| 摘要 |
The present invention provides a picture-processing apparatus and method for finding a point A (xp, yp) on a projection drawing showing a first surface as a point corresponding to a point a (-1/2, ye) on the left side of a square shape forming an expansion drawing of the first surface and a point B (xp', yp') on the projection drawing as a point corresponding to a point b (1/2, ye) on the right side of a square shape forming an expansion drawing of a second surface adjacent to the first surface on the basis of a predetermined transformation relation. On the expansion drawings, the point a coincides with the point b. The transformation relation is corrected by finding average coordinates ((xp+xp')/2, (yp+yp')/2) as the coordinates of a new point C located on the projection drawing and designated as a point corresponding to the point a (-1/2, ye), and using a pair of the point C and the point a (-1/2, ye) as a base for a new transformation relation. As a result, a natural expansion drawing found by using the new transformation relation can be obtained, allowing editing work to be done with ease.
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