Finding a subimage inside a Numpy image

Question

I have two Numpy arrays (3-dimensional uint8) converted from PIL images.

I want to find if the first image contains the second image, and if so, find out the coordin

Answer 1

import cv2
import numpy as np

img = cv2.imread("brows.PNG")              #main image
gray_img = cv2.cvtColor(img,cv2.COLOR_BGR2GRAY)

template = cv2.imread("websearch.PNG", cv2.IMREAD_GRAYSCALE)      #subimage
w,h = template.shape[::-1]

result = cv2.matchTemplate(gray_img,template, cv2.TM_CCOEFF_NORMED)
loc = np.where(result >= 0.9)

for pt in zip(*loc[::-1]):
    cv2.rectangle(img, pt,(pt[0] + w,pt[1] +h), (0,255,0),3)

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