数字图像处理比较完整的程序，包括图像二值化、灰度线性化、阈值变换、边缘检测、轮廓跟踪、图像细化-More complete digital image processing procedures, including image binarization, gray linear, threshold transform, edge detection, contour tracing, image thinning, etc.

几个fork的demo程序，方便初学者学习。-Several fork of the demo program, easy for beginners to learn.

a demo program for arm9 develop board