各向异性尺度空间图象增强

Anisotropic Scale－space in Image Inhancement

文章讨论了各向异性热传导系数尺度空间理论在图象增强中的应用。尺度空间的生成可以通过热传导方程来获得，传统的理论采用各向同性的热传导系数。为了在对图象噪声进行平滑的同时，保持图象的细节，采用了各向异性的热传导方程。考虑到旋转不变性，对各向异性的热传导方程的计算方法进行改进，不仅考虑了垂直和水平方向的影响，而且考虑对角方向上象素点的影响。实验证明算法是有效的。

： The scale－space technique introduced by Witkin and Hummel may equivalently viewed as the solution of the isotropic diffusion equation．To avoid the drawback of traditional scale－space filter，the anisotropic diffusion equation is presented here．And to improve the performance of the anisotropic diffusion equation，the rotation invariance is taken into consideration．Finally，the experiment on synthetic image and real IVUS image is presented for the efficiency of the algorithm．