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Professor Michael J. LosaccoCIS 1110 – Using Computers
Input & OutputChapter 5
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5
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Overview
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
Hardware to Enter Data & InstructionsData
Text, Numbers, Images, Audio, Video
InstructionsPrograms, Commands, User Responses
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Keyboard
SectionsTyping Area
Numeric Keypad
Function Keys
Special Keys
WiredUses USB
WirelessBluetooth, IrDA
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Keyboard
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
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
Notebooks
Touchpad
Sensitive to Pressure & Motion
Pointing Stick
Shaped Like Pencil Eraser
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Pointing Devices
Touch Screen
Touch Sensitive Display
Often Used with Kiosks
Touch Pad
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Pointing Devices
Pen
Digital / Stylus
Uses Pressure to Write & Draw
As Legal as Ink Signature
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Pointing Devices
Pen
Handwriting Recognition
Translates Handwritten Characters
Graffiti
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Voice
Recognition MechanicsStep 2. Analog-to-digital converter (ADC) translates sound waves into digital measurements including pitch, volume, silences, and phonemes.
10010111010110101100001101
Step 3. Software compares spoken measurements with those in its database to find a match or list of possible matches.
Matches
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 1. User dictates text into microphone.
yore, your, you’reright, rite, write
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Voice
Recognition Challenges
80% Accuracy
ESL Speakers
Women (High-pitched Voices)
People with Accents
Children
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Controllers
Gaming & Simulation
Gamepad
Joystick
Wheel
Light Gun
Dance Pad
Motion-sensing
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Smartphone
Navigation Receiver
Keyboard
Microphone
Camera
USB Sync
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Digital Camera
Resolution
Sharpness & Clarity of Image
Pixel
Single Point in Electronic Image
More Pixels Results in Better Image Quality
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Music
Record
Compose
Mix
Edit
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Video
Video CaptureFull-motion Recording into Computer
PC CameraRecord, Edit, & Capture Video
Web CamVideo Camera Output Displayed on Web
Videoconferencing
Whiteboard
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Scanning
Light-sensing Device
Reads Printed Text & Graphics
Drum
Handheld
Sheet-fed
Flatbed
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Scanning
Image ProcessingAKA 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
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
RFIDReads Tag Via Radio Waves
UsesManage Inventory
Toll Payments
Gauge Tire Pressure
Airline Baggage
Magnetic StripeReads Magnetic Stripe on Back of Card
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Mobile Data Collection
Collect Data Where Transaction OccursCapture Data Directly From SourceData Transfer
Wireless / Docking Station
UsesGrocery Stores
Restaurants
Warehouses
Outdoors
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Mobile Data Collection
Advantages:
Saves Time
Lowers Labor Cost
Reduces Errors
Eliminates Extra Handling
Available Sooner for Analysis
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Biometrics
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
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
Keyguard
Large Key Keyboards
Head-mounted Pointer
Controls Pointer on Screen
Gesture Recognition
Computerized Implant Devices
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Output
Data Processed into a Useful Form
AKA Information
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Display Devices
Monitor Packaged as Separate Component
QualityResolution
Response Time
Brightness
Dot PitchDiagonal Distance Between Pixels
Contrast RatioDifference of Brightest White & Darkest Black
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Display Devices
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
Video Card
AKA Graphics Card or Video Adapter
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Display Devices
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
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
Produces Text & Graphics on Paper
Result is Hard Copy
AKA Printout
Orientations
Portrait
Landscape
Portrait Orientation
Portrait Orientation
Landscape Orientation
Landscape Orientation
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Printers
Resolution
Sharpness & Clarity
Measured by DPI (Dots per Inch)
Speed
Measured by PPM (Pages per Minute)
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Printers
Non-impactDoesn’t Strike PaperTypes
Ink-jet
Laser
Thermal
Photo
Label
Plotter
Portable
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Non-impact Printers
Ink-jet
Sprays Tiny Drops of Ink onto Paper
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Non-impact Printers
Photo
Produces Photo-lab-quality Pictures
Many have Built-in Card Slot
Use Ink-jet Technology
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Non-impact Printers
LaserHigh-speed, High-quality
DPI ranges from 600 to 2,400 dpi
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Non-impact Printers
Thermal
Uses Electrically Heated Pins
Heat-sensitive Paper
Thermal Wax-transfer
Dye-sublimation
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Non-impact Printers
Mobile
Small
Lightweight
Battery-powered
Print from:
Notebook
Smart Phone
Mobile Device
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Non-impact Printers
LabelUses Adhesive-type MaterialMost Print Bar Codes
PlotterProduces High-quality Drawings
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Printers
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
Dot-matrix
Pins on Print Head Strike Inked Ribbon
Line Printer
High Speed
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Audio
Produces Music, Speech, & Sounds
Speakers
Subwoofer
Headset
Earbuds
Sound Card
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Audio
Voice
Computer Talks to You Through Speakers
Internet Telephony
AKA VoIP
Make Voice Calls Using Internet
Comcast
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Other Output Devices
Multifunction
AKA All-In-One
Provides Functionality of
Printer
Scanner
Copy Machine
Fax Machine
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Other Output Devices
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
Physical Challenges
Magnifier
Enlarges Items in Window on Screen
Braille Printer
Windows Settings
Increase Size / Change Color