Could anyone give us a guide about how to use openslide to view WSI

[jcupitt at gmail.com]

libvips can read images efficiently via the openslide library:

https://jcupitt.github.io/libvips/

The libvips "openslideload" operator was actually written by the
openslide developers.

You can load openslide images in nip2, the libvips GUI. nip2 is a
programmable GUI, so you can add features like transformation between
slide XY and pixel XY, if you want. It's open source and runs on
Linux, macOS and WIndows.

https://github.com/jcupitt/nip2

"vipsdisp" is a small image viewer that uses libvips to display images:

https://github.com/jcupitt/vipsdisp

So again it'll display openslide images. It has the nice feature that
screen painting is fully threaded and asynchronous.

John