# authors: olangley, srowley2, wschor
# Requirements: numpy, cv2 (openCV)

import numpy as np
import cv2
import os
import sys
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if (len(sys.argv) != 3):
    print(f"Usage: {sys.argv[0]}, <image1-path> <image2-path>")
    exit(1)
​
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img1_path = sys.argv[1]
img2_path = sys.argv[2]
img1_path = os.path.abspath(img1_path)
img2_path = os.path.abspath(img2_path)
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img1 = cv2.imread(img1_path)
img2 = cv2.imread(img2_path)
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assert img1.shape == img2.shape
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cv2.imshow('image 1', img1)
cv2.imshow('image 2', img2)
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key = np.random.randint(255, size=img1.shape,dtype=np.uint8)
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cv2.imshow('KEY', key)
cv2.waitKey(0)
cv2.destroyAllWindows()
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# FIRST IMAGE
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encryptImg1 = cv2.bitwise_xor(img1, key)
cv2.imshow('image 1', img1)
cv2.imshow('Encrypt Image 1',encryptImg1)
cv2.waitKey(0)
​
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# SECOND IMAGE
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encryptImg2 = cv2.bitwise_xor(img2, key)
cv2.imshow('image 2', img2)
cv2.imshow('Encrypt Image 2',encryptImg2)
cv2.waitKey(0)
cv2.destroyAllWindows()
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# OVERLAY FLAW
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encryptBoth = cv2.bitwise_xor(encryptImg1, encryptImg2)
cv2.imshow('Encrypt Both',encryptBoth)
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key_xor = cv2.bitwise_xor(key, key)
cv2.imshow('key encrypt', key_xor)
cv2.waitKey(0)
cv2.destroyAllWindows()