发明授权
- 专利标题: Recovering parameters from a sub-optimal image
- 专利标题(中): 从次优图像中恢复参数
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申请号: US11747695申请日: 2007-05-11
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公开(公告)号: US08009880B2公开(公告)日: 2011-08-30
- 发明人: Zhengyou Zhang , Zicheng Liu , Gang Hua , Yang Wang
- 申请人: Zhengyou Zhang , Zicheng Liu , Gang Hua , Yang Wang
- 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, L.L.P.
- 代理商 Craig S. Fischer
- 主分类号: G06K9/00
- IPC分类号: G06K9/00 ; G06K9/56 ; G09G5/00
摘要:
A subregion-based image parameter recovery system and method for recovering image parameters from a single image containing a face taken under sub-optimal illumination conditions. The recovered image parameters (including albedo, illumination, and face geometry) can be used to generate face images under a new lighting environment. The method includes dividing the face in the image into numerous smaller regions, generating an albedo morphable model for each region, and using a Markov Random Fields (MRF)-based framework to model the spatial dependence between neighboring regions. Different types of regions are defined, including saturated, shadow, regular, and occluded regions. Each pixel in the image is classified and assigned to a region based on intensity, and then weighted based on its classification. The method decouples the texture from the geometry and illumination models, and then generates an objective function that is iteratively solved using an energy minimization technique to recover the image parameters.
公开/授权文献
- US20080279423A1 RECOVERING PARAMETERS FROM A SUB-OPTIMAL IMAGE 公开/授权日:2008-11-13
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