Archived posting to the Leica Users Group, 1999/09/24
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Mark Rabiner wrote: > > The issue in your first paragraph is I think one of discontinuous spectrum. > Scattered Holes where certain colors don't exist at all. > IN your second paragraph it's one of balance. All the colors are there but in > different amounts. Am I right? A warm verses a cold bias. > Mark Rabiner My point in the 2nd paragraph was that even with a continuous spectrum light source, it is still possible, in fact, likely, to have too little light recorded at one end or the other of the spectrum. Attempting to correct a non-linear bias with a large linear correction doesn't work. Zero x zero = zero. Low-level detail plus noise x large linear correction = large error = ugly. Pretty much the same situation you have in dealing with discrete light sources. - -Mike