import cv2 
import numpy as np

## kép megnyitása
INPUT_IMAGE = "../gyalogos.jpg"
OUTPUT_IMAGE = "pedestrian_HOG.png"
img = cv2.imread(INPUT_IMAGE)
gray_img = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)

## HOG leíró létrehozása
hog = cv2.HOGDescriptor()
hog.setSVMDetector(cv2.HOGDescriptor_getDefaultPeopleDetector())

## detekció
(rects, weights) = hog.detectMultiScale(gray_img, winStride=(4,4), padding=(8,8))

for (x,y,w,h) in rects: 
	cv2.rectangle(img, (x,y), (x+w, y+h), (0,255,255), 10)

cv2.imwrite(OUTPUT_IMAGE, img)