cv2.imread: checking if image is being read

Question

I\'m writing an OpenCV program in python, and at some point I have something like

import cv2
import numpy as np
... 
img = cv2.imread(\"myImage.jpg\")

# do         


        

Answer 1

If you want to write the contents as soon as the image file is being generated then you can use os.path.isfile() which return a bool value depending upon the presence of a file in the given directory.

import cv2 
import os.path

while not os.path.isfile("myImage.jpg"):
    #ignore if no such file is present.
    pass

img = cv2.imread("myImage.jpg", 0)

cv2.imwrite("result.jpg", img)

You can also refer to docs for detailed implementation of each method and basic image operations.