中文说明：这个算法是基于二值图像的，所使用的软件是matlab。本算法对二值图像的轮廓进行提取，包括四邻域的轮廓提取与八邻域的轮廓提取。并给出了matlab处理时像素的链码表示法，也有称之为Freeman链码。本算法所有的轮廓都是用链码表示的，也可以用链码表示像素画图。
English Description：
This algorithm is based on a binary image, the software is used by MATLAB. The contour extraction algorithm of binary image, including neighborhood field contour extraction of contour extraction and eight neighborhood. And MATLAB processing pixels when the chain code method, also called the Freeman chain code. This algorithm for all of the profiles are made of chain code, chain code pixel paint can also be used.