The Daily Croissant - Filed under 'Illusion'

Motion Induced Blindness ~ The yellow dots disappear...
- 29 Jan 2012
- 0 Responses
- views
- Blindness Illusion January 29 2012 Motion
- Edit
- Delete
- Tags
- Autopost
What to see
Below you see a rotating array of blue crosses and 3 yellow dots. Now fixate on the centre (watch the flashing green spot). Note that the yellow spots disappear once in a while: singly, in pairs or all three simultaneously. In reality, the 3 yellow spots are continuously present, honest !

What to do
You can use the slower/faster buttons to change speed. Disappearance persists down to surprisingly low speeds. [ If there are no buttons on the right, please update your Flash player.]

You can use the larger/smaller buttons to change size. Disappearance persists up to surprisingly large sizes.

You can use the “back-col” button to change the background colour. The yellow dots disappear into whatever colour the background has.

The ‘defaults’ button at the top restores the standard settings.

via msf-usa.org

Sent by Bob...Thanks !
"Raspberries"
- 24 Jan 2012
- 0 Responses
- views
- Illusion January 24 2012
- Edit
- Delete
- Tags
- Autopost
"Raspberries"_ Copyright A.Kitaoka 2004 (May 8)

The inset appears to move.

This motion illusion belongs to Type I, not the periphral drift illusion.

via psy.ritsumei.ac.jp
"On Seeing Reddish Green and Yellowish Blue"
- 22 Jan 2012
- 0 Responses
- views
- Illusion January 22 2012 Light Perception color
- Edit
- Delete
- Tags
- Autopost
"Try to imagine reddish green — not the dull brown you get when you mix the two pigments together, but rather a color that is somewhat like red and somewhat like green. Or, instead, try to picture yellowish blue — not green, but a hue similar to both yellow and blue.

Is your mind drawing a blank? That's because, even though those colors exist, you've probably never seen them. Red-green and yellow-blue are the so-called "forbidden colors." Composed of pairs of hues whose light frequencies automatically cancel each other out in the human eye, they're supposed to be impossible to see simultaneously.

The limitation results from the way we perceive color in the first place. Cells in the retina called "opponent neurons" fire when stimulated by incoming red light, and this flurry of activity tells the brain we're looking at something red. Those same opponent neurons are inhibited by green light, and the absence of activity tells the brain we're seeing green. Similarly, yellow light excites another set of opponent neurons, but blue light damps them. While most colors induce a mixture of effects in both sets of neurons, which our brains can decode to identify the component parts, red light exactly cancels the effect of green light (and yellow exactly cancels blue), so we can never perceive those colors coming from the same place.

Almost never, that is. Scientists are finding out that these colors can be seen — you just need to know how to look for them."

via lifeslittlemysteries.com
Three Rivers
- 14 Jan 2012
- 0 Responses
- views
- Illusion January 14 2012
- Edit
- Delete
- Tags
- Autopost
Copyright Akiyoshi Kitaoka 2006

Illusion A) When observers approach the image keeping their eyes fixed on the central river, the outer rivers appear to approach the central one.

Illusion B) Each river appears to expand laterally.

Illusion C) The image sometimes appears to move horizontally (swinging-motion illusion).

Illusion D) Illusory orange streaks appear to run across the rivers parallel to bridges.

via psy.ritsumei.ac.jp
Two-Stroke Apparent Motion
- 9 Jan 2012
- 0 Responses
- views
- Illusion January 09 2012
- Edit
- Delete
- Tags
- Autopost
"The illusion contains two pattern frames depicting a moving image (hence two-stroke) which are displayed using a technique that creates an impression of continuous forward movement."

via illusioncontest.neuralcorrelate.com
"Leaf Wave"
- 2 Jan 2012
- 0 Responses
- views
- Illusion January 02 2012
- Edit
- Delete
- Tags
- Autopost
"Leaf Wave"
The image appears to wave. Click on image to enlarge.
Copyright Akiyoshi Kitaoka 2011 (December 24)

via psy.ritsumei.ac.jp
Islamic Art and "Magic Eye" Images
- 18 Dec 2011
- 0 Responses
- views
- 17December11 Geometry Illusion Islamic Magic Eye
- Edit
- Delete
- Tags
- Autopost
"David Brewster, a nineteenth-century scientist… observed a related form of stereo illusion. Gazing at wallpaper with small repetitive motifs, he observed that sometimes, with the proper convergence or divergence of gaze, the patterns might quiver or shift and then jump into startling stereoscopic relief, seeming to float in front of or behind the wallpaper.

