Patent ID: 7092020

Claim:
An electronic still camera comprising: (a) an image sensor having a color filter array and capable of outputting a color signal for each pixel in a prespecified pixel array; (b) an A/D conversion means for converting a signal from said image sensor to a digital signal; and (c) a processor for generating an image having a desired size by interpolating the color signal at a given pixel position according to the color signal for each pixel to produce an output image size different from said prespecified pixel array size; wherein said processor separates a low frequency component of the color signal to be interpolated from a high frequency component thereof, interpolates said low frequency component using signals from a plurality of same color pixels surrounding and adjoining the pixel position to be interpolated, and interpolates said high frequency component using a brightness value at a pixel position to be interpolated as well as brightness values at a plurality of pixel positions surrounding and adjoining the pixel position to be interpolated.