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Heatmap Generation Method

A heat map and video image technology, applied in the field of generation and processing of local heat maps, can solve the problems of long processing time, difficult to obtain population distribution information, large amount of data, etc., and achieve the effect of reducing the amount of processing

Active Publication Date: 2020-01-07
广东兆邦智能科技股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the amount of data in this method is relatively large, and the processing time is long. It is not easy to process in real time for large scenes with dense crowds, and only the number of people in the field of view can be obtained, and population distribution information is not easy to obtain.

Method used

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Experimental program
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Embodiment approach

[0039] According to one embodiment, the steps of obtaining the candidate circle are as follows: (1) map all pixels in the target image to the parameter space (a, b, r); (2) set the parameter accumulator array A, any An array element A(a,b,r) indicates the number of pixels falling on a circle with (a,b) as the center and r as the radius; the initial value of A(a,b,r) is 0 ;The greater the value of A(a,b,r), the greater the possibility of the existence of a circle with (a,b) as the center and r as the radius, so it is necessary to find the largest A(a,b,r); (3) For each pixel point (x, y) in the target image, when r is continuously valued at a certain step size, use the following formula to calculate the values ​​of a and b: a=x-rcosθb=y-rsinθ where, θ represents the gradient direction angle of each pixel in the target image. Since the gradient direction angle of each pixel in the edge image of the video frame is known, θ is known; r∈(rmin,rmax), r is continuous with a certain s...

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Abstract

The invention relates to a method for generating a heat map. The method includes: a video image obtaining step of obtaining a video image of a monitoring area; a sampling point determining step of determining a plurality of sampling points to be sampled; a sampling point population density determining step of determining each sampling point The population density of the point; the fitting step, according to the obtained population density of each sampling point, through data fitting, the population density of the entire monitoring area is obtained.

Description

technical field [0001] The invention relates to the generation of population heat maps, in particular to the generation and processing of local area heat maps. Background technique [0002] Big data population heat map research takes the behavior of population groups as the research object, and uses parameters such as population distribution density and population flow to analyze group behavior characteristics. From a macro perspective, it can study urban population management, urban construction, traffic planning, etc. Graph research is mainly used to solve local population density, danger warning, population distribution, population diversion, etc., to increase social security and reduce accidents. [0003] The research method of population heat map collects population information through technical means such as video images and electronic information, and then performs technical processing to obtain an intuitive population distribution image in the form of heat map. [0...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/00G06K9/34G06K9/46G06K9/62G06T11/20
CPCG06T11/206G06V20/53G06V10/267G06V10/443G06V10/507G06F18/213
Inventor 赵拥军吴希文周肖树熊利平
Owner 广东兆邦智能科技股份有限公司