Patent ID: 8269850

Claim:
A signal processing method comprising the steps of: performing first resolution conversion for phase retention on a signal that is fed from an image sensor, that has undergone defect correction processing, and that represents the order of the color array in the image sensor; performing color separation processing on a first signal resulting from the first resolution conversion; and performing second resolution conversion for thin-line retention on second signals resulting from the color separation processing, wherein performing second resolution conversion comprises performing bi-cubic conversion on an original image to generate a bi-cubic conversion completed image, performing pattern recognition on the original image to generate a pattern recognition conversion completed image, generating a certainty based on the original image, multiplying the pattern recognition conversion completed image by the certainty to generate a multiplication result, adding the multiplication result to the bi-cubic conversion completed image to generate an addition result, and normalizing the addition result, wherein the steps of performing said first and second resolution conversions are done by an image processing circuit.