Image sensor and image processing apparatus generating a color ratio of a saturation pixel group

An image sensor comprising:

• a pixel array comprising a plurality of pixel groups each comprising a plurality of pixels, the plurality of pixel groups comprising a first pixel group;
• a readout circuit configured to generate image data based on pixel signals output by the pixel array;
• and
• an image signal processor,
• wherein the image data comprises full image data obtained by summing the pixel signals generated by all pixels of each of the plurality of pixel groups in units of pixel groups and sub image data obtained by summing the pixel signals generated by some of the pixels by each of the plurality of pixel groups in units of the pixel groups, and
• wherein the image signal processor is configured to:
• perform an image processing operation based on the image data;
• generate a color ratio of each of the plurality of pixel groups by using the sub image data;
• detect the first pixel group as a saturation pixel group based on the full image data;
• and
• compensate for the full image data corresponding to the saturation pixel group based on the color ratio corresponding to the saturation pixel group.

An image processing device comprising:

• an interface configured to receive, from an image sensor, full pixel values, the full pixel values being generated based on pixel signals of all pixels in each of a plurality of pixel groups of the image sensor, wherein each of the plurality of pixel groups respectively comprises a plurality of pixels;
• and
• a processor configured to:
• detect a saturation pixel group among the plurality of pixel groups based on the full pixel values;
• generate a color ratio of the saturation pixel group based on a target sub pixel value generated based on the pixel signals of some pixels in the saturation pixel group;
• detect an unsaturated color component among a plurality of color components corresponding to the full pixel value of the saturation pixel group;
• and
• compensate for the full pixel value of the saturation pixel group by using the color ratio of the unsaturated color component.