Professor Michael J. LosaccoCIS 1110 – Using Computers

Input & OutputChapter 5

Chapter

5

2/48

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

Chapter

5

3/48

Input Device

Hardware to Enter Data & InstructionsData

Text, Numbers, Images, Audio, Video

InstructionsPrograms, Commands, User Responses

Chapter

5

4/48

Keyboard

SectionsTyping Area

Numeric Keypad

Function Keys

Special Keys

WiredUses USB

WirelessBluetooth, IrDA

Chapter

5

5/48

Keyboard

Mobile Devices

Smaller

Fewer Keys

Predictive Text

Predict Word Being Typed as It’s Typed

Allows for Faster Typing

Chapter

5

6/48

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

Chapter

5

7/48

Pointing Devices

Notebooks

Touchpad

Sensitive to Pressure & Motion

Pointing Stick

Shaped Like Pencil Eraser

Chapter

5

8/48

Pointing Devices

Touch Screen

Touch Sensitive Display

Often Used with Kiosks

Touch Pad

Chapter

5

9/48

Pointing Devices

Pen

Digital / Stylus

Uses Pressure to Write & Draw

As Legal as Ink Signature

Chapter

5

10/48

Pointing Devices

Pen

Handwriting Recognition

Translates Handwritten Characters

Graffiti

Chapter

5

11/48

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

Chapter

5

12/48

Voice

Recognition Challenges

80% Accuracy

ESL Speakers

Women (High-pitched Voices)

People with Accents

Children

Chapter

5

13/48

Controllers

Gaming & Simulation

Gamepad

Joystick

Wheel

Light Gun

Dance Pad

Motion-sensing

Chapter

5

14/48

Smartphone

Navigation Receiver

Keyboard

Microphone

Camera

USB Sync

Chapter

5

15/48

Digital Camera

Resolution

Sharpness & Clarity of Image

Pixel

Single Point in Electronic Image

More Pixels Results in Better Image Quality

Chapter

5

16/48

Music

Record

Compose

Mix

Edit

Chapter

5

17/48

Video

Video CaptureFull-motion Recording into Computer

PC CameraRecord, Edit, & Capture Video

Web CamVideo Camera Output Displayed on Web

Videoconferencing

Whiteboard

Chapter

5

18/48

Scanning

Light-sensing Device

Reads Printed Text & Graphics

Drum

Handheld

Sheet-fed

Flatbed

Chapter

5

19/48

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

Chapter

5

20/48

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

21/48

Scanning

RFIDReads Tag Via Radio Waves

UsesManage Inventory

Toll Payments

Gauge Tire Pressure

Airline Baggage

Magnetic StripeReads Magnetic Stripe on Back of Card

Chapter

5

22/48

Mobile Data Collection

Collect Data Where Transaction OccursCapture Data Directly From SourceData Transfer

Wireless / Docking Station

UsesGrocery Stores

Restaurants

Warehouses

Outdoors

Chapter

5

23/48

Mobile Data Collection

Advantages:

Saves Time

Lowers Labor Cost

Reduces Errors

Eliminates Extra Handling

Available Sooner for Analysis

Chapter

5

24/48

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

Chapter

5

25/48

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

26/48

Physically Challenged

Keyguard

Large Key Keyboards

Head-mounted Pointer

Controls Pointer on Screen

Gesture Recognition

Computerized Implant Devices

Chapter

5

27/48

Output

Data Processed into a Useful Form

AKA Information

Chapter

5

28/48

Display Devices

Monitor Packaged as Separate Component

QualityResolution

Response Time

Brightness

Dot PitchDiagonal Distance Between Pixels

Contrast RatioDifference of Brightest White & Darkest Black

Chapter

5

29/48

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

30/48

Display Devices

Video Card

AKA Graphics Card or Video Adapter

Chapter

5

31/48

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

Chapter

5

32/48

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

Chapter

5

33/48

Printers

Produces Text & Graphics on Paper

Result is Hard Copy

AKA Printout

Orientations

Portrait

Landscape

Portrait Orientation

Portrait Orientation

Landscape Orientation

Landscape Orientation

Chapter

5

34/48

Printers

Resolution

Sharpness & Clarity

Measured by DPI (Dots per Inch)

Speed

Measured by PPM (Pages per Minute)

Chapter

5

35/48

Printers

Non-impactDoesn’t Strike PaperTypes

Ink-jet

Laser

Thermal

Photo

Label

Plotter

Portable

Chapter

5

36/48

Non-impact Printers

Ink-jet

Sprays Tiny Drops of Ink onto Paper

Chapter

5

37/48

Non-impact Printers

Photo

Produces Photo-lab-quality Pictures

Many have Built-in Card Slot

Use Ink-jet Technology

Chapter

5

38/48

Non-impact Printers

LaserHigh-speed, High-quality

DPI ranges from 600 to 2,400 dpi

Chapter

5

39/48

Non-impact Printers

Thermal

Uses Electrically Heated Pins

Heat-sensitive Paper

Thermal Wax-transfer

Dye-sublimation

Chapter

5

40/48

Non-impact Printers

Mobile

Small

Lightweight

Battery-powered

Print from:

Notebook

Smart Phone

Mobile Device

Chapter

5

41/48

Non-impact Printers

LabelUses Adhesive-type MaterialMost Print Bar Codes

PlotterProduces High-quality Drawings

Chapter

5

42/48

Printers

Impact

Mechanism Strikes Inked Ribbon

Ribbon Contacts Paper

Ideal for Multipart Forms

Can Withstand

Dusty Environments

Vibrations

Extreme Temperatures

Chapter

5

43/48

Impact Printers

Dot-matrix

Pins on Print Head Strike Inked Ribbon

Line Printer

High Speed

Chapter

5

44/48

Audio

Produces Music, Speech, & Sounds

Speakers

Subwoofer

Headset

Earbuds

Sound Card

Chapter

5

45/48

Audio

Voice

Computer Talks to You Through Speakers

Internet Telephony

AKA VoIP

Make Voice Calls Using Internet

Comcast

Chapter

5

46/48

Other Output Devices

Multifunction

AKA All-In-One

Provides Functionality of

Printer

Scanner

Copy Machine

Fax Machine

Chapter

5

47/48

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

48/48

Other Output Devices

Physical Challenges

Magnifier

Enlarges Items in Window on Screen

Braille Printer

Windows Settings

Increase Size / Change Color