应用自适应理论和模糊理论，提出几种确定二值化阀值的具体方法。这些方法 然由简到繁，但是其灰度的局部适应性和方向的匹配性越来越强，因而得到的阀 越来越准确。-Adaptive theory and fuzzy theory, several binarization threshold to determine the specific method. However, these methods from the simple to the complex, but the intens