发明授权
- 专利标题: Video noise reduction
- 专利标题(中): 视频降噪
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申请号: US11765029申请日: 2007-06-19
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公开(公告)号: US08031967B2公开(公告)日: 2011-10-04
- 发明人: Cha Zhang , Zhengyou Zhang , Zicheng Liu
- 申请人: Cha Zhang , Zhengyou Zhang , Zicheng Liu
- 申请人地址: US WA Redmond
- 专利权人: Microsoft Corporation
- 当前专利权人: Microsoft Corporation
- 当前专利权人地址: US WA Redmond
- 代理机构: Lyon & Harr, LLP
- 代理商 Richard T. Lyon
- 主分类号: G06K9/40
- IPC分类号: G06K9/40
摘要:
A video noise reduction technique is presented. Generally, the technique involves first decomposing each frame of the video into low-pass and high-pass frequency components. Then, for each frame of the video after the first frame, an estimate of a noise variance in the high pass component is obtained. The noise in the high pass component of each pixel of each frame is reduced using the noise variance estimate obtained for the frame under consideration, whenever there has been no substantial motion exhibited by the pixel since the last previous frame. Evidence of motion is determined by analyzing the high and low pass components.
公开/授权文献
- US20080317371A1 VIDEO NOISE REDUCTION 公开/授权日:2008-12-25
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