发明授权
US5754312A Method of and apparatus for detecting pixels constituting dotted image
area utilizing distance between change points of pixel values
失效
用于利用像素值的变化点之间的距离来检测构成点图像区域的像素的方法和装置
- 专利标题： Method of and apparatus for detecting pixels constituting dotted image area utilizing distance between change points of pixel values
- 专利标题（中）： 用于利用像素值的变化点之间的距离来检测构成点图像区域的像素的方法和装置
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申请号： US558187申请日： 1995-11-15
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公开(公告)号： US5754312A公开(公告)日： 1998-05-19
- 发明人: Masaya Fujimoto , Haruo Yamamoto , Masayuki Mizuno , Hidechika Kumamoto , Shinji Hayashi
- 申请人： Masaya Fujimoto , Haruo Yamamoto , Masayuki Mizuno , Hidechika Kumamoto , Shinji Hayashi
- 申请人地址： JPX Osaka
- 专利权人： Mita Industrial Co., Ltd.
- 当前专利权人： Mita Industrial Co., Ltd.
- 当前专利权人地址： JPX Osaka
- 优先权： JPX6-288443 19941122; JPX6-288444 19941122
- 主分类号： H04N1/40
- IPC分类号： H04N1/40
摘要：
Disclosed is an apparatus for detecting pixels in a dotted image area (dotted area pixels). Image data corresponding to each of the pixels is coded into one of a predetermined number of discrete values. The distance between change points at which the value of the pixel after the coding is changed from a first value to a second value is detected. Further, it is examined whether or not periodicity is recognized in the distance between the change points in the vicinity of a target pixel. If periodicity is recognized in the distance between the change points, it is judged that the target pixel may constitute a dotted image area.
公开/授权文献
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