Why not just LRG?
Hi,
I was wondering, if luminance can be calculated from RGB, then why capture LRGB? I understand that it's desirable to capture the luminance, because of the high transmission of this filter, but why not just capture LRG, and calculate B from that?
It seems to me like if L = 0.33 R + 0.33 G + 0.33 B (or whatever appropiate coefficients)
Then B = (L - 0.33 R - 0.33 G) / 0.33
Any reason why it's not done like that?
Regards
|