基于3D-motif法的刮研表面形貌表征OA北大核心CSTPCD

In response to the lack of quantitative characterization methods of surface morphology in the study of microscopic properties and functional mechanism of scraped surfaces,the 3D-motif method was used to characterize the scraped surface morphology.The scraped surface was measured by using LI-3 contact three-dimensional surface morphology measuring instrument,and the two-dimensional grayscale image of the scraped surface was generated by three-dimensional point cloud data.Then,according to the definition of catchment basin in 3D-motif method,the motif segmentation and merging for the grayscale image of scraped surface were conducted by using watershed algorithm.Taking the overall texture region motif segmentation results of scraped surfaces with different precision levels as the object,the feature saliency was defined,and six motif parameters,including depth,area,direction angle,anisotropy rate,flatness coefficient and feature saliency,were extracted and calculated for the scraped surface on two different area scales(25 mm2 and 0.25 mm2).Combined with the distribution of some motif parameters and the change trend of the number of motif,the scraped surface was characterized and analyzed from the dimension and morphology of the morphological features,achieving the complete characterization of the three-dimensional morphology of the scraped surface with fewer parameters.The results can provide a theoretical basis for further analysis of the microscopic properties of scraping surfaces.