Automobile body left-right height difference detection device and method based on stereoscopic vision

Abstract

The invention relates to an automobile body left-right height difference detection device and method based on stereoscopic vision, and belongs to automobile safety performance detection equipment. The device comprises two cameras of the same model, a gantry support, an industrial control computer and the like. According to the device, a set of cameras are used for collecting vehicle tail images when vehicle tail brake lamps are turned on, a computer image processing technology is adopted for segmenting and extracting the outlines of the vehicle tail brake lamps, two-dimensional coordinates of the outlines of the brake lamps are reconstructed, and the two-dimensional coordinates of the outlines of the brake lamps are obtained by extracting the centroids of the outlines of the brake lamps. And calculating the absolute value of the longitudinal coordinate difference of the contour centroids of the brake lamps on the left and right sides to obtain the left-right height difference of the vehicle body. According to the invention, the left-right height difference of the automobile body can be obtained under the non-contact condition. The method is novel and unique in design concept, good in detection precision, simple in device structure and convenient to install and operate. The research result has certain theoretical value and practical value, and has good application and popularization prospects.

Description

technical field [0001] The device of the invention belongs to detection equipment for automobile safety performance, and in particular relates to a detection device and method for height difference between left and right of an automobile body based on stereo vision. Use two cameras to collect the rear image of the vehicle when the rear brake light is on, use computer image processing technology to segment and extract the contour of the rear brake light, reconstruct the two-dimensional coordinates of the rear brake light contour, and calculate the brake light contour The centroid, by calculating the absolute value of the longitudinal coordinate difference of the centroid of the left and right brake light contours, and then obtain the height difference between the left and right of the vehicle body. The device has the characteristics of high detection precision and good system reliability, fast detection speed, strong repeatability, simple structure and reasonable design, and re...

AI Technical Summary

Problems solved by technology

However, this method is difficult to detect red vehicles, and artificially controlling the pan-tilt to find a symmetrical point will cause large errors and slow detection speed

[0004] At present, there is no efficient device for detecting the left and right height difference of the automobile body. With the development of digital image processing technology, a detection device for the left and right height difference of the automobile body based on stereo vision has been developed to detect the left and right height difference of the automobile body.

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