透過Opencv, Python比對Ａ影像是否有出現在B影像之中

影像比對

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

img = cv2.imread('/Users/yuhsuan/Desktop/matchTemplate_1.jpg',0)
img2 = img.copy()
template = cv2.imread('/Users/yuhsuan/Desktop/matchTemplate_2.jpg',0)
w, h = template.shape[::-1]

# 共有六種比對的演算法，已經先將他設定成只有一種
# All the 6 methods for comparison in a list
# methods = ['cv2.TM_CCOEFF', 'cv2.TM_CCOEFF_NORMED', 'cv2.TM_CCORR',
#             'cv2.TM_CCORR_NORMED', 'cv2.TM_SQDIFF', 'cv2.TM_SQDIFF_NORMED']
methods = ['cv2.TM_CCOEFF']
for meth in methods:
    img = img2.copy()
    method = eval(meth)

    # Apply template Matching
    res = cv2.matchTemplate(img,template,method)
    min_val, max_val, min_loc, max_loc = cv2.minMaxLoc(res)
    print(min_val, max_val, min_loc, max_loc)
    # If the method is TM_SQDIFF or TM_SQDIFF_NORMED, take minimum
    if method in [cv2.TM_SQDIFF, cv2.TM_SQDIFF_NORMED]:
        top_left = min_loc
    else:
        top_left = max_loc
    bottom_right = (top_left[0] + w, top_left[1] + h)

    cv2.rectangle(img,top_left, bottom_right, 0, 2)

    plt.subplot(121),plt.imshow(res,cmap = 'gray')
    plt.title('Matching Result'), plt.xticks([]), plt.yticks([])
    plt.subplot(122),plt.imshow(img,cmap = 'gray')
    plt.title('Detected Point'), plt.xticks([]), plt.yticks([])
    plt.suptitle(meth)

    plt.show()