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3D coverage rate calculation method suitable for multi-view-point video monitoring system

A technology of multi-view video and calculation method, applied in the field of three-dimensional coverage calculation, can solve the problems of discussion, no vertical coverage, no universality, etc., and achieve the effect of simple calculation, easy use and high algorithm efficiency

Inactive Publication Date: 2016-09-28
CHINA UNIV OF GEOSCIENCES (WUHAN)
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Problems solved by technology

However, the current coverage calculation method for corner coverage has many limitations. The camera model and the coverage object do not use the 3D model at the same time, and the monitoring direction is specialized, and the coverage in the vertical direction is not discussed.
[0004] In summary, the existing coverage calculation methods either do not conform to the actual situation, or are not universal, and are difficult to apply to multi-view video surveillance systems

Method used

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  • 3D coverage rate calculation method suitable for multi-view-point video monitoring system
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  • 3D coverage rate calculation method suitable for multi-view-point video monitoring system

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Embodiment Construction

[0023] The present invention will be described in detail below in conjunction with specific examples, but the protection scope of the present invention is not limited to the following examples.

[0024] In this embodiment, the monitoring object can be generalized into a cuboid whose length, width and height are 2a*2b*H according to the actual situation (such as a shopping mall building). The 3D directed camera model is defined as a five-element array C i (n i ,α i ,β i ,λ i ,γ i ). where n i =(x i ,y i ,z i ) is the spatial coordinate of monitoring node i; α i is the monitoring direction vector Angle with the Z axis (also known as the pitch angle), β i is the angle between the projection of the direction vector on the X-Y plane and the X axis; λ i and gamma i are the viewing angles of the monitoring direction vector in the vertical direction and the horizontal direction, respectively. 3D directional camera model such as figure 1 shown. R in the figure i is t...

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Abstract

The invention discloses a 3D coverage rate calculation method suitable for a multi-view-point video monitoring system, comprising steps of establishing a 3D camera model according to camera parameters, determining whether the camera can effectively cover a cuboid-shaped model coverage object, projecting the camera and the cuboid-shaped model coverage object in a horizontal plane under a condition that effective coverage can be performed, performing calculation on a 3D coverage angle formed between the camera and the cuboid-shaped model coverage object, performing calculation through obtaining an union set of coverage angles of a plurality of cameras to solve a set of 3D coverage rates for the coverage object by a set of cameras. The cameras and the coverage objects are 3D models which conform to a practical condition. The input of the coverage rate calculation method includes the given coverage object and related parameters of the camera. The 3D coverage rate calculation method is easy to implement and calculate, high in calculation efficiency and easy to use, and is universal and general.

Description

technical field [0001] The invention belongs to the field of multimedia sensor networks, in particular to a three-dimensional coverage calculation method suitable for a multi-viewpoint video monitoring system. Background technique [0002] Video surveillance system has attracted more and more people's attention, and has also become a hot spot in the current academic field. Most current research assumes that a coverage object can be covered by a single monitoring node. But it is not universal in practical application scenarios. When the coverage object is so large that a single monitoring node can only cover a part of the object, multiple nodes are required to complete the monitoring of the coverage object, that is, multi-viewpoint monitoring. In order to reduce the energy consumption required to complete the monitoring of covered objects, it is necessary to find out the set of monitoring nodes with the fewest nodes or the minimum redundancy, and the premise of completing t...

Claims

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Application Information

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IPC IPC(8): H04N7/18
CPCH04N7/181
Inventor 熊永华伍成静赖旭芝
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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