Optical illusions, confusing
Optical illusion - the impression of a visible object or phenomenon that does not correspond to reality, that is, an optical illusion. Some visual illusions for a long time already have a scientific explanation, others still remain a mystery.
We edited Shram.kiev.ua collected and checked the coolest optical illusions. Be careful: some of the illusions can cause tearing , nausea and disorientation in space .
See three pretty girls?
Now turn the image around ...
Our brain rarely encounters inverted images, so it cannot notice the distortion in them.
Illusion 13 people
Initially, we see 12 people here, but after the movement there appears another one, the 13th.
Which way is the window open?
You can change the direction just by thinking about it.
Distortion of perception of movement
These blocks do not move one after the other - their speed is the same.
Look at the black dot in the center. Keep looking at it when the picture changes. See a color photo? Now take your eyes off the point.
It seems that the squares on the left are darker than the squares on the right. However, they are actually the same color.
Dynamic gradient brightness
Slowly bring your eyes to the screen and the “light” in the middle will become brighter. Move back and he will become weak again.
Concentrate on the green dot in the middle. After some time, the yellow dots will disappear one after the other. In fact, they remain in place, just static frames disappear from our consciousness if they are surrounded by constantly changing images.
The Four Circle Illusion
In fact, none of them intersect.
Be careful! This optical illusion can cause headaches for up to two hours.
The Droste effect is a looped recursive image.
Illusion of perception
The color of the strip in the center is actually uniform and the same along the entire length.
Roll the mouse wheel up and down and you will see how the poster "moves."
There are two photos, and between them there is one difference. Try to find it, and as soon as you notice the difference, it will be impossible not to see it.
If you cut a chocolate bar 5 by 5 and rearrange all the pieces in the order shown, then, out of place, an extra chocolate piece will appear.
Look at the cross in the center.
Peripheral vision turns beautiful faces into monsters.
Black and white or color
If you look closely at the dot in the center of the black-and-white image for 15 seconds, the picture acquires colors.
Figure Roger Shepard.
Which way is the wheel spinning?
Dragon gardner or dragon jeri andrus
The dragon Gardner or the dragon Jeri Andrus (on behalf of the creator), whatever he may say, always looks at the observer.
Same or different?
How can two cigarettes be at the same time different and the same size?
The optical effect, which creates a false impression on the viewer of the seat, is due to the original design of the chair, invented by the French studio Ibride.
Illusion of color
Without stopping, look at the cross and you will see how the purple spots will turn green. And then completely disappear.
Black and white illusion
See thirty seconds at four points in the center of the picture, then move your eyes to the ceiling and blink. What did you see?
At what point of the picture you would not focus your eyes, the picture never stops moving.
Are the colors of cage A and B different? The illusion of color perception, published by a professor at the Massachusetts Institute of Technology Edward Edelson (Edward H. Adelson) in 1995.
It seems that the four white lines move erratically. But it is necessary to impose on them images of squares, as everything becomes quite natural.
The birth of the animation
Animation image is obtained by overlaying a black grid pattern. Before our eyes, static objects begin to move.
Look, without blinking, in the middle of the image for 20 seconds, and then turn your eyes to someone's face or just a wall.
The fact that the sailor is so intently looking out of the telescope is hidden under his nose. Well, or not quite under your nose. In a word, try to find a girl in the picture.
A dog is hidden on this signboard in the bridal salon. Squint and, taking the man’s hand by the dog’s nose, try to see it.
Riddle for savvy
Riddle for savvy: where did the law of gravity? Why is water above and not below?
What are your associations?
What are your associations?
Well, how many heart-shaped figures are there?
What did the fisherman catch? Or whom?
Mountains and mountaineers
In the picture - not only the mountains, but, in fact, the highlanders. The only question is how many are there?
Who is here except fox
Besides the fox, someone else is hiding here. So who
How many frogs are there, surprising in the wonders of disguise?
What kind of people and animals are hiding in this mill?
Found 13 faces of people 1, 1 bear 1 eagle 1 darling 1 horse 1 cow, 1 woman!
