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VISUAL (OPTICAL) ILLUSIONS
Illusions of color and contrast. Encyclopedia of visual illusions
At leisure / Visual (optical) illusions << Back: size illusions >> Forward: Aftereffect First, check for color blindness
normal vision
color blindness
How many colors are there besides white?
Four? In fact, only two - pink and green. Several shades of green and red just seem.
There are only three colors: yellow, red and blue.
How many colors are there?
Four? Wrong, only three. In this picture, pink and orange have been replaced with black:
Goering lattice
At the intersections of all the white stripes, with the exception of the intersection where you are fixing your eyes at the moment, small gray spots are visible.
Another variant of the Goering lattice
Do you see small red spots at the intersection of the black lines?
Goering grate effect in the shower
Defocused Goering reticle
If the Goering grid is defocused, then the black dots at the intersections (which are actually absent and are a sick imagination of our brain) begin to randomly appear and disappear. Move your eyes over the picture and the blinks will be more frequent.
How many shades of red are there?
Only one.
bouncing colors
When viewed for a long time, the turquoise crosses begin to change color to yellow, and the black squares turn red.
How many flowers?
The green border of the gray circles is your perception of strong contrast. She is not there. There are only 3 colors in the picture.
Eye following
Surprisingly, yellow dots only appear where you look.
purple dots
See the purple dots in the center of the flowers? If you look at only one of these points for a while, then all the others gradually disappear.
soaring petals
Flower petals seem to float above the green substrate.
Offset squares
The blue squares at the intersections of the red and green squares look offset, even though the side of the square is perfectly straight. By the way, not all people see this illusion of displacement. Color blind people, for example, see the straight sides of squares! The illusion is explained by the contrasting transition of colors.
Line shift
When considering this picture, the illusion of horizontal displacement of each line in relation to the surrounding lines is created.
Blue circles
If you look at the center of the image for a while, the blue circles will begin to change the saturation of the color tone.
Chromatism
If you look at the intersection of the squares, then at some point in time the intersection will turn red.
Flicker circles
Count the white and black dots on the circles.
Spiral
The gaps between the yellows in the spiral have a bluish tint (actually a shade of pure grey). At the same time, the density of the hue towards the center increases (in fact, the color density is the same everywhere).
gray on color
Depending on the background, the gray squares appear brighter or darker colored, although in fact all the squares have the same color and shade, as in the square to the right of the picture.
neon illusion
See the yellow in the center of the squares? In fact, it is not there, everything is pure white.
Сетка
See the gray stripes on the diagonals? In fact, there are no stripes in the picture.
bright dots
Look at one of the pictures for a while and you will see that the intersections with missing dots glow white (left picture) or very dark (right picture).
pink dot
Do you think the dot in the middle is pink? It's actually grey!
flashing dots
Move your eyes along the picture and you will see how the blue dots start flashing like light bulbs. The illusion is based on the classic Hering grid.
How many ants?
Take a quick look at the picture without counting the ants. Which ants are more? Red or white? Now count...
Achromatic contrast
The circles are the same shade of gray.
Chromatic Contrast
Surrounded by green, gray appears lilac-pink, and surrounded by red, blue-greenish.
Mach bands (edge contrast)
A smooth color transition is perceived as stripes. On the border of white, an even whiter stripe is visible, and on the border of black, an even blacker one. This illusion is caused by lateral inhibition in the retina.
Wertheimer-Koffka Illusion
Part of the ring on a white background appears darker. If you remove the pencil, then the illusion disappears.
Brightness Comparison
The left and right inner squares have the same brightness, although the left square appears to be lighter.
T-fusion illusion
Gray vertical rectangles of the same color and shade.
Snake
In figure A, all the diamonds have a different shade, although in fact, they are the same shade. This can be clearly seen if you remove part of the background that misleads you - see fig.B.
See the chessboard with black and white cells?
Gray halves of black and white cells of the same shade. Gray color is perceived as either black or white.
Color Constancy Look closely at the board. She is all right?
