A Method of Measuring Road Distance from Video Based on One-dimensional Direct Linear Transformation
To solve the disputes on road rights caused by the invasion of traffic width by different traffic participants in the mixed traffic network,a method for measuring road surface distance in videos based on direct linear transformation theory is proposed.This method uses a one-dimensional direct linear transformation algorithm and relies on three characteristic points in the video that are collinear with the point to be measured to determine the direct linear transformation relationship between the image-side distance and the object-side distance,and then calculate the target distance.The measurement errors of this method are evaluated using the measurement values obtained from on-site scanning by Faro Focus3D laser 3D scanner.Experimental results demonstrate that this method can effectively measure the road distance in videos,with a measurement accuracy reaching the centimeter level,and it is equally applicable to video images taken from different shooting angles.The application of this method can determine the traffic width of different parties involved in accidents in the mixed traffic network through video images,providing technical support for judicial appraisal and accident handling.
direct linear transformation theoryvideodistance measurementlaser 3D scannertraffic accident
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