Register | Login
BootSkins XP
Cursor FX
Dream
Icon Packager
LogonStudio XP
LogonStudio
Object Dock
Sound Schemes
Suites
WallPapers
WindowBlinds
All

Search
Forum Home | Login
We have re-enabled logins for the forums, please be aware that you may need to reset your password or register for an account again while we continue to restore full functionality.
Chris
Chris
Join Date 03/2001
0

Really neat illusion

September 27, 2002 5:24:36 PM from WinCustomize ForumsWinCustomize Forums
http://www-bcs.mit.edu/people/adelson/checkershadow_illusion.html

The squares denoted by A and B are actually the same shade of grey. Really cool!

Here are some animated examples
http://www-bcs.mit.edu/gaz/main-frameset.html

And here's the indepth analysis (warning: eye-glazing technical stuff ahead...)
http://www-bcs.mit.edu/people/adelson/publications/gazzan.dir/gazzan.htm

Locked Post
Search this post
Advanced Search
Subscription Options
Reason for Karma (Optional)
Successfully updated karma reason!
Chris
DavidK
Join Date 03/2001
0
Reply #1 September 27, 2002 6:12:43 PM
from WinCustomize ForumsWinCustomize Forums
That's amazing... the checkerboard is one of the best examples of that illusion I've ever seen.
Reason for Karma (Optional)
Successfully updated karma reason!
Chris
MarkMcQ
Join Date 03/2001
+18
Reply #2 September 27, 2002 6:52:35 PM
from WinCustomize ForumsWinCustomize Forums
I was totally sceptical about it, so I broke out Zoomer and checked the colours, and they are identical.
That's a fantastic page.
Reason for Karma (Optional)
Successfully updated karma reason!
Chris
Hell Dragon
Join Date 03/2001
0
Reply #3 September 27, 2002 8:08:31 PM
from WinCustomize ForumsWinCustomize Forums
I'll never trust my eyes again
Reason for Karma (Optional)
Successfully updated karma reason!

Sign Up or Login and this ad disappears!
There are many great features available to you once you register. Sign Up for a free account and browse the forums without ads.

Chris
Jafo
Join Date 03/2001
+1813 sdemployee
Reply #4 September 27, 2002 9:23:56 PM
from WinCustomize ForumsWinCustomize Forums
Yes, they are identical...and a very clear example of the illusion...
Reason for Karma (Optional)
Successfully updated karma reason!
Chris
Koasati
Join Date 07/2001
+21
Reply #5 September 27, 2002 10:13:54 PM
from WinCustomize ForumsWinCustomize Forums
Thanx Chris. The animations are quite 'eye opening' .....
Reason for Karma (Optional)
Successfully updated karma reason!
Chris
AlienTerror
Join Date 07/2002
0
Reply #6 September 28, 2002 2:08:42 PM
from WinCustomize ForumsWinCustomize Forums
did't understand a **** of the text
Reason for Karma (Optional)
Successfully updated karma reason!
Chris
paxx
Join Date 03/2001
0
Reply #7 September 28, 2002 3:12:22 PM
from WinCustomize ForumsWinCustomize Forums
Wow, like Hippy, I couldn't believe they were the same. I opened the image in Photoshop and masked everything but the two square. Yep, the same.
Reason for Karma (Optional)
Successfully updated karma reason!
Chris
Bangkokboy
Join Date 05/2002
0
Reply #8 September 28, 2002 7:32:11 PM
from WinCustomize ForumsWinCustomize Forums
I would have bet $100.00 that they were different, but my color picker doesn't lie. In a world where it's hard to find anything to trust, I now find that I can't even trust my eyeballs! Thank you Chris - er, I think.
Reason for Karma (Optional)
Successfully updated karma reason!
Chris
Bangkokboy
Join Date 05/2002
0
Reply #9 September 28, 2002 7:34:30 PM
from WinCustomize ForumsWinCustomize Forums
Does this have anything to do with the well known morning after optical disillusion phenomenon??
Reason for Karma (Optional)
Successfully updated karma reason!
Chris
werewolf
Join Date 04/2001
+28
Reply #10 September 29, 2002 11:41:45 AM
from WinCustomize ForumsWinCustomize Forums
What an piece of work is man... I had to use colorpad to check it, even after reading that everyone else had checked it. I was sure you were all wrong The demo's were great.

Powered by SkinBrowser!
Reason for Karma (Optional)
Successfully updated karma reason!
Chris
Aqua.
Join Date 10/2001
0
Reply #11 September 29, 2002 12:30:20 PM
from WinCustomize ForumsWinCustomize Forums
!!!
Reason for Karma (Optional)
Successfully updated karma reason!
Chris
Bangkokboy
Join Date 05/2002
0
Reply #12 September 30, 2002 12:18:06 PM
from WinCustomize ForumsWinCustomize Forums
This one won me some money, but I had to take along screenshots of the squares being checked with a color picker. People would not believe it without hard evidence. Then again, neither did I.
Reason for Karma (Optional)
Successfully updated karma reason!
Chris
craeonics
Join Date 03/2001
0
Reply #13 September 30, 2002 2:47:16 PM
from WinCustomize ForumsWinCustomize Forums
Context is everything. Though this was a bit extreme. The one in the shade seems lighter because of its darker surroundings and the other way around. Which is because we view things based on contrast, not on absolutes.
Reason for Karma (Optional)
Successfully updated karma reason!
Chris
Bangkokboy
Join Date 05/2002
0
Reply #14 September 30, 2002 5:07:24 PM
from WinCustomize ForumsWinCustomize Forums
The moral of this story is to surround yourself with yutzes if you're hell bent on looking good. And keep Superman 20 feet away at all times.
Reason for Karma (Optional)
Successfully updated karma reason!
Chris
Lecrayon
Join Date 02/2002
0
Reply #15 October 1, 2002 8:46:12 AM
from WinCustomize ForumsWinCustomize Forums
Crae, absolutely right! I love the illusion, but if you look closely you will notice the uphilly slope at the left back side. This is due to the wrong tonation of the grey and why a=b If you have the tonation right you will create depth and lose the illusion...

Powered by SkinBrowser!
Reason for Karma (Optional)
Successfully updated karma reason!
View all recent posts
Mark all posts as read Delete cookies created by the forum Return to Top
Stardock Forums v        Server Load Time:   Page Render Time:


Home | About | Privacy | Upload Guidelines | Terms of Service | Help
WinCustomize © 2025 Stardock. All Rights Reserved.