My gut feeling is that finding enough very specific wavelength shifting inks would be harder. Perhaps its a mix though to get good readings in the faar edges between the rgb wavelengths.
I hope there is a research paper on this i can read.
I expect rolling shutters to be a far larger issue. Haven't read the article a second time, but non-uniform and inconsistent lighting is a huge challenge for this kind of work.
I hope there is a research paper on this i can read.