HOG feature extraction Descr iption This program is used to extract HOG(Histograms of oriented gradients) features from images. The integral histogram is used for fast histogram extraction. Both APIs and binary utility are provided. It is written in

hog特征提取，空间描述 anna_PHOG Computes Pyramid Histogram of Oriented Gradient over a ROI. % % [BH, BV] = anna_PHOG(I,BIN,ANGLE,L,ROI) computes phog descr iptor over a ROI. % % Given and image I, phog computes the Pyramid Histogram of Oriented Gradients % o

% HOG特征提取------------ % 第1步：计算水平,竖直方向, 像素梯度矩阵：Ix、Ty % 第2步：计算image对应：angle,magnitude矩阵 % 第3步：遍历, 第1层遍历block, 第2层遍历cell, 第3层遍历pixel % 计算每个pixel直方图，直方图合并 % 第4步：L2-Norm归一化, 0.2截断, 再L2-Norm归一化 % LBP特征提取----------- % 第1步：灰度图转化 % 第2步：第1层-遍历