load_images        16 samples/cpp/train_HOG.cpp void load_images( const string & prefix, const string & filename, vector< Mat > & img_lst );
load_images       419 samples/cpp/train_HOG.cpp     load_images( argv[1], argv[2], pos_lst );
load_images       422 samples/cpp/train_HOG.cpp     load_images( argv[3], argv[4], full_neg_lst );