Rombout wrote:is see all those colors indeed, but i noticed that white is always yellow and it turns to deep purple over when black. Every color in between is a color in between off that. I will see if i can find something which gives me more info about these analysis.
Rombout, from Wikipedia:
The luminance indicates how much luminous power will be perceived by an eye looking at the surface from a particular angle of view. Luminance is thus an indicator of how bright the surface will appear.
In other words, the luminance is the perceived (coloured) light power. No light = black, 100% light across all frequencies = white...
Now,
illuminance is actually a measure of the intensity of the
incident light, aka the light hitting the surface. On white reflective surfaces the luminance will approximate the illuminance, but black surfaces will absorb all the incident light, giving very low luminance back...
That's why, as a practical analysis tool, illuminance is more interesting for me, but that's being discussed in a different thread..
