I’ve posted an interesting animation below, one that loops
indefinitely between two simmilar pictures. Before you start,
I’d like you to wait few seconds before the animation loops to
it’s start. You’ll know it when you see left image blurred, and
the right one in high contrast. Ok, once you’re set gaze for a
few seconds at the fixation cross in the center of the two
neighboring images. After 10 seconds two new halves will appear,
and I want you to judge the contrast of these halves. What did
just happen? At first, the difference between two halves was
more than obvious – one was blurry, and the other one sharp.
After the change, on the left part you initially perceived high
contrast, and on the right noticeably less contrast. The right
one became somehow darker, am I right? This effect persists only
for a few seconds. After a while (moving your eyes around the
picture should help) it becomes apparent that the 2 new halves
are both identical. All of this has something to do with
Contrast adaptation and Contra