Vipsdisp can display huge (many, many gigabyte) images quickly and without using much memory. As well as the usual PNG, JPG, TIF, PDF, SVG, WEBP, JP2, JXL, QOI and GIF, it supports many scientific and technical image formats, including SVS, MRXS, OpenEXR, FITS, Matlab, NIfTI, Analyze, and PFM. It supports and translates HDR metadata between JPG, PNG, AVIF and JXL, though there's no HDR display yet. Vipsdisp supports pixel types from 1 bit mono to 128-bit double precision complex, you can convert image formats, it support copy-paste and drag-drop, and it has a range of useful visualisation tools and display modes. vipsdisp includes a very simple "paintbox" you can use to annotate images. It can paint on images in all these numeric formats.
This community-provided package is not verified by, affiliated with, or supported by jcupitt.
This release is based on the latest nip4 code for lots of useful features, speedups and bugfixes. The big one is the new paintbox (see View > Paintbox), a simple tool for annotating images, but there's also support for QOI, PNGA, and HDR metadata.