Motion vector post-processing based frame rate up-conversion method

Abstract

The invention provides a motion vector post-processing based frame rate up-conversion method. According to the method, firstly, forward and backward motion estimations are performed on an original video frame, so as to obtain a forward motion vector and a backward motion vector, and abnormal values of the forward motion vector and the backward motion vector are modified based on prediction; bidirectional candidate motion vectors are selected based on minimum sum of absolute differences (SAD); then, different smoothing methods are adopted for bidirectional motion vectors of different positions; vector extrapolation is performed on an edge block and four corner blocks firstly, a distance-based weighting smoothing method is adopted for unreliable motion vectors , the candidate vectors of a middle block are selected based on the direction and magnitude of the motion vector of an adjacent block, and a final vector of a to-be-interposed block is selected from the candidate vectors based on the minimum SAD; and finally, an interpolation frame is obtained by use of bidirectional motion compensation of overlapped blocks. Through adoption of the frame rate up-conversion method, the problems of holes and shielding of the interpolation frame can be solved effectively, phenomena of motion blur and shaking can be eliminated, and the visual effect of the constructed interpolation frame is improved.

Description

technical field [0001] The invention relates to a method for increasing the video frame rate, belonging to the field of video image processing. Background technique [0002] Frame rate enhancement technology is a technology that uses the time and space correlation of adjacent frames in the original video frame sequence to generate new video frames and insert them into the original video frames to increase the frame rate of the original video. The higher the video frame rate, the more pictures played per unit time, the weaker the flickering when the pictures alternate, and the smoother and more delicate the picture reproduced. A high frame rate can result in smoother and more realistic animations, and the more frames per second, the smoother the displayed motion and the better the texture of the picture. Therefore, it is very necessary to find a frame rate improvement technology. [0003] Frame rate improvement techniques can be divided into two categories: one is to simply...

AI Technical Summary

Problems solved by technology

[0004] In order to obtain more accurate motion vectors and solve the problem of interpolation frame block effect and motion blur caused by inaccurate motion vectors in the frame rate increase, the present invention proposes a new motion vector post-processing scheme, which is used for edge blocks and four-corner blocks and the middle block use different smoothing methods

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