双峰法的原理及其简单：它认为图像由前景和背景组成，在灰度直方图上，前后二景都形成高峰，在双峰之间的最低谷处就是图像的阈值所在。-Bimodal law theory and simple: it considers the prospects and the background image from the composition, in the histogram, the before and after the Second King have formed a peak in the lowest valley between two peaks is that the images where the threshold.