Images

Reading and Displaying Images

import numpy as np
import cv2

img = cv2.imread('messi5.jpg', 0)  # 0 = grayscale
cv2.imshow('image', img)
cv2.waitKey(0)
cv2.destroyAllWindows()

• cv2.imread(path, flag) — reads an image; flag 0 for grayscale, 1 for color (BGR)

• cv2.imshow(window_name, img) — displays image in a window

• The alpha channel is a fourth channel (RGBA) representing transparency per pixel