MIT Explains: How Does Virtual Reality Work? - By MITK12Videos
Transcript
| 00:15 | Mhm . As much as I wish I could say | |
| 00:25 | that I'm enjoying a nice vacation at the beach . | |
| 00:29 | I'm not , I'm here in boston at MIT . | |
| 00:33 | So how did this little cardboard box make me feel | |
| 00:35 | like I'm miles away from where ? Actually ? And | |
| 00:37 | how did it create virtual reality ? Now ? If | |
| 00:41 | you open this little box up , it's pretty simple | |
| 00:43 | . There is a place to put your phone in | |
| 00:44 | and the rest of it looked like glasses with these | |
| 00:46 | two plastic lenses . Now it's this piece over here | |
| 00:49 | that's crucial to making me feel like I'm inside the | |
| 00:51 | video on my phone . It's what creates three D | |
| 00:54 | vision . Three D vision is actually pretty simple . | |
| 00:58 | We have two eyes that's about three inches apart . | |
| 01:01 | And because of the separation , each of our eyes | |
| 01:03 | sees the world from a slightly different perspective . Our | |
| 01:06 | brain fuses those two views and creates a sense of | |
| 01:09 | death . Hold out your thumb in front of you | |
| 01:11 | and close your left eye . Now try closing your | |
| 01:14 | right . I do you notice how your thumb jumps | |
| 01:16 | a little bit to the left or right and you | |
| 01:18 | switch between your eyes ? Now bring your thumb a | |
| 01:21 | little bit closer to you and do the same thing | |
| 01:24 | . It seems to jump even more right , depending | |
| 01:27 | on how close or far you hold out your thumb | |
| 01:29 | , it'll jump more or less . Our brain gets | |
| 01:32 | a sense of how far an object is , depending | |
| 01:34 | on how different it appears from the left versus the | |
| 01:36 | right eye and that's three divisions instead of one picture | |
| 01:40 | covering the whole screen . This video has two different | |
| 01:43 | images made for each eye that are ever so slightly | |
| 01:45 | offset . The cardboard box holds the image in the | |
| 01:49 | perfect distance to my eyes and divides the image into | |
| 01:52 | two so that each eye focuses on the image . | |
| 01:56 | This type of video , the stereoscopic display simulates what | |
| 02:00 | our eyes do naturally and folds our brains into thinking | |
| 02:03 | that it's looking at a three D . Image by | |
| 02:04 | creating a sense of depth . But the cardboard and | |
| 02:09 | the video do more than create really vision . When | |
| 02:12 | you move your head around , it actually reveals new | |
| 02:14 | areas of the video . The phone has a couple | |
| 02:17 | of sensors that measures position and angle , sort of | |
| 02:20 | like a Gps so it can track how your head | |
| 02:22 | is moving and as you move your head around , | |
| 02:25 | the images on the screen adjust so that you feel | |
| 02:27 | like you're not only looking at a video but actually | |
| 02:30 | walking through it . Now , if virtual reality is | |
| 02:36 | as easy as citing a phone into a cardboard box | |
| 02:39 | , why are we not all living in a virtual | |
| 02:41 | world today ? There's a couple of reasons . First | |
| 02:44 | reality is more than just what we see . If | |
| 02:46 | I really wanted to feel like I'm at a beach | |
| 02:49 | . What are some other elements that I would add | |
| 02:50 | in the feeling of sand between your toes ? The | |
| 02:54 | smell of salt water , the sound of wind . | |
| 02:57 | Exactly . But the other things that are harder to | |
| 03:00 | make virtual than vision , things like haptics , the | |
| 03:03 | science of touch will help us to better understand our | |
| 03:06 | real senses in order to simulate them in virtual reality | |
| 03:10 | by the way , simulating these other senses like taste | |
| 03:13 | , smell or touch will eventually help us to improve | |
| 03:16 | motion sickness , which a lot of people feel in | |
| 03:18 | virtual reality today . Also to create a fully immersive | |
| 03:21 | environment , even if it's just visual is a lot | |
| 03:24 | of work , it's way more than just filming a | |
| 03:26 | scene from two different perspectives . To create three D | |
| 03:29 | . Vision , you need to create or capture an | |
| 03:32 | entire three dimensional world where you can walk around and | |
| 03:35 | move your head to see all the possible views . | |
| 03:37 | Several companies are developing special software and cameras but it's | |
| 03:41 | still very expensive and time consuming to do this at | |
| 03:43 | high quality virtual reality is really cool . But even | |
| 03:47 | if it can create a perfect virtual reality , we | |
| 03:50 | wouldn't want to replace actual reality . We still like | |
| 03:52 | to experience some things in real life . Like so | |
| 03:55 | and as a society , we're just beginning to think | |
| 03:58 | about the ethical and moral aspects of creating simulated realities | |
| 04:01 | . So virtual reality may look simple but it's very | |
| 04:03 | complicated . The cool thing is that the better understanding | |
| 04:07 | we have a real reality , like how our senses | |
| 04:09 | were , the better virtual reality will get . Yeah | |
| 00:0-1 | . |
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