Pretty cool optical illusion

Rantorama · 09-06-2006 11:54AM #1

Came across this link on the SA forums today.
I've never seen this type of optical illusion before
Check it out http://home.no.net/antska/

slipss · 09-06-2006 12:00PM

ha thats good, i love those optical illusion things

6th · 09-06-2006 12:03PM

best illusion i've seen yet - well done!

Alun · 09-06-2006 12:05PM

That's pretty cool indeed. This is one of my favourites, and no, before you ask, it's NOT an animated GIF, just a JPG image.

Ruu_Old · 09-06-2006 12:06PM

Neat, nice find

Crucifix · 09-06-2006 12:07PM

That first one was really great.

Terry · 09-06-2006 12:09PM

am i the only one who thought it was lame?
it was just some form of layering.
i want those 30 seconds back.

Crucifix · 09-06-2006 12:12PM

julep wrote:

am i the only one who thought it was lame?
it was just some form of layering.
i want those 30 seconds back.

It's not just layering. If you follow the instructions but look away for the thirty seconds it doesn't work.

09-06-2006 12:13PM

Crucifix wrote:

It's not just layering. If you follow the instructions but look away for the thirty seconds it doesn't work.

Yeah I tried that a few times - it really doesn't work unless you stare at the dot

Terry · 09-06-2006 12:19PM

all you have to do is move the cursor to the right of the screen.
they probably have it timed, so that it doesn't work until after 30 seconds have passed.

slipss · 09-06-2006 12:23PM

julep wrote:

all you have to do is move the cursor to the right of the screen.
they probably have it timed, so that it doesn't work until after 30 seconds have passed.

lol nah your wrong julep, its to do with negative afterimaging and the way your brain processes colour and memory, google negative afterimaging for a proper explanation.

negative afterimage - An optical phenomenon in which the eye's nerves continue to convey an image after an initial image has departed. Typically, the afterimage appears as a likeness of the initial image, except that each of its colors is the complement to those in the initial image. Sometimes called a complementary afterimage or a photogene.

Orlee · 09-06-2006 12:25PM

That is so cool!

Crucifix · 09-06-2006 12:27PM

julep wrote:

all you have to do is move the cursor to the right of the screen.
they probably have it timed, so that it doesn't work until after 30 seconds have passed.

I think you're doing it in reverse. You've got to move it too the right, and the black and white pic goes negative. Then you stare at the dot for thirty seconds, and when you move the mouse back the pic looks to be in the actually colours for a moment.

EWheelChair · 09-06-2006 12:31PM

Alun wrote:

That's pretty cool indeed. This is one of my favourites, and no, before you ask, it's NOT an animated GIF, just a JPG image.

Oh man, why don't they print wall paper like that? Imagine what the 60s would have been like :P

Terry · 09-06-2006 12:32PM

oh. right. that seems to make more sense.
i was looking at the black and white image and then moving the mouse.

and the dumbass of the year is...

xzanti · 09-06-2006 12:39PM

Link wont work for me

Paddy_Irishman · 09-06-2006 12:39PM

slipss wrote:

lol nah your wrong julep, its to do with negative afterimaging and the way your brain processes colour and memory, google negative afterimaging for a proper explanation.

negative afterimage - An optical phenomenon in which the eye's nerves continue to convey an image after an initial image has departed. Typically, the afterimage appears as a likeness of the initial image, except that each of its colors is the complement to those in the initial image. Sometimes called a complementary afterimage or a photogene.

Dont know what your rabbiting on about dude but maybe the 'trick' is as you say it in waffle terms.

you just wait for the image to appear, move your mouse off the screen, click the image then move your cursor off it again and it will turn a funky colour, obviously the colour that had been removed from the photo, and when you move your mouse back on to the pic it is in colour but if you move your eyes at all it reverts to black and white. Possibly that jibberish explanation above is it.

Basically, the black white pic has the colour element layered behind it when you click the image and move your mouse off it.

Plug · 09-06-2006 12:41PM

Best optical illusion I ever saw;)

Darragh29 · 09-06-2006 12:43PM

Thats brilliant!

Alkers · 09-06-2006 12:46PM

If you move your eyes from the dot after following the instructions the colour dissapears and if you focus on the dot again it goews back to colour, fairly class.

slipss · 09-06-2006 12:52PM

Paddy_Irishman wrote:

Dont know what your rabbiting on about dude but maybe the 'trick' is as you say it in waffle terms.

you just wait for the image to appear, move your mouse off the screen, click the image then move your cursor off it again and it will turn a funky colour, obviously the colour that had been removed from the photo, and when you move your mouse back on to the pic it is in colour but if you move your eyes at all it reverts to black and white. Possibly that jibberish explanation above is it.

Basically, the black white pic has the colour element layered behind it when you click the image and move your mouse off it.

ehhh, yeah thats how you do the trick, I was trying to explain why it works

Puteq · 09-06-2006 01:01PM

EWheelChair wrote:

Oh man, why don't they print wall paper like that? Imagine what the 60s would have been like :P

excellent idea! I think i am going to waste a lot of ink when i get home this evening and print off a few dozen pages and plaster one of my walls and see how it looks

MrJoeSoap · 09-06-2006 01:14PM

First one wouldn't work for me, so apologies if this is a re-post.

This one is quite good. Stare closely at the three small dots in the centre for 30 seconds, then move to a flat and clear part of a nearby wall and blink fairly rapidly for a couple of seconds. See what you can see.

stevenmu · 09-06-2006 01:29PM

It works on the principle of rod/cone depletion. The back of your eye has thousands of tiny little rods and cones, some sensitive to red, some to green and some to blue. When light of a particular colour falls on a rod/cone sensitive to that colour, it releases a chemical which triggers a signal to your brain. If you continually stare at that colour, the rod/cone temporarily runs out of the chemical needed and stops working.

In this illusion, staring at the dot keeps your rods/cones focused on the same spot. While your staring, the red and green rods/cones focused on say the sky become depleted. When the image changes to the black and white picture, the blue rods/cones focused at the sky have much more of the chemical left so the signal created by them totally overpowers the signal coming from the red and green rods/cones, tricking your brain into thinking that it's looking at something blue. Moving and refocusing your eyes changes which rods/cones are being pointed the sky and gives them all a chance to recharge which is why it goes back to black and white.

Cool illusion.

miju · 09-06-2006 01:37PM

jesus christ thats mental joe :-)

MrJoeSoap · 09-06-2006 01:45PM

miju wrote:

jesus christ thats mental joe :-)

Hehehe

xzanti · 09-06-2006 01:47PM

MrJoeSoap wrote:

First one wouldn't work for me, so apologies if this is a re-post.

This one is quite good. Stare closely at the three small dots in the centre for 30 seconds, then move to a flat and clear part of a nearby wall and blink fairly rapidly for a couple of seconds. See what you can see.

Hey

its the boss

WhiteWashMan · 09-06-2006 03:48PM

ahahahahahahaha.

i couldnt figure out what the hell was supposed to be so special until i realised the picture is black and white!

thats pretty cool

BrokenArrows · 09-06-2006 04:17PM

edit:never mind cool illusion

!_Brian_! · 09-06-2006 04:20PM

That was really cool! Nice one!

stevenmu · 09-06-2006 04:22PM

Lol, that's what I thought at first too

. The illusion part is that if you follow the instructions correctly, the mouseover image, which is in black and white will appear in colour.

Pretty cool optical illusion

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