG. Only the red (R) and yellow (Ye) color signals of the second quadrant can be corrected to be at the ideal coordinate position.

Next, in the above example, the red (R) and yellow (Ye) color signals of the second quadrant deviate from the ideal coordinate positions. If the color signal of (Mg) deviates from the ideal coordinate position, the polarity determination circuit 10 determines that the polarities of the RY signal and the BY signal are both “positive”. When the determination output indicating that the polarities of the respective color difference signals are both “positive” is supplied to the gain setting circuit 9, as shown in FIG.
A first RY gain is set in the multiplier 7 as a signal gain, and the multiplier 8 is set as a BY signal gain.
To set the first BY gain. The first RY gain and the first BY gain are gains for correcting only the magenta (Mg) color signal of the first quadrant of the two-dimensional coordinates shown in FIG. 4 to an ideal coordinate position. It has become. As a result, only the color signal of magenta (Mg) of the first quadrant can be corrected to be at the ideal coordinate position.

If the green (G) color signal of the third quadrant deviates from the ideal coordinate position, the polarity judgment circuit 10
As a result, both the polarities of the RY signal and the BY signal are determined to be "negative". The gain setting circuit 9
When a determination output indicating that the polarity of each of the color difference signals is “negative” is supplied, a third RY gain is given to the multiplier 7 as the gain of the RY signal as shown in FIG. The multiplier 8 sets the gain of the BY signal to a third value.
Is set. The third RY gain and the third BY gain correspond to the third three-dimensional gain of the two-dimensional coordinates shown in FIG.
The gain is used to correct only the green (G) color signal of the phantom to the ideal coordinate position. As a result, only the green (G) color signal of the third quadrant can be corrected to be the ideal coordinate position.

Also, the blue (B) and cyan (C
When the color signal of y) deviates from the ideal coordinate position, the polarity determination circuit 10 determines that the polarity of the RY signal is “negative” and the polarity of the BY signal is “positive”. Become. When the determination output indicating that the polarity of each color difference signal is “negative” and “positive” is supplied, the gain setting circuit 9 sets the gain of the RY signal as shown in FIG. 7 while setting the fourth RY gain.
A fourth BY gain is set in the multiplier 8 as the gain of the -Y signal. The fourth RY gain and the fourth B-
The Y gain is a gain for correcting only the blue (B) and cyan (Cy) color signals of the fourth quadrant of the two-dimensional coordinates shown in FIG. 4 to an ideal coordinate position. As a result, the fourth
Only the blue (B) and cyan (Cy) color signals of the phantom can be corrected to the ideal coordinate position.

(Effects of First Embodiment) As is clear from the above description, the video camera device of the first embodiment determines the coordinate position based on the judgment output from the polarity judgment circuit 10. It is possible to select a gain capable of correcting only the color signal of the displaced symbol to the correct coordinate position, and amplify and output each color difference signal with this gain. For this reason,
It is possible to correct only the necessary color signal of the phantom, and to output each color difference signal that makes the hue of the display image an ideal hue. Therefore, the color reproducibility of the displayed image can be improved.

Further, since the color reproduction error can be electrically corrected in this manner, the accuracy of the spectral characteristics of the color filters provided in the CCD image sensor 11 can be relaxed, and the manufacturing process of the color filters can be reduced. Variations in spectral characteristics can be absorbed. Therefore, it is possible to greatly contribute to the yield and cost reduction of the CCD image sensor 11.

[Second Embodiment] Next, a second embodiment of a color information processing apparatus and a color information processing method according to the present invention will be described. In the second embodiment, as in the first embodiment, the color information processing apparatus according to the present invention is applied to a single-panel video camera apparatus. In the first embodiment, the gain setting circuit 9 has four kinds of gains for each quadrant, and selects a corresponding gain from the four kinds of gains according to the judgment output from the polarity judgment circuit 10. In this second embodiment, the gain setting circuit 9 sets the multipliers 7 and 8 to the first and second quadrants and the third and fourth quadrants. The corresponding gain is selected from the two types of gains according to the determination output from the polarity determination circuit 10 and set in each of the multipliers 7 and 8 so that a memory such as a memory for each gain is provided. This is to reduce the circuit scale. Since the second embodiment is different from the first embodiment only in this point, only the difference will be described below, and the duplicated description will be omitted. The same reference numerals are given to portions indicating the same operations as those of the embodiment, and the detailed description thereof will be omitted.

(Configuration of the Second Embodiment) The R of the color difference gain setting unit 3 of the video camera device of the second embodiment
As shown in FIG. 5, the chrominance gain setting section 9 for the -Y signal includes a first R- signal which is a gain for the first and second quadrants of the RY signal.
First RY gain memory 21 in which Y gain is stored
And a second RY gain memory 2 in which a second RY gain which is a gain for the third and fourth quadrants of the RY signal is stored.
2 and a gain changeover switch 23 for switching the first and second RY gains from the memories 21 and 22 in accordance with the judgment output from the polarity judgment circuit 10 and setting the gain in the multiplier 7. I have. Further, the color difference gain setting unit 9 for the BY signal is provided with a first BY gain memory in which a first BY gain which is a gain for the first and fourth quadrants of the BY signal is stored. 24, a second BY gain memory 25 storing a second BY gain which is a gain for the second and third quadrants of the BY signal, and a judgment output from the polarity judgment circuit 10. , The first and second BY from each of the memories 24 and 25
A gain changeover switch 26 for changing over the gain and setting the multiplier 8.

