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Being Someone Else

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Introduction to Virtual Reality

Université de Londres

4.7 (328 notes) | 11K étudiants inscrits

Cours 1 de 5 dans Réalité virtuelle Spécialisation

This course will introduce you to Virtual Reality (VR). The course will teach you everything from the basics of VR- the hardware and the history of VR- to different applications of VR, the psychology of Virtual Reality, and the challenges of the medium. The course is designed for people who are new to VR as a medium. You may have experienced some virtual reality before, and may have some hardware- but this course is suitable to individuals who have never experienced VR and those who do not have much hardware- we will explain Mobile VR as well as devices such as the Oculus Rift and HTC Vive. Introduction to Virtual Reality is the first course in the Virtual Reality Specialisation. A learner with no previous experience in Virtual Reality and/or game programming will be able to evaluate existing VR applications, and design, test, and implement their own VR experiences/games using Unity by the end of the specialisation.

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4.7 (328 notes)

5 stars
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CS

Dec 18, 2017

This course was very informative. I also found it challenging, which is a good thing. I was introduced to aspects of VR that had not considered, such as the psychological aspects.

SA

Jun 12, 2018

This is best VR introduction course. I learned a lot of about VR apps, hardware, VR illusions and many more. Teachers are great in explanation of the content.

À partir de la leçon

VR Applications

This week, you’ll learn more about the different applications of VR- from news and documentaries, to sports, therapy, and games. You will also learn more about the VR Technical Framework, and will have the opportunity to share your thoughts on VR applications with your peers.

Introduction to Week 20:48

Introduction to the VR Technical Framework5:33

360 Video and Model Based VR6:53

Being Someone Else4:20

News and Documentary Films2:06

Scientific Data Visualisation3:32

Medical Training2:56

Physical Rehabilitation and Psychotherapy3:42

Enseigné par

Dr Sylvia Xueni Pan
Lecturer, Department of Computing
Dr Marco Gillies
Senior Lecturer

Transcription

In this video, I like to talk about a super strong but slightly weird illusion you could have in VR. The possibility of being somewhere else inside the HMD. To explain this idea, I will need to first go back to the two VR systems we are very familiar with. When I'm in the cave-like system, I can see virtual objects projected on the screen and I can also see through the shutter glasses any real objects that are inside the cave. That includes my own body. So when I look down, I see my body and when I reach out to interact with an object, or when I gesture with my friends, I can see my own hands. In the HMD, on the other hand, I am entirely blocked from the real world. So I can be deeply immersed in VR and feel that I am really somewhere else. But with lots of the applications of HMD, the moment I look down or reach forward with my hands, I would suddenly realize that something is missing because my brain automatically looks for my body, which is no longer there. For me, this is like a switch being flipped. From that moment on, I still feel that I'm immersed in a different world, but I don't feel that anything in the virtual world is as relevant anymore. There is a simple fix to this problem. You just need to give the user a self avatar. And if you manage to put it where the user expect their body to be, this will have a very strong effect. It will give the user a Proprioception Match. Proprioception here means someone's overall sense of the relative position of their own parts of the body. However, it might still be a good idea to tell the user to sit or stand in a fixed pose. This is because if they start moving their body and notice that their virtual body remains still, it will break the illusion. If you can afford a more sophisticated setup, then you can animate a body to move in the same way the user does. In this case, the user can see their self avatar as if he's in the mirror in front of them, and when they put their hands in front of themselves, they can also see them. This setup is supported by a Kinect sensor. A similar effect can also be supported by the VR controllers using their position rotation tracking data. Assuming users are holding the controllers with their hands, we can easily render a pair of hands where the controllers are. This will give user the strong illusion of seeing their own hands. You can do the same with 360 degree video. You strap your camera rig to someone and record the footage with them inside video. But like everything else in 360 video, you're stuck with what you have captured. If the footage is obviously recorded with a female body, then it is not something you can easily change. You also can't animate a body to make it match your own movements. So in most VR applications, it helps to at least have a static body where users expect their own body to be. So they feel that what happens in VR is physically relevant to them. This also enables us to do something even more interesting. To use Professor Mel Slater's words, VR can transform not only where you are but who you are. Because we can easily change the appearance and shape of our virtual body, we can choose to be somewhere else in VR. For instance, I have experienced being somewhere in VR with a different body shape, or a different gender, or from a different ethnic group. Those experiences have been proven to have very interesting and long lasting psychological effects on people. We will discuss more about that later in this course.

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