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Optical illusions confusing

Оптические иллюзии

Optical illusion - the impression of a visible object or phenomenon, not corresponding to reality, that is, optical illusion of sight. Some visual deceptions have long had a scientific explanation, others still remain a mystery.

We in the editorial office Shram.kiev.ua collected and tested the most steep optical illusions. Be careful: some of the illusions can cause tearing , nausea and disorientation in space .

See the three pretty girls?

Оптические иллюзии

Now turn the image ...

Оптические иллюзии

Our brain rarely encounters inverted images, so it can not notice distortions in them.

Illusion 13 people

Оптические иллюзии

Initially, we see 12 people here, but after the movement there is one more, the 13th.

Which way is the window open?

Оптические иллюзии

You can change the direction simply by thinking about it.

Distortion of perception of movement

Оптические иллюзии

These blocks do not move one behind another - their speed is the same.

Filling with color

Оптические иллюзии

Look at the black dot in the center. Keep looking at it when the picture changes. Have you seen a color photo? And now take your eyes from the point.

Contrast simulation

Оптические иллюзии
Оптические иллюзии

It seems that the squares on the left side are darker than the squares on the right. However, in fact they are the same color.

Dynamic gradient brightness

Оптические иллюзии

Slowly bring your eyes closer to the screen and the "light" in the middle will become brighter. Move back and it will become weak again.

Disappearing points

Оптические иллюзии

Concentrate your eyes on the green dot in the middle. After a while, the yellow dots disappear one by one. In fact, they remain in place, just static frames disappear from our consciousness, if they are surrounded by constantly changing images.

The Illusion of the Four Circles

Оптические иллюзии
Оптические иллюзии

In fact, none of them overlap.

Be careful! This optical illusion can cause a headache lasting up to two hours.

The Droste effect

Оптические иллюзии

The Droste effect is a looped recursive image.

The Illusion of Perception

Оптические иллюзии

The color of the strip in the center is actually uniform and the same along the entire length.

Moving poster

Оптические иллюзии

Roll the mouse wheel up and down and you will see how the poster "moves."

Selective perception

Оптические иллюзии

There are two photos here, and there is one difference between them. Try to find it, and once you notice the difference, you will not be able to see it.

Endless chocolate

Оптические иллюзии

If you cut a 5 to 5 tile of chocolate and rearrange all the pieces in the order shown, then, from now on, there will be an extra chocolate piece.

Look at the cross in the middle

Оптические иллюзии

Peripheral vision turns beautiful faces into monsters.

Black and white or color

Оптические иллюзии

If you look closely at the point in the center of the black and white image for 15 seconds, the picture acquires a color.

Impossible elephant

Оптические иллюзии

Roger Shepard's drawing.

Ferris wheel

Оптические иллюзии

Which way does the wheel spin?

The Dragon of Gardner or the dragon of Jerry Andrus

The dragon of Gardner or the dragon of Jerry Andrus (by the name of the creator) as he does not always look at the observer.

Same or different?

Оптические иллюзии

How can two cigarettes be of different and equal size?

The Invisibility Chair

Оптические иллюзии

The optical effect, which creates a false impression of the location of the seat, is due to the original design of the chair, invented by the French studio Ibride.

Illusion of color

Оптические иллюзии

Do not look up at the cross and you will see how the purple spots become green. And then completely disappear.

Black and White Illusion

Оптические иллюзии

See thirty seconds for four points in the center of the picture, then move your eyes to the ceiling and blink. What did you see?

Illusion of the interior

Оптические иллюзии

Pulsating poster

Оптические иллюзии

At what point of the picture you would not have focused your eyes, the picture never stops moving for a second.

Chessboard cells

Оптические иллюзии

Are the colors of cells A and B different from the chessboard? The illusion of color perception, published by Edward H. Adelson, professor at the Massachusetts Institute of Technology in 1995.

Ordering squares

Оптические иллюзии

It seems that the four white lines are moving chaotically. But it is necessary to impose images of squares on them, as everything becomes quite natural.

