比較temp和原圖片重疊的部分

result = cv.matchTemplate( image, templ, method[, result[, mask]] )

import cv2 as cv
import numpy as np
from matplotlib import pyplot as plt
img_rgb = cv.imread('mario.png')  # 讀取圖片，整張圖片
img_gray = cv.cvtColor(img_rgb, cv.COLOR_BGR2GRAY)  # 轉化為灰度圖
template = cv.imread('mario_coin.png',0)  # 讀取金錢的圖片，為灰度圖
w, h = template.shape[::-1]
res = cv.matchTemplate(img_gray,template,cv.TM_CCOEFF_NORMED)  # 匹配
threshold = 0.8
loc = np.where( res >= threshold)
for pt in zip(*loc[::-1]):
    cv.rectangle(img_rgb, pt, (pt[0] + w, pt[1] + h), (0,0,255), 2)
cv.imwrite('res.png',img_rgb)