パラメータ ヘイメン オ モチイタ インカン ガゾウ ノ ニンシキ

Seal-imprint verification is very important work in Japanese society. It is usually practiced by a clerk in charge of seal-imprint verification. Its computerization must be very valuable. Two preprocessings are required for automatic seal-imprint verification. The first is normalization of position, in which the centers of two seal-imprints are correctly superimposed. The second is normalization of rotation angle, in which two seal-imprints are correctly rotated so as the characters in them stand perpendicularly. In this paper, a new method for the second normalization using a parameter plane is proposed. As the experimental result, this method is about 4.5 times faster than the usual method