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  • Hi I'm Jake and today we're gonna be talking about illusions.

  • We've talked about them before here on dong and I've talked about them over on Vsauce3,

  • specifically in the video, Impossible Objects. Link down in the description.

  • There I talked a bit about MC Escher, the painter known for his fascination with illusions

  • and impossible shapes.

  • Now one of his most famous works is Metamorphosis, which depicts a series of repeating tessellated

  • objects morphing into other objects by breaking down into their simplest shapes and then into

  • newer more complex ones.

  • He made a whole bunch and you can make your own at escher.ntr.nl/en/mmm.

  • It's a pretty cool website. Here's what it looks like.

  • Wow.

  • Whoa.

  • Trippy.

  • MetamoFUNsis

  • That's a dong, something you can do online now guys.

  • One of the most basic tricks you can play on your senses is with lines.

  • The human brain is incredible, but it's not very fast, so it has to guess what's

  • going to happen next so it's not always late to the game.

  • One way it does this is by tracking the light that hits your retinas.

  • Many of the most common illusions are built to take advantage of this.

  • If we take this picture of Michael and add some lines he starts to get a little warped

  • and appears to be shifting and stretching like some sort of smart monster.

  • Also if you're wondering about this, this is a tiny toy

  • for my dog. I have a dog now. His name's Fajita. I love him.

  • Our brains add lines to moving objects to help us guess where they're coming from

  • and where they're going.

  • We can also play with lines at konsumer.js.org.

  • Now one of the ones we have here is a cat animation and it's similar to the illusion you get while watching a video.

  • It might look like there's actual motion happening, but really it's just a quick series of flashing

  • images.

  • Sped up really really fast you can see how each pixel is read from left to right one

  • after another.

  • In fact this illusion, called a zoetrope, is the direct ancestor of film.

  • So this website let's you make your own versions of this pre-video phenomenon.

  • You can put in any set of frames and the website with split them into overlapping lines of different

  • thickness.

  • As you pass the bar over them, some frames are blocked while the one you want to see

  • in the moment passes through.

  • The concept of the illusion of video isn't new to us because we've lived with video for all of our lives.

  • But when the concept of moving pictures, which comes from the Persistent Vision illusion, first

  • appeared, it was an incredible invention.

  • Almost immediately after the invention of film, another illusion was added to it, the

  • illusion of 3 Dimensional film.

  • Most people have an image of 3d films being red and blue filtered glasses and they'd

  • be right, but that technology is as old as 1915.

  • These days 3D films are make using a different technique, called polarization.

  • Normally when light hits a surface, the light scatters randomly in all directions.

  • In order to fake a 3D image, you have to project two slightly different angles onto the same

  • surface and thenpolarizethe light in order to make it more easily filtered out

  • by those paper glasses but now they also have plastic cool ones, Jack.

  • Guess you never got the cool plastic ones that they have for specific movies

  • like the Nightmare Before Christmas. They release that movie sometimes again around Halloween

  • and they have 3D glasses for it and they're pretty cool.

  • Here's a photo of them.

  • Now there are other ways to trick our brains into seeing 3d images.

  • Stereograms, also known as Magic Eye Puzzles, are a particularly strange set of illusions

  • that were very popular in the 80's and 90's. Back when I was a little baby

  • person.

  • And it takes advantage of the way our eyes process 3d images.

  • This website lets you make your own.

  • Just upload an image and the website will create your very own Magic Eye Puzzle.

  • And there's also some other parameters you can put in if you want.

  • If you've ever crossed your eyes looking at a wire fence or some other repeating pattern

  • and gotten your eyes kinda stuck, you've already experienced this trick to some extent.

  • Because each eye is relaying a slightly different image to the brain the brain has to guess

  • when it's looking at one thing, and when there are two things that look the same your

  • eyes can get confused.

  • Stereograms use this trick tolockyour eyes in a position that makes the differences

  • between them appear to be a 3D image.

  • So remember kids, don't trust your eyes, don't trust your brain.

  • The only thing you can trust is your DONG.

  • Now links to where you can make your own illusions is in the description but before we do that

  • let's meet my dog.

  • This is little Fajita.

  • Fajita's a beautiful boy. He's 10 weeks old. I just got him a few days ago.

  • And I love him so much.

  • Oh the dog's gone! It was an illusion!

  • You know what else is an illusion? Reality.

  • But if you wanna explore some cool websites links to the ones we talked about are down in the description.

  • And if you want more DONGs in your life there's a playlist right here.

  • Alright I'm gonna go play with Fajita.

  • And then I'm gonna drink a sparkling water and who knows maybe I'll have a sandwich or something.

  • I'm not entirely sure I haven't really thought that far ahead.

  • Uhh okay. And as always

  • Thanks for watching.

Hi I'm Jake and today we're gonna be talking about illusions.

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B1 illusion image website dong brain filtered

Make Your Own Illusion

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    林宜悉 posted on 2020/03/30
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