Opencv read image as BGR, a

bgr2rgb.py

import cv2
import numpy as np
import matplotlib.pyplot as plt
# show diff
# Approach 0
img = cv2.imread('messi4.jpg')
b,g,r = cv2.split(img)
img2 = cv2.merge([r,g,b])
plt.subplot(121);plt.imshow(img) # expects distorted color
plt.subplot(122);plt.imshow(img2) # expect true color
plt.show()

cv2.imshow('bgr image',img) # expects true color
cv2.imshow('rgb image',img2) # expects distorted color
cv2.waitKey(0)
cv2.destroyAllWindows()

# Approach 1
img2 = img[:,:,::-1]
# Approach 2
img2 = img[..., ::-1]
# Approach 3
cv2.cvtColor(img, cv2.BGR2RGB)

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