Graphic reproduction method

Claim 1

A graphic reproduction method, comprising: a) a first step for scanning a contour of a predetermined graphic that has been read from a storage source that stores control points of contour information of graphics, wherein, given a primary scanning direction x and a secondary scanning direction y, said contour is expressed a formula x=f(y), and the direction of the secondary scan is divided into a section where y increments by 1 and a section where y decrements by 1, the first step includes: 1) detecting black change dots P B (x, y) in one of said two sections while one of the incrementing and decrementing is performed, 2) detecting white change dots P W (x+1, y) in another of said two sections while another of incrementing and decrementing is performed, and 3) performing nothing with respect to a section where only x changes for the same y, assuming that both ends of said section where x changes are made to be included into said section where y changes, and storing data of said black change dot P B (x, y) and white change dot P W (w+1, y) in a change dot memory, and b) a second step for scanning said change dot memory in which data of said black change dot P B (x, y) and a white change dot P W (x+1, y) have been stored, and for each scan, generating a black line signal for making black from a black change dot P B (x, y) to a dot immediately before a white change dot P W (x+1, y).