A short view of human computer interface.

1. Welcome to Our
Presentation
Human Computer Interface

2. Presented To:
S.M. Kamrul Hasan
Lecturer, Dept. Of EEE.
Daffodil International University.
Presented by:
Salauddin Rubel_161-15-7033
Anisur Rahman _161-15-7107
Warid hasan_161-15-7142
Fahima khatun_161-15-7380

3. Content
• Introduction to Interface
• History Of Interface
• Types of Interface
• Architecture of HCI
• ExistingTechnologies
• Reference

4. What is HCL?
The means of communication between a human user
and a computer system, referring in particular to the
use of input/output devices with supporting software.

5. History of HCI
The long history of user interfaces spans the decades from the primitive punched-card days of the
1950s, through the typed command lines of the 1960s, to the familiar windows and icons of today and
beyond.
• 1822: The Babbage Analytical Engine
• 1950s: Punched cards
• 1960s: The Command Line Interface (CLI)
• 1951: The Light Pen
• 1952: The Trackball.
• 1963: The Mouse
• In 1980, the optical mouse was developed
• 1980s: The Graphical User Interface.
• 1984: Multi-touch
• 2000s: Natural User Interface
• The future: Direct Brain-Computer Interface

6. Types of Interface
• Command Line Interface

7. • Menu driven interface.
Types of Interface

8. • Graphical user interface.
Types of Interface

9. • Natural language interface.
Types of Interface

10. Architecture of HCI
• Architecture of any HCI systems is identified by:
 Number of inputs and outputs in the system
 Diversity of inputs and outputs in terms of modality
 Workings of these diverse input and output for interaction purpose
• Based on different configuration and design of interface, HCI systems can be divided into:
 Uni-modal HCI system
 Multimodal HCI system
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11. Uni-modal HCI System
• An interface mainly relies on number and diversity of its inputs and outputs which are
communication channels that enable users to interact with computer via this interface.
• A system that is based on only one modality is called unimodal.
• Based on the nature of different modalities, they can be divided into three categories:
 Audio-Based
 Sensor-Based
 Visual-Based
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12. Multimodal HCI System
• Combination of multiple modalities, or usage of more than one independent channel signals for the
interaction between a user and a machine is termed as multimodal human computer interaction
system (MMHCI).
• A classic example of a multimodal system is the “Put That There” demonstration system.
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13. Existing Technologies
• The existing interfaces differ in the degree of complexity both because of degree of functionality or
usability.
• The user activity has three different levels:
 Physical
 Cognitive
 Affective
• The existing physical technologies for HCI basically can be categorized by human senses.
• These devices are basically relying on three human senses: vision, audio, and touch.
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14. Audio Based HCI
• It deals with information acquired by different audio signals.
• The information gathered from audio signals can be more trustable, helpful and in some cases unique
providers of information.
• The main research areas of Audio based HCI are divided into:
 Speech Recognition
 Speaker Recognition
 Auditory Emotion Analysis
 Human-Made Noise/Sign Detections
 Musical Interaction
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15. Sensor Based HCI
• The common feature in every application is that at least one physical sensor is used between machine and human
to provide interaction.
Pen-Based Interaction Motion Tracking Sensors/Digitizers
Pressure Sensors
 Haptic Sensors
 Keyboard, Mouse, Joysticks
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16. Visual Based HCI
• It is also called as machine vision which is the observation of an environment using
cameras. Detection, identification and tracking of a real life entity and its translation
into meaningful machine/computer input.
Facial Expression Analysis
Body Movement tracking and Gesture recognition
Gaze Detection
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17. References
• http://en.wikipedia.org/wiki/Human_Computer_Interface
• http://www.encyclopedia.com/computing/dictionaries-thesauruses-
pictures-and-press-releases/human-computer-interface
• http://www.livescience.com/37944-how-the-human-computer-
interface-works-infographics.html