Certaines illusions d'optique peuvent donner l'impression que des célébrités ont échangé leur genre, et cela repose sur notre façon de percevoir les visages. Richard Russell, un chercheur, a étudié comment le contraste des traits du visage joue un rôle majeur dans la perception d’un visage comme masculin ou féminin. Par exemple, les visages des femmes ont naturellement des yeux et des lèvres plus foncés par rapport à leur peau, ce qui leur donne un plus grand contraste, tandis que les visages des hommes ont moins de contraste. C’est comme un tour de magie pour votre cerveau, car cela repose sur notre câblage interne pour interpréter le genre à travers des détails subtils du visage. Voyons si cela et d'autres illusions d'optique peuvent tromper facilement votre cerveau. Animation créée par Sympa.
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Musique par Epidemic Sound https://www.epidemicsound.com
Pour ne rien perdre de Sympa, abonnez-vous!: https://goo.gl/6E4Xna
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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
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Si tu en veux encore plus, fais un tour ici:
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FunTranscript
00:00Look who it is, the one and only Timothée Chalamet.
00:04Two things we know about his appearance.
00:06He has an incalculable number of shoes in New York,
00:09and he has androgynous beauty.
00:11Do you want to see the proof?
00:13Very well.
00:14Let's get closer to his face and focus on his eyes,
00:17his nose and his mouth.
00:19Now, let's erase his beard and duplicate this image.
00:22On the left side, we will increase the contrast between his eyes,
00:26his lips and the rest of his face.
00:28On the right side, we will do the opposite by reducing the contrast.
00:31Do you see a difference?
00:33Does Timothée look more feminine or more masculine in one of the photos?
00:37According to a researcher named Richard Russell,
00:40facial contrasts significantly contribute to our perception of masculine and feminine faces.
00:45Feminine faces tend to be more attractive when their facial contrast is reinforced,
00:51while masculine faces are perceived as more attractive when their contrast is reduced.
00:56And if I told you that Margot Robbie could be in the same room as you in just a few seconds,
01:02believe me, you just have to focus on the red dot in the middle of this scary image.
01:07In a moment, but not yet,
01:09I will ask you to look at your ceiling and blink very quickly.
01:13Keep looking and you will see Margot Robbie just above you.
01:17Just wait a little longer and go!
01:20Look at your ceiling and start blinking.
01:23Have you seen Margot?
01:24If so, let us know in the comments below.
01:27Optical illusions surround us, much more than we realize.
01:31Think of these 3D crazy and viral advertising boards,
01:35which give the impression that products, animals and other things are jumping right in front of our eyes.
01:41What is really strange about them is that we see these 3D images,
01:46but we do not need these eccentric 3D glasses with red and blue glasses.
01:51The secret behind this trick resides in a well-known optical illusion called forced perspective.
01:56Yes, it is the same technique that tourists use when they want to take this classic photo where they seem to support the Tower of Pisa.
02:04Please do not do it.
02:06What happens is that our eyes, which are slightly separated,
02:09see each other in a different angle, what is called binocular disparity.
02:14Our brains then combine these points of view to create depth in the images we see every day.
02:19Thus, 3D display panels try to copy this.
02:23This is why they always have curved screens with two faces.
02:26In this way, animators can present similar images
02:30from slightly different angles on each screen to create a 3D illusion.
02:35It's strange.
02:37Here is half of Anya Taylor-Joy and half of Beyoncé.
02:41But were their photos taken face or profile?
02:46The correct answer is face, since they both look directly at the lens.
02:51However, because the photos are cut in profile silhouettes,
02:54we really have the impression that they are sideways.
02:57Do you want to make things even stranger?
03:00Let's mask the photos and leave only two black silhouettes.
03:03Now, what do you see?
03:05Two people looking at each other.
03:07Or a vase in the middle.
03:09This is a classic optical illusion called the Rubin vase.
03:13It was created around 1915 and is a famous example of ambiguous images.
03:19Everything depends on the way our brains interpret the contours and the context of the image.
03:24If the context is black, you will see two people.
03:28If the context is yellow, you will see the vase.
03:31But there is no good or bad here.
