Patent ID: 8115839

Claim:
An image signal processor, comprising: a receiver that receives first, second and third color pixel signals output from an imaging device, said first, second and third color pixel signals being generated by first, second and third color pixels according to magnitudes of first, second and third color light components received, respectively, said first, second and third color pixels being arranged on a light receiving surface of the imaging device according to a predetermined color array, distances from the third color pixel to the nearest first color pixel, from the third color pixel to the nearest second color pixel, and from the third color pixel to the nearest other third color pixel being different from each other; a mixing block that generates first, second and third color mixed pixel signals, said first, second and third color mixed pixel signals corresponding to a magnitude of the first, second and third color light components received by first, second and third color mixed pixel areas, respectively, said first, second and third color mixed pixel areas arranged so that said first, second and third color mixed pixel areas occupy spaces in accordance with said predetermined color array, and so that the centers of said first, second, and third mixed pixel areas coincide with different ones of said third color pixels, said first color mixed pixel signal being generated by mixing said first color pixel signals generated by a plurality of said first color pixels nearest to said third color pixel that coincides with a center of said first color mixed pixel area, said second color mixed pixel signal being generated by mixing said second color pixel signals generated by a plurality said second color pixels nearest to said third color pixel that coincides with a center of said second color mixed pixel area, and said third color mixed pixel signal being generated only by mixing together a central third color pixel signal generated by a central third color pixel that coincides with a center of said third color mixed pixel area, with said third color pixel signals generated by four said third color pixels nearest to said central third color pixel and surrounding said central third color pixel, wherein said third color mixed pixel signal is calculated by a summation of each said third color pixel signals generated by the four said third color pixels nearest to said central third color pixel and surrounding said central third color pixel, and four times said central third color pixel signal, the summation then being multiplied by a coefficient of one-half; and an adjustment block that adjusts the signal levels of said first, second and third color mixed pixel signals based on first, second and third pixel numbers used for the generation of said first, second and third color mixed pixel signals, respectively.