Stereoscopic vision based acquisition method of congestion degree of bus passenger flow

A technology of stereo vision and acquisition method, which is applied in traffic flow detection, image data processing, instruments, etc., can solve problems that have not been applied, meet real-time and accuracy requirements, solve perspective and occlusion overlap, and improve anti-interference sexual effect

Inactive Publication Date: 2010-05-26
上海交通投资信息科技有限公司
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Problems solved by technology

In the existing public transport system, passenger flow congestion collection technology has not been applied

Method used

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  • Stereoscopic vision based acquisition method of congestion degree of bus passenger flow
  • Stereoscopic vision based acquisition method of congestion degree of bus passenger flow
  • Stereoscopic vision based acquisition method of congestion degree of bus passenger flow

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[0020] The method and system for automatically counting bus passenger flow based on the two-line parallax space-time diagram of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0021] Such as figure 1 , 2 As shown, the bus passenger flow congestion acquisition method based on stereo vision uses a binocular synchronous video image acquisition module, a disparity calculation module B2, a foreground object generation module B3, a foreground object mapping module B4, and a congestion degree estimation module B5. The eye-synchronous video image acquisition module is composed of the on-site binocular stereo camera A and the image acquisition module B1. The disparity calculation module B2 includes the disparity image calculation and background disparity image pre-storage module. Image update module composition. The left and right cameras A1 and A2 shoot the scene of passenger flow. The scene can be a small-scale crowde...

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Abstract

The invention relates to a stereoscopic vision based acquisition method of the congestion degree of bus passenger flow, comprising the following steps of: (1) obtaining a left synchronous video image and a right synchronous video image by a left parallel synchronous camera and a right parallel synchronous camera, and processing left and right synchronous video image sequences by a synchronous video image collection module; (2) computing a parallax image of a passenger flow scene by a parallax computation module according to the left and right synchronous video image sequences, and prestoring a background parallax image; (3) judging the sort of a current frame by a foreground object generation module according to the frame difference motion characteristic of the passenger flow scene, dynamically updating the parallax image of a background frame, and computing the parallax image of a foreground object in the scene according to a foreground frame; (4) carrying out position mapping for the foreground object by a oreground object mapping module so as to obtain a ground plane mapping image of the foreground object; (5) carrying out object characteristic statistics for the ground plane mapping image by a congestion degree estimation module, obtaining a congestion degree estimation value according to an object area and an edge characteristic; and repeatedly and circularly executing the steps from step (1) to the step (5) to complete the real-time collection of the congestion degree of the passenger flow.

Description

technical field [0001] The invention relates to a method for collecting the crowding degree of bus passenger flow, in particular to a method for collecting the crowded degree of bus passenger flow based on stereo vision. This method uses stereo vision technology to extract passenger flow foreground objects, map the two-dimensional ground plane, and estimate the scene congestion degree, which is especially suitable for the collection of passenger flow congestion degree in complex scenes such as buses and bus stops. Background technique [0002] The urban public transportation system is an important part of the entire transportation system, which has the advantages of large transportation volume, intensive operation, saving energy and road space, and little environmental pollution. Major cities at home and abroad have successively proposed strategies to give priority to the development of urban public transportation and accelerate the realization of informatization and intelli...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08G1/01G06T7/00
Inventor 朱秋煜陆克澎周静陈岳川方标新官远智韩锦成唐利江毅凭
Owner 上海交通投资信息科技有限公司
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