中文说明：用matlab实现提取图像的HOG特征，运行test.m文件可直接得到特征集。HOG特征算法提取的是一种边缘特征，对于行人目标的检测与识别有极好的效果。
English Description：
Using MATLAB to extract hog feature of image, running test. M file can get feature set directly. Hog feature extraction algorithm is a kind of edge feature, which has excellent effect for pedestrian target detection and recognition.