very useful matlab code for image processing

segment :http://www.peterkovesi.com/projects/segmentation/

other:
1 、MATLAB and Octave Functions for Computer Vision and Image Processing

 http://www.csse.uwa.edu.au/~pk/Research/MatlabFns/index.html 

2、爱丁堡大学

http://home.eps.hw.ac.uk/~ceeyrp/WWW/Teaching/B39SD2/B39SD2.html 

3、Reproducible Research in Computational Science

http://www.csee.wvu.edu/~xinl/source.html

4、大牌图像处理学习

http://www.grip.unina.it/

5、otsu

http://www.biomecardio.com/matlab/otsu.html