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Chapter 5. Input & Output. 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. Input Device. Hardware to Enter Data & Instructions - PowerPoint PPT Presentation
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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, VideoInstructions
Programs, Commands, User Responses
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Keyboard
SectionsTyping AreaNumeric KeypadFunction KeysSpecial 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 CodeUses 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 StoresRestaurantsWarehousesOutdoors
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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 IdentityVerifies 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 ComponentQuality
Resolution
Response Time
BrightnessDot Pitch
Diagonal 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
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-jetLaserThermalPhotoLabelPlotterPortable
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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