运动估计（Motion Estimation）

大力水手（Popeye）

已于 2024-06-21 13:31:17 修改

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文章标签： computer vision

于 2024-03-25 07:25:48 首次发布

本文链接：https://blog.youkuaiyun.com/qq_41679546/article/details/137000325

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本文探讨了运动估计的过程，特别是H.264/MPEG-4AVC标准中定义的运动向量，以及运动估计与光学流、图像注册和立体对应的概念关联。介绍了匹配度测量和像素直接法（如块匹配算法和经典的光流法）与特征间接法（如基于特征的运动估计）的区别。

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Motion estimation： is the process of determining motion vectors that describe the transformation from one 2D image to another.

Motion vecctor:
The H.264/MPEG-4 AVC standard defines motion vector as:
A 2-D vector used for inter prediction that provides an offset from the coordinates in the decoded picture to the coordinates in a reference picture

Related Terms:
Generally, the term motion estimation and the term optical flow are used interchangeably. It is also related in concept to Image registration and stereo conrespondence.
in fact all of these refer to the process of finding corresponding points between two images or video frames

Matching metric:
It is a measurement of how similar two image points are. There is no right or wrong about it. the choice of matching metric is usually related