Method and system for object tracking in video compression domain

Abstract

The invention discloses a video compression domain target tracking method. The method comprises the following steps: extracting compression domain information corresponding to a first frame in a videosequence from a video bit stream that is obtained through compression coding of the video sequence, decoding the compression domain information to obtain a decoded image, and carrying out manual target marking on the image to obtain a target marking diagram of the first frame; carrying out parsing on the video bit stream so that a motion vector (MV) and a block coding mode corresponding to a frame next to a current frame in the video sequence are extracted from the video bit stream, and sequentially carrying out normalization processing and preprocessing on the obtained MV to obtain a processed MV of the next frame; and obtaining a target marking diagram of the next frame through a spatial-temporal Markov model. The method provided by the invention has the advantages that the technical problems in the conventional compression domain target tracking method that block level coding processing leads to low tracking accuracy and that as the number of the frames unceasingly increases, the tracking accuracy decreases frame by frame in a continuous and free-fall manner are solved.

Description

technical field [0001] The invention belongs to the technical field of image processing and pattern recognition, and more particularly relates to a method and system for object tracking in a video compression domain. Background technique [0002] Video object tracking is a research hotspot in computer vision. It provides support for video analysis, video retrieval, and behavior understanding. It has increasingly extensive research value and application prospects in military guidance, human-computer interaction, and medical diagnosis. [0003] Current video object tracking methods include video object tracking methods based on pixel domain and video object tracking methods based on compressed domain. For the latter, the currently commonly used video target tracking method is to use motion vectors (Motion vectors, MV for short) and block coding modes (Block coding modes) from compressed bit streams to perform tracking, [0004] However, the above video object tracking methods...

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Problems solved by technology

[0005] In view of the above defects or improvement needs of the prior art, the present invention provides a video compression domain object tracking method and system, the purpose of which is to solve the low tracking accuracy caused by block-level coding processing in the existing compression domain object tracking method , and the technical problem that the tracking accuracy rate continues to decline frame by frame with the continuous increase of the number of frames

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