公开(公告)号：US08965141B2

公开(公告)日：2015-02-24

申请号：US13721551

申请日：2012-12-20

申请人： Thomson Licensing

发明人： Wen Fei Jiang ,  Fan Zhang ,  Zhi Bo Chen

IPC分类号： G06K9/40 ,  G06T5/00

CPC分类号： G06K9/40 ,  G06T5/002 ,  G06T2207/20028 ,  G06T2207/20192

摘要： A method and an apparatus for image filtering are described. Structural information is employed during the calculation of filtering coefficients. The structural information is described by the regions defined through an edge map of the image. In one embodiment, the region correlation between the target pixel and a contributing pixel is selected as a structural filtering coefficient. The region correlation, which indicates the possibility of two pixels being in the same regions, is calculated by evaluating the strongest edge cut by a path between the target pixel and a contributing pixel. The structural filtering coefficient is further combined with spatial information and intensity information to form a spatial-intensity-region (SIR) filter. The structural information based filter is applicable to applications such as denoising, tone mapping, and exposure fusion.

摘要翻译： 描述了用于图像滤波的方法和装置。 在滤波系数的计算过程中采用结构信息。 结构信息由通过图像的边缘图定义的区域描述。 在一个实施例中，选择目标像素和贡献像素之间的区域相关性作为结构滤波系数。 通过评估通过目标像素和贡献像素之间的路径的最强边缘切割来计算指示两个像素在相同区域中的可能性的区域相关性。 结构滤波系数进一步与空间信息和强度信息相结合，形成空间强度区域（SIR）滤波器。 基于结构信息的滤波器适用于去噪，色调映射和曝光融合等应用。