OpenCV Python not opening images with imread()

Question

I'm not entirely sure why this is happening but I am in the process of making a program and I am having tons of issues trying to get opencv to open images using imread. I keep getting errors saying that the image is 0px wide by 0px high. This isn't making much sense to me so I searched around on here and I'm not getting any answers from SO either.

I have taken about 20 pictures and they are all using the same device. Probably 8 of them actually open and work correctly, the rest don't. They aren't corrupted either because they open in other programs. I have triple checked the paths and they are using full paths.

Is anyone else having issues like this? All of my files are .jpgs and I am not seeing any problems on my end. Is this a bug or am I doing something wrong?

Here is a snippet of the code that I am using that is reproducing the error on my end.

imgloc = "F:\Kyle\Desktop\Coinjar\Test images\ten.png"
img = cv2.imread(imgloc)
cv2.imshow('img',img)

When I change the file I just adjust the name of the file itself the entire path doesn't change it just refuses to accept some of my images which are essentially the same ones.

I am getting this error from a later part of the code where I try to use img.shape

Traceback (most recent call last):
  File "F:\Kyle\Desktop\Coinjar\CoinJar Test2.py", line 14, in <module>
    height, width, depth = img.shape
AttributeError: 'NoneType' object has no attribute 'shape'

and I am getting this error when I try to show a window from the code snippet above.

Traceback (most recent call last):
  File "F:\Kyle\Desktop\Coinjar\CoinJar Test2.py", line 11, in <module>
    cv2.imshow('img',img)
error: ..\..\..\..\opencv\modules\highgui\src\window.cpp:261: error: (-215) size.width>0 && size.height>0 in function cv::imshow

Answer 1

Faced the same problem on Windows: cv.imread returned None when reading jpg files from a subfolder. The same code and folder structure worked on Linux.

Found out that cv.imread processes the same jpg files, if they are in the same folder as the python file.

My workaround:

• copy the image file to the python file folder
• use this file in cv.imread
• remove redundant image file

import os
import shutil
import cv2 as cv

image_dir = os.path.join('path', 'to', 'image')
image_filename = 'image.jpg'
full_image_path = os.path.join(image_dir, image_filename)

image = cv.imread(full_image_path)
if image is None:
    shutil.copy(full_image_path, image_filename)
    image = cv.imread(image_filename)
    os.remove(image_filename)
...