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US 7,072,398 B2Granted
System and method for motion vector generation and analysis of digital video clips
OwnerKai-Kuang Mainventor
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Abstract
Given a digital video clip, this invention describes how to efficiently compute the motion vectors and motion trajectory of each identified video object for facilitating various commonly encountered visual applications, such as video compression for transmission and archiving, security and surveillance monitoring, and search-by-query required in the Internet search engine or digital library.
Claims10
A scalable block-matching fast motion estimation method for analyzing a plurality of video frames comprising:
- employing at least one block-matching fast motion estimation algorithm profile selected for use with a predetermined application, selected input data and a determined processing mode;
- utilizing available neighboring motion vectors from a spatial and/or temporal domain to form a motion adaptive pattern or an adaptive rood pattern for performing an initial search of each pixel block of the plurality of video frames;
- conducting a local search of the plurality of video frames using a small diamond search pattern;
- conducting an adaptive threshold pre-judgment for detecting no motion blocks in the plurality of video frames;
- computing a local motion activity at each block position of the plurality of video frames;
- computing a global motion activity for each video frame;
- adapting a search range for each block of each video frame;
- predicting a search center for each block;
- and estimating motion in the plurality of video frames.
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Dependencies are inferred from the claim text.