open image python 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: read image in python

import numpy as np
import cv2
# Load an color image in grayscale
img = cv2.imread('Top-bike-wallpaper.jpg',0)

Example 3: crop image python

from PIL import Image # import pillow library (can install with "pip install pillow")
im = Image.open('card.png')
im = im.crop( (1, 0, 826, 1125) ) # previously, image was 826 pixels wide, cropping to 825 pixels wide
im.save('card.png') # saves the image
# im.show() # opens the image