This document discusses human-computer interaction and devices for virtual and 3D interaction. It covers topics like virtual reality used for entertainment and education, 3D displays that provide a sense of depth, and input devices like 3D mice, data gloves, and VR helmets. It also discusses computer memory, storage formats, networks, models of interaction, and styles of interaction like command-line, menus, natural language, and 3D interfaces.

1. HUMAN COMPUTERINTERACTION
UNIT-I
INTRODUCTION
Prepared By
K.Thangadurai
Virtual Display
MEMORY
Interaction

2. DEVICES FOR VR AND 3D INTERACTION
 VR
 is the use of computer technology to create a simulated
environment
 Entertainment (i.e. gaming)
 Educational purposes (i.e. medical or military training)
 3D Space
 three values (called parameters) are required to determine the
position of an element (i.e., point)
 3D Displays
 A display which gives an effect of depth for the viewer

3. 3D Display creates the new
world.
The 3D display is the technology
providing the lively three dimensional
displays as if the object will come out
of the screen into your hand. It adds
the vividness to the conventional flat
displays.

4. DEVICES FOR VR AND 3D INTERACTION
 3D Mouse
 3D mouse is a pointing and control device specialized for
movement in virtual 3D (three-dimensional) environments
 https://www.youtube.com/watch?v=5Iyok24kIDk

5. DEVICES FOR VR AND 3D INTERACTION
 Data Glove
 is an input device
 contains sensors
 monitor the hand's
movements
 transform them into a form
of input for applications such
as virtual reality and
robotics.
 VR Helmet
 head-mounted device that
provides virtual reality for
the wearer.

6. DEVICES FOR VR AND 3D INTERACTION
 Whole Body Tracking

7. DEVICES: PHYSICAL CONTROL, SENSOR & SPECIAL
DEVICES
 Special Displays : head up displays
 Sound Output : Telephone Keypad
 Touch Feel & Smell :
 Haptic Devices : Mobile Phone touch / games /
vibration
 Physical Control : Washing Machines have
physical controls to do a task- Large Knobs
 Environment & Bio Sensing : Washbasin
controller

8. head up displays in Car

9. COMPUTER MEMORY
 Short Term Memory (STM)
 RAM : Random Access Memory
 Long Term Memory (LTM)
 Hard Disk, Compact, Floppy
Terms STM LTM
Media RAM Disk
Capacity GB TB
Access Time ns ms
Transfer Rate 100Mbps 30Mbps

10. COMPRESSION & STORAGE FORMATS
 Compression
 To reduce the amount of storage
 Compression Algorithms
Text : Fractal Compression : lossy compression
Video : Difference between successive frames
Image: Bit information
 Decompression : to any Quality
 Storage Formats & Standards:
 Text ; ASCII (8 bit), UNICODE(16bit)
 RTF: style sheets information
 SGML , XML – Own format

11. NETWORK
 1969 – Internet
 Communication
 Sharing of resources
 Web
 Web 1.0
Static pages.
 Web 2.0
participative social web, interaction and
collaboration
 Web 3.0
Dynamic content, online commenting

12. INTERACTION
 Interactive Models and Framework
 Describes the interaction in terms of the goals and
actions of the user
 Interaction Framework
 4 components
 System
 User
 Input
 Output
 Interface
 Task Language
 Core Language
 Input
 Output

13. INTERACTIVE CYCLE
 User formulates Goal
 Manipulate a Machine
 Execution Phase:
 Input Lang (task) is translated into Core Language
 Evaluation Phase
 System generates the output
 User Observes the output
 Compare it with Original Goal
 One Interaction Cycle : 4 Translations
 Articulation
 Performance
 Presentation
 Observation

14. NORMAN’S MODEL OF INTERACTION

15. STAGES IN NORMAN’S MODEL OF INTERACTION
Establishing the goal
Forming the interaction
Specifying the action sequence
Executing the action
Perceiving the system state
Interpreting the System State
Evaluating the System State with respect to
the Goals

16. ERGONOMICS: REFINE THE DESIGN : TO OPTIMIZE
IT FOR HUMAN USE
 Study of Physical characteristics of Interaction
 Deals with Design of Controls
 The environment in which the interaction takes place
 Physical Environment
 Working Environment
 Who is the user?
 What is the position of the user? (Sitting,
Standing, Moving)
 Size of the Users
 Period of use
 Use of color
 Temperature, Noise

17. INTERACTION STYLES
Number of Styles
 Command Line Interface
 Menus
 Natural Language
 Question/Answer and Query Dialog
 Form Fills and Spread Sheets
 WIMP
 Point and Click
 3D interface

18. Menus
CUI

19. Natural Language Instructions in terms of both words
(speech , written input)
User is asked a series of questions. By this
user can interact with the system
Question/Answer and Query
Dialog

20. Form Fills and Spread Sheets

21. WIMP
 Windows
 Icons
 Menus
 Pointers
POINTER & CLICK
 Hyperlinks
 Hotspots
3D INTERFACE
 3D paint