Patent ID: 7554583

Claim:
A pixel signal processing apparatus for processing pixel signals from pixels arrayed in a two-dimensional plane, each pixel having a different one of N spectral characteristics, to generate an interpolated pixel signal having a k-th spectral characteristic at a pixel interpolation position occupied by a pixel having an h-th spectral characteristic, where h and k are positive integers between 1 and N, inclusive, the pixel signal processing apparatus comprising: a difference calculation means for calculating a difference between a low-frequency component of pixel signals having the k-th spectral characteristic in a plurality of pixel positions in a neighborhood of the pixel interpolation position and a low-frequency component of pixel signals having the h-th spectral characteristic in a plurality of pixel positions in the neighborhood of the pixel interpolation position; a non-correlation value calculating means for calculating a non-correlation value corresponding to a degree of non-correlation between the pixel signals having the k-th spectral characteristic and the pixel signals having the h-th spectral characteristic in the neighborhood of the pixel interpolation position; and an interpolated value calculating means for obtaining the pixel signal having the k-th spectral characteristic at the pixel interpolation position from the pixel signal having the h-th spectral characteristic at the pixel interpolation position, the difference, and the non-correlation value.