Measuring method for length, width and height of vehicle based on RGB-D camera

Abstract

The invention discloses a measuring method for length, width and height of a vehicle based on an RGB-D camera. The method comprises the steps of acquiring a clear vehicle image in a camera short-distance mounting manner, calibrating the camera according to a calibrating method based on a disappearing point, obtaining an internal parameter and an external parameter of the camera, realizing three-dimensional point cloud conversion of a vehicle target in a world coordinate system through a camera depth image solution, and acquiring three-dimensional coordinate information of the external surfaceof the vehicle; acquiring the three-dimensional coordinate of the external surface of the vehicle by means of prior knowledge and an image processing method, splicing a vehicle image according to sequence patterns in a vehicle motion process through a registering method, and realizing three-dimensional measurement to the profile of the vehicle. The measuring method overcomes defects of high equipment requirement and tedious operation in a traditional method and realizes high calibration precision. The actual displacement of the vehicle is comprehensively analyzed through a matching relation ofpoints which correspond with the same position of the vehicle in the image sequence, thereby realizing relatively high registering precision. The measuring method further has advantages of realizingaccurate splicing of the vehicle side surfaces, reducing vehicle length measurement error and improving accuracy in splicing the vehicle side surfaces.

Description

technical field [0001] The invention belongs to the field of intelligent transportation, and in particular relates to a method for measuring vehicle length, width and height dimensions based on an RGB-D camera. Background technique [0002] The automatic recognition technology of vehicle length, width and height is one of the key technologies in the field of ITS (Intelligence Transportation System, Intelligent Transportation System). It mainly collects the original video of the vehicle, and uses image processing technology and image correlation algorithm to realize the vehicle outline size. Measurement. The three-dimensional size of the vehicle outline can effectively help realize the accurate identification of the vehicle, thereby promoting the development and improvement of the intelligent transportation system (ITS). [0003] The over-length, over-width and over-height of vehicles are one of the important hidden dangers of unsafe accidents in traffic scenes. At present, ...

AI Technical Summary

Problems solved by technology

[0003] The over-length, over-width and over-height of vehicles are one of the important hidden dangers of unsafe accidents in traffic scenes. At present, the security inspection line, comprehensive inspection line and overrun monitoring station of the vehicle management station basically measure the shape of the vehicle by manual measurement. length, width and height, labor intensity is high, and there are problems such as injustice and cheating caused by human factors

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