White cells in the shade and black in the light - the same color! However, the eyes do not notice this. The brain sees black and white cells regardless of the light!
Block-Gafter effect
On the left are rhombuses, on the right they were connected into a large rhombus, while the colors did not change.
Illusion of Moron-Bourg-Ross
In each rectangle, the right side (in the triangle) appears darker than the left, although in fact, the brightness is the same
colored circles
All yellow circles are the same size.
color distortion
Manker illusion. The red stripes on the top left and right picture are the same color. In the lower figures, green stripes of the same color.
Star
The color of star A is equal to the color of the dark part of star B.
karateka
Take a look at the top picture. The shade of the shadow of the karateka is different. In fact, the color of the shadow is the same, which can be clearly seen in the bottom picture.
red cubes
The red cubes at the top look darker than those at the bottom. In fact, the color and shade are the same. The illusion is caused by the contrast of the cubes and the background.
The color of the shapes appears brighter and more saturated when the shapes are framed with black borders.
The background color in the part of the picture where the hieroglyphs are not outlined in white seems to be more saturated
Is the center of the picture brighter?
The color on the edges and in the center of the picture is the same.
Which cell is brighter?
Cells A and B are the same color.
color distortion
In the top figure, areas 1 and 2 have the same background. Let's put circles with gradients on top of the picture, and as you can see in the two lower pictures, areas 1 and 2 began to have a different shade. In fact, regions 1 and 2 in all three figures have the same color.
Illusion of Knill and Kersten
In Figure 1, the squares appear to be the same. Let's move them together (Fig. 2) - it turns out they were different. To enhance the effect, we transform the squares into cubes, keeping the shade of the front side (Fig. 3). And then, we convert the cubes into cylinders (Fig. 4), as you can see, the "difference" effect has decreased.
Network
A color gradient creates the illusion of a three-dimensional image. "Pletenki" as if hung over an olive background.
Pavlin
The colors of both peacocks are the same.
Same colors
Green, red and blue colors are the same for the whole drawing, although they look different.
Day and night
The right girl looks darker than the left, although in fact, they are the same.
Color change
Look at the square in the center, the background color of which is different from the rest of the background. After a while, you will see that the background color of the adjacent squares has changed to lighter, although it is the same, in relation to the peripheral squares.
Bright on dark
The gray background under the red dot looks lighter than under the blue dot. Actually, the gray background is lighter under the blue dot!
golden squares
The squares look different. Each square is filled with an olive color gradient. The left side is darker, the right side is lighter. One large square, in which there are small ones, is also filled with a gradient, only with a wider range of colors. But all the little squares are the same color.
Shades of red
There are four shades of red here.
And here are three.
dual green
The green background is the same everywhere, although it seems that the color is more saturated in the central square.
Depth perception
Look at the picture. Don't you think that the transition of gradients creates the illusion of volume (depth)?
Aliens
All diamonds are made up of four small diamonds with the same gradient. But when looking at the picture, an illusion is created that some of the diamonds are orange, some are purple.
horses color
It may seem strange to you, but the horses are completely identical in both color and shade. Feel free to check! And they look different because of the illusion that arises due to the contrast of the background.
Yellow and more yellow
Look at the animated picture. Squares appear with a frequency of 1 time per second. Each new square looks more yellow than the previous one. In fact, the color of the squares is identical. They are exactly the same. But the transition of the gradient from yellow to red creates this effect.
Grey-green circles
All circles of the same color are grey. Although in the left area of the picture they look greenish due to the contrasting background.
Nets
The black dots in the grids flicker in different colors.
Three colours
In this picture, only 3 colors are used: light green, purple and yellow.
Color perception
Borders around blue squares appear orange, those around yellow squares appear lilac-violet. In fact, the color of the frames is the same.
four cards
Look at the grid squares inside each "card". See 2 green and 2 blue? In fact, all 4 grids are the same color.
See the arrows?
What color arrows did you notice first?
color spots change
Move your head back and forth. The colored spots will change their size. << Back: size illusions >> Forward: Aftereffect
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