pca-提取主成分，降维，压缩图像数据量，简化下一步的处理；

小波检测—该程序通过小波系数的提取、重构检测出图像的边缘；

其它的均为图像分割的代码，包含形态学分水岭的一些算法，与Ostu等算法。-pca-extraction of principal components, reduce　dimensions, compress image data, to simplify further processing

Wavelet detection- the program by extracting wavelet coefficients to reconstruct detect the edge of the image

The others　are image segmentation algorithm which consists of some morphological watershed, and Ostu algorithm.