这是关于水平集工具箱的一些功能演示，包括PPT，视频，对初学者使用该工具箱提供便利，值得推荐。-This is about the level of some of the features of the toolbox set presentation, including the PPT, video, for beginners to facilitate the use of the toolbox, it is recommend.

cntrd: calculates the centroid of bright spots to sub-pixel accuracy. Inspired by Grier & Crocker s feature for IDL, but greatly simplified and optimized for matlab INPUTS: im: image to process, particle should be bright spots on dark

这个程序可以对KSVD进行综合测试。首先，会产生一个随机的正交字典，会产生一个ＫＳＶＤ算法输入，这个输入是一个数据信号集合，每个元素都是三维元素的线性组合。-In this file a synthetic test of the K-SVD algorithm is performed. First, a random dictionary with normalized columns is being generated, and then a set of data signal

C. Li, R. Huang, Z. Ding, C. Gatenby, D. N. Metaxas, and J. C. Gore, "A Level Set Method for Image Segmentation in the Presence of Intensity Inhomogeneities with Application to MRI", IEEE Trans. Image Processing, vol. 20 (7), pp. 2007-2016