While the girls are dancing, guys are peeping
While the girls are dancing, guys are peeping Can you see three guys here? Take a closer look!
The Ames room is an irregularly shaped room used to create a three-dimensional optical illusion. It was designed by American ophthalmologist Albert Ames in 1934 and built in 1935.
Scheme of true and apparent
the position of the person in the room
with Ames and the shape of this room
The Ames room is built in such a way that it looks like a normal cubic room with a back wall and two side walls parallel to each other and perpendicular to the horizontal planes of the floor and the ceiling. However, the true shape of the room is trapezoidal: the walls are tilted, the ceiling and the floor are also tilted, and the right corner is much closer to the observer who has entered the room than the left, or vice versa.
As a result of optical illusion, a person standing in one corner seems to be a giant as an observer, while a person standing in another corner seems to be a dwarf. The illusion is so convincing that a person going back and forth from the left corner to the right corner “grows” or “decreases” in front of his eyes.
Studies have shown that an illusion can be created without the use of walls and ceilings — to create a sufficiently visible horizon (which is actually not horizontal) against the corresponding background, and also to have the observer’s gaze fall on an object whose height exceeds the height of this horizon.
The principle of the Ames room is widely used in film and on television to create special effects, when a person is in fact of normal growth must be shown as a giant or a dwarf compared to others.
Red on white seems lighter,
on black - darker.
Closer to the left
white stripes appear redder
and red on black
to the right - whiter.
When translating a look at
the middle of the pattern from black to white stripes,
the latter are "shifting" up
Illusion of color perception of Adelson.
Tagged top parallelogram
it seems darker than the marked bottom;
label on the light parallelogram
it seems brighter and brighter than on the "dark"
Illusion of movement
(should look at the black dot
in the center and move your head back and forth;
circles around the point will move)
With long stare
in the "darkness of the pipe" strip
begin to "move."
When transferring a look at
F visible negative
architectures create illusion
then (concave) square well
Left or right
clockwise or counterclockwise
the silhouette will rotate depends
from the preferences of man.
The Illusion of "Circumference or Spiral?"
In fact, the centers are identical
The central band of one brightness
Small squares of the same brightness
Circles "bend" the sides of the square
Lattice illusion. When you move your gaze through the image, the white dots "turn" into black
Hexagonal grid creates the effect of the appearance of triangles of different sizes in different places
Changeling - "Utkozayats"
With prolonged gazing into the "darkness of the pipe," the bands begin to "move." When you move your eyes on F, you can see negative
The hinge bending directions appear mutually perpendicular (forward-backward or left-right)
And finally, to you all, a gift - a blooming flower !!!
Or not? ...
The red lines are parallel to each other! Or not?
What do you see - a spiral or just circles?
Look only at the point. Move your head back and forth ...
Look to the center. Move your head back and forth ...
Spirals or circles?
You must be moving ?
How many wolves are there? Must be five. Can you guess?
In the picture - 10 eagles. If you can see the six at once, then not four can find another four!
Consider the jaguars. Must be at least 10
One, the largest deer, we see immediately. But in the picture there are a few more classified ones. Your task is to find them.
How many horse heads are there?
What animals are hidden in the picture? Wolves - do not count!
We consider pandas. Must be 10.
Somewhere here, among the flowers, hid as many as 15 birds. Can anyone find them all?
The artist made a few mistakes on this picture. What kind?
Optical illusion (visual illusion) - an error in visual perception caused by inaccuracy or inadequacy of the processes of unconscious correction of the visual image (lunar illusion, incorrect estimate of the length of segments, angles or color of the depicted object, illusion of movement, the illusion of the absence of an object "- banner blindness .), as well as physical causes (“flattened moon”, “broken spoon” in a glass of water). The causes of optical illusions are investigated both when considering the physiology of vision and in the study of the psychology of visual perception.
