Chapter 5
Input & Output
Professor Michael J. Losacco
CIS 1110 – Using Computers
Overview
Chapter
5
Describe Types of Input
Identify Types of Pointing Devices
Explain How Voice Recognition Works
Describe Types of Scanners
Identify the Three Output Types
Identify Devices For Physical Challenges
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Input Device
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5
Hardware to Enter Data & Instructions
Data
Text, Numbers, Images, Audio, Video
Instructions
Programs, Commands, User Responses
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Keyboard
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5
Sections
Typing Area
Numeric Keypad
Function Keys
Special Keys
Wired
Uses USB
Wireless
Bluetooth, IrDA
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Keyboard
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5
Mobile Devices
Smaller
Fewer Keys
Predictive Text
Predict Word Being Typed as It’s Typed
Allows for Faster Typing
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Pointing Devices
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5
Mouse
Fits Under Palm of Hand
Controls Movement of On Screen Pointer
Pointer Shapes Indicate Current Function
Most Widely Used on Desktop Computers
Wired or Wireless
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Pointing Devices
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5
Notebooks
Touchpad
Sensitive to Pressure & Motion
Pointing Stick
Shaped Like Pencil Eraser
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Pointing Devices
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5
Touch Screen
Touch Sensitive Display
Often Used with Kiosks
Touch Pad
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Pointing Devices
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5
Pen
Digital / Stylus
Uses Pressure to Write & Draw
As Legal as Ink Signature
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Pointing Devices
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5
Pen
Handwriting Recognition
Translates Handwritten Characters
Graffiti
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Voice
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5
Recognition Mechanics
Step 1. User dictates text into microphone.
Step 2. Analog-to-digital converter
(ADC) translates sound waves into digital
measurements including pitch, volume,
silences, and phonemes.
10010111010110101100001101
Step 4. Software presents user with a list of
choices or uses a natural language component to
predict most likely match. User may correct any
selection made by software.
Step 3. Software compares spoken
measurements with those in its database to
find a match or list of possible matches.
Matches
yore, your, you’re
right, rite, write
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Voice
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5
Recognition Challenges
80% Accuracy
ESL Speakers
Women (High-pitched Voices)
People with Accents
Children
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Controllers
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5
Gaming & Simulation
Gamepad
Joystick
Wheel
Light Gun
Dance Pad
Motion-sensing
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Smartphone
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5
Navigation Receiver
Keyboard
Microphone
Camera
USB Sync
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Digital Camera
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5
Resolution
Sharpness & Clarity of Image
Pixel
Single Point in Electronic Image
More Pixels Results in Better Image Quality
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Music
Chapter
5
Record
Compose
Mix
Edit
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Video
Chapter
5
Video Capture
Full-motion Recording into Computer
PC Camera
Record, Edit, & Capture Video
Web Cam
Video Camera Output Displayed on Web
Videoconferencing
Whiteboard
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Scanning
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5
Light-sensing Device
Reads Printed Text & Graphics
Flatbed
Sheet-fed
Handheld
Drum
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Scanning
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5
Image Processing
AKA Imaging
Capture, Store, View, Print, & Edit Images
Convert Paper into Electronic Document
OCR (Optical Character Recognition)
Characters’ Shapes Determined
Converts Into Editable Text
OMR (Optical Mark Recognition)
Reads Hand-drawn Pencil Marks
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Scanning
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5
Bar Code
Uses Laser Beam to Read Bar Codes
Vertical Lines / Spaces of Different Widths
Symbology
1/300 v. 1/3,000,000
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Scanning
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5
RFID
Reads Tag Via Radio Waves
Uses
Manage Inventory
Toll Payments
Gauge Tire Pressure
Airline Baggage
Magnetic Stripe
Reads Magnetic Stripe on Back of Card
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Mobile Data Collection
Chapter
5
Collect Data Where Transaction Occurs
Capture Data Directly From Source
Data Transfer
Wireless / Docking Station
Uses
Grocery Stores
Restaurants
Warehouses
Outdoors
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Mobile Data Collection
Chapter
5
Advantages:
Saves Time
Lowers Labor Cost
Reduces Errors
Eliminates Extra Handling
Available Sooner for Analysis
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Biometrics
Chapter
5
Authenticates Person’s Identity
Verifies Personal Characteristic
Fingerprint
Hand Geometry