The birth of animation

Оптические иллюзии

An animation image was obtained by overlaying a black mesh on the drawing. Before our eyes, static objects begin to move.

Hypnosis

Оптические иллюзии

Look, without blinking, in the middle of the image for 20 seconds, and then look at someone's face or just a wall.

Sailor

Sailor - Pictures of the puzzle

The fact that the sailor looks so intently into the telescope is hidden under his nose. Well, or not quite under the nose In a word, try to find a girl in the picture.

The Hidden Dog

Hidden Dog - Puzzles Pictures

On this sign of the wedding salon the dog is hidden. Squint and take the man's hand at the dog's nose, try to see it.

Riddle for the quick-witted

Riddle for the quick-witted - Puzzles

The riddle for the quick-witted: where did the law of gravity go? Why is the water above, not below?

Association

Association - Puzzles Pictures

And what are your associations?

Association

Association - Puzzles Pictures

And what are your associations?

Hearts

Hearts - Puzzles Pictures

Well, how many heart shaped figures are there?

Fishing

Fishing - Puzzles Pictures

What did the fisherman catch? Or who?

Mountains and Highlanders

Mountains and Highlanders - Puzzles

In the picture - not only the mountains, but, in fact, the mountaineers. The only question is, how many of them?

Who is there but the fox?

Who is there but the fox? - Puzzles

In addition to the fox, someone else is hiding here. Who, then?

Frogs

Frogs - Pictures of the puzzle

How many frogs are there, surprising with the wonders of disguise?

Mill

Mill - Pictures of the puzzle

What kind of people and animals are hiding in this mill?

We found 13 persons of people 1, 1 bear 1 axle 1 mezhdu 1 horse 1 cow, 1 Zhenshinu!

While the girls are dancing, the guys are peeking :)

While the girls are dancing, the guys are peeking - Puzzles

While the girls are dancing, the guys are peeking :) Can not you see three guys here? Take a closer look!

Ames Room

Оптические иллюзии

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 was built in 1935.

Ames Room
The scheme of the true and apparent
position of the person in the room
with Ames, and the shape of this room

The Ames room is constructed so that from the front it looks like an ordinary cubic-shaped room with a back wall and two side walls parallel to each other and perpendicular to the horizontal planes of the floor and ceiling. However, the true shape of the room is trapezoidal: the walls are inclined, the ceiling and the floor are also inclined, and the right corner is much closer to the observer who enters the room than the left one, or vice versa.

As a result of optical illusion, a person standing in one corner seems to be an observer giant, while a person standing in another corner seems to be a dwarf. Illusion is so convincing that a person going forward and back from the left corner to the right corner "grows" or "decreases" in the eyes.

Studies have shown that an illusion can be created without the use of walls and ceilings - to create a visible horizon (which is not really horizontal) enough to create a corresponding horizon, and that the observer's eye fall on an object whose height exceeds the height of this horizon.

The principle of the Ames room is widely used in film and television to create special effects, when a person in fact normal growth needs to be shown as a giant or dwarf compared to others.

