非下采样Contourlet变换在表面形貌评定中的应用  

The Application of Nonsubsampled Contourlet Transform in Surface Topography Evaluation

作　　者：炊明伟[1] 冯有前[2] 王崴[1] 李正朝 徐晓东[1] 

机构地区：[1]空军工程大学防空反导学院,西安710051 [2]空军工程大学理学院,西安710051 [3]解放军洛阳外国语学院,洛阳471003

出　　处：《表面技术》2013年第1期123-126,共4页Surface Technology

基　　金：国家自然科学基金资助项目(51075395)

摘　　要：针对高斯滤波、小波滤波等方法在三维表面形貌分析中存在的不足,提出了一种基于非下采样Contourlet变换的三维表面形貌分析方法。该方法是先通过非下采样Contourlet分解变换,将三维表面形貌分解成不同尺度的子带;然后根据滤波截止波长,确定表面形貌不同成分所属的分解子带层数;最后通过非下采样Contourlet重构变换,重构表面形貌的不同成分。针对实际测量的三维表面形貌进行了分析,验证了该方法的有效性。Aiming at the defects of the Gaussian filter and Wavelet filter, the nonsubsampled contourlet transform was applied in the 3 D surface topography evaluation. 3 D surface topography was divided into different scales subbands, and the subbands belonging to roughness, waviness and shape components were determined by the filter cut-off wavelength, and then the different components were generated by nonsubsampled eontourlet inverse transform. At last, a actual measurement of 3 D surface topography were analyzed to verify the effectiveness of the proposed method.

关 键 词：三维表面形貌 非下采样CONTOURLET变换 表面评定 

分 类 号：TG84[金属学及工艺—公差测量技术]