In artistic images, deliberate distortion of perspective causes special effects, best known for the work of Maurice Escher ( see, for example, his lithographs: Up and Down (1947), Convex and Concave (1955), Belvedere (1958) and so on )
The creation of optical illusions was often the theme of the works of Salvador Dali ( see, for example, his paintings “The Slave Market with the Invisible Bust of Voltaire” (1938), “The Swans Reflected in Elephants” (1937), etc. ).
Some optical illusions were studied in the framework of Gestalt psychology ( eg Akiyoshi Kitaoka ).
Illusions of the visual system
There is an effect of visual perception when the observer consciously or involuntarily gives an inappropriate explanation of the picture he observes. It is well known to everyone who watched clouds running across the sky, sometimes taking the form of well-known visual objects. The same effect can occur when observing the picture of the distribution of shadows of three-dimensional objects at some of their angles with respect to light sources.
This explains the reports of observing a human head on Mars, etc., in the media, which form a sensation in mass media.
At the same time, the explanation of a randomly created spot is sometimes used by psychologists to ascertain the properties of the subject's intellect, whose optical illusion is deliberately called. (Rorschach stain test)
Illusions of color perception
For about a hundred years, it has been known that when an image appears on the retina consisting of light and dark areas, the light from brightly lit areas seems to flow into dark areas. This phenomenon is called optical irradiation.
One of these illusions was described in 1995 by a professor at the Massachusetts Institute of Technology Edward Adelson ( “the illusion of the shadow of Adelson” ). He noted that the perception of color essentially depends on the background and the same colors on different backgrounds are perceived by us as different, even if they are close and visible at the same time.
Depth perception illusions are an inadequate reflection of a perceived object and its properties. Currently, the most studied are the illusory effects observed in the visual perception of two-dimensional contour images. The brain unconsciously sees only one-convex (one-curved) drawings. Perception depends on the direction of the external (real or implied) lighting. 3D effect (2D images appear voluminous).
Negative disparity creates conditions for a person to perceive the illusion of reverse perspective. That is, if a person looks at a concave or convex object, for example, through a Pseudoscope, then in his field of view the object will look like a convex or concave, respectively. This illusion is best observed when considering simple symmetrical objects.
Illusions often lead to completely incorrect quantitative estimates of real geometrical quantities. It turns out that it is possible to make a mistake by 25% or more if eye estimates are not checked with a ruler.
Eye estimations of geometrical real values very much depend on the nature of the background image. This refers to the lengths (Ponzo illusion), areas, radii of curvature. It can also be shown that what has been said is true with respect to angles, shapes, and so on.
A shifter is a type of optical illusion in which the nature of the perceived object depends on the direction of the gaze. One of such illusions is “Utkozayats”: the image can be interpreted both as an image of a duck and as an image of a hare.
Stereo pairs superimposed on a periodic structure (Bela Yulles, Hungary) make it possible to observe a stereo image in the same way as a regular stereo pair. A periodic image facilitates the “dilution” of the eye (as a rule, to infinity), which, after focusing the eye at a distance of several tens of centimeters, allows you to see a stereo image.
The method allows to partially combine the stereopair images, removing restrictions on their size, however, it imposes some restrictions on the content of the drawings and is practically calculated using computers.
The room, invented by Adelbert Ames-ml . in 1946, is an example of a three-dimensional optical illusion. The room is designed in such a way that when viewed from the front it seems normal, with perpendicular walls and ceiling. In fact, the shape of the room is a trapeze, where the far wall is located at a very acute angle to one wall and, accordingly, at an obtuse angle to another. The right angle is thus much closer to the observer than the left.
Due to the illusion strengthened respectively by the distorted chess cells on the floor and walls, the man standing in the near corner looks like a giant compared to the one in the far corner. When a person moves from corner to corner, it seems to the observer that he is dramatically increasing or, on the contrary, decreasing.
The effect is enhanced when bending, rotating, approaching / removing the head:
- The still image seems to be moving.
- When viewing identical moving balls, you can see that they are of different sizes.
- The same animation image can represent a rotating object clockwise, counterclockwise or alternately (to perform oscillatory movements).