input & output

Professor Michael J. LosaccoCIS 1110 – Using Computers

Input & OutputChapter 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