There's an infinite number of ways to digitize a painting. What if you invented, say, a new algorithm to calculate colors from bayer pattern? Or an entirely new

There's an infinite number of ways to digitize a painting. What if you invented, say, a new algorithm to calculate colors from bayer pattern? Or an entirely new sensor (as, e.g. Foveon, did)? Or, maybe, a new lighting scheme that produces more accurate colors? Should you be denied the copyright on your work because you "sought to reproduce the paintings as exactly as possible"? I don't think so. In this respect the court decision makes sense to me. On the other hand, I agree that preventing sharing of public domain works runs counter to the mission of public museum and, while legally entitled to, they probably shouldn't exercise their copyright in this way.