To solve this problem, using double threshold value takes the place of character threshold value in the former algorithm.
针对这一问题，在上述算法中用双阈值法代替固定阈值，在文字图像轮廓提取中取得了较好的效果。
To solve this problem, using double threshold value takes the place of character threshold value in the former algorithm.
针对这一问题，在上述算法中用双阈值法代替固定阈值，在文字图像轮廓提取中取得了较好的效果。
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