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介绍焊缝射线底片分级系统中缺陷识别的三种滤噪预处理方法,即改进的σ滤波算法、非均质扩散算法以及基于形态学的M滤波算法。采用这些算法对底片图象进行预处理,得到了明显的滤噪效果。
This paper introduces three kinds of noise and noise pretreatment methods of defect identification in the classification system of weld ray negative film, that is, improved σ filtering algorithm, heterogeneous diffusion algorithm and morphological M filtering algorithm. Using these algorithms to pretreatment of the negative images, the obvious filtering and noise effect has been obtained.