在opencv下实现的prewitt边缘检测

经典HOG算法，基于梯度的直方图提取算法，用于人体检测十分有效！,HOG classic algorithms, gradient-based histogram extraction algorithms, used in human testing is very effective!

OpencV实现边沿检测，简单易懂，但是难免存在不当之处，请各位高手指教-OpencV to achieve edge detection, simple and easy to understand, but inevitably there is any irregularities, please master Zhijiao