Illustrations

The illusion of "Circle or spiral?"
The illusion of "Circle or spiral?"
Running light green circle
Running light green circle
Red on white seems lighter, on black it's darker
Red on white seems lighter,
on black, it's darker.
Closer to the left
White stripes appear redder,
while the red ones on black
to the right, whiter.
When you look at
the middle of the drawing from the bands of black to white,
the latter "move" upwards
The illusion of Adelson's color perception
Illusion of the perception of Adelson's color.
Starred parallelogram
seems darker than the labeled bottom;
mark on a "light" parallelogram
seems brighter and lighter than on the "dark"
Parallelograms A and B, the line passing through them - all of the same color
Parallelograms A and B,
line passing through them
- all in one color
If you look at the parallelograms A, B for a long time and connect them, they will become the same color
If you look at
parallelograms A, B and their connecting,
then they will become the same color
Contrast illusion
Contrast illusion
The central band of one brightness
The central band of one brightness
In fact, the centers are identical
In fact, the centers are identical
Small squares of one brightness
Small squares of one brightness
Circles "bend" the sides of a square
Circles "bend" the sides of a square
Lines rest on illusory circles
Lines rest on illusory circles
The illusion of movement
The illusion of movement:
if you do not focus your eyes
in the figure it will seem,
that the spiral is spinning
The illusion of the lattice
Illusion of the lattice.
When you move the view
in the image white dots
"turn" into black
Illusory triangles
Illusory triangles
Illusion of perception of size
Illusion of perception of size
Hexagonal grating
Hexagonal grating
creates an appearance effect
triangles of different sizes
in different places
The illusion of movement
The illusion of movement
(you should look at the black point
In the center and move the head forward-backward;
circles around the point will start moving)
With prolonged peering into the "darkness of the pipe," the bands begin to "move"
With prolonged peering
in the "darkness of the pipe" strip
begin to "move."
When looking at
F the negative is visible
The illusion of the figure
Outgoing elements
architecture creates the illusion
figures alternately
(convex) (the "pyramid"),
then a (concave) square well
The illusion of the second white square
The illusion of the second white square
Directions of the hinge bend
Directions of the hinge bend
seem to be mutually perpendicular
(forward-backward or left-right)
The line of the circle of the lower image removes the illusion of a light illusory circle of the upper
Circle line of the lower
image eliminates the illusion
light illusory circle of the upper
Left or right, clockwise or counter-clockwise, the silhouette will rotate
Left or right,
clockwise or counterclockwise
will rotate the silhouette depends
from the preference of a person.
Another example of the illusion of movement
Another example of the illusion of movement
The McCullough effect
The McCullough effect:
at first glance it seems that
all the fragments of a square of the same color,
however, if you enlarge the image,
it will seem that the two fragments
have a dark red color.

Optical illusion

Optical illusion

The illusion of "Circle or spiral?"

Pictures of the puzzle

In fact, the centers are identical

Pictures of the puzzle

The central band of one brightness

Pictures of the puzzle

Small squares of one brightness

Pictures of the puzzle

Circles "bend" the sides of a square

Pictures of the puzzle

Illusion of the lattice. When you move the view over the image, the white dots "turn" into black dots

Pictures of the puzzle

The hexagonal grid creates the effect of the appearance of triangles of different sizes in different places

Pictures of the puzzle

Inverted "ducks"

Pictures of the puzzle

With prolonged peering into the "darkness of the pipe," the bands begin to "move." When you look at F, you see a negative

Pictures of the puzzle

The directions of the hinge bend seem mutually perpendicular (forward-backward or left-right)

Pictures of the puzzle

And finally to you all, a gift - A blooming flower !!!

Pictures of the puzzle

Or is it not worth it? ...

The red lines are parallel to each other! Or not?

What do you see - a spiral or just circles?

Look only at the point. At the same time move your head forward and back ...

Look at the center. At the same time move your head forward and back ...

Abstract Illusion

Spirals or circles?

Probably everything is moving with you :) ?

How many wolves are there? Must be five. Can you guess?

Pictures of the puzzle

There are 10 eagles in the picture. If six can be seen at once, then it's not possible to find four more!

Pictures of the puzzle

We count the jaguars. Must be at least 10

Pictures of the puzzle

One, the biggest deer, we see right away. But in the picture there are a few more classified. Your task is to find them.

Pictures of the puzzle

How many horseheads are there?

Pictures of the puzzle

What animals are hidden in the picture? Wolves - do not count!

Pictures of the puzzle

We consider pandas. Should be 10.

Pictures of the puzzle

Somewhere around here, among the flowers, there were as many as 15 birds. Could anyone find them all?

Pictures of the puzzle

The artist made several mistakes in this picture. Which ones?

Pictures of the puzzle

Optical illusion

Optical illusion (visual illusion) is a mistake in visual perception caused by inaccuracy or inadequacy of the processes of the unconscious correction of the visual image (lunar illusion, incorrect estimation of the length of segments, the angles or color of the depicted object, illusion of motion, "illusion of the absence of the object" - banner blindness, etc. .), as well as physical causes ("flattened moon", "broken spoon" in a glass of water). The causes of optical illusions are investigated both in the analysis of the physiology of vision and in the study of the psychology of visual perception.

