Les illusions d’optique sont des tours incroyables qui font que votre cerveau voit des choses qui ne sont pas réellement là ou qu'il interprète les images de manière étrange. Certaines illusions peuvent faire paraître des images plates comme si elles ressortaient en 3D, alors qu'elles sont complètement plates ! Il y en a aussi où vous pourriez voir deux images différentes selon votre manière de vous concentrer, comme une image qui ressemble à la fois à un canard et à un lapin. Ensuite, il y a des illusions qui jouent avec la taille, faisant paraître un objet beaucoup plus grand qu'un autre, même s'ils ont en réalité la même taille. Certaines illusions vous donnent même l'impression que l'image bouge ou tourne alors qu'elle est parfaitement immobile. Tout cela repose sur la manière dont vos yeux et votre cerveau travaillent ensemble, jouant des tours qui déforment votre perception de la réalité ! Animation créée par Sympa. ---------------------------------------------------------------------------------------- Musique par Epidemic Sound https://www.epidemicsound.com Pour ne rien perdre de Sympa, abonnez-vous!: https://goo.gl/6E4Xna ---------------------------------------------------------------------------------------- Nos réseaux sociaux : Facebook: https://www.facebook.com/sympasympacom/ Instagram: https://www.instagram.com/sympa.officiel/ Stock de fichiers (photos, vidéos et autres): https://www.depositphotos.com https://www.shutterstock.com https://www.eastnews.ru ---------------------------------------------------------------------------------------- Si tu en veux encore plus, fais un tour ici: http://sympa-sympa.com
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00:00Are you able to read between the lines, or to unravel something to hide in images of anodine appearance?
00:06Let's take the first illustration.
00:08Do you see a feminine silhouette, or the word, hope?
00:12Both are valid, and it is fascinating to see that some first perceive the woman, then the word,
00:18while for others, it is the opposite.
00:21Another intriguing aspect of this illusion lies in the perfect alignment of the letters that make up hope.
00:27Although the background leads your brain to believe that they are inclined.
00:31Extending the observation of this image could tire your eyes, so let's move on to the next one.
00:36What colors are the balls you see here?
00:39I have the clear impression of seeing blue, red and green.
00:43If this is also your case, we make both mistakes.
00:46In reality, all the balls are of the same shade of brown.
00:50The lines arranged in front and between them deceive the brain by giving it the illusion of multiple colors.
00:57Well, let's look at what is going on here.
01:00At first glance, it seems to be a simple degraded square, but it could well be a surprise.
01:06Do you have the impression that this square is moving?
01:08This should not be the case, because the image is perfectly stable.
01:12This illusion recalls the magic of some 3D patterns.
01:17I mainly use ChatGPT to find ideas for dinner when I lack inspiration.
01:21But a Reddit user recently asked her to imagine a color still unknown to man.
01:27I doubt that we can truly speak of a color in the strict sense.
01:31It is rather a conceptual interpretation of what such a color could be.
01:36Those who have tried to perceive something have reported strange phenomena.
01:40This is similar to one of these optical illusions where you have to fix the image.
01:44After observing it for a moment, did you also distinguish the word woman or just me?
01:52Here is another creation of ChatGPT.
01:55The composition of the shapes and dark and luminous nuances
01:58drag the brain in an infinite spiral.
02:01Some Reddit users have confided that they would like to live in this surrealist village.
02:06For my part, I would follow them willingly.
02:10Now let's try a more elaborate illusion.
02:12That of the chests.
02:14What do you discern here?
02:15Let me guess.
02:1720 squares?
02:18They are also called chests.
02:21These rectangular shapes have encased panels that are often found on the ceiling.
02:25This visual illusion was discovered by a psychology professor
02:29in the context of research intended for future experiments.
02:33Are you ready for the big revelation?
02:3616 circles are hidden between the squares.
02:39This visual illusion has been a great success.
02:42You first perceive the squares, because your brain favors the corners and angles.
02:47Probably because the clear lines provide him with more crucial information than the curves.
02:52In addition, the rectangular shapes are omnipresent around us.
02:56Computer screens, panels, buildings, to name a few.
03:01The next illusion has caused a lot of online discussion
03:05and I would like to know your opinion.
03:07What do you distinguish behind this fan of colors?
03:09Is it a baboon or maybe a lion?
03:12Some see it as a bear, while another interpretation evokes a migal.
03:17For my part, I would rather opt for a human silhouette.
03:20But here, no answer is truly good or bad.
03:25Get ready for another illusion that has aroused controversy on the Internet.
03:30Some people claim that they feel the effect of 3D glasses by looking at it.