03:34Keep fixing the central cross.
03:36I know, I know, this image is disgusting, a little literally.
03:41But you got this far in the video, so don't stop now.
03:45Focus a little more on the cross.
03:47On the count of three, we will replace it with a photo of Shakira.
03:50Ready?
03:51One, two, three.
03:53And, wow, okay.
03:55Shakira's hips don't lie, but they move completely.
03:59This movement makes no sense since it is a static image.
04:02So what's going on?
04:04This phenomenon is known as the illusion of the waterfall.
04:07It is essentially a consecutive effect of the movement that occurs when you look at a stationary object
04:12after having fixed something moving in a direction for a certain time.
04:17The name comes from the same experience you feel
04:20after observing water in a waterfall moving in a direction for a few seconds.
04:25When you fix something moving in a direction like the water of a waterfall,
04:29the motion sensors of your brain focus on this downward movement.
04:34But after looking at it for a while,
04:36these neurons get a little tired of seeing the same downward movement
04:40and become less sensitive to it.
04:43Thus, when you finally look away,
04:46the neurons for the opposite movement, in this case upwards,
04:50suddenly seem to be more active in comparison.
04:54A similar phenomenon occurs here.
04:56Look at this dove.
04:58Even if the sky is red and seems a little weird,
05:01the dove is pure white.
05:03But keep fixing it and something strange will happen.
05:06In a few seconds, we will change the sky to white
05:09and the dove will look strange.
05:11Are you ready? Let's go!
05:13Boom!
05:14If you see what I see, the dove now seems to be red,
05:17more like a pale version of the red of the original background.
05:20This effect is called a positive remaining image.
05:24And you want to see something even more impressive?
05:27If we continue to alternate quickly between the two images,
05:30the effect becomes even stronger.
05:32Can you see it?
05:34Look at this point here.
05:36This illusion is known as the walking foot.
05:39And you will understand why it bears this name in just a few seconds.
05:43What you see here are two feet,
05:45one blue and the other yellow,
05:47moving fluidly and quickly on a horizontal line.
05:51Now, let's see what happens when we change this unified gray background
05:55by adding vertical stripes to the screen.
05:58Notice how we have the impression that the feet are taking small steps.
06:01One at a time, right?
06:03So, why does this happen?
06:05It's all a matter of contrast.
06:07When the blue foot passes on the white stripes,
06:10the dark blue against the bright white stands out,
06:13giving the impression that it moves faster.
06:15But when it crosses the black stripes,
06:17the contrast decreases,
06:19which makes it seem to slow down.
06:21The yellow foot does the opposite.
06:23It seems faster on the black and slower on the white.
06:26Now, if we remove the stripes,
06:28there is no more contrast change to alter our perception,
06:32and the illusion disappears.
06:34This optical illusion is the last on our list.
06:37And there is a good reason for that.
06:39It can have effects that last a long time,
06:42like hours, weeks,
06:44and some people have even declared effects for almost three months.
06:48So, are you ready?
06:50Close your eyes for a moment.
06:52Perfect. Now, open them.
06:54Look at this image and continue to fix your gaze.
06:57At first glance, it looks like a set of stripes,
07:00both horizontal and vertical, in the background.
07:03But these are not just any black lines.
07:06If you want to feel the lasting effects,
07:08you have to look at it for at least three minutes.
07:11So, if you feel brave,
07:13do not hesitate to pause the video to set a timer.
07:16Next step.
07:17Look at this red image.
07:19Focus on it.
07:20Once again, for the effect to last longer,
07:23you should look at it for about a minute and a half.
07:26Do not hesitate to pause the video
07:28to be able to fix it longer.
07:30Now, we have this green image,
07:32which is very similar to red.
07:34Keep looking at it.
07:35If you want to test its maximum power,
07:38to put it that way,
07:39pause the video and look at it for a minute and a half.
07:42Great.
07:43We now come to the grand finale.
07:45Here we are back at the starting point with the image in black and white.
07:49If the effect worked for you,
07:51you could see red and green shades in this image this time.
07:54But we promise you,
07:56we have not brought any color change.
07:58Everything is in your mind.