发明授权
- 专利标题: Degradation restoration system, degradation restoration method and program
- 专利标题(中): 降解恢复系统,降解恢复方法和程序
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申请号: US14233973申请日: 2012-06-21
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公开(公告)号: US09280807B2公开(公告)日: 2016-03-08
- 发明人: Takashi Shibata , Akihiko Iketani , Shuji Senda
- 申请人: Takashi Shibata , Akihiko Iketani , Shuji Senda
- 申请人地址: JP Tokyo
- 专利权人: NEC Corporation
- 当前专利权人: NEC Corporation
- 当前专利权人地址: JP Tokyo
- 代理机构: Wilmer Cutler Pickering Hale and Dorr LLP
- 优先权: JP2011-159564 20110721
- 国际申请: PCT/JP2012/065921 WO 20120621
- 国际公布: WO2013/011797 WO 20130124
- 主分类号: G06K9/40
- IPC分类号: G06K9/40 ; G06T5/00 ; H04N5/217
摘要:
For each pixel of an input image, a direction toward which variation in pixel value between the relevant pixel and its peripheral pixels is largest and an amount of the variation in pixel value are computed, where a direction unit vector that indicates the direction toward which the variation is largest and a variation vector that represents the amount of the largest variation in the pixel value are computed. For each pixel, a regularization strength is computed utilizing the direction unit vector, the variation vector, and a regularization strength computing formula so that the larger the amount of the variation in pixel value toward a direction indicated by the direction unit vector, the less the regularization strength. An optimization function is determined based on the input image and the regularization strength for each pixel thereof and assigns a value for each pixel, by which the determined optimization function has the minimum value, to the corresponding pixel of a restored image to be generated.
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