一幅图像包括目标物体、背景还有噪声，要想从多值的数字图像中直接提取出目标物体，最常用的方法就是设定一个阈值T，用T将图像的数据分成两部分：大于T的像素群和小于T的像素群。这是研究灰度变换的最特殊的方法，称为图像的二值化-An image including the target object, have the background noise, in order from the multi-valued digital image directly to extract the target objects, the most commonly used method is to set a threshold T, with T the image data divided into two parts: large pixel in the T group and T is less than the pixel group. This is study of gray-scale transformation of the most special method, known as image binarization