Line laser based Researches on a Three-dimensional Measuring system

Three-dimensional measuring technique has been used widely in many trades and professions. In order to overcome the defects of traditional laser measuring system for large volume and high cost, this paper builds a low cost line laser measuring system. Scanning experiment of multiple objects by using line laser system is carried out, surface are well recovered to verify the accuracy of the system algorithm. To further enhance the efficiency of the measuring system, the line laser image processing algorithm is improved. We comprehensively consider the combination of the threshold iterative extremum method and the weighted gray center of gravity method to extract the center of the laser stripe to select the appropriate threshold to determine the effective gray value range of the centerline. The object to be measured is placed in the range of 400mm to 700mm in front of the distance line laser measuring system. The experimental results validate the feasibility of the scheme. It has wide applicability and feasibility for scanning and measuring different objects.