One delicate point, in my humble opinion, is to finally find a "color code", a manner to obtain an image wherein false colors are well selected, in order to avoid a final unclear or unreadable image, a bit too "psychidelic".... Too much informations killing the information i a sense.
Are you just trying to find a combination of channels that produces eye-analyzable images when just mixed together, or do you try to get a pleasing results for already analyzed data ?
Usually you don't just mix multi/hyper-spectral data and just hope to see something, you first segment the data either from prior knowledge of the physical properties of what you're looking, or through automatic segmentation to group spectral features together.
Hello,
My objective is very humble and also in accordance, like Ultrapurple, with a context of Hobbyist having (very, in my case) limited ressources.
I have passion for night vision technology and try also to collect materials (optics, image intensifier tubes, low light sensitive camera,...) and data, literature on this subject.
And i was since years fascinated by the fusion technology or COTI principle which was primary used by militaries and more recently in thermal monitoring for building or machines, PCB..... (cf Fluke products, SEEK,....)
I try to implement and to show to myself that such principle and technology, in 2021, can be reached by a hobbyist. As in may other domains (radio Ham, astronomy, general electronics and informatics...) we have now, in 2021, access to a plethore of materials which would have been under the monopole, 30 years ago, of gov agencies/institutioms, univ. lab, R&D department in some companies.... The rate of technology transfer from this confidential or restricted world to our hobbyist, civilian world, this last decade (at least) is amazing, thanks to the open source philosophy, fablab, fundamental data available in the net, archives....
And night vision multi-spectral system belongs to this kind of fascinating playground for me...
https://www.google.com/search?q=night+vision+fusion+image&tbm=isch&ved=2ahUKEwjJkoPinanxAhXhyLsIHdvmAVsQ2-cCegQIABAA&oq=night+vision+fusion+image&gs_lcp=CgNpbWcQAzoGCAAQBxAeOgQIABATOggIABAHEB4QEzoICAAQBRAeEBNQ26cBWNq3AWDUvgFoAHAAeACAATyIAYMEkgECMTCYAQCgAQGqAQtnd3Mtd2l6LWltZ8ABAQ&sclient=img&ei=3snQYMmrBOGR7_UP282H2AU&bih=722&biw=1536&rlz=1C1GCEB_en__891__891Other example based on digital low light camera working in Vis/NIr (Sionyx) combined to a thermal system...
etc....
Here is my first modest attempt in this direction...
https://www.eevblog.com/forum/thermal-imaging/attempt-for-a-multi-apectral-night-vision-system/Nothing new under the Sun, just the desire to understand a certain type of technology and to be able to reproduce, even crudely, such one....
and combining Vis/IR and LWIr domain for compensation intrinseque deficiencies from systems working in either one or another spectral domain is very interesting...
For the interpretation, or readability of the image obtained in real time ("video" system), for the time being i am focused on the idea to use one color with associated gradient for one channel (LWIr) and one other color with gradient for the other channel of interest (Vis/Nir). No more in term of colors variation...
I would consider even to keep a simple B&W gradient for one channel and only one color with gradient, and a relative transparency or opacity for one of the two channels for the final video image i would like to see.
Juste some thoughts....
Regards.
Stéphane