First, the connected region growing tree is established from a set of thresholded images with different thresholds.
首先利用一组多阈值分割结果建立连通域生长树。
2
An optimum threshold is selected by maximizing the correlation between the original halftone image and the thresholded bi-level image.
该算法以原始图像与分割后图像的相关系数最大为准则，选取最优阈值对磨粒图像进行二值化。
3
The edge maps are extracted first then it is thresholded and the authors take the area of the background as the illumination invariant measure to perform the detection of shots.