发明授权
- 专利标题: Image processing apparatus using two-dimensional space frequency to discriminate image type
- 专利标题(中): 图像处理装置使用二维空间频率来区分图像类型
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申请号: US437310申请日: 1989-11-17
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公开(公告)号: US5018024A公开(公告)日: 1991-05-21
- 发明人: Hiroshi Tanioka
- 申请人: Hiroshi Tanioka
- 申请人地址: JPX Tokyo
- 专利权人: Canon Kabushiki Kaisha
- 当前专利权人: Canon Kabushiki Kaisha
- 当前专利权人地址: JPX Tokyo
- 优先权: JPX58-244162 19831226; JPX58-244163 19831226; JPX58-244164 19831226
- 主分类号: H04N1/40
- IPC分类号: H04N1/40 ; H04N1/41
摘要:
A image processing apparatus capable of faithfully reproducing half tone image, line image and dot image by distinguishing the nature of the original image. The image is discriminated by the distribution of its spatial frequency.