Method for detecting vehicle congestion

A vehicle congestion and vehicle technology, which is applied in traffic flow detection, image analysis, image enhancement, etc., can solve the problems of high energy consumption, long time consumption, and high parameter accuracy requirements, and achieves high efficiency, fast speed, and simple judgment method Effect

Active Publication Date: 2020-09-15
ZHEJIANG TIANBO CLOUD TECH OPTOELECTRONICS CO LTD
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Problems solved by technology

The calculation of this patent is too complicated, takes a long time, takes a lot of energy, and requires high accuracy of parameters

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  • Method for detecting vehicle congestion
  • Method for detecting vehicle congestion

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Embodiment 2

[0039] The difference between this embodiment and Embodiment 1 is that: step (d) in the detection area, if the vehicle is not detected for 50 consecutive frames, it indicates that the vehicle has left the detection area. Reason: If the detection rate is 0.5, then the probability of not detecting the vehicle for 50 consecutive frames is 0.5 50 , the probability is very small.

Embodiment 3

[0041] In described step (b), the mode that this vehicle is tracked can adopt existing mode, but in the present embodiment, specific mode is as follows:

[0042] (b0) Collect infrared image models of vehicles under different weather conditions, carry out learning and training through algorithms, and obtain network models for recognition. This step can be set as required.

[0043] (b1) Through the method of deep learning, the type recognition is carried out on the images in the detection area acquired by the passive infrared thermal imager, all vehicles and types are detected, the outer edge of the vehicle is marked, and the center coordinates (x, y) of the vehicle are calculated and The length and width of the vehicle (h, w);

[0044] (b2) Analyzing all vehicles identified in the previous N frames of images, and all vehicle information in the identified current frame images, wherein N is an adjustment parameter, and the value range of N is 1

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Abstract

The present invention relates to the technical field of vehicle detection, in particular to a method for detecting vehicle congestion, comprising the following steps: (a) selecting a detection area with a length of 200 meters, and using a passive infrared thermal sensor with a frame rate of 25 frames per second The imager acquires images in the detection area; (b) if the same vehicle is detected in 5 frames in the detection area, it indicates that the vehicle has entered the detection area and the vehicle is tracked; (c) in the detection area , the congestion judgment is as follows: (c1) If the number of frames that the vehicle appears in the detection area is less than 300 frames, it indicates that the detection area passes smoothly; (c2) if 500 frames > the number of frames that the vehicle appears in the detection area > 300 frames , indicating that the detection area is passing slowly; (c3) If the number of frames of the vehicle in the detection area is >500 frames, it indicates that the detection area is congested. The judging method of the invention is simple, accurate, fast and efficient.

Description

technical field [0001] The invention relates to the technical field of vehicle detection, in particular to a method for detecting vehicle congestion. Background technique [0002] The judgment of traffic congestion is mainly given by manual observation and detection of video, and the output result is considered. [0003] In order to achieve automatic judgment, there are currently many detection methods for road congestion. For example, the application number is: 201510904467.3, and the name is "A Method and System for Judging Traffic Congestion Based on Video". This method needs to extract feature points and calculate vehicle speed. The queue length is calculated according to the characteristic points, and traffic congestion is judged by the relationship between vehicle speed, queue length and the set threshold. The calculation of this patent is too complicated, takes a long time, takes a lot of energy, and requires high accuracy of parameters. Contents of the invention ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G08G1/04G06T7/246G06K9/62
CPCG06T7/246G08G1/04G06T2207/30236G06T2207/10016G06V2201/08G06F18/24
Inventor 梁川袁杰
Owner ZHEJIANG TIANBO CLOUD TECH OPTOELECTRONICS CO LTD
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