Swap opencv-python for opencv-python-headless

[fanquake]

With the release of opencv-python 3.3.0.10, new dependencies were added to support Qt. This has made it harder to use opencv-python in some server environments were certain libraries might not be available, and/or not possible to install. See opencv/opencv-python#44 for one such example.

In response opencv-python now provides headless packages.

We are using sentinelhub-py in a server environment where installing the GUI related dependancies might not be possible, so for now we've just had to pin our opencv-python package to version 3.3.0.9.

Would it be possible switch sentinelhub-py's requirement on opencv-python to opencv-python-headless? I've had a look through the code here, and done some testing locally that would seem to suggest the two could be swapped directly.

Interested in any thoughts on this. Thanks.

[AleksMat]

Hi fanquake,

thanks for raising this issue and pull request. At the moment we are also thinking about replacing opencv-py altogether (probably with pillow). There are also a few other issues that we have with OpenCV. For example the new version of OpenCV does not support reading of 15-bit JPEG2000 images (described in #33).

We have to run some tests and we will let you know as soon as possible.

[AleksMat]

Version 2.3.0 of sentinelhub has now been released. We swaped opencv-python dependency with Pillow.

I hope that fixes the problem. Let us know if you will be able to run it in server environment.

[fanquake]

@AleksMat We've started using 2.3.0 in production, and everything is working as expected.
Thanks for the quick turnaround 👍