https://userpages.uni-koblenz.de/~agas/Documents/Trierscheid2008HIF.pdf I saw these article while researching and will leave it here in case someone in the future would ask the same thing. From what I understood from reading it, it uses NIR camera and says that it can detect human skin even if it is buried with dust or even if the person is already cold and dead since it does not depend on temperature. Sounds really expensive though.
https://userpages.uni-koblenz.de/~agas/Documents/Trierscheid2008HIF.pdf I saw these article while researching and will leave it here in case someone in the future would ask the same thing. From what I understood from reading it, it uses NIR camera and says that it can detect human skin even if it is buried with dust or even if the person is already cold and dead since it does not depend on temperature. Sounds really expensive though.
I kind of knew about it, but couldn't find it available for resale, except in bulk/outside "hobbyist" prices, which is why I mentioned "consumer market". However, if you CAN find it, and afford it, this may be your best bet... Again, depending on distance you plan to be.