03:35The red circle seems to float in the foreground,
03:38while the blue appears as a simple background.
03:41Others, however, do not perceive anything special in this image.
03:45If you perceive this 3D effect, it is thanks to a subtle game of optics
03:49that triggers when your eyes fix adjacent colors.
03:53It then becomes difficult for them to focus on the two colors simultaneously.
03:57This phenomenon is explained by the differences in wavelength of the colors,
04:01which correspond to the dimensions of the luminous waves that each color produces.
04:05Your brain fails to integrate them harmoniously,
04:08and illusions are formed, making you see things that are not really there.
04:13Here is the impossible triangle, also called the Penrose triangle.
04:18Do you see what is wrong?
04:20In an ordinary triangle, the three sides join harmoniously,
04:24each imbuing itself in the next.
04:26At first glance, the Penrose triangle seems to respect this rule,
04:30but by looking at it more closely,
04:32we see that one of its sides seems to be simultaneously located at the front
04:36and at the back of another side, which is impossible in the real world.
04:40This is why we qualify this figure as an impossible object.
04:43If you tried to reproduce it using sticks or blocks,
04:47the assembly would inevitably fail, because it contravenes the laws of geometry.
04:52Other impossible figures exist, which have four sides or more.
04:58Ready for the next illusion?
05:00The two red lines seem to be curved inwards,
05:03although in reality they are perfectly straight.
05:06This illusion is part of these visual tricks that give linear drawings
05:10a strange or deformed appearance.
05:13Scientists believe that this phenomenon occurs
05:16because our brain tries to interpret the angles formed by the intersections of the lines.
05:21In the presence of sharp angles,
05:23our brain sometimes tends to perceive them as more pronounced than they really are.
05:28Here, the blue lines cross the red ones,
05:31misleading our brain
05:33and pushing it to perceive a curve towards the inside of the red lines.
05:39So, what do you see here?
05:42A bright white triangle placed on other figures.
05:45Congratulations, you have just been trapped by the Kanitsa pattern.
05:49There is actually no triangle in this image.
05:52What you see are actually three forms evoking Pac-Man.
05:56Our eyes and our brain are remarkably able to fill in the missing elements
06:01and perceive complete shapes,
06:03even when they are not really there.
06:06This is why we perceive a triangle that seems brighter
06:10and seems to be above Pac-Man shapes,
06:12when it is just an illusion.
06:14There is another similar phenomenon,
06:17the Kanitsa square,
06:18where your brain also perceives a square that is not really there.
06:24If you have a miniature train circuit at home,
06:27you can observe the next illusion in action.
06:30You just have to take two segments of identical size curves
06:33and place them side by side.
06:35One of them will then appear much larger than the other.
06:38But wait!
06:39You have just seen for yourself that these pieces were identical.
06:43In fact, your brain makes a comparison between the two sides of the adjacent segments.
06:49It analyzes the right side of the track on the left
06:52compared to the left side of the track on the right.
06:55Let's move on to something else before the train arrives.
06:58Here we have 12 points, all of the same color.
07:01Mauve.
07:02Now, try to fix the cross located in the center of this ring of points.
07:07When a mauve point disappears momentarily,
07:10a green point takes its place.
07:12Amazing!
07:13This green point gradually erases other mauve points
07:16as it moves around the circle.
07:18This illustrates the effect of images remaining in action.
07:21The sticks and cones of your eyes adapt to the constant disappearance of mauve points,
07:26replacing them with a color located at the opposite end of the spectrum,
07:30which gives you the impression of seeing green.
07:35How many colors can you see here?
07:37Did I hear someone say 3?
07:39Or maybe 17?
07:40There is no right or wrong answer.
07:43It was the Austrian physicist Ernst Masch
07:46who was the first to observe this paradox.
07:49You can easily distinguish similar colors
07:51or slightly contrasting shades when they are close to each other.
07:55However, as they move away,
07:57the difference becomes more and more difficult to perceive,
08:00and at some point, it becomes almost indistinguishable.
08:03If you are unable to distinguish the contrasting colors here,
08:07this can be due to the way your brain is structured,
08:10or to a slight offset of your contrast and brightness parameters.
08:15How many black dots can you identify in this image?
08:18There are 12 in total,
08:20but most people cannot see them all at the same time,
08:23even if they are perfectly visible.
08:25Your peripheral vision is not accurate enough
08:28to be able to see each dot,
08:30except when you look at them directly.
08:33Your brain must therefore fill these gaps,
08:36and the white between the gray lines
08:38leads you to think that these dots are black dots.
08:42In this way, it concludes that there is in fact only more gray,
08:45and that black dots are absent.