在python中使用opencv比較兩個圖像時出現錯誤

Question

在Python 2.7中使用OpenCV比較兩個圖像時遇到問題

這是我的代碼：

import cv2
import numpy as np

img1 = cv2.imread("./spot/image1.jpg")
img2 = cv2.imread("./spot/image2.jpg")

diff = cv2.subtract(img1, img2)

result = not np.any(diff) 

if result is True:
    print "The images are the same"
else:
    cv2.imwrite("result.jpg", difference)
    print "the images are different"

我收到此錯誤：

Traceback (most recent call last):
  File "E:\PrgLang\Python\compareImage.py", line 7, in <module>
    diff = cv2.subtract(img1,img2)
error: OpenCV(3.4.1) C:\build\master_winpack-bindings-win64-vc14-static\opencv\modules\core\src\arithm.cpp:659: error: (-209) The operation is neither 'array op array' (where arrays have the same size and the same number of channels), nor 'array op scalar', nor 'scalar op array' in function cv::arithm_op

Answer 1

import cv2
import numpy as np

img1 = cv2.resize(cv2.imread("./spot/image1.jpg"), (224, 224)).astype(np.float32)
img2 = cv2.resize(cv2.imread("./spot/image2.jpg"), (224, 224)).astype(np.float32)

diff = cv2.subtract(img1, img2)

result = not np.any(diff) 

if result is True:
    print "The images are the same" 
else:
    cv2.imwrite("result.jpg", diff)
    print "the images are different" 

Answer 2

OpenCV減法函數要求兩個輸入數組（如果它們是兩個數組，而不是一個數組和一個標量）必須具有相同的通道大小和數量。

檢查兩者均為RGB還是GREY，然后將其中一個調整為另一尺寸。 僅需要調整大小。