| 摘要 |
PURPOSE:To obtain a pattern which regenerates more faithfully the features of an original pattern by correcting a error between position information on each extracted part undergone an averaging process and the position information on the original pattern by scattering said errorevenly on a line pattern produced from the position information undergone averaging process and producing an approximate pattern based on the corrected position information. CONSTITUTION:The features of an original pattern are extracted via the broken line approximation of all curvature functions and an approximate error correcting part 4 corrects an approximate curve based on the approximate curve obtained by said extraction of features and the original pattern. In other words, the positions shifts DELTAx and DELTAy are obtained between the end point of the approximate curve and the original pattern. Then these shift values DELTAx and DELTAy obtained at the end point are distributed proportionally in response to the start point and each flexure point. Thus the position of each flexure point is corrected. In such a way, the position correction is carried out, based on the approximate error between the flexure points or intersecting points of approximate curves. Thus it is possible to obtain the approximate curves that regenerate more faithfully the features of the original pattern.
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