发明授权
US5054091A Method for determining coordinates of circumscribed rectangular frame of
each character for use in optical character reader
失效
用于确定用于光学字符读取器的每个字符的圆形矩形框架的坐标的方法
- 专利标题： Method for determining coordinates of circumscribed rectangular frame of each character for use in optical character reader
- 专利标题（中）： 用于确定用于光学字符读取器的每个字符的圆形矩形框架的坐标的方法
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申请号： US510895申请日： 1990-04-18
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公开(公告)号： US5054091A公开(公告)日： 1991-10-01
- 发明人: Hideaki Tanaka , Toshiaki Morita , Yoshihiro Kitamura , Hitoshi Hirose , Yasuhisa Nakamura , Hisashi Saiga
- 申请人： Hideaki Tanaka , Toshiaki Morita , Yoshihiro Kitamura , Hitoshi Hirose , Yasuhisa Nakamura , Hisashi Saiga
- 申请人地址： JPX Osaka
- 专利权人： Sharp Kabushiki Kaisha
- 当前专利权人： Sharp Kabushiki Kaisha
- 当前专利权人地址： JPX Osaka
- 优先权： JPX1-99371 19890418
- 主分类号： G06K9/34
- IPC分类号： G06K9/34 ; G06T7/60
摘要：
A method determines coordinates of a circumscribed rectangular frame for enclosing each character based on image data of character images in a recognition area. First of all, specified image data of a predetermined data unit in a transverse direction including at least one bit of black pixel are determined by scanning the image data. Thereafter, top and bottom coordinates of a circumscribed rectangular frame are determined respectively by searching respective image data located at the top and bottom positions among plural image data including at least one bit of black pixel located on the upper and lower sides of the specified image data, wherein respective bits of black pixel of plural image data are substantially continuously connected in a longitudinal direction, and then, leftmost and rightmost coordinates of the circumscribed rectangular frame are determined based on histogram data composed of either logical products or logical sums of respective bits in the transverse direction.