I have lots of images saved with no file extension.

I am trying to convert those images and do some work with PIL:

for img_path in list_imgs:
    with Image.open(img_path) as img:
        # more code

For some files this works ok but for others it shows PIL.UnidentifiedImageError. I tried to handle the exception by opening the file with OpenCV:

img = cv2.imread(img_path)

But I get the following error:

[ WARN:0@2.312] global D:\a\opencv-python\opencv-python\opencv\modules\imgcodecs\src\grfmt_tiff.cpp (462) cv::TiffDecoder::readData OpenCV TIFF: TIFFRGBAImageOK: Sorry, requested compression method is not configured

If I manually changed the file extension to .jpg for the specific file that files, I can open it using Windows Photos or any other app, even Microsoft Paint, so I know that the file is not damaged. However, both OpenCV and PIL have problems reading said file.

How can I open the image? Are there any other parameters that can be configured? Or can it be read directly into a NumPy array and then handled to PIL?