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Re: [ft-devel] gamma correction and FreeType


From: Søren Sandmann
Subject: Re: [ft-devel] gamma correction and FreeType
Date: Sat, 09 Nov 2013 01:39:59 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/23.3 (gnu/linux)

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



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