Local motion vector correction method in memc technology
A technology of local motion vector and motion vector, applied in the field of image processing, can solve problems such as insufficient visual experience, and achieve the effect of improving visual experience, avoiding local fragmentation, and reducing local fragmentation.
Active Publication Date: 2018-03-16
青岛信芯微电子科技股份有限公司
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However, in some scenes, only local motion estimation is not effective. After the whole frame fallback (reverting to the original input frame or the weighted result of the original frame, not the interpolation result of motion estimation and motion compensation), although the possible fragmentation caused by incorrect motion estimation is avoided, but The visual experience is still not good enough
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[0039] 1) Select a fixed area, with the current block as the center, including the range of 5x5 blocks;
[0040] 2) Obtain the motion vectors and SADs thereof of these 25 blocks, and use SAD to measure the accuracy of the motion vectors in this example;
[0041] 3) these 25 motion vectors are screened, and reliable motion vectors are selected; a threshold value can be set, and motion vectors with small SAD values can be considered as reliable motion vectors; the selection method is not limited to the methods enumerated in the present embodiment ;
[0042] 4) The motion vector obtained in step 3) can be weighted according to reliability to obtain the final replacement vector;
[0043] 5) Judging whether the motion vector of the current block is reliable, the judgment is determined with reference to the convergence status in the local small area including the current block;
[0044] 6) Assuming that the local small area is 7x7, count the convergence of these 49 blocks, for e...
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The present invention provides a method for correcting local motion vectors in MEMC technology, comprising steps as follows: 1) specifying the range of a certain fixed area around it for each block; 2) obtaining the motion vectors of all blocks in the range and the motion vectors of the motion vectors Accuracy; 3) select and calculate a reliable motion vector from these motion vectors as a replacement motion vector; 4) analyze and judge whether the motion vector of the current block is reliable, and calculate a weighted average coefficient; 5) use the weighted average coefficient A new motion vector is obtained by weighting the original motion vector of the block and its replacement motion vector as the final motion vector of the current block. The algorithm of the present invention can replace bad motion vectors by using relatively good motion vectors around when the local motion search is not good enough, and the interpolation frames generated by using smooth motion vectors have better visual effects and can easily cover up phenomena such as broken pictures .
Description
technical field [0001] The present invention relates to image processing technology, more specifically, to a local motion vector correction method in MEMC technology. Background technique [0002] Motion estimation and motion compensation (MEMC) technology is a frame rate conversion technology commonly used at present, and it is applied to video systems such as TV devices. This technology can effectively eliminate or improve the jitter and smearing problems of moving pictures . Motion estimation is one of its key technologies. The interpolated frames generated by correct motion estimation results can give a good visual experience, but wrong motion estimation results will affect the viewing effect, which is worse than the original jitter. The effect of motion estimation is closely related to the scene content of the original frame. There are many scenes where the correct motion search results cannot be obtained under the general MEMC technology, such as complex motion, small...
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IPC IPC(8): H04N19/513
Inventor 姜建德余横袁嘉林刘广智马琰
Owner 青岛信芯微电子科技股份有限公司