Patent ID: 7973831

Claim:
A solid-state image sensor comprising: plural photoelectric conversion elements which form a grid pattern and output analog signals in accordance with amounts of received light; and an A/D converter which quantizes the analog signals output from the photoelectric conversion elements into digital signals and outputs the digital signals, wherein, the photoelectric conversion elements respectively have color filters which allow different color components to pass through, and the color filters are Bayer-arranged with red, green, and blue primary colors and divided into plural groups each including color filters of plural colors, the groups being cyclically provided, a signal output unit is further provided to mix up for each of the red, blue, and green colors the digital signals, which are output via the A/D converter, at predetermined sampling positions and at predetermined different rates, and outputs signals which are smaller in number than the photoelectric conversion elements and are Bayer-arranged, in regard to the digital signals output via the A/D converter, for each of predetermined square regions in each of which plural Bayer-arranged unit regions of two rows and two columns are provided and the red, blue, and green colors are identical with one another in terms of size, with reference to plural pixel values of that predetermined square region, the signal output unit multiplies the referred pixel values by weighting factors, calculates a sum of values resulting from multiplication, and divides the sum of values by a sum of the weighting factors, and a value calculated by division is output as a single pixel value, and sampling gravity centers each of which is a gravity center of the weighting factors of the predetermined square region are positioned at centers of the predetermined square regions, and are at equal intervals in both vertical and horizontal directions, and the intervals in the vertical direction are identical with the intervals in the horizontal direction.