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Input Presentation Transcript

  • 1. Discovering Computers 2011 Living in a Digital World
  • 2. Objectives Overview Identify the keys and buttons commonly found on desktop Define input and differentiate computer keyboards, and Describe different mouse typesamong a program, command, and describe how keyboards for and explain how to use a mouse user response mobile computers and devices differ from desktop computer keyboards Describe various types of touch Describe various types of pen Summarize the purpose of variousscreens and explain how a touch- input, and identify other types of game controllers sensitive pad works input for smart phonesSee Page 257 Discovering Computers 2011: Living in a Digital World 2for Detailed Objectives Chapter 5
  • 3. Objectives OverviewExplain how resolution Describe the uses of Discuss how variousaffects the quality of a voice recognition, scanners and reading picture captured on a Web cams, and video devices work digital camera conferencing Discuss how POS Identify alternativeSummarize the various terminals, automated input devices for biometric devices teller machines, and physically challenged DVD kiosks work usersSee Page 257 Discovering Computers 2011: Living in a Digital World 3for Detailed Objectives Chapter 5
  • 4. What Is Input?• Input is any data and instructions entered into the memory of a computerPages 258 – 259 Discovering Computers 2011: Living in a Digital World 4Figure 5-1 Chapter 5
  • 5. What Is Input?• Instructions can be entered into the computer in the form of programs, commands, and user responses A program is a series of related instructions that tells a computer what tasks to perform and how to perform them Programs respond to commands that a user issues A user response is an instruction a user issues by replying to a question displayed by a programPages 258 - 259 Discovering Computers 2011: Living in a Digital World 5 Chapter 5
  • 6. What Are Input Devices An input device is any hardware component that allows users to enter data and instructions into a computerPage 260 Discovering Computers 2011: Living in a Digital World 6 Chapter 5
  • 7. The Keyboard• A keyboard is an input device that contains keys users press to enter data and instructions into a computerPage 260 Discovering Computers 2011: Living in a Digital World 7Figure 5-2 Chapter 5
  • 8. The Keyboard• Most desktop computer keyboards have…Pages 260 - 261 Discovering Computers 2011: Living in a Digital World 8 Chapter 5
  • 9. The Keyboard• The insertion point, also known as the cursor, is a symbol on the screen that indicates where the next character you type will appearPage 261 Discovering Computers 2011: Living in a Digital World 9Figure 5-3 Chapter 5
  • 10. The Keyboard Wired Wireless Keyboards Keyboards USB port Bluetooth IrDAPage 262 Discovering Computers 2011: Living in a Digital World 10 Chapter 5
  • 11. The Keyboard• An ergonomic keyboard has a design that reduces the chance of wrist and hand injuries• Ergonomics incorporates comfort, efficiency, and safety into the design of the workplace Click to view Web Link, click Chapter 5, Click Web Link from left navigation, then click Ergonomics below Chapter 5Page 262 Discovering Computers 2011: Living in a Digital World 11Figure 5-4 Chapter 5
  • 12. The Keyboard• Keyboards on mobile devices typically are smaller and/or have fewer keys• Some phones have predictive text input, which saves time when entering text using the phone’s keypadPages 262 – 263 Discovering Computers 2011: Living in a Digital World 12Figure 5-5 Chapter 5
  • 13. Pointing DevicesPage 263 Discovering Computers 2011: Living in a Digital World 13 Chapter 5
  • 14. Mouse• A mouse is a pointing device that fits under the palm of your hand comfortably – Most widely used pointing device on desktop computers• A mouse can be wired or wirelessPages 263 – 264 Discovering Computers 2011: Living in a Digital World 14Figures 5-6 and 5-7 Chapter 5
  • 15. Mouse• Mouse operations Point Click Right-click Double-click Rotate Triple-click Drag Right-drag wheel Free-spin Press thumb Press wheel Tilt wheel wheel buttonPage 264 Discovering Computers 2011: Living in a Digital World 15Figure 5-8 Chapter 5
