Re: [ft-devel] gamma correction and FreeType

[Dave Arnold]

One mechanism I can think of for this is "bloom" or "bleed", where a signal for 
one pixel affects neighboring pixels. This can apply both to the display and to the sensor (the 
eye).
Your experiment uses a "bright" lamp. Do you think ordinary viewing conditions would have 
enough brightness or contrast to cause such "bleed"?

-Dave

On 11/8/2013 4:39 PM, Søren Sandmann wrote:
> Dave Arnold <address@hidden> 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