In artistic images, the intentional distortion of perspective causes special effects, best known from the works 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 Salvador Dali's works ( see, for example, his paintings "The Slave Market with the Appearance of the Invisible Bust of Voltaire" (1938), "Swans that Reflect in Elephants" (1937), etc. ).

Some optical illusions were studied within the framework of Gestalt psychology ( eg . Akiyoshi Kitaoka ).

Illusions of the visual system

Optical illusion

There is an effect of visual perception, when the observer consciously or involuntarily gives an untrue explanation of the picture he observes. It is well known to everyone who has observed clouds running in the sky, sometimes taking the form of certain visual objects. The same effect can occur when observing the pattern of shadows distribution of three-dimensional objects at some of their angles with respect to light sources.

This is what explains the sensations in the mass media about the observation of the human head on Mars, and so on.

At the same time, the explanation of a randomly created spot is sometimes used by psychologists to find out the properties of the subject's intelligence, in which the deception is caused intentionally. (Rorschach spot test)

Illusions of color perception

Already for about a hundred years it is known that when an image appears on the retina of the eye, consisting of light and dark areas, the light from brightly lit areas flows into dark areas. This phenomenon is called optical irradiation.

One such illusion was described in 1995 by Edward Adelson, a professor at the Massachusetts Institute of Technology ( "Adelson's shadow of illusion" ). He drew attention to the fact 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 to us simultaneously.

Perception of depth

Illusions of perception of depth - inadequate reflection of the perceived object and its properties. At present, the most studied are the illusory effects observed in the visual perception of two-dimensional contour images. The brain unconsciously sees drawings only one-concave (single-concave). Perception depends on the direction of the external (real or implied) lighting. 3D effect (2D images seem to be voluminous).

Negative Disparity creates conditions for a person to perceive illusions of the reverse perspective. That is, if a person looks at a concave or convex object, for example, through a Pseudoscope, then in his field of vision the object will look convex or concave, respectively. This illusion is best observed when considering simple symmetrical objects.

Perception of size

Illusions often lead to completely incorrect quantitative estimates of real geometric quantities. It turns out that you can make a mistake of 25% or more if the eye measurements are not checked by a ruler.

Eye measurements of geometric real quantities depend very much on the background image. This refers to the lengths (Ponzo's illusion), areas, radii of curvature. It can also be shown that what has been said is also true with respect to angles, shapes, and so on.

Screws

Turning - a kind of optical illusion, in which the direction of view depends on the nature of the perceived object. One of these illusions is the "utkozayats": the image can be treated both as an image of a duck, and as an image of a hare.

Stereotypes

Stereopairs superimposed on a periodic structure (Bela Yulesh, Hungary) allow us to observe the stereo image in the same way as a conventional stereopair. The periodic image facilitates the "dilution" of the eyes (as a rule, to infinity), that after focusing the eyes a distance of several tens of centimeters allows you to see the stereo image.

The method allows you to partially combine stereopair images, removing restrictions on their size, but imposes some restrictions on the content of drawings and is almost calculated using computers.

Ames Room

Room, invented by Adelbert Ames-Jr . 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 trapezoid where the far wall is located at a very sharp angle to one wall and, accordingly, at an obtuse angle to the other. The right angle, therefore, is much closer to the observer than the left one.

Due to the illusion, reinforced by the distorted chess cells on the floor and walls, the person standing in the near corner looks like a giant compared to standing in the far corner. When a person goes from corner to corner, the observer seems to grow up or, conversely, decrease.

Moving illusions

The effect is enhanced by tilting, rotating, approaching / removing the head:

  • The still image seems to be moving.
  • When considering identical moving balls, you can see that they are of different sizes.
  • The same animated image can represent a rotating object clockwise, counter-clockwise or alternately (perform oscillatory movements).