  • 16. Other Pointing DevicesTrackball Touchpad Pointing Stick • A trackball is a • A touchpad is • A pointing stationary a small, flat, stick is a pointing rectangular pressure- device with a pointing sensitive ball on its top device that is pointing or side sensitive to device shaped pressure and like a pencil motion eraser that is positioned between keys on a keyboardPages 265 – 266 Discovering Computers 2011: Living in a Digital World 16Figures 5-9 – 5-11 Chapter 5
  • 17. Touch Screens and Touch-Sensitive Pads• A touch screen is a touch-sensitive display device Click to view Web Link, click Chapter 5, Click Web Link from left navigation, then click Multi-Touch Screens below Chapter 5Page 266 Discovering Computers 2011: Living in a Digital World 17Figures 5-12 – 5-13 Chapter 5
  • 18. Touch Screens and Touch-Sensitive Pads Microsoft Surface Touch-sensitive padsPage 267 Discovering Computers 2011: Living in a Digital World 18Figures 5-14 – 5-15 Chapter 5
  • 19. Pen Input• With pen input, you touch a stylus or digital pen on a flat surface to write, draw, or make selections Click to view Web Link, click Chapter 5, Click Web Link from left navigation, then click Signature Capture Pads below Chapter 5Page 268 Discovering Computers 2011: Living in a Digital World 19Figure 5-16 Chapter 5
  • 20. Other Input for Smart PhonesPage 269 Discovering Computers 2011: Living in a Digital World 20Figures 5-17 – 5-18 Chapter 5
  • 21. Game Controllers• Video games and computer games use a game controller as the input device that directs movements and actions of on-screen objects Joysticks and Gamepads Light guns Wheels Motion- Dance pads sensing Click to view Web Link, click Chapter 5, Click Web Link from left navigation, controllers then click Game Controllers below Chapter 5Pages 270 - 271 Discovering Computers 2011: Living in a Digital World 21 Chapter 5
  • 22. Game ControllersPage 270 Discovering Computers 2011: Living in a Digital World 22Figure 5-19 Chapter 5
  • 23. Digital Cameras• A digital camera is a mobile device that allows users to take pictures and store them digitally Studio cameras Field cameras Point-and-shoot cameraPage 272 Discovering Computers 2011: Living in a Digital World 23 Chapter 5
  • 24. Digital CamerasPage 272 Discovering Computers 2011: Living in a Digital World 24Figure 5-20 Chapter 5
  • 25. Digital Cameras• Two factors affect the quality of digital camera photos: • Resolution is the number of horizontal and vertical pictures in a display device Resolution • A pixel is the smallest element in an electronic display Number of bits • Each pixel consists of one or more bits of data stored in each • The more bits used to represent a pixel, the more colors and shades of gray that pixel can be representedPage 273 Discovering Computers 2011: Living in a Digital World 25 Chapter 5
  • 26. Voice Input • Voice input is the process of entering input by speaking into a microphone • Voice recognition is the computer’s capability of distinguishing spoken wordsPage 274 Discovering Computers 2011: Living in a Digital World 26Figure 5-22 Chapter 5
  • 27. Voice Input• Audio input is the process of entering any sound into the computer Speech Music Sound EffectsPage 274 Discovering Computers 2011: Living in a Digital World 27 Chapter 5
  • 28. Voice Input• Music production software allows users to record, compose, mix, and edit music and soundsPage 274 Discovering Computers 2011: Living in a Digital World 28Figure 5-23 Chapter 5
  • 29. Video Input• Video input is the process of capturing full-motion images and storing them on a computer’s storage medium Record video on a digital video (DV) camera or use a video capture card to convert analog signals to digital Connect the camera to a port on the system unit Transfer video and imagesPage 275 Discovering Computers 2011: Living in a Digital World 29 Chapter 5
  • 30. Video InputPage 275 Discovering Computers 2011: Living in a Digital World 30Figure 5-24 Chapter 5
  • 31. Video Input• A Web cam is a type of digital video camera that enables a user to: Send e-mail Capture video and Add live images to messages with still images instant messages video attachments Broadcast live Make video images over the telephone calls Click to view Web Link, Internet click Chapter 5, Click Web Link from left navigation, then click Web Cams below Chapter 5Pages 275 - 276 Discovering Computers 2011: Living in a Digital World 31 Chapter 5
