最小偏态二值化法，用阈值T分割图像，分别求得背景和前景的三阶矩，使得偏态公式取最小值的T即为最佳阈值。-The smallest skewness binarization method, using image segmentation threshold T, respectively, to achieve the background and prospects of third-order moments, skewness formula made from the minimum value of T is the optimal threshold.