Answers for "read an image in opencv"

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()

how to img in opencv

import cv2
#Best Usage
path = r'image location'
img = cv2.imread(path)
#if you use resizde img
resized_img = cv2.resize(img, (640, 680)) #example 640, 680
cv2.imshow('resized_img', resized_img)
cv2.imshow('img', img)
cv2.waitKey(0)
cv2.destroyAllWindows()