• 2 days ago
Préparez-vous à douter de vos yeux et de votre cerveau ! 🤯 Ces illusions d'optique sont si folles qu'il vous faudra vous frotter les yeux pour vous assurer que vous voyez bien ce que vous pensez voir. Est-ce que ça bouge, ou votre esprit vous joue-t-il des tours ? Ces couleurs sont-elles même réelles ? 🌀🎨 Vous ne croirez pas à quel point ces illusions peuvent perturber votre perception de la réalité. Elles sont amusantes, frustrantes, et totalement époustouflantes tout à la fois. Alors plongez et découvrez si vous pouvez toutes les déchiffrer — c'est parti ! 👀✨ Animation créée par Sympa.
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Category

😹
Fun
Transcript
00:00Something weird is about to happen.
00:03Concentrate on this cross here.
00:05Ignore the crazy wheel of celebrities that turn around the edges.
00:08And whatever you do, do not blink.
00:11Just keep fixing the cross in the middle.
00:13Now, tell me.
00:15Have you noticed that our beautiful favorite celebrities
00:18are starting to look like something from a monster movie?
00:21There is no special effect here.
00:23Believe me, all this is happening only in your mind.
00:27Thus, when you are presented with a series of pictures aligned in this way,
00:31one after the other, your brain starts to bug.
00:34It mixes them and gives them a deformed look.
00:37Before you even realize it,
00:39even the most impeccable features of the Barbie and Ken of Hollywood,
00:43that is to say of Margot Robbie and Ryan Gosling,
00:46begin to twist, to crush or to stretch.
00:49And it's cold in the back.
00:51Here is now an animation of four faces alternating between Selena Gomez and Demi Lovato.
00:57Are you ready?
00:58These faces will continue to pass from one side to the other.
01:01But they will also turn in a circle.
01:03Fix this cross and resist the urge to turn your eyes away.
01:06If you stay focused in the center,
01:09it will be almost impossible for you to detect the metamorphosis between their faces.
01:13The transition seems delayed,
01:16as if it were happening barely.
01:18But when we stop the rotation movement,
01:21BOOM!
01:22It is clear that the metamorphosis was taking place at the same speed.
01:27I present to you the illusion of rotating rays.
01:30If you see what I see,
01:32the outer ring seems to turn in the direction of the needles of a watch,
01:36while the inner ring seems to turn in the opposite direction of the needles of a watch.
01:40But what is strange
01:42is that these circles do not move at all.
01:45The eye movements play a huge role in the creation of this effect.
01:50When you continue to move your gaze around the image,
01:53the illusion of movement persists.
01:56But we can make things more interesting
01:59by placing a photo of Kim Kardashian in the center.
02:02Focus only on her face
02:04and try not to blink.
02:06You notice that the rings seem to slow down
02:09or even stop.
02:10Weird, right?
02:12This illusion was created by a Japanese teacher
02:15known for having conceived a multitude of amazing illusions.
02:18Like this one,
02:19where it looks like rollers with blue dots are going to each other.
02:23Or this one,
02:24where yellow rings seem to go up and down,
02:27almost as if they were getting closer.
02:29But once again,
02:30it is neither animation nor gif.
02:33The movement only occurs in your mind.
02:36The picture, the cry, is frightening in itself.
02:38But an optical illusion can make it even stranger,
02:41giving it practically life.
02:43If we add a small front and back zoom movement
02:45to the iconic work of Munch,
02:47the haunted face seems to grow and shrink,
02:50almost as if it were jumping on you.
02:52It makes the cry really real, doesn't it?
02:55Of course,
02:56this illusion of delayed effects is not only reserved for painting.
03:00We could do the same with a photo of Rihanna's concert.
03:04Fix your gaze on the center of the image
03:06and you will start to see it move,
03:08almost as if you had a place in the front row
03:11during a live performance.
03:13Well,
03:14it may not be as great as seeing Rihanna for real,
03:17but it is still quite impressive.
03:20Then,
03:21we have this picture of a fairly ordinary chest of drawers.
03:24But I would ask you to pay special attention
03:26to the boxes marked with the letters A and B.
03:29Are they the same color or different?
03:32Most people say with confidence
03:34that box A is darker
03:36and that box B is lighter.
03:38But what is strange
03:40is that they are actually exactly the same shade of gray.
