Input & Output

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Professor Michael J. Losacco

CIS 1110


Using Computers

Input & Output

Chapter 5

Chapter

5

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/48

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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5

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/48

Input Device

Hardware to Enter Data & Instructions

Data

Text, Numbers, Images, Audio, Video

Instructions

Programs, Commands, User Responses

Chapter

5

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/48

Keyboard

Sections

Typing Area

Numeric Keypad

Function Keys

Special Keys

Wired

Uses USB

Wireless

Bluetooth, IrDA

Chapter

5

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/48

Keyboard

Mobile Devices

Smaller

Fewer Keys

Predictive Text

Predict Word Being Typed as It’s Typed

Allows for Faster Typing

Chapter

5

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/48

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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5

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/48

Pointing Devices

Notebooks

Touchpad

Sensitive to Pressure & Motion

Pointing Stick

Shaped Like Pencil Eraser

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5

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/48

Pointing Devices

Touch Screen

Touch Sensitive Display

Often Used with Kiosks

Touch Pad

Chapter

5

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/48

Pointing Devices

Pen

Digital / Stylus

Uses Pressure to Write & Draw

As Legal as Ink Signature

Chapter

5

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/48

Pointing Devices

Pen

Handwriting Recognition

Translates Handwritten Characters

Graffiti

Chapter

5

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/48

Voice

Recognition Mechanics

Step 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’re

right, rite, write

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5

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/48

Voice

Recognition Challenges

80% Accuracy

ESL Speakers

Women (High
-
pitched Voices)

People with Accents

Children

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5

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/48

Controllers

Gaming & Simulation

Gamepad

Joystick

Wheel

Light Gun

Dance Pad

Motion
-
sensing

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5

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/48

Smartphone

Navigation Receiver

Keyboard

Microphone

Camera

USB Sync

Chapter

5

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/48

Digital Camera

Resolution

Sharpness & Clarity of Image

Pixel

Single Point in Electronic Image

More Pixels Results in Better Image Quality

Chapter

5

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/48

Music

Record

Compose

Mix

Edit

Chapter

5

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/48

Video

Video Capture

Full
-
motion Recording into Computer

PC Camera

Record, Edit, & Capture Video

Web Cam

Video Camera Output Displayed on Web

Videoconferencing

Whiteboard

Chapter

5

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/48

Scanning

Light
-
sensing Device

Reads Printed Text & Graphics

Drum

Handheld

Sheet
-
fed

Flatbed

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5

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/48

Scanning

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

Chapter

5

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/48

Scanning

Bar Code

Uses Laser Beam to Read Bar Codes

Vertical Lines / Spaces of Different Widths

Symbology

1/300 v. 1/3,000,000

Chapter

5

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/48

Scanning

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

Chapter

5

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/48

Mobile Data Collection

Collect Data Where Transaction Occurs

Capture Data Directly From Source

Data Transfer

Wireless / Docking Station

Uses

Grocery Stores

Restaurants

Warehouses

Outdoors

Chapter

5

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/48

Mobile Data Collection

Advantages:

Saves Time

Lowers Labor Cost

Reduces Errors

Eliminates Extra Handling

Available Sooner for Analysis

Chapter

5

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/48

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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5

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/48

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

Chapter

5

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/48

Physically Challenged

Keyguard

Large Key Keyboards

Head
-
mounted Pointer

Controls Pointer on Screen

Gesture Recognition

Computerized Implant Devices

Chapter

5

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/48

Output

Data Processed into a Useful Form

AKA Information

Chapter

5

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/48

Display Devices

Monitor

Packaged as Separate Component

Quality

Resolution

Response Time

Brightness

Dot Pitch

Diagonal Distance Between Pixels

Contrast Ratio

Difference of Brightest White & Darkest Black

Chapter

5

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/48

Display Devices

LCD (Liquid Crystal Display)

Crystals Between Two Sheets of Material

Plasma

Applies Voltage to Layer of Gas

Larger Screen Size

More Expensive

Chapter

5

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/48

Display Devices

Video Card

AKA Graphics Card or Video Adapter

Chapter

5

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/48

Display Devices

Bit Depth

Number of Bits Used to Store Pixel Data

Determines Number of Colors Displayed

32
-
bit Video Card

2
32

= 4.3 Billion Colors

Chapter

5

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/48

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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5

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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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/48

Printers

Resolution

Sharpness & Clarity

Measured by DPI (Dots per Inch)

Speed

Measured by PPM (Pages per Minute)

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5

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/48

Printers

Non
-
impact

Doesn’t Strike Paper

Types

Ink
-
jet

Laser

Thermal

Photo

Label

Plotter

Portable

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/48

Non
-
impact Printers

Ink
-
jet

Sprays Tiny Drops of Ink onto Paper


Chapter

5

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/48

Non
-
impact Printers

Photo

Produces Photo
-
lab
-
quality Pictures

Many have Built
-
in Card Slot

Use Ink
-
jet Technology

Chapter

5

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/48

Non
-
impact Printers

Laser

High
-
speed, High
-
quality

DPI ranges from 600 to 2,400 dpi

Chapter

5

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/48

Non
-
impact Printers

Thermal

Uses Electrically Heated Pins

Heat
-
sensitive Paper

Thermal Wax
-
transfer

Dye
-
sublimation

Chapter

5

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/48

Non
-
impact Printers

Mobile

Small

Lightweight

Battery
-
powered

Print from:

Notebook

Smart Phone

Mobile Device

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5

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/48

Non
-
impact Printers

Label

Uses Adhesive
-
type Material

Most Print Bar Codes

Plotter

Produces High
-
quality Drawings

Chapter

5

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/48

Printers

Impact

Mechanism Strikes Inked Ribbon

Ribbon Contacts Paper

Ideal for Multipart Forms

Can Withstand

Dusty Environments

Vibrations

Extreme Temperatures

Chapter

5

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/48

Impact Printers

Dot
-
matrix

Pins on Print Head Strike Inked Ribbon

Line Printer

High Speed

Chapter

5

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/48

Audio

Produces Music, Speech, & Sounds

Speakers

Subwoofer

Headset

Earbuds

Sound Card

Chapter

5

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/48

Audio

Voice

Computer Talks to You Through Speakers

Internet Telephony

AKA VoIP

Make Voice Calls Using Internet

Comcast


Chapter

5

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/48

Other Output Devices

Multifunction

AKA All
-
In
-
One

Provides Functionality of

Printer

Scanner

Copy Machine

Fax Machine

Chapter

5

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/48

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

Chapter

5

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/48

Other Output Devices

Physical Challenges

Magnifier

Enlarges Items in Window on Screen

Braille Printer

Windows Settings

Increase Size / Change Color