Taxi identifying method and system based on high-definition video

Abstract

The invention discloses a taxi identifying method and a taxi identifying system based on a high-definition video. The method mainly consists of the steps of target feature extraction, pattern classifier designing, taxi tracking and the like. Firstly, foreground regions are divided accurately in the high-definition surveillance video, each foreground region is severed as a goal and goal features such as three-dimensional sizes, car roof marks and car body colors are calculated. Then a pattern classifier is designed to identify a taxi efficiently with utilizing the features. Finally, the identified taxi is tracked continuously until the identified taxi travels out an effective detection area and repetitive identification of the taxi can be avoided. The invention further discloses the system based on the high-definition video. The system comprises a high definition camera, a fill-in light and an industrial personal computer. The taxi identifying method and the taxi identifying system based on the high-definition video overcomes the defect in taxi identifying aspect of existing vehicle type recognition. The taxi identifying method and the taxi identifying system based on the high-definition video is powerful support to city taxi management and dispatch and has obvious engineering application value.

Description

technical field [0001] The invention belongs to the technical field of intelligent video monitoring and intelligent transportation, in particular to a method and system for identifying taxis based on high-definition video. Background technique [0002] With the development of video surveillance technology, cameras have been widely used to monitor various environments, areas and places. With the development of technology, many intelligent video surveillance systems have been produced, which improve the monitoring efficiency while saving manpower. At present, in terms of intelligent monitoring of traffic scenes, functions such as traffic data collection, license plate recognition, and traffic incident detection have been realized, and related products have entered the stage of large-scale application. As a sub-function of traffic data collection, vehicle type recognition can detect and classify vehicles automatically and in real time, and as a basis for traffic charging, mana...

AI Technical Summary

Problems solved by technology

[0005] Chinese Invention Patent CN201010105668.4 "A Fast Model Identification Method under Video Surveillance Mode" uses the special color tone of the vehicle to identify taxis from small cars. This method requires that the color tone of the taxi is single and the range is known. This assumption is very May not be realistic, for example, taxis in Beijing and Guangzhou have multiple colors, or even a taxi contains two main colors

[0006] From the development status of existing technologies, it can be seen that video-based taxi recognition is still an unsolved problem, and no mature technology has emerged.

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