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<p>我想比较两个图像以检查它们是否相等,但为此我需要比较两个图像的特定区域(ROI)。
我已经裁剪了我想比较的区域,但是现在我想知道如何进行该过程,因为我无法直接比较裁剪的图像。
例如,如何获得两个裁剪图像的平均像素值并进行比较?在</p>
<p>更新:我已经解决了这个问题。
当前代码:</p>
<pre><code>import cv2
import numpy as np
from skimage.measure import compare_ssim as ssim
def mse(imageA, imageB):
# the 'Mean Squared Error' between the two images is the sum of the squared difference between the two images;
err = np.sum((imageA.astype("float") - imageB.astype("float")) ** 2)
err /= float(imageA.shape[0] * imageA.shape[1])
polarity_ok = cv2.resize(cv2.imread("polarity_OK_edited.jpg"),None,fx=0.2, fy=0.2) #resize the image to be smaller
polarity_nok = cv2.resize(cv2.imread("Polarity_NOK1.JPG"), None,fx=0.2, fy=0.2) #resize the image to be smaller
polarity_ok_cropped = polarity_ok[350:408, 97:111]
polarity_nok_cropped = polarity_nok[350:408, 97:111]
polarity_ok_cropped1 = polarity_ok[359:409, 232:240]
polarity_nok_cropped1 = polarity_nok[359:409, 232:240]
polarity_ok_cropped2 = polarity_ok[118:153, 44:69]
polarity_nok_cropped2 = polarity_nok[118:153, 44:69]
polarity_ok_cropped3 = polarity_ok[94:142, 192:197]
polarity_nok_cropped3 = polarity_nok[94:142, 192:197]
m = mse(polarity_ok_cropped, polarity_nok_cropped)
s = ssim(polarity_ok_cropped, polarity_nok_cropped, multichannel=True)
diff = cv2.subtract(polarity_ok_cropped, polarity_nok_cropped)
result = not np.any(diff)
m1 = mse(polarity_ok_cropped1, polarity_nok_cropped1)
s1 = ssim(polarity_ok_cropped1, polarity_nok_cropped1, multichannel=True)
diff1 = cv2.subtract(polarity_ok_cropped1, polarity_nok_cropped1)
result1 = not np.any(diff1)
m2 = mse(polarity_ok_cropped2, polarity_nok_cropped2)
s2 = ssim(polarity_ok_cropped2, polarity_nok_cropped2, multichannel=True)
diff2 = cv2.subtract(polarity_ok_cropped2, polarity_nok_cropped2)
result2 = not np.any(diff2)
m3 = mse(polarity_ok_cropped2, polarity_nok_cropped2)
s3 = ssim(polarity_ok_cropped2, polarity_nok_cropped2, multichannel=True)
diff3 = cv2.subtract(polarity_ok_cropped3, polarity_nok_cropped3)
result3 = not np.any(diff3)
if (result and result1 and result2 and result3):
print ("The polarity is correct. Awesome :)")
else:
print ("Nice try, but the polarity is incorrect. Take another chance!")
</code></pre>