Stephan Bourgeois wrote:
As a pure thought-experiment, it would be interesting to design a scanner with the same illumination as described in the paper about the colourmouse. The scanner would either do 8 passes (!) or cycle fast enough between 8 series of LEDs.
Conceivably, but I would guess that the LED arrays are rather special, and getting them in other colors would be very expensive compared to the mass produced ones used in scanners.
As a colorimeter, a 3 LED scanner is likely to be far worse than a white light based/filter/CCD type scanner, since it's narrow band rather than the broad band responses that the CIE observer requires.