关键词: 特种纸纸病, P-M方程, 并行迭代扩散, 对称多处理（SMP）系统, 多线程技术

Abstract: A fast image filtering algorithm based on Perona and Mailik’s anisotropic diffusion model is put forward for solving the problem that the requirement for specialty paper defects detecting can not be met in the existing methods. Perona and Mailik’s anisotropic diffusion model is adopted to protect those subtle edges of specialty paper defects while images for paper being filtered. With the help of SMP system and multi-threading technology, Perona and Mailik’s anisotropic diffusion is performed by the parallel iterative algorithm to ensure the rapidity of image filtering algorithm for specialty paper defects detection. Experimental result shows that adopting this method, subtle edges of specialty paper defects are able to be detected and the real-time performance of this method is significantly better than the traditional implementation of Perona and Mailik’s anisotropic diffusion model filtering.

Key words: specialty paper defects, Perona and Mailik’s anisotropic diffusion, parallel iterative diffusion, Symmetrical Multi-Processing（SMP） system, multi-threading technology