ZEFRANK.COM - message board  

Go Back   ZEFRANK.COM - message board > FAST CHAT
FAQ Members List Calendar Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Rating: Thread Rating: 3 votes, 5.00 average. Display Modes
Old 03-20-2005, 05:07 AM   #1
Max Headroom
monkey
 
Max Headroom's Avatar
 
Join Date: Mar 2005
Location: 20 minutes in the future
Posts: 1,098
Arrow This is odd

Check out this photo in this this link, but more importanly read the caption below. Interesting questions and observations in the second paragraph.

Go here for a closeup view of this digital oddity.

Any one have any thoughts on this? I say it's the CIA
Max Headroom is offline   Reply With Quote
Old 03-20-2005, 05:16 AM   #2
Malmal11787
Coming in Last
 
Malmal11787's Avatar
 
Join Date: Oct 2004
Location: Sunny Arizona!
Posts: 311
dunno what to think. my head hurts from looking at it for so long. it draws me in!
Malmal11787 is offline   Reply With Quote
Old 03-20-2005, 06:26 AM   #3
shmitty
monkey
 
shmitty's Avatar
 
Join Date: Apr 2004
Posts: 248
I did the test my self because I'm skeptical. I created a large black background and created large white crossed bars on top of the pattern. Right away I saw the little circles (more of squares because of the size I made it). I used the eyedrop tool to select the section that looks darker and it was the same as the white around it. I don't think the algorithm "falls" for the optical illusion. I don't see how it could anyway because it looks at small sections at a time and compresses it that way. In order to fall for an illusion like this you have to see a significant amount of the picture at the same time. Correct me if I'm wrong please.
__________________
I may not have gone where I intended to go, but I think I have ended up where I needed to be. -Douglas Adams

In the beginning the Universe was created. This has made a lot of people very angry and been widely regarded as a bad move. -Douglas Adams
shmitty is offline   Reply With Quote
Old 03-20-2005, 09:35 AM   #4
melissa
monkey
 
melissa's Avatar
 
Join Date: Sep 2002
Location: on the go
Posts: 3,657
It's weird, but I don't think it's the CIA.
__________________
"Sometimes I doubt your commitment to Sparkle Motion."
melissa is offline   Reply With Quote
Old 03-20-2005, 10:38 AM   #5
Max Headroom
monkey
 
Max Headroom's Avatar
 
Join Date: Mar 2005
Location: 20 minutes in the future
Posts: 1,098
Quote:
Originally Posted by melissa
It's weird, but I don't think it's the CIA.
That's EXACTLY how the CIA does it. That or the three men in black suits who run the world.

They run everything I tell ya, EVERYTHING!!!!
Max Headroom is offline   Reply With Quote
Old 03-20-2005, 10:46 AM   #6
Frieda
in limbo
 
Frieda's Avatar
 
Join Date: Sep 2002
Location: The Netherlands
Posts: 19,504
shhhh! dont let em know you know!
__________________
zoek waar je wil, maar het zit in jezelf

oh yeah
Frieda is offline   Reply With Quote
Old 03-20-2005, 08:03 PM   #7
Simage
monkey
 
Join Date: Aug 2004
Location: The Twilight Zone
Posts: 289
just posted this on flickr too, but it is an artifact of the jpeg compression scheme. I'll see how much of this I remember form class now.

this can be reduced to a black and white image for simplicities sake, then every pixel is a value representing the intensity of a pixel. now if you take a loook at just one row of pixels and look at it as a graph on intensity with respect to time(actually column in this case) we can see that its actually a fairly simple step waveform, now any waveform can be created by the addition and subtraction of other smaller waveforms(wavelets I think they call them) , based on that, if we had an infinite number of cosine waves, we could perfectly represent the original wave we had, unfortunately, storing that much information is .... impractical (ie. you'd need an infinately large hard drive to store any image) so some smart people got together (the jpeg group- Joint Photographic Experts Group) and said "hey, the human eye isn't perfect, so if we can retain enough of the signal to fool the human eye thats good enough" and thats what they went on to do, so because of that we don't QUITE match the original waveform and we get som artifacts, in a black and white image like this one you can see them, if you zoom in close enough of color images on a white background you can sometimes see it around the edges.


dunno how much sense any of that made, and I'm reaching back into the dim recesses of me memory of my image processing class, so there may be more than one error in there.
Simage is offline   Reply With Quote
Old 03-20-2005, 08:22 PM   #8
zenbabe
Lollypop!
 
zenbabe's Avatar
 
Join Date: Sep 2002
Location: we are all made of stars
Posts: 11,690
^^^^ ditto!
__________________
Be yourself, because the people that mind don't matter, and the people that matter don't mind.

-Dr. Seuss
zenbabe is offline   Reply With Quote
Reply


Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is On
Forum Jump


All times are GMT -3. The time now is 05:37 AM.


Powered by vBulletin® Version 3.6.5
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.