Shape & Size of Person’s Hand
Iris Recognition
Blood Vessel Patterns in Eye
Face Recognition
Voice Recognition
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Terminals
Chapter
5
Send / Receive Data To / From Host
POS (Point-Of-Sale)
Record Purchases
Process Credit / Debit
Update Inventory
ATM (Automated Teller Machine)
Self-service Banking Machine
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Physically Challenged
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5
Keyguard
Large Key Keyboards
Head-mounted Pointer
Controls Pointer on Screen
Gesture Recognition
Computerized Implant Devices
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Output
Chapter
5
Data Processed into a Useful Form
AKA Information
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Display Devices
Chapter
5
Monitor
Packaged as Separate Component
Quality
Resolution
Response Time
Brightness
Dot Pitch
Diagonal Distance Between Pixels
Contrast Ratio
Difference of Brightest White & Darkest Black
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Display Devices
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5
LCD (Liquid Crystal Display)
Crystals Between Two Sheets of Material
Plasma
Applies Voltage to Layer of Gas
Larger Screen Size
More Expensive
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Display Devices
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5
Video Card
AKA Graphics Card or Video Adapter
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Display Devices
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5
Bit Depth
Number of Bits Used to Store Pixel Data
Determines Number of Colors Displayed
32-bit Video Card
232 = 4.3 Billion Colors
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Display Devices
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5
Resolution
Number of Horizontal / Vertical Pixels
Sharpness & Clarity of Image
Higher Resolution
Sharper Image
More can be Displayed on Monitor
Some Elements Smaller
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Printers
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5
Produces Text & Graphics on Paper
Result is Hard Copy
AKA Printout
Portrait
Orientation
Orientations
Portrait
Landscape
Landscape
Orientation
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Printers
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5
Resolution
Sharpness & Clarity
Measured by DPI (Dots per Inch)
Speed
Measured by PPM (Pages per Minute)
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Printers
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5
Non-impact
Doesn’t Strike Paper
Types
Ink-jet
Laser
Thermal
Photo
Label
Plotter
Portable
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Non-impact Printers
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5
Ink-jet
Sprays Tiny Drops of Ink onto Paper
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Non-impact Printers
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5
Photo
Produces Photo-lab-quality Pictures
Many have Built-in Card Slot
Use Ink-jet Technology
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Non-impact Printers
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5
Laser
High-speed, High-quality
DPI ranges from 600 to 2,400 dpi
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Non-impact Printers
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Thermal
Uses Electrically Heated Pins
Heat-sensitive Paper
Thermal Wax-transfer
Dye-sublimation
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Non-impact Printers
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5
Mobile
Small
Lightweight
Battery-powered
Print from:
Notebook
Smart Phone
Mobile Device
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Non-impact Printers
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5
Label
Uses Adhesive-type Material
Most Print Bar Codes
Plotter
Produces High-quality Drawings
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Printers
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5
Impact
Mechanism Strikes Inked Ribbon
Ribbon Contacts Paper
Ideal for Multipart Forms
Can Withstand
Dusty Environments
Vibrations
Extreme Temperatures
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Impact Printers
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5
Dot-matrix
Pins on Print Head Strike Inked Ribbon
Line Printer
High Speed
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Audio
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5
Produces Music, Speech, & Sounds
Speakers
Subwoofer
Headset
Earbuds
Sound Card
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Audio
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5
Voice
Computer Talks to You Through Speakers
Internet Telephony
AKA VoIP
Make Voice Calls Using Internet
Comcast
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Other Output Devices
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5
Multifunction
AKA All-In-One
Provides Functionality of
Printer
Scanner
Copy Machine
Fax Machine
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Other Output Devices
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5
Data Projector
Projects Computer Image to Larger Screen
Force Feedback
Sends Resistance to Device
In Response to User Actions
Interactive Whiteboard
Displays Image on Connected Computer
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Other Output Devices
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5
Physical Challenges
Magnifier
Enlarges Items in Window on Screen
Braille Printer
Windows Settings
Increase Size / Change Color
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