…it seems likely that such “autostereograms” have been experienced for millennia, with the repetitive patterns of Islamic art, Celtic art, and the art of many other cultures. Medieval manuscripts such as the Book of Kells or the Lindisfarne Gospels, for example, contain exquisitely intricate designs done so exactly that whole pages can be seen, with the unaided eye, in stereoscopic relief. (John Cisne, a paleobiologist at Cornell, has suggested that such stereograms may have been “something of a trade secret among the educated elite of the seventh- and eighth-century British Isles.”)

In the past decade or two, elaborate autostereograms have been widely popularized in Magic Eye books." - Oliver Sacks, The Mind’s Eye
Those unfamiliar with "Magic Eye" books can read about them at Wikipedia. The embedded image is "Geometric arabesque tiling on the underside of the dome of the Tomb of Hafez in Shiraz." For extensive research on Islamic design, visit the Catnaps.org website..

via tywkiwdbi.blogspot.com

Click on the image to see the answer.
(Need help viewing 3D ?)

via magiceye.com
Magic Carp-pet à la Moiré
- 17 Dec 2011
- 0 Responses
- views
- 16December11 Animation Carpet Design Illusion Moire
- Edit
- Delete
- Tags
- Autopost
The magical rug literally animates!!

When the rug is viewed through the specially designed glass coffee table, an animation of carp appears through a moire effect providing a surprise element of natural liveliness to the interior. The graphic apparition, replacing the traditional fish tank, is also a nod to the decreasing abundance of our most precious natural resource – water. Mythologically, the carp symbolises bravery and fortune. Linguistically, the “carp” becomes a humorous extraction of the “carpet” that reveals this intriguing little conversational piece on the floor.

“Mythologically, the carp symbolizes bravery and fortune.”

via john-leung.com

Moiré Pattern
The Spinning Disks Illusion
- 4 Dec 2011
- 0 Responses
- views
- 03December11 Illusion
- Edit
- Delete
- Tags
- Autopost
"When sets of disks with tangential greylevel gradients are arranged in concentric circles (see image above, most observers perceive these disks moving around the centre, similar to Kitaoka’s ‘snake illusion’. This motion illusion is enhanced for large-scale and bright images and depends to a large extent to dynamic changes in the stimulus such as elicited by involuntary eye movements or blinks – fixating the centre of the pattern does abolish the illusion, whereas scanning the picture the motion sensation. A reliably effective version of this illusion, which does not require eye movements (i.e. persists when observers fixate the target in the centre of the image), can be generated by modulating the background luminance of the array of disks."

via illusioncontest.neuralcorrelate.com
A Flying Carpet, Not
- 30 Nov 2011
- 0 Responses
- views
- 29November11 Flying Carpet Illusion
- Edit
- Delete
- Tags
- Autopost
"This photo was called an "accidental optical illusion" when it was posted at Reddit. I think that's a very apt description. Apart from the flag shadow paralleling the board, there's also the flagpole shadow oriented reasonably well re the microphone boom."

via tywkiwdbi.blogspot.com
« Previous 1 2 3 Next »

About

A Walk-about in this Amazing Universe...
Please Tweet !

627102 Views
Archive
- 3000 (1)
  - January (1)
- 2999 (1)
  - January (1)
- 2997 (1)
  - January (1)
- 2012 (302)
  - February (47)
  - January (255)
- 2011 (3058)
  - December (274)
  - November (264)
  - October (264)
  - September (298)
  - August (326)
  - July (309)
  - June (310)
  - May (266)
  - April (190)
  - March (222)
  - February (187)
  - January (148)
- 2010 (2206)
  - December (213)
  - November (205)
  - October (173)
  - September (184)
  - August (157)
  - July (137)
  - June (174)
  - May (184)
  - April (131)
  - March (231)
  - February (222)
  - January (195)
- 2009 (709)
  - December (202)
  - November (259)
  - October (185)
  - September (63)
Get Updates

Subscribe via RSS

Twitter Facebook