I was wondering this too, the author added this info via a reply in the comments (of his site/article , not HN)-

> Author here. The camera was a Seek RevealPro which has 320x240 resolution. The thermal data in the panoramas are stitched together from raw data exported by the camera and represented as color (hue+saturation, as per scale in upper right, represents temperature data).

The brightness channel is piecewise-linearly combined with a corresponding visual image taken with a regular SLR to provide a visual reference of what you're looking at.

I think the ThermApp cameras had the ability to combine a visual photo, but I haven't used mine for quite some time so I may be wrong.

OP here. Seek RevealPro. I added a top-level comment with some more details and links :)

Thanks OP. Really great work on those Iceland pics. It’s an original concept I haven’t seen before - adding thermal data to panoramas of landscapes with geothermal heat. So cool. I’m a bit jealous I didn’t think of it first.

Sounds like you have a science background and field, but I’d encourage you to think of these as art and chat to a few galleries about an exhibition. At the very least it would be fun, and pretty amazing to see big blowups of your own imagery. They may be able to do a virtual exhibition during Covid.

> chat to a few galleries about an exhibition

I would love to! I'm a physics/EE major by training and career-wise I'm focused on ML and robotics, but I love art and especially using art to visualize science in ways that are understandable to the general public. (I'm also doing an astrophotography project to show the visual sizes of various nebulae. Your usual NASA photos don't really provide any sense of scale, and many people have the misconception that you need insane magnification to see them, but there are actually a whole lot of objects that are visually much bigger than the moon, just too dim to see.)

Being an engineer by background my network is mostly engineers -- I don't really have any strong connections with galleries and media, but I'll be on the lookout for them! I welcome intros if anyone would be so kind. :) TIA!

Thank you for all of these, awesome work.

I wonder how much imaging technology has been held back by ITAR.

Looks really nice. I see one for sale in the US. $4k though.

You can buy a FLIR Boson at 640x512 for that price. The cost of thermal cameras is roughly linear with the number of pixels. I realise that's not cheap, but you can get double the resolution (e.g. 4x pixels) for the same money.