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Global encoding method and system for urban traffic surveillance video

A monitoring video and global encoding technology, applied in the field of urban traffic monitoring video encoding, can solve the problem of urban monitoring data redundancy

Active Publication Date: 2017-09-29
WUHAN UNIV
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AI Technical Summary

Problems solved by technology

Various types of urban vehicles with similar, identical, and long-term stability are repeatedly captured by surveillance cameras all over the city, resulting in a large amount of urban surveillance data redundancy

Method used

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  • Global encoding method and system for urban traffic surveillance video
  • Global encoding method and system for urban traffic surveillance video
  • Global encoding method and system for urban traffic surveillance video

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specific Embodiment approach

[0128] The specific implementation of the three-layer knowledge dictionary construction of this step is as follows:

[0129] (1) The first layer of knowledge dictionary construction, that is, the construction of the common visual texture information knowledge dictionary of all types of global moving vehicles.

[0130] The common visual texture information knowledge dictionary of all types of moving vehicles is constructed by sparse coding, and the cost function is as follows:

[0131]

[0132] Among them, D 1 Represents the first layer of knowledge dictionary; C represents the number of types of global moving vehicles, c represents the type number of global moving vehicles; y c Represents the common visual texture information of global moving vehicles, that is, the texture information of all types of global moving vehicles; a 1 Indicates the coding coefficient; τ is the balance factor, which is set according to the actual situation and experience, the larger the τ, the sp...

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Abstract

The invention discloses a method and system for global encoding of an urban traffic surveillance video. The method comprises the steps of segmenting the original surveillance video into a vehicle video and a vehicle-removed video, encoding the vehicle-removed video through the optional differential encoding method, extracting a global feature parameter set of global moving vehicles in the vehicle video, and carrying out global encoding on the vehicle video based on global feature parameters. According to the method and system, global redundancy in the surveillance video is removed on the basis of removing scene redundancy, and therefore the efficiency of encoding and compression of the urban traffic surveillance video is effectively improved.

Description

technical field [0001] The invention belongs to the technical field of urban traffic monitoring video coding, and in particular relates to a global coding method and system for urban traffic monitoring video. Background technique [0002] The goal of video signal compression coding technology is to represent video information with as few bits as possible under the premise of ensuring a certain reconstruction quality. The traditional video coding method based on Shannon information theory starts from the signal processing level, uses pixels and blocks as the basis, adopts a hybrid coding framework that combines transformation, prediction, and entropy coding, and improves compression performance by mining the spatiotemporal redundancy of the image and video signal itself. However, most of the current video compression technologies are oriented to non-specific applications. In recent years, video compression technologies developed for the characteristics and needs of specialize...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/527H04N19/103H04N19/90H04N7/18
CPCH04N7/18
Inventor 胡瑞敏马民生肖晶胡金晖尹黎明
Owner WUHAN UNIV
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