At last, the edges of ROIs are detected by using morphological grads.

最后利用形态梯度的算法探测出感兴趣区域的边缘。

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Various algorithms of mathematical morphology are researched, they include hit or miss Transformation, edge detection and morphological grads, etc.

研究了多种目标提取的数学形态学算法，包括击中与击不中变换、边缘检测与形态学梯度等。

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