基于MATLAB语言，对于图像的链码的差分，以及归一化，以及回复图像的链码-Based on the MATLAB language, for the image of the differential chain code, as well as normalized and responding to the image of the chain code

matlab中对图像的边界进行提取，链码生成差分链码生成及频率向量生成-matlab image boundary extraction, chain code to generate a differential chain code generation and frequency vector generation