(Operation of the Second Embodiment) Now, among the respective color difference signals whose phases have been adjusted by the matrix gain circuit 6, red (R) and yellow (Ye) of the second quadrant are shown in FIG.
Assuming that the position is shifted from the ideal coordinate position indicated by the solid-line circle to the coordinate position indicated by the dotted-line circle, the polarity of the RY signal is determined to be "positive" by the polarity determination circuit 10, and B-
The polarity of the Y signal is determined to be “negative”. In this case, the gain changeover switch 23 shown in FIG. 5 selects the selected terminal 23a by the selection terminal 23c, and the gain changeover switch 26 selects the selected terminal 26b by the selection terminal 26c. As a result, the first RY gain, which is the gain for the first and second quadrants of the RY signal stored in the first RY gain memory 21, is changed by the gain switch 2
3, the second BY gain, which is the gain for the second and third quadrants of the BY signal stored in the second BY gain memory 24 and set in the multiplier 7, The value is set in the multiplier 8 via the gain changeover switch 26.

As a result, the RY signal and the BY signal are amplified by the multipliers 7 and 8 with the first RY gain or the second BY gain, respectively. As shown, the red (R) and yellow (Ye) color signals that have shifted to the coordinate positions indicated by the dotted circles in the figure are corrected to the ideal coordinate positions indicated by the solid circles. . For this reason, it is possible to correct only the necessary color signal of the phantom, and it is possible to output each color difference signal that makes the hue of the display image an ideal hue. Therefore, the color reproducibility of the displayed image can be improved.

However, in this case, the first RY gain stored in the first RY gain memory 21 is RY
Since the gains are for the first and second quadrants of the signal, the coordinate positions of the red (R) and yellow (Ye) color signals on the second quadrant are corrected as shown in FIG. As shown, the coordinate position of magenta (Mg) is also corrected at the same time, and the coordinate position of magenta (Mg) may deviate from the ideal coordinate position. Since (G), blue (B), and cyan (Cy) are not affected by this correction, the color reproducibility is improved as compared with the conventional case where each color difference signal is amplified with a uniform gain. be able to.

Next, RY is calculated by the polarity determination circuit 10.
When it is determined that both the polarity of the signal and the BY signal are “positive”, the gain changeover switch 23 shown in FIG. 5 selects the selected terminal 23a by the selection terminal 23c, and the gain changeover switch 26 sets the selection terminal 26c Selects the selected terminal 26a. As a result, the first RY gain, which is the gain for the first and second quadrants of the RY signal stored in the first RY gain memory 21, is multiplied via the gain switch 23. The first B-
The first BY gain, which is the gain for the first and fourth quadrants of the BY signal stored in the Y gain memory 24, is set in the multiplier 8 via the gain switch 26. Then, the RY signal and the BY signal are converted into respective multipliers 7,
8, the signal is amplified by the first RY gain or the first BY gain, and the coordinate position of each color signal is corrected.

The polarity determination circuit 10 calculates RY
When both the polarity of the signal and the BY signal are determined to be "negative", the gain changeover switch 23 shown in FIG. 5 selects the selected terminal 23b by the selection terminal 23c, and the gain changeover switch 26 sets the selection terminal 26c Selects the selected terminal 26b. Thus, the second RY gain, which is the gain for the third and fourth quadrants of the RY signal stored in the second RY gain memory 22, is multiplied via the gain changeover switch 23. The second B-
The second BY gain, which is the gain for the second and third quadrants of the BY signal stored in the Y gain memory 25, is set to the multiplier 8 via the gain switch 26. Then, the RY signal and the BY signal are converted into respective multipliers 7,
8, the signal is amplified with the second RY gain or the second BY gain, and the coordinate position of each color signal is corrected.

The polarity judgment circuit 10 calculates RY
When it is determined that the polarity of the signal is “negative” and the polarity of the BY signal is “positive”, the gain switch 23 shown in FIG.
Selects the selected terminal 23b by the selection terminal 23c,
The gain changeover switch 26 selects the selected terminal 26a by the selection terminal 26c. Thereby, the second R-
The second RY gain, which is the gain for the third and fourth quadrants of the RY signal stored in the Y gain memory 22, is set in the multiplier 7 via the gain changeover switch 23, and B stored in the BY gain memory 24 of FIG.
A first BY which is a gain for the first and fourth quadrants of the -Y signal;
The gain is set in the multiplier 8 via the gain changeover switch 26. Then, the RY signal and the BY signal are respectively amplified by the multipliers 7 and 8 with the second RY gain or the first BY gain, and the coordinate position of each color signal is corrected. Become.

