Wayne,
So is there no need to make a distinction between the 2 terms, for our
purposes?
>From the 2 pixel example, would the ability of the user to manually adjust
one or both of those pixels necessarily lead to sufficient contrast?
Erich Manser
IBM
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You don't need eyesight to have vision.
From: Wayne Dick <wayneedick@gmail.com>
To: public-low-vision-a11y-tf <public-low-vision-a11y-tf@w3.org>
Date: 01/06/2016 08:09 PM
Subject: Sorted it out.
To compute contrast we use luminance (luminosity per pixel) when we discuss
the effects of brightness we are interested in the total amount of light
emitted by a region the luminosity. It only takes two pixels to create
high contrast, but to a person with night blindness may not see it because
the total amount of light (luminosity) may be to faint to see.
Wayne
