IMAGE REPRODUCTION INVOLVING ENLARGEMENT OF REDUCTION OF EXTRACTED CON CONTOUR VECTOR DATA FOR BINARY REGIONS IN IMAGE HAVING BOTH BINARY AND HALFTONE REGIONS

When an image is input, that input image is separated into a halftone region, such as a photograph, and a binary region, such as a character/line. Contour vector data along an edge of the separated binary image region is extracted. Regarding the binary image region, when the input image is to be enlarged or reduced and then output, individual coordinates in the extracted contour vector data are enlarged or reduced to reproduce the binary image.