I’ve noticed that QuPath 0.2.3 doesn’t like image crops generated by NDP.toolkit v 18.104.22.168. When you open such a file, here’s how it looks:
I’m not sure if this is a problem with NDP.toolkit, QuPath or OpenSlide. OpenSlide v3.4.1 mentions NDP.toolkit by name in their Changelog: hamamatsu: Properly detect NDPI slides produced by NDP.toolkit. Maybe I should ask our Hamamatsu rep if there’s a newer version of NDP.toolkit I could try.