Desaturation control

1. A non-transitory computer-readable storage medium, comprising executable instructions that, when executed by a processor, facilitate performance of operations, comprising:

obtaining, by an image signal processor, from an image sensor, an input image signal representing an input image;

obtaining, by the image signal processor, color correction information for the input image;

obtaining a color corrected image based on the input image using color correction with desaturation control such that inaccurate colorization of the color corrected image is minimized, wherein obtaining the color corrected image includes:

obtaining a color corrected pixel based on an input pixel from the input image using color correction with desaturation control such that inaccurate colorization of the color corrected pixel is minimized;

in response to a determination that, for the input pixel, the color correction information includes a blue component correction coefficient and a red component correction coefficient that is less than one and is less than the blue component correction coefficient, desaturation control includes desaturation control proportional to the red color channel;

in response to a determination that, for the input pixel, the color correction information includes a red component correction coefficient and a blue component correction coefficient that is less than one and is less than the red component correction coefficient, desaturation control includes desaturation control proportional to the blue color channel; and

including the color corrected pixel in the color corrected image; and

outputting the color corrected image.

2. The non-transitory computer-readable storage medium of claim 1 , wherein:

obtaining the color corrected pixel based on the input pixel from the input image using color correction with desaturation control include:

obtaining a desaturation control color corrected pixel using desaturation control based on the input pixel; and

obtaining an adaptive desaturation control color corrected pixel using adaptive desaturation control based on the desaturation control color corrected pixel, such that inaccurate color brightness increase is minimized; and

including the color corrected pixel in the color corrected image includes including the adaptive desaturation control color corrected pixel in the color corrected image.

3. The non-transitory computer-readable storage medium of claim 2 , wherein obtaining the adaptive desaturation control color corrected pixel using adaptive desaturation control includes adaptive desaturation control based on a ratio between a green color channel value of the input pixel and a green color channel value of the desaturation control color corrected pixel.

4. The non-transitory computer-readable storage medium of claim 2 , wherein obtaining the adaptive desaturation control color corrected pixel using adaptive desaturation control includes obtaining the adaptive desaturation control color corrected pixel in response to a determination that, for the input pixel, the color correction information includes a blue component correction coefficient and a red component correction coefficient, wherein at least one of the blue component correction coefficient or the red component correction coefficient is less than one.

5. The non-transitory computer-readable storage medium of claim 2 , wherein obtaining the adaptive desaturation control color corrected pixel using adaptive desaturation control includes omitting obtaining the adaptive desaturation control color corrected pixel in response to a determination that, for the input pixel, the color correction information includes a blue component correction coefficient and a red component correction coefficient, wherein the blue component correction coefficient is at least one and the red component correction coefficient is at least one.

6. A method comprising:

obtaining, by an image signal processor, from an image sensor, an input image signal representing an input image;

obtaining, by the image signal processor, color correction information for the input image;

obtaining a color corrected image based on the input image using color correction with desaturation control such that inaccurate colorization of the color corrected image is minimized wherein obtaining the color corrected image includes:

obtaining a color corrected pixel based on an input pixel from the input image using color correction with desaturation control such that inaccurate colorization of the color corrected pixel is minimized;

in response to a determination that, for the input pixel, the color correction information includes a blue component correction coefficient and a red component correction coefficient that is less than one and is less than the blue component correction coefficient, desaturation control includes desaturation control proportional to the red color channel;

in response to a determination that, for the input pixel, the color correction information includes a red component correction coefficient and a blue component correction coefficient that is less than one and is less than the red component correction coefficient, desaturation control includes desaturation control proportional to the blue color channel; and

including the color corrected pixel in the color corrected image; and

outputting the color corrected image.

7. The method of claim 6 , wherein:

obtaining the color corrected pixel based on the input pixel from the input image using color correction with desaturation control include:

obtaining a desaturation control color corrected pixel using desaturation control based on the input pixel; and

obtaining an adaptive desaturation control color corrected pixel using adaptive desaturation control based on the desaturation control color corrected pixel, such that inaccurate color brightness increase is minimized; and

including the color corrected pixel in the color corrected image includes including the adaptive desaturation control color corrected pixel in the color corrected image.

8. The method of claim 7 , wherein obtaining the adaptive desaturation control color corrected pixel using adaptive desaturation control includes adaptive desaturation control based on a ratio between a green color channel value of the input pixel and a green color channel value of the desaturation control color corrected pixel.

9. The method of claim 7 , wherein obtaining the adaptive desaturation control color corrected pixel using adaptive desaturation control includes obtaining the adaptive desaturation control color corrected pixel in response to a determination that, for the input pixel, the color correction information includes a blue component correction coefficient and a red component correction coefficient, wherein at least one of the blue component correction coefficient or the red component correction coefficient is less than one.

10. The method of claim 7 , wherein obtaining the adaptive desaturation control color corrected pixel using adaptive desaturation control includes omitting obtaining the adaptive desaturation control color corrected pixel in response to a determination that, for the input pixel, the color correction information includes a blue component correction coefficient and a red component correction coefficient, wherein the blue component correction coefficient is at least one and the red component correction coefficient is at least one.

11. An apparatus comprising:

an image sensor;

an image signal processor configured to:

obtain, from the image sensor, an input image signal representing an input image;

obtain color correction information for the input image;

obtain a color corrected image based on the input image using color correction with desaturation control such that inaccurate colorization of the color corrected image is minimized, wherein the processor is configured to obtain the color corrected image by:

obtaining a color corrected pixel based on an input pixel from the input image using color correction with desaturation control such that inaccurate colorization of the color corrected pixel is minimized;

in response to a determination that, for the input pixel, the color correction information includes a blue component correction coefficient and a red component correction coefficient that is less than one and is less than the blue component correction coefficient, desaturation control includes desaturation control proportional to the red color channel;

in response to a determination that, for the input pixel, the color correction information includes a red component correction coefficient and a blue component correction coefficient that is less than one and is less than the red component correction coefficient, desaturation control includes desaturation control proportional to the blue color channel; and

including the color corrected pixel in the color corrected image; and

output the color corrected image.

12. The apparatus of claim 11 , wherein the processor is configured to:

obtain the color corrected pixel based on the input pixel from the input image using color correction with desaturation control by:

obtaining a desaturation control color corrected pixel using desaturation control based on the input pixel; and

obtaining an adaptive desaturation control color corrected pixel using adaptive desaturation control based on the desaturation control color corrected pixel, such that inaccurate color brightness increase is minimized; and

include the color corrected pixel in the color corrected image by including the adaptive desaturation control color corrected pixel in the color corrected image.

13. The apparatus of claim 12 , wherein the processor is configured to obtain the adaptive desaturation control color corrected pixel using adaptive desaturation control includes adaptive desaturation control based on a ratio between a green color channel value of the input pixel and a green color channel value of the desaturation control color corrected pixel.

14. The apparatus of claim 12 , wherein the processor is configured to obtain the adaptive desaturation control color corrected pixel using adaptive desaturation control by:

obtaining the adaptive desaturation control color corrected pixel in response to a determination that, for the input pixel, the color correction information includes a blue component correction coefficient and a red component correction coefficient, wherein at least one of the blue component correction coefficient or the red component correction coefficient is less than one; and

omitting obtaining the adaptive desaturation control color corrected pixel in response to a determination that the blue component correction coefficient is at least one and the red component correction coefficient is at least one.