24_template_matching_multiple_objects.py

import cv2
import numpy as np
from matplotlib import pyplot as plt

img_rgb = cv2.imread('mario.png')
img_gray = cv2.cvtColor(img_rgb, cv2.COLOR_RGB2GRAY)

template = cv2.imread('mario_coin.png', 0)
w, h = template.shape[::-1]

res = cv2.matchTemplate(img_gray, template, cv2.TM_CCOEFF_NORMED)
threshold = 0.8
loc = np.where(res >= threshold)

for pt in zip(*loc[::-1]):
    cv2.rectangle(img_rgb, pt, (pt[0] + w,  pt[1] + h), (0, 0, 255), 2)

cv2.imwrite('mario_identify_coins.png', img_rgb)