HOG特征提取 matlab代码

%% This function extract hog features of all face images under the path 'path' with extension 'ext'. % Return: A 1-by-N cell with containing the features of face images where N % is the number of face images. function feat = extract_hog_feat(path,ext) tic fls = dir([path '/' '*.' ext]); feat = cell(1,length(fls)); if isempty(fls) warning('No image file was found.'); toc return; end % parameters. szPatch = 16; sift_fac = 0.5; szImage = size(imread([path '/' fls(1).name ])); for indImg = 1:length(fls) I = imread([path '/' fls(indImg).name ]); feat{indImg} = HOG(I,4*szPatch,sift_fac/4,szImage); end toc end