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Modified local variance-based vehicle queuing length measurement method and measurement system

A technology of local variance and queuing length, applied in the field of traffic information, can solve the problems of low stability of edge detection operators, inability to achieve effective detection of full-color vehicles, and inability to complete vehicle patch detection. Rich and effective detection, stable detection effect

Active Publication Date: 2017-10-20
SUZHOU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

From the detailed explanation of the formula in its patent specification, it can be seen that the local variance is essentially an edge detection operator, and the edge detection operator is not stable. It can only complete the outline of a part of the vehicle, and cannot complete the overall plaque of the vehicle. detection
Moreover, this method is only effective for dark-colored vehicles, and cannot effectively detect full-colored vehicles.

Method used

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  • Modified local variance-based vehicle queuing length measurement method and measurement system
  • Modified local variance-based vehicle queuing length measurement method and measurement system
  • Modified local variance-based vehicle queuing length measurement method and measurement system

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Embodiment 1

[0069] A vehicle queuing length measurement system based on corrected local variance is disclosed in Embodiment 1, the system includes: an image acquisition module, a fleet detection module, and a fleet length measurement module, wherein the image acquisition module is used to collect images to be inspected; The fleet detection module is used to detect the acquired images to be inspected, and the fleet detection module includes: a modified double local variance fleet detection module for preliminary detection of fleet plaques, a dual local variance fleet detection module for effective detection of fleet edges A valued edge strength detection module, a fleet detection morphological optimization module for removing the influence of adjacent lane shadows; the fleet length measurement module converts the fleet length in the image into the actual fleet length.

Embodiment 2

[0071] The measurement method in embodiment 2 is based on the measurement system in embodiment 1, as figure 1 As shown, the method includes the following steps:

[0072] S 1 acquires a video frame as an image to be checked;

[0073] S 2 Use a method based on corrected local variance to detect the acquired image to be inspected. The image to be inspected is a fleet. First complete the preliminary detection of the fleet plaque, then effectively detect the edge of the fleet, and finally remove the vehicle in the adjacent lane. The influence of shadows on fleet plaques in the lane to be inspected enriches the effective detection of fleet plaques;

[0074] S 3 converts the length of the fleet patch in the image into the length of the actual fleet, and completes the measurement of the vehicle queue length.

[0075] Usually, at the moment when the signal light at the intersection turns from red to green, the queuing vehicles are relatively stationary and the distance between the fr...

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Abstract

The invention discloses a modified local variance-based vehicle queuing length measurement method. The method comprises the following steps that: S1, a video frame is obtained and is adopted as an image to be detected; S2, a modified local variance-based method is adopted to detect the obtained image to be detected, wherein the image to be detected is a vehicle queue, primary detection of a vehicle queue spot is completed at first, and then, a vehicle queue edge is effectively detected, and finally, the influence of vehicle shadows in adjacent lanes on the vehicle queue spot of a lane to be detected is removed, so that the effective detection of the vehicle queue spot is enriched; and S3, the length of the vehicle queue spot in the image is converted into the length of an actual vehicle queue, and vehicle queuing length measurement is completed. The modified local variance-based vehicle queuing length measurement method of the invention has the advantages of stable performance and full detection results, and can realize the effective detection and length measurement of vehicle queues.

Description

technical field [0001] The invention relates to the technical field of traffic information, in particular to a vehicle queuing length measurement method based on corrected local variance. Background technique [0002] In recent years, with the rapid development of the national economy and the rapid increase of motor vehicles, my country's urban traffic problems have become increasingly severe, with traffic congestion and frequent accidents. How to establish an effective intelligent traffic system ITS (Intelligent Traffic System) within and between cities, and how to quickly conduct traffic monitoring, traffic dispatching and traffic control have become urgent problems to be solved. [0003] ITS is a comprehensive, real-time, comprehensive traffic management system established by effectively integrating advanced information technology, communication technology, sensor technology, control technology, and computer technology into the entire traffic management system. Accurate,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08G1/01G06K9/00
CPCG08G1/0104G06V20/46G06V20/52
Inventor 程成夏振平胡伏原马健
Owner SUZHOU UNIV OF SCI & TECH
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