opencv image read code example

Example 1: show image opencv python

import cv2
img = cv2.imread('/path_to_image/opencv-logo.png')
cv2.imshow('image',img)
cv2.waitKey(0)
cv2.destroyAllWindows()

# to use it in a loop
k = cv2.waitKey(0)
if k == 27:         # wait for ESC key to exit
    cv2.destroyAllWindows()
elif k == ord('s'): # wait for 's' key to save and exit
    cv2.imwrite('messigray.png',img)
    cv2.destroyAllWindows()

Example 2: cv show image python

cv2.imshow('image',img)
cv2.waitKey(0)

Example 3: open opencv image file

cv2.imshow('image',img)
cv2.waitKey(0)
cv2.destroyAllWindows()

Example 4: python opencv load image

img = cv2.imread('filename.jpg',1)

Example 5: cv2.namedwindow

cv2.namedWindow("Frame_Name", cv2.WINDOW_NORMAL)