| 摘要 |
<P>PROBLEM TO BE SOLVED: To speedily extract a vertex boundary line of a pixel boundary separating color regions in a multivalued image. <P>SOLUTION: Raster scanning is performed on a multivalued image with a pixel matrix (window) having a predetermined size, and in accordance with the state of a plurality of pixels in the pixel matrix, determination of a color intersection dividing a contour forming a boundary between pixels having different values and extraction of a contour point forming the boundary between the pixels having the different values are performed. Then, using the obtained color intersection and contour point, contour information composed of contour lines divided at each color intersection is generated. <P>COPYRIGHT: (C)2013,JPO&INPIT |
