经典的OSTU的算法，实现对图像阈值的查找并对图像进行二值化分割显示-OSTU classic algorithms, to achieve the threshold on the image search and image segmentation show binarization

二值图像的轮廓检测，借用ostu自适应阈值分割，效果良好-Contour detection binary image, to borrow otsu adaptive threshold segmentation, good effect