灰度门限化许多情况，图象是由具有不同灰度级的两类区域组成。如文字与纸张、地物与云层（航空照片）。其特点:直方图具有两个峰，分别与两个灰度级范围相对应 。故可选择一个门限，将两个峰分开。-Gray threshold of many cases, the image is gray level of two different regional groupings. If words and paper, surface features and cloud cover (aerial photo

This paper proposes the use of a vector of color histogram peaks a n efficient and effective way for many image indexing problems. It shows that histogram peaks are more stable than general histogram bins when there are variation of scale and/o

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

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