A Study Of 3D Profile Measuring Based On Laser Detecting

Today, the application of Machine Vision have attracted more and more attention. The triangle law,which has been adopted extensively, is difficult to determine the internal and external parameter of the camera. For this reason ,the study adopted another simple and wonderful vision detecting method——mapping function method. In the process, we has finished some work and brought some innovation as following:1,Carried on deep research and discussion to the mapping function method, and achieved the vision measures algorithms with program, and demonstrated the algorithms'feasibility and validity .2,Designed and developed a suit of vision detecting sensor by self, and bring the designing key elements of every component of the sensor.3,To obtain the accurate localization between every component in the sensor , develop a whole set of design procedure, write the corresponding software to measure in real time , guarantee the final precision of the sensor.4,Carry on further investigation on some key technology of the vision measuring . Provide the method to draw the centre of the laser stripe. Utilize hough transform and the least square linear regression, obtain the center of the laser cross curve , achieve the subpixel measuring, improve the precision of measuring greatly.By our vision sensor, we build up the relationship between the space coordinates and the camera image coordinates with the mapping function method, and accomplished the 3D profile measuring finally, Then analyze the final precision of measuring by surfcer software.