对图像首先进行了边缘提取和细化，然后对细化了的图像通过链码来输出，是一个对图像编程人员非常实用的工具哦-the first images of edge extraction and refining, and then refined through images of the chain code to output, the image is a programmer very useful tool oh

拐点的检测，对一个图像的拐点进行检测，使用的是freeman链码的方法，检测图像中拐点的方向，确定该方向是不是拐点。-Inflection point detection, an image of the inflection point for testing, use freeman chain code method, testing the image in the direction of the inflection point, we determine the direction