Patent ID: 7573508

Claim:
An image-signal processing apparatus for processing an input image signal at a position of each pixel, said input image signal of each pixel having only one of various color components, said apparatus comprising: defect-correcting means for correcting defective pixels in the input image signal; clamping means for clamping the input image signal to eliminate shifted components of the defect-corrected image signal; white-balancing means for white-balancing the input image signal to correct the gain of the clamped image signal supplied from the clamping means; extraction means for extracting a plurality of pixels located near each pixel of interest of the white-balanced image signal in accordance with the color component of each pixel of interest; class-determining means for determining a class from the pixels extracted by the extraction means; and pixel-generating means for generating more than one color components for the pixel of interest in accordance with the class determined by the class-determining means, wherein the more than one color components include one color component that is the same as that of the input signal of the pixel of interest and a color component that is different from that of the input signal of the pixel of interest.