(Effects of the Second Embodiment) As is clear from the above description, the video camera apparatus of the second embodiment uses the first and second quadrants for the RY signal. A gain and two kinds of gains for the third and fourth quadrants are prepared,
For the BY signal, two kinds of gains for the first and fourth quadrants and two kinds of gains for the second and third quadrants are prepared, and these gains are switched according to the judgment output from the polarity judgment circuit 10. With such a configuration, it is possible to simplify the circuit scale by reducing the number of memories for storing the respective gains, and to obtain the same effect as that of the first embodiment.

Finally, each of the above embodiments is only an example of the present invention. For this reason, the present invention is not limited to each embodiment, and in addition, it is possible that various changes can be made according to the design and the like without departing from the technical idea according to the present invention. Of course.

[0041]

According to the color information processing apparatus and the color information processing method of the present invention, it is possible to improve the accuracy of adjusting the hue of color information, thereby improving the display accuracy of the image displayed by the solid-state imaging means provided with color filters. The color reproducibility can be improved. Further, the accuracy of the spectral characteristics of the color filters provided in the solid-state imaging means can be reduced, and the dispersion of the spectral characteristics in the manufacture of the color filters can be absorbed. Therefore, it can greatly contribute to the yield and cost reduction of the solid-state imaging means.

[Brief description of the drawings]

FIG. 1 is a block diagram of a color difference signal processing unit of a single-panel video camera device according to a first embodiment provided with a color information processing apparatus and a color information processing method according to the present invention.

FIG. 2 is a block diagram of a signal processing system of the video camera device according to the first embodiment.

FIG. 3 is a diagram for explaining a gain of an amplifier for amplifying each color difference signal, which is changed by a color difference signal processing unit of the video camera device according to the first embodiment in accordance with the polarity of each color difference signal; .

FIG. 4 is a diagram illustrating color signals whose coordinate positions are corrected for each quadrant by a color difference signal processing unit of the video camera device according to the first embodiment.

FIG. 5 is a block diagram of a color difference signal processing unit of a single-panel video camera device according to a second embodiment provided with a color information processing apparatus and a color information processing method according to the present invention.

FIG. 6 is a diagram illustrating color signals whose coordinate positions are corrected for each quadrant by a color difference signal processing unit of the video camera device according to the second embodiment.

FIG. 7 is a block diagram of a color signal processing device provided in a conventional single-panel video camera device.

FIG. 8 shows that, as a result of finely adjusting the gain of each color difference signal by the conventional color signal processing device, even the coordinate position of the color signal on the unintended quadrant is corrected, causing a color reproduction error in the display image. It is a figure for explaining a disadvantage.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Color difference signal processing part, 2 ... Color difference signal output adjustment part, 3 ... Color difference gain setting part, 4 ... Luminance signal formation circuit, 5 ... Color difference signal formation circuit, 6 ... Matrix gain circuit, 7, 8 ... Multiplier, 9 ... Gain setting circuit, 10 ... Polarity judgment circuit, 11 ...
CCD image sensor (single plate), 12: imaging data forming unit, 13: line memory, 14: synchronization circuit, 15: color separation circuit, 16: white balance adjustment circuit, 17: gamma correction unit, 18: RGB gain setting Section 21, 21 first RY gain generating circuit, 22 second RY gain generating circuit, 23, 26 gain switching switch, 24 first BY gain generating circuit, 25 second BY gain generation circuit

Claims (5)

[Claims] 1. A polarity judging means for judging the polarity of color information formed based on imaging information from a solid-state imaging means provided with a color filter; and a gain according to a polarity judging output from said polarity judging means. A color information processing device comprising: color information amplifying means for amplifying and outputting color information. 2. The color information is RY and BY color difference information, and the polarity determining means determines the polarity of each of the color difference information and outputs a polarity determination output of each of the color difference information. 2. The color information processing apparatus according to claim 1, wherein the color information amplifying unit amplifies and outputs each of the color difference information with a gain according to a polarity determination output from the polarity determination unit. 3. The color information amplifying means includes: first to fourth color information on two-dimensional coordinates in which RY information is represented on a vertical axis and BY information is represented on a horizontal axis, and each color information is represented by its angle and scalar quantity 3. A gain according to the polarity determination output is selected from gains assigned to respective quadrants, and the respective color difference information is amplified and output with the selected gain.
The color information processing apparatus according to the above. 4. The color information amplifying means, wherein RY information is represented on a vertical axis and BY information is represented on a horizontal axis, and each color information is represented by an angle and a scalar quantity with respect to first and second quadrants of two-dimensional coordinates. The first gain and the second gain assigned to the third and fourth quadrants are assigned as the gains of the RY information, and the first and fourth quadrants of the two-dimensional coordinates are assigned to the first and fourth quadrants. And the second gain assigned to the second and third quadrants as gains of the BY information, and from among these gains, in accordance with the polarity determination output. 3. The color information processing device according to claim 2, wherein the selected gain is selected, and the respective color difference information is amplified and output with the selected gain. 5. A step of judging the polarity of color information formed based on imaging information from a solid-state imaging device having a color filter, and the color information having a gain corresponding to the polarity of the color information determined in the step. And outputting the amplified information.