Image processing technique of free-form surface

Based on vision inspection technique, the measurement system for measuring complexity free form surface is developed. For getting the high-accuracy object surface, subpixel subdivision technology is studied. For the sake of the data got from the measurement are scatted measuring points, modeling technique for triangular meshes should be used. The basic idea of the approach based on Bezier interpolation can be expressed. A practical algorithm for free form surface reconstruction combining Bezier triangulation modeling and NURBS rectangular modeling is proposed. In 3-D digital image modeling the merging of depth images is one of the key techniques, which directly affects the quality of depth image merging. The multi-view image data processing is introduced. Serve the turbine blade as the object, with coordinate measuring machine, the demonstrations of the designed measuring system and the image processing method are proved. The results indicate that the studied method of the paper is high accuracy, speediness practicality characteristics for measuring the complexity free form surface.