Matching - Python(OpenCV)

https://docs.opencv.org/2.4/doc/tutorials/imgproc/histograms/template_matching/template_matching.html

1. method=CV_TM_CCOEFF_NORMED

b. method=CV_TM_CCORR

import cv2
import numpy as np

img = cv2.imread("messi5.jpg")
grey_img = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
template = cv2.imread("messi_face.jpg", 0)
w, h = template.shape[::-1]
#TM_CCORR_NORMED
res = cv2.matchTemplate(grey_img, template, cv2.TM_CCOEFF_NORMED)
print(res)
threshold = 0.9;
loc = np.where(res >= threshold)
print(loc)
for pt in zip(*loc[::-1]):
    cv2.rectangle(img, pt, (pt[0] + w, pt[1] + h), (0, 0, 255), 2)

cv2.imshow("img", img)
cv2.waitKey(0)
cv2.destroyAllWindows()