LINE EXTRACTION PROCESSOR, LINE EXTRACTION PROCESSING PROGRAM, STORAGE MEDIUM STORING LINE EXTRACTION PROCESSING PROGRAM, AND LINE EXTRACTION PROCESSING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a line extraction processor efficiently extracting a line.

SOLUTION: The line extraction processor 202 for extracting line data contained in image data comprises an X-directional differential processing part 205 for differentiating the image data in X-direction to form X-directional differential value data; an X-directional characteristic differential value data generation processing part 207 for generating a differential value having the maximum absolute value in a predetermined section of the X-directional differential value data as X-directional characteristic differential value data; and a Y-directional line extraction processing part 209 for extracting, from characteristic pixels having the X-directional characteristic differential value, a characteristic pixel satisfying a predetermined condition as a pixel showing line data in Y-direction.

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