Invention Grant
- Patent Title: Video noise reduction
- Patent Title (中): 视频降噪
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Application No.: US11765029Application Date: 2007-06-19
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Publication No.: US08031967B2Publication Date: 2011-10-04
- Inventor: Cha Zhang , Zhengyou Zhang , Zicheng Liu
- Applicant: Cha Zhang , Zhengyou Zhang , Zicheng Liu
- Applicant Address: US WA Redmond
- Assignee: Microsoft Corporation
- Current Assignee: Microsoft Corporation
- Current Assignee Address: US WA Redmond
- Agency: Lyon & Harr, LLP
- Agent Richard T. Lyon
- Main IPC: G06K9/40
- IPC: G06K9/40

Abstract:
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.
Public/Granted literature
- US20080317371A1 VIDEO NOISE REDUCTION Public/Granted day:2008-12-25
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