BT9403, Virtual Reality

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Assignment

DRIVE	FALL 2014
PROGRAM	BSC(NT)
SEMESTER	V
SEMESTER CODE & NAME	BT9403, Virtual Reality
BK ID	B1368
CREDIT	4
MARKS	60

1 What do you mean by virtual reality? Explain the three I’s of virtual reality.

Answer: Virtual reality: Virtual Reality (VR), sometimes referred to as immersive multimedia, is a computer-simulated environment that can simulate physical presence in places in the real world or imagined worlds. Virtual reality can recreate sensory experiences, which include virtual taste, sight, smell, sound, touch, etc. Virtual reality is often used to describe a wide variety of applications commonly associated with immersive, highly visual, 3D environments.

The development of CAD software, graphics

2 Define haptic feedback. Explain haptic sensing.

Answer: (a) Haptic feedback: Haptic / Tactile feedback (or haptics) is the use of advanced vibration patterns and waveforms to convey information to a user or operator. The word ‘haptics’ is derived from the Greek phrase ‘I touch’.

Many products are designed to

(b)Haptic sensing

Answer:  One area of research has been investigating the use of tactile information to recover 3-D object information. While acquisition of 3-D scene information has focused on either passive 2-D imaging methods (stereopsis, structure from motion etc.) or 3-D range sensing methods (structured lighting, laser scanning etc.), little work has been done using active touch sensing with a multi-fingered robotic hand to acquire scene

3 Define distributed VR engine. Write a note on multiple pipeline synchronization.

Answer: Distributed VR engine: Distributed VR is very simple; a simulated world runs not on one computer system, but on several. The computers are connected over a network (possibly the global Internet) and people using those computers are able to interact in real time, sharing the same virtual world. In theory, people can be sitting at home in London, Paris, New York and Edmonton, all interacting in a meaningful way in VR.

It's clear that there are a number of obstacles to be overcome in achieving this goal. The fact that we want people to be able to access if from their homes means that we have to be able to run over relatively limited-bandwidth links, such as 28.8k

4 Explain the first stage of haptic rendering.

Answer: Haptic rendering is the process of computing and generating forces in response to user interactions with virtual objects. Recent efforts by our team at MIT’s AI laboratory have resulted in the development of haptic interface devices and algorithms for generating the forces of interaction with virtual objects. This paper focuses on the software techniques needed to generate sensations of contact

Interaction and material properties. In particular, the techniques we describe are appropriate for use with the Phantom haptic interface, a force

5 Explain automatic cell segmentation process.

Answer: Traditional small volume cell processing is largely manual and only partially closed. Whilst arguably this approach is appropriate for research and early stage clinical trials, it introduces several significant commercialization challenges including:

v  Poor utilization of clean-room facilities

v  Dependence on high-cost, high-skilled labor

v  Processes are not readily scaleable

v  Regulatory approval of early stage

v   

6 What is Java 3D? Explain VRML files in Java 3D.

Answer: Java 3D: THE Java 3D API is an application programming interface used for writing three-dimensional graphics applications and applets. It gives developers high-level constructs for creating and manipulating 3D geometry and for constructing the structures used in rendering that geometry. Application developers can describe very large virtual worlds using these constructs, which provide Java 3D with enough information to render these

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