| http://www.w3.org/ns/prov#value | - In this case, the color-boundary detection image is an image in which only the boundary lines between different colors of the color image 201 are developed.After the binary image signal S.sub.BIM is produced by the binary image converter 108, the exclusive-OR circuit 109 calculates the logical exclusive-OR of the color-boundary detection signal S.sub.2 and the binary image signal S.sub.BIM. Theref
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