But I don't agree that a monitor's white = a bright lamp (& it's fortunate for our eyes that it isn't).
In order to emulate a bright lamp, or generally the sun in videogames, you add a halo, that will make the white so saturated that it will bleed around it. And this is what will make a dark thin line disappear around a bright sun, that halo. To me a monitor's white = paper white. Ok, it's generally brighter (than paper under normal reading light), but it's still on that same max white that we read text, so it's far from a light bulb's light. Now the question is whether that same bleeding effect also applies to lower brightness, that I don't know. A CRT had that kind of bleeding, but for other reasons. But in any case, logical or not, the end user certainly doesn't want/expect to see thin black on white text vs chubby white on black text. You'd probably hate it in this very reply box. On Sat, Nov 9, 2013 at 1:39 AM, Søren Sandmann <sandm...@cs.au.dk> wrote: > Dave Arnold <darn...@adobe.com> writes: > > > > I agree in theory that gamma correction should make the weight of > > black text and white text appear the same. > > It's not clear to me that this is the case. Consider the following > experiment: > > Suppose you have a big, bright lamp and some ideal, black cardboard that > doesn't let any light through. > > In scenario 1 you cover the entire lamp with cardboard except it has an > an 'A' shaped hole cut in it. Since the cardboard is ideal, we get a > glowing A on a black background. > > In scenario 2, you hang an 'A' shaped mask in front of the lamp so that > you get a black A on a bright background. > > Will the two As appear to have the same weight? I'm guessing the glowing > one will appear bolder than the dark one. > > > Søren >
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