Vehicle type recognition method based on inverse projection three views

A car model recognition and back projection technology, which is applied in character and pattern recognition, image analysis, image data processing, etc., can solve the problem of not being able to obtain the real data of the detected vehicle, and achieve the effect of broad application prospects

Active Publication Date: 2016-11-23
CHANGAN UNIV
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Problems solved by technology

In addition, such methods cannot obtain the real data of the detected vehicle in vehicle identification

Method used

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  • Vehicle type recognition method based on inverse projection three views
  • Vehicle type recognition method based on inverse projection three views
  • Vehicle type recognition method based on inverse projection three views

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Embodiment

[0106] refer to figure 1 , the picture is a real-time traffic video image of a road section in Xi'an, the sampling frequency of the video is 25 frames per second, the image size is 1280*720, the height of the camera is 8 meters, the vehicle detection area is the first lane on the left, the camera The calibration takes the orthocenter of the camera on the ground as the origin of coordinates, and the direction of the vehicle as the positive direction of the Y axis. figure 1 The rectangle box in (a) in (a) marks the detected vehicle, and the corresponding figure 1 (b) is the three-dimensional wireframe of the detected vehicle, where the left boundary of the three-dimensional wireframe is -7.9m, the right boundary is -4.9, the lower boundary is 12.3m, and the upper boundary is 19.31m. figure 2 It is the detection map of the chassis contour line; image 3 It is the back projection view of the front and side of the vehicle; Figure 4 Detect the front and side back projection veh...

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Abstract

The invention discloses a vehicle type recognition method based on inverse projection three views. The vehicle type recognition and vehicle modeling method based on the inverse projection three views is not limited by hardware environment, can extract out three-dimension structure information and true size data of a vehicle to be tested and can accurately determine the vehicle type of the vehicle to be tested. Furthermore, a vehicle three-dimension wireframe model can be constructed according to the extracted vehicle structure matched with the inverse projection three views. In addition, the method cannot be affected by vehicle shadow, can accurately and stably recognize the vehicle types according to the three-dimension structure of the vehicle to be tested and is wide in application prospect.

Description

technical field [0001] The invention belongs to the field of video detection, in particular to a vehicle identification method based on back projection three-view. Background technique [0002] The automatic vehicle identification technology is one of the key technologies of the ITS (Intelligence Transportation System) system. It mainly collects the original image of the vehicle through the vehicle identification system, and uses the corresponding image processing algorithm to analyze, process and obtain the relevant information of the vehicle. Finally, the corresponding intelligent data management is carried out. No matter in the field of real-time monitoring of traffic road conditions, or in the field of automatic toll collection of vehicles at airports, stations, and toll stations, vehicle type recognition technology has a wide range of applications. [0003] Traditional vehicle identification methods mainly include ground sensing coil detection method, infrared detectio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00G06K9/32G06K9/62G06T7/00
CPCG06V20/584G06V20/62G06V10/751G06V2201/08
Inventor 张朝阳闻江李钢李婵李莹
Owner CHANGAN UNIV
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