中文说明：转，matlab(边界提取，链码生成，差分链码生成及频率向量生成程序)具有旋转不变性了的链码
English Description：
Matlab (boundary extraction, chain code generation, differential chain code generation and frequency vector generation program) has rotation invariant chain code
Boundary extraction, chain code generation, differential chain code generation and frequency vector
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中文说明：转，matlab(边界提取，链码生成，差分链码生成及频率向量生成程序)具有旋转不变性了的链码
English Description：
Matlab (boundary extraction, chain code generation, differential chain code generation and frequency vector generation program) has rotation invariant chain code