通过基于梯度直方图来选取双阈值，最后进行基于双阈值的非极大值抑制，得到边缘检测的图像。
Based on the gradient histogram, the double thresholds can be found. At last, non-maximum suppression based on double thresholds is used to detect the edge.
通过基于梯度直方图来选取双阈值，最后进行基于双阈值的非极大值抑制，得到边缘检测的图像。
Based on the gradient histogram, the double thresholds can be found. At last, non-maximum suppression based on double thresholds is used to detect the edge.
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