Patent ID: 7369284

Claim:
An image signal processing system comprising: an input device including: filter means of a plurality of kinds of spectrum distributions in a plurality of optoelectrical conversion elements on a plane; a sensor for reading an object and outputting a plurality of color signals; an analog to digital (AD) converter for performing AD conversion of the plurality of color signals from said sensor; an encoding circuit for encoding a plurality of the AD converted color signals; a memory for storing the encoded color signals; a transmitting portion for transmitting a plurality of the stored color signals from said memory and a color arrangement information indicative of a relationship between said plurality of optoelectrical conversion elements and a plurality of kinds of color filters, to an external device; and an output device including: a decoding circuit for decoding a plurality of transmitted color signals from the transmitting portion of said input device; a color signal converting circuit for converting a plurality of the decoded color signals which are input as one kind of color signal per pixel into a plurality of color signals different from said decoded color signals for output as at least one kind of color signal per pixel different from the input kind of color signal per pixel; and a printing portion for displaying or printing said plurality of converted color signals, wherein: said color signal converting circuit includes an edge detection circuit which performs detection of an edge portion in said plurality of transmitted color signals and detection of pixels located on said edge portion, and generates a plurality of converted color signals by combining different kinds of color signals of adjacent pixels in a non-edge portion or generates a plurality of converted color signals are generated by using color signals of peripheral regions in said edge portion; and said edge detection circuit includes a difference vector calculating means combining a plurality of kinds of color signals, and a comparator for comparing with a predetermined threshold value.