A video matching method based on motion vector projection matrix in h.264/avc compressed domain

A technology of motion vector and projection matrix, which is applied in the field of video processing, can solve problems such as not considering the time characteristics of video sequences, and achieve the effect of reducing computational complexity and ensuring robustness

Inactive Publication Date: 2017-12-15
陕西帮你电子科技有限公司
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Problems solved by technology

This method only utilizes the spatial information in the I frame and does not consider the temporal characteristics of the video sequence

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  • A video matching method based on motion vector projection matrix in h.264/avc compressed domain
  • A video matching method based on motion vector projection matrix in h.264/avc compressed domain
  • A video matching method based on motion vector projection matrix in h.264/avc compressed domain

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Embodiment Construction

[0049] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0050] Such as figure 1 As shown, the present invention provides a kind of H.264 / AVC compression domain video matching method based on motion vector projection matrix, this method extracts motion vector by partial decoding at first from the compressed bit stream of H.264 / AVC; Carry out time-domain averaging processing on the vector; perform space-domain averaging processing on the motion vector matrix after time-domain processing; generate a random matrix with the same size as the motion vector matrix after space-domain averaging processing and obey the Gaussian distribution; move the motion vector The matrix is ​​projected onto a Gaussian random matrix; the projected result is quantified to generate a video signature; the video signature is used for video matching and retrieval, and the video that best matches the query video in the video library is obtained. The sp...

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Abstract

The present invention provides a H.264 / AVC compressed domain video matching method based on motion vector projection matrix. The invention discloses an H.264 compressed domain video matching method of a vector projection matrix, belonging to the field of video processing. In this method, the motion vectors extracted from the H.264 compressed code stream are averaged in time domain and space domain, and then projected onto a Gaussian random matrix, and quantized by quartiles to form a video signature. Video signature for video matching and retrieval not only saves the step of completely decompressing the video, but also effectively reduces the computational complexity and saves a lot of retrieval time under the condition of ensuring a good matching effect.

Description

technical field [0001] The invention belongs to the field of video processing, and relates to a compression-domain video matching method, in particular to an H.264 / AVC (Advanced Video Coding) compression-domain video matching method based on a motion vector projection matrix. Background technique [0002] Nowadays, due to the rapid development of network communication technology and multimedia technology, digital multimedia has been widely used in many fields such as advertising, entertainment, education, and medicine. Numerous applications have led to a rapid increase in the amount of digital video. How to effectively manage a huge video library and efficiently retrieve video data that matches the target video from a large number of video libraries has become a very important research topic. At present, most of the stored or transmitted videos appear in compressed form. Direct processing and analysis in the compressed domain can avoid the complicated full video decoding pr...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/513H04N19/593H04N19/533
Inventor 王萍李平黄华
Owner 陕西帮你电子科技有限公司
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