These three threshold selection method in practical applications have many shortcoming.
这三种阈值选取方法在实际应用中都有很多不足之处。
The concept of the two-dimensional bound histogram is proposed, and an automatic threshold selection method based on that histogram is presented.
提出了二维属性直方图的概念，进而提出了一种基于二维属性直方图的图像自动阈值化方法。
Curvature segmentation method is a multi-threshold selection method through searching valley based on histogram cumulative distribution function.
阈值的曲率分析即基于灰度直方图累计函数的峰项一峰谷检测法中曲率函数存在着选择最适参数的问题。
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