A Bayer filter doesn't give you single wavelengths they have a broad, somewhat overlapping spectrum. An LED display on the other hand has three distinct narrow

A Bayer filter doesn't give you single wavelengths they have a broad, somewhat overlapping spectrum. An LED display on the other hand has three distinct narrow bands. I'm not sure how their inverse algorithm could work, but I have a feeling it should be possible to get more than three points of the spectrum by displaying multiple light patterns. Regarding full-spectrum ambient light: they can't use it at all because they have to subtract it from the images. You can only recover spectral information from the light you control. At least that's what I'm thinking right now.