first directional derivative
...:边缘检测,一阶方向导数,极值,傅里叶变换 [gap=1007]Key words:edge (boundary) detection, first directional derivative, extremum, Fourier transform ...
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first directional derivative
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参考来源 - 一阶方向导数极值法??一种检测边缘的新方法 in C
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