2021.03.01 16:29 "[Tiff] TIFF and multispectral images of historical documents?", by Andreas Romeyke

2021.03.01 17:11 "Re: [Tiff] TIFF and multispectral images of historical documents?", by John

My question would be, can and is TIFF also used for multispectral images, and how exactly are they mapped in TIFF according to specifications (which tags, and so on)?

Hello Andreas,

I've seen this done in two ways:

  1. When I did spectral imaging of cultural objects back in the 90s I used to save them as RGB images, with the three bands most like RGB first, and all the other bands as unassociated alpha. This has the advantage that the images look approximately right in a regular image viewer, though of course few programs will be able to make sense of them without some modification.
  2. OME-TIFF puts each spectral band in a separate page. This is probably a more modern way to do it, and there's a fair amount of software that works like this you can leverage. https://docs.openmicroscopy.org/ome-model/5.6.3/ome-tiff

As you say, the GIS people have done a lot of this, but I don't know the details.