nico-curti / openslide Goto Github PK

Hey there! Recently found your openslide modification to use in Python, and I'm stoked there's something other than python bioformats. But I noticed that for reading regions (I need to do a sliding window so I can't avoid it), it's significantly slower than python bioformats, which surprised me.

Do you have any tips as to how make large region reading using your python library faster?.. Or what may be causing it to be slow? I simply opened the file as the brief documentation describes in your repo using the python context manager and attempted to load several successive regions within that context, all of them about 4000x4000, though with significantly less speed than bioformats.

Hi Nico,

First of all, thank you for your great effort in developing this fork.

I was wondering when we read vsi files, there're sometimes multiple images within a vsi file (label, overview and tissue section in high power).

Does this library provide a interface which allows us to specify which sub-image we want to read? Maybe there is one but I missed it?

Many thanks,
Ruoyu