Method and device for tracking region of interest in video

Abstract

The invention discloses a method and a device for tracking a region of interest in a video. The method for tracking the region of interest in the video comprises the steps: first, obtaining motion vectors of pixels or macro blocks in an existing frame, confirming distributed parameters of the movement speed of the region of interest (ROI) according to the motion vectors, confirming ROI scaling parameters according to the ROI state in a reference frame, utilizing the distributed parameters of the movement speed of the ROI and the scaling parameters to perform state transition to particles obtained through sampling in the existing frame, and confirming the ROI position and the ROI size of the existing frame according to the particles after the state transition. The method and a device for tracking the region of interest in the video can utilize motion vector information which exists in compressed code flows or is generated in encoding to guide the state transition process of the particles, accordingly can decrease required particle number in the tracking process under the condition that the tracking effect is ensured, further reduce the complexity level of tracking processing, and can have good tracking effect.

Description

technical field [0001] The present invention relates to the technical field of video processing, in particular to a method and device for tracking a region of interest during video processing. Background technique [0002] With the popularization and development of communication technology, corresponding video services such as mobile TV, video conferencing, and video surveillance have also developed rapidly. In the process of users accessing and developing corresponding video services through various terminals and different access methods, the diversity of user terminals and the complexity of the network environment make how to effectively transmit video content a huge challenge in the design of video service systems. challenge. [0003] At present, SVC (Scalable Video Coding) technology can effectively transmit corresponding video content to a certain extent. SVC technology is to simultaneously encode sub-streams of various code rates, resolutions, and frame rates in a co...

AI Technical Summary

Problems solved by technology

[0019] In the above implementation scheme, to obtain a stable tracking effect, a larger number of particles is required, and the larger th

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