发明名称 |
Non-local mean-based video denoising method and apparatus |
摘要 |
The present disclosure provides a non-local mean-based video denoising method, so as to remove illumination variation in a video by using image histogram specification filtering processing. The present disclosure further provides a non-local mean-based video denoising apparatus. The apparatus comprises a filtering module used for remove illumination variation in a video by using image histogram specification filtering processing. In the present disclosure, self-adaptive adjustment can be carried out on a change of an illumination condition. |
申请公布号 |
US9471964(B2) |
申请公布日期 |
2016.10.18 |
申请号 |
US201514639542 |
申请日期 |
2015.03.05 |
申请人 |
PEKING UNIVERSITY;PEKING UNIVERSITY FOUNDER GROUP CO., LTD.;BEIJING FOUNDER ELECTRONICS CO., LTD. |
发明人 |
Ren Jie;Liu Jiaying;Guo Zongming;Zhuo Yue |
分类号 |
G06K9/34;G06T5/00;G06T5/40;G06K9/46 |
主分类号 |
G06K9/34 |
代理机构 |
Brinks Gilson & Lione |
代理人 |
Brinks Gilson & Lione |
主权项 |
1. A non-local mean-based video denoising method wherein a video includes illumination variation, the method comprising:
removing by a processor the illumination variation in the video through image histogram specification filtering processing comprising: constructing a local image block with a pixel to be processed in a current frame as the center, designating a search area as a search window in the current frame with the pixel to be processed as the center, and establishing corresponding search windows for corresponding areas in various other frames in a three-dimensional search space, those various search windows forming a three-dimensional search space;
constructing a local image block with a pixel i in a frame fn as the center; andconstructing a search window wn larger than the local image block with the pixel i as the center, and constructing a search window at a corresponding location in each of k preceding and succeeding frames respectively to obtain a set of search windows {wn−k, . . . , wn−1, wn, . . . wn+k}, which forms a three-dimensional search space Ω; and taking the search window of the current frame as a reference, performing a histogram specification filtering process on search windows corresponding to various other frames in the three-dimensional search space to obtain a three-dimensional search space with invariant illumination. |
地址 |
Beijing CN |