【笔记】HOG (Histogram of Oriented Gradients, 方向梯度直方图)的开源实现

• wiki上的介绍

• OpenCV的实现

cv::HOGDescriptor Struct Reference

• opencv cv::HOGDescriptor 的调用例子

    HOGDescriptor hog(win_size, Size(16, 16), Size(8, 8), Size(8, 8), 9, 1, -1,
                          HOGDescriptor::L2Hys, 0.2, gamma_corr, cv::HOGDescriptor::DEFAULT_NLEVELS);
    hog.setSVMDetector( HOGDescriptor::getDaimlerPeopleDetector() );
            hog.detectMultiScale(img, found, hit_threshold, win_stride,
                    Size(0, 0), scale, gr_threshold);

• opencl的实现