Canny算法求图像边缘，C++语言实现。步骤分：求梯度、非极大值移植、自适应阈值、滞后阈值求边缘、边缘细化。算法核心由C语言实现，效果可以和OpenCV和Matlab相媲美。-Canny algorithm for image edge, the use of C++ language, the steps include: for gradient, maximum value suppression, adaptive threshold, hysteresis threshold. Th