03:44One of the 50 shades of gray?
03:46Sorry,
03:47I couldn't help it.
03:48Let's move on.
03:49How does it work?
03:51Well, box B is located in the shadow of this cylinder.
03:55Your brain automatically thinks,
03:57hey,
03:58shadows make things darker,
04:00so it illuminates box B to compensate for the shadow.
04:04While box A, which is outside the shadow,
04:07remains as it is.
04:10Now let's talk about the illusion of the trombone.
04:13If you take a simple grid
04:15and add perfectly straight diagonal lines to it,
04:18something strange happens.
04:20They will seem curved or broken to you.
04:22This is called the illusion of the trombone
04:24because some people say
04:26that the lines look like a row of trombones.
04:28You don't see it?
04:29Well, there is a solution.
04:31If you look at the image from the corner of the eye,
04:33the effect becomes stronger.
04:35So let's put a picture of Timothée Chalamet in the corner.
04:38Fix your gaze on him
04:40and, in your peripheral vision,
04:42you will notice that these straight lines
04:44now seem to be curved,
04:46like a bunch of trombones floating.
04:48Do you see now?
04:50Another interesting aspect is
04:52that the effect changes if we adjust the thickness of the lines.
04:54By thickening them, instead of trombones,
04:56we start to see something that looks like chains.
04:59But if we do the opposite,
05:01by making the lines thinner,
05:03they will look more like wavy ribbons.
05:05Here, we have pictures of two pairs of crocs.
05:08And we can all agree that this one is pink
05:11and that this one is green, right?
05:13Great!
05:15But let's make it a little more difficult with this new image.
05:17So, what color are these crocs?
05:20Look carefully and tell me.
05:22Which option do you think you saw?
05:24Number 1, 2 or 3?
05:26Do you have the answer?
05:29If you have chosen option 1, you are right.
05:32These crocs are actually pink,
05:34but they seem gray because there is a green filter on the image.
05:38The lighting deceives our eyes
05:40by making them see colors differently.
05:42White objects, like socks,
05:44become green,
05:46while pink objects, like crocs,
05:48take on a kind of gray hue.
05:50This illusion of consistency of colors
05:53demonstrates how much the lighting can deceive our brain.
05:58Here is another illusion, pink.
06:01This time, we have an image with a white circle in the middle.
06:04Now, let's add a little movement.
06:07I know this animation is intense,
06:09but keep fixing the black X in the center.
06:13Suddenly, this white circle seems to take a pale pink hue.
06:17It's almost as if the red and white pixels were mixing.
06:21A similar phenomenon occurs with this red and white grid.
06:25Concentrate again on the black X in the center.
06:28You will notice that when the grid suddenly becomes entirely white,
06:32the red spaces can still seem slightly pink.
06:36The explanation is that when you fix the X,
06:39your eyes get used to seeing the red and white edges.
06:42This adaptation effect leaves a remaining image in your vision,
06:46and your brain clings to the red so strongly
06:49that when it is removed, it replaces the white with a touch of pink.
06:52For our last magic trick,
06:54here is an illusion called the Pogendorf triangles.
06:58What do you see when you look at this strange shape?
07:01Do you see two assembled triangles, one here and the other there?
07:05It would seem logical.
07:07But that's not what's going on.
07:09I mean, yes, there are indeed two triangles in this image,
07:13but not in their positions.
07:15What is actually happening is that your brain thinks
07:17that an imaginary diagonal line crosses them,
07:20as if these two edges were connected
07:22and were part of the same line.
07:24But in truth, these edges do not connect at all.
07:28You see, they are actually two distinct lines that are not aligned.
07:32As I said earlier, there are indeed two triangles in this image,
07:36but they do not present themselves exactly as we expected.
07:40Let's separate these shapes, and here they are.
07:43This illusion works like this.
07:45When we see partially hidden objects,
07:47our brain somehow creates imaginary contours
07:50to make things more logical.
07:52But these contours do not really exist.
07:55The same thing happens here.
07:57Your brain thinks that this image is simply strange,
08:00and it tries to understand it by filling the empty spaces in the middle.
08:04So, you end up seeing the gray areas
08:07as being part of a single translucent rectangle,
08:10but they do not actually exist.
08:12Pretty crazy, isn't it?

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