公开(公告)号：US4317109A

公开(公告)日：1982-02-23

申请号：US140448

申请日：1980-04-17

申请人： Kazumi Odaka ,  Isao Masuda

发明人： Kazumi Odaka ,  Isao Masuda

IPC分类号： G06K9/62 ,  G06K9/80 ,  G06K9/46

CPC分类号： G06K9/80

摘要： The present system comprises (a) a character input unit for providing the coordinates of a plurality of points of an input character, (b) a pre-process unit for normalizing the size and the position of said input character, (c) three points approximate unit for providing three feature points for each stroke of the input character, (d) a reference pattern storage for providing the coordinates of the feature points for each stroke of the reference characters, (e) a stroke difference calculator for providing the sum p.sub.i of the length between the feature points of the k'th stroke of the input character and the feature points of the i'th stroke of the j'th reference character, (f) a storage for storing the stroke difference p.sub.i, (g) means for operating the members (e) and (f) repetitively for all the strokes of the j'th reference character, (h) means for detecting the minimum value p.sub.min among the stroke difference p.sub.i thus obtained, (i) means for operating the members (e), (f), (g) and (h) repetitively for all the strokes of the input character, and accumulating the value p.sub.min to provide the value d.theta. .sub.j, which is the pattern difference between the input character and the j'th reference character, (j) a storage for storing the value d.theta..sub.j , (k) means for operating the members (i), and (j) repetitively for all the reference characters to provide the set of d.theta..sub.j for the given input character, and (l) means for detecting the minimum value among the values d.theta..sub.j and determining the input character as the reference character which provides the minimum value of d.theta..sub.j.

摘要翻译： 本系统包括：（a）用于提供输入字符的多个点的坐标的字符输入单元，（b）用于对所述输入字符的大小和位置进行归一化的预处理单元，（c）三个点 用于为输入字符的每个笔划提供三个特征点的近似单位，（d）用于提供参考字符的每个笔画的特征点的坐标的参考图案存储器，（e）笔划差值计算器，用于提供和pi 输入字符的第k行的特征点与第j个参考字符的第i行的特征点之间的长度，（f）存储行程差pi，（g） 用于重复地对第j个参考字符的所有笔划操作成员（e）和（f）的装置，（h）用于检测由此获得的笔画差值pi之中的最小值pmin的装置，（i） 成员（e），（f），（g）和（h）代表 对于输入字符的所有笔划，并累加值pmin以提供作为输入字符和第j个参考字符之间的模式差的值dθj，（j）用于存储值d的存储器 θj，（k）用于对所有参考字符重复地操作成员（i）和（j）的装置，以为给定的输入字符提供dθj的集合，以及（l）用于检测最小值的装置 值dθj，并将输入字符确定为提供d theta j的最小值的参考字符。

公开(公告)号：US4284975A

公开(公告)日：1981-08-18

申请号：US98813

申请日：1979-11-30

申请人： Kazumi Odaka

发明人： Kazumi Odaka

IPC分类号： G06K9/62 ,  G06K9/20 ,  G06K9/46 ,  G06K9/80

CPC分类号： G06K9/80

摘要： A pattern recognition system operating on an on-line basis for hand-written characters, in particular for hand-written Chinese characters comprises a character input unit for providing the coordinates of a plurality of points on the strokes of a written input character, a classification unit for classifying the input characters to the first group having equal to or less than three strokes, and the second group having equal to or more than four strokes, an approximate unit for providing a plurality of feature points to each of strokes, the number of strokes being six for each stroke in the first group of characters and three for each stroke in the second group of characters, a pattern difference calculator for providing the sum of the length between the feature points of the input character and those of the reference characters which are stored in the reference pattern storage, and a minimum difference detector for determining the minimum length among the pattern differences thus calculated. The input character is recognized to be the same as the reference character which provides said minimum length.

摘要翻译： 用于手写字符，特别是手写汉字的在线操作的图案识别系统包括用于提供写入的输入字符的笔画上的多个点的坐标的字符输入单元，分类 用于将输入字符分类为具有等于或少于三个笔画的第一组的单元，以及具有等于或大于四笔画的第二组，用于向每个笔画提供多个特征点的近似单元， 在第一组字符中的笔画为6笔，在第2组字符中为每个笔画3笔，用于提供输入字符的特征点与参考字符的特征点之间的长度之和的模式差分计算器， 存储在参考图案存储器中，并且最小差分检测器用于确定因此计算的图案差异中的最小长度 吃了 输入字符被识别为与提供所述最小长度的参考字符相同。

公开(公告)号：US5940534A

公开(公告)日：1999-08-17

申请号：US679957

申请日：1996-07-15

申请人： Toru Wakahara ,  Naoki Nakajima ,  Sueharu Miyahara ,  Kazumi Odaka

发明人： Toru Wakahara ,  Naoki Nakajima ,  Sueharu Miyahara ,  Kazumi Odaka

IPC分类号： G06K9/22 ,  G06K9/64 ,  G06K9/00

CPC分类号： G06K9/6206 ,  G06K9/00416 ,  G06K9/00429

摘要： Reference patterns and an input pattern are expressed by the position coordinates of feature points obtained by approximating strokes by a predetermined points in advance. One-to-one stroke correspondences whose stroke-numbers are made equal to each other between reference pattern and the input pattern having different stroke-numbers and different stroke-orders each other are determined, and handwriting distortion is stably absorbed by performing an optimum affine transformation operation for each corresponding stroke pair. The inter-pattern distance between a normalized input pattern obtained by the affine transformation operation and the reference pattern is calculated, and the character categories of the reference patterns are sequentially output as candidate categories in order of increasing distance.

摘要翻译： 参考图案和输入图案由预先通过预定点逼近笔画获得的特征点的位置坐标表示。 确定笔划编号在参考图形和具有不同笔画数和不同行程顺序的输入图案之间彼此相等的一对一笔画对应，并通过执行最佳仿射来稳定地吸收笔迹失真 对每个相应的行程对进行转换操作。 计算通过仿射变换运算获得的归一化输入图案与参考图案之间的图案间距离，并且以增加距离的顺序依次输出参考图案的字符类别作为候选类别。