Sending image to remote server causes PIL.UnidentifiedImageerror

[FabianaMoresi]

Hi, thanks for your repository!

I managed to install everything on an Amazon EC2 instance with absolutely no problem.
However, after adding the remote server URL in the QuPath extension, the server fails with the following stacktrace:

File "/home/ec2-user/anaconda3/envs/cellsparse-api/lib/python3.11/site-packages/cellsparse_api/main.py", line 30, in decode_image
    return np.array(Image.open(io.BytesIO(base64.b64decode(b64data))))
                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/ec2-user/anaconda3/envs/cellsparse-api/lib/python3.11/site-packages/PIL/Image.py", line 3298, in open
    raise UnidentifiedImageError(msg)
PIL.UnidentifiedImageError: cannot identify image file <_io.BytesIO object at 0x7f0f6a05d6c0>

I'm trying to figure out if this is a problem of the extension or of the API server. Can you help? Thanks!

[ksugar]

Thank you @FabianaMoresi, for reporting the issue!
It seems that the error happened when it tried to decode the image.
If you use an image with multi-channels, this error may happen.
I will work on solving it as soon as possible and will let you know once it's done.
For the moment, only grayscale images will work properly. If you want to test how it works, please try it with the grayscale images.