| 摘要 |
<P>PROBLEM TO BE SOLVED: To perform data compression processing regarding a line drawing at high speed with a small calculation amount, when creating a small reduction scale drawing in which a scale reduction rate is high, from a large reduction scale drawing in which the scale reduction rate is low. <P>SOLUTION: A scale mark is set with a first interval in which a first actual size is scaled down in a scale of the large reduction scale drawing, and a coordinate in the scale mark with the first interval is attached for each point for the line drawing which is drawn by connecting a plurality of points in the large reduction scale drawing. A second actual scale which is larger than the first actual scale is specified corresponding to the scale of the small reduction scale drawing, and the scale mark is set with a second interval in which a second actual scale is scaled down in a scale of the small reduction scale drawing. The coordinate of each point in the large reduction scale drawing is transformed to the coordinate in the scale mark with the second interval in the small reduction scale drawing, and a plurality of points which come to be located in the same coordinate by transformation in the small reduction scale drawing, are unified, and one point is remained while the other points are deleted, and the line drawing is created by connecting the points in the small reduction scale drawing. <P>COPYRIGHT: (C)2008,JPO&INPIT |
