中文说明：根据Dalal提出的HOG特征算法编写，代码简单，注释清楚，根据所处理图像的名称路径修改后可生成36*105的特征向量。
English Description：
According to the hog feature algorithm proposed by DALAL, the code is simple and the annotation is clear. According to the name path of the processed image, the modified feature vector of 36 * 105 can be generated.