GPU accelerated video texture updating method during video three-dimensional fusion

A technology of video texture and 3D fusion, which is applied in the fields of video codec, video GIS and high-performance processing. It can solve the problems of small number of videos and low rendering efficiency of 3D GIS scenes, and achieve the effect of releasing calculation pressure and facilitating observation.

Active Publication Date: 2021-08-03
WUHAN UNIV
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Problems solved by technology

However, the existing methods for updating video textures in 3D GIS scenes and multi-video fusion are mainly based on traditional CPU processing, which will occupy resources with the 3D rendering system, resulting in reduced rendering efficiency of 3D GIS scenes, and the existing methods can be integrated into 3D GIS at the same time The number of videos in the scene is small

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  • GPU accelerated video texture updating method during video three-dimensional fusion
  • GPU accelerated video texture updating method during video three-dimensional fusion
  • GPU accelerated video texture updating method during video three-dimensional fusion

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Embodiment Construction

[0062] In order to make the object, technical scheme and advantages of the present invention clearer, the present invention will be further described below in conjunction with the accompanying drawings and specific implementations. Here, only the suitability examples of the present invention are used to illustrate the present invention, but not as the present invention. limit.

[0063] The key point of the present invention is to transfer the computationally intensive and highly repetitive work of video texture update to the GPU, and use the GPU to parallelly accelerate the operations of video decoding, post-processing and video texture update in the video texture update.

[0064] Such as figure 1 As shown, the traditional video texture update method based on CPU processing increases with the increase of the number of simultaneously fused videos in the 3D GIS scene, and the rendering efficiency of the 3D GIS scene gradually decreases, and when the number of simultaneously fuse...

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Abstract

The invention provides a GPU (Graphics Processing Unit) accelerated video texture updating method during video three-dimensional fusion. According to the method, a video stream data set is constructed, the visibility of correspondingly fused video textures of each video in a three-dimensional GIS scene is judged, the visible videos are subjected to GPU hard decoding and a CUDA acceleration-based YUV 2RGB algorithm to obtain single-frame RGB format video images corresponding to each video, and meanwhile, the CUDA acceleration is utilized to correct distorted video images, and further a preprocessed video image of each video is obtained, the preprocessed video image is copied to an OpenGL memory space from a CUDA memory space, and finally each preprocessed video image is stored as a two-dimensional video texture array and fusing the two-dimensional video texture array to a three-dimensional GIS scene by using a projection texture algorithm. According to the method, the calculation pressure of a CPU is greatly released, the rendering efficiency of the three-dimensional GIS scene is ensured, the number of videos which can be fused at the same time by the three-dimensional GIS scene is greatly increased, and a user can conveniently observe the whole monitoring area from the global perspective.

Description

technical field [0001] The invention relates to the fields of video codec, video GIS and high-performance processing, in particular to a GPU-accelerated video texture update method during three-dimensional video fusion. Background technique [0002] Expressway intelligence and intelligence are the development direction of the current road transportation, and it is an inevitable requirement to realize efficient, safe and green transportation on the road. Video surveillance system is a comprehensive application of multimedia technology, computer network, industrial control, artificial intelligence and other technologies. It is an important part of the general security system because of its intuitive convenience and rich information content. Video images have the characteristics of wide sources, flexible information acquisition methods, and convenient real-time transmission, and can provide real-time dynamic, multi-angle, and multi-directional monitoring site information. [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T17/05G06T15/04G06T9/00G06T5/50G06T1/20
CPCG06T17/05G06T15/04G06T9/00G06T1/20G06T5/50G06T2207/10016G06T2207/20221G06T2207/30232
Inventor 付仲良李刚何健
Owner WUHAN UNIV
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