Darktable 3:RGB or Lab? Which Modules? Help!

[guille2306 (Guillermo Rozas)]

@anon41087856

Except the sensor sits behind a color filter array, which transmittance links a spectrum of wavelengths to scalar intensities through an integral law. And several scalars, linked to several filters with shifted peak-transmittance, define a vector which represents a wavelength spectrum distribution, in a discrete way. Intensities are individual components of that vector, but it is indeed the shape of the spectrum, as a whole, that we want to represent and preserve along the pipe, which is kind of “preserving the energy” because it’s more than just the number of photons.

Great, understood. Still not fully convinced about the use of the word “energy” on the article, but I see where are you coming from. Thanks for the explanation (and, again, for the article!)