关键词: 三维表面, 图像重构, 显微镜, 数学形态学

Abstract: For the 3D surface topography of wear debris, the depth of field of microscope has a significant influence on the formation of image. In this paper, a comparison quick method is proposed to compare in focus part and out of focus part of the images by image processing technology, which makes the 3D measure doesn’t be affected by costly instrument. The method uses differential filter operators to extract the focal plane scope from frame images which are extracted from video. The morphological method is used in a small area to eliminate the discontinuity within the focal plane area and expand the scope focal plane. It makes the focal plane which is impossible detected can get better treatment. Boolean algebra algorithm makes the differential focal plane images reconstruct a complete wear particle image. This method can overcome the disadvantages of Scanning Electronic Microcopy（SEM） which can only get the gray images. Through applying the proposed method in this paper, color surface texture of wear debris can be gained.

Key words: 3D surface topography, image merging, microscope, mathematical morphology