  • 32. Video Input• A video conference is a meeting between two or more geographically separated peoplePages 276 – 277 Discovering Computers 2011: Living in a Digital World 32Figures 5-25 – 5-26 Chapter 5
  • 33. Scanners and Reading Devices Flatbed Pen or Handheld Sheet-fed DrumPage 277 Discovering Computers 2011: Living in a Digital World 33Figure 5-27 Chapter 5
  • 34. Scanners and Reading DevicesPage 278 Discovering Computers 2011: Living in a Digital World 34Figure 5-28 Chapter 5
  • 35. Scanners and Reading Devices• Optical character recognition (OCR) involves reading characters from ordinary documents• A turnaround document is a document you return to the company that creates and sends itPage 279 Discovering Computers 2011: Living in a Digital World 35Figures 5-29 – 5-30 Chapter 5
  • 36. Scanners and Reading Devices • Optical mark recognition (OMR) reads hand-drawn marks such as small circles or rectangles • An OMR device scans the documents and matches the patterns of lightPage 279 Discovering Computers 2011: Living in a Digital World 36Figure 5-31 Chapter 5
  • 37. Scanners and Reading Devices • A bar code reader, also called a bar code scanner uses laser beams to read bar codes Click to view Web Link, click Chapter 5, Click Web Link from left navigation, then click Bar Code Readers below Chapter 5Page 280 Discovering Computers 2011: Living in a Digital World 37Figure 5-32 Chapter 5
  • 38. Scanners and Reading Devices• RFID (radio frequency identification) uses radio signals to communicate with a tag placed in or attached to an object• An RFID reader reads information on the tag via radio waves• RFID can track:Tracking times of Tracking location Employee Checking lift runners in a Airline baggage of soldiers wardrobes tickets of skiers marathon Gauging pressure Managing Checking out Tracking toll and temperature inventory library books payments of tiresPage 280 Discovering Computers 2011: Living in a Digital World 38 Chapter 5
  • 39. Scanners and Reading Devices• Magnetic stripe card readers read the magnetic stripe on the back of cards such as: Credit cards Entertainment cards Bank cards Other similar cardsPage 281 Discovering Computers 2011: Living in a Digital World 39Figure 5-34 Chapter 5
  • 40. Scanners and Reading Devices• MICR (magnetic ink character recognition) devices read text printed with magnetized ink• An MICR reader converts MICR characters into a form the computer can process• Banking industry uses MICR for check processingPage 281 Discovering Computers 2011: Living in a Digital World 40Figure 5-35 Chapter 5
  • 41. Scanners and Reading Devices • Data collection devices obtain data directly at the location where the transaction or event takes place • Used in: – Restaurants – Grocery stores – Factories – Warehouses – The outdoorsPage 282 Discovering Computers 2011: Living in a Digital World 41Figure 5-36 Chapter 5
  • 42. Biometric Input• Biometrics authenticates a person’s identity by verifying a personal characteristic Face Hand Fingerprint recognition geometry reader system system Voice Signature Iris recognition verification verification system system system Retinal scannersPages 282 - 283 Discovering Computers 2011: Living in a Digital World 42 Chapter 5
  • 43. Biometric Input hand geometry system iris recognition system fingerprint Click to view Web Link, reader click Chapter 5, Click Web Link from left navigation, then click Biometric Input below Chapter 5Pages 282 – 283 Discovering Computers 2011: Living in a Digital World 43Figures 5-37 – 5-39 Chapter 5
  • 44. Terminals• A terminal is a computer that allows users to send data to and/or receive information from a host computer A POS terminal An automated A DVD kiosk is a records purchases, teller machine self-service DVD processes (ATM) allows users rental machine payment, and to access their updates inventory bank accountsPages 284 – 285 Discovering Computers 2011: Living in a Digital World 44Figures 5-40 – 5-42 Chapter 5
  • 45. Putting It All TogetherPage 285 Discovering Computers 2011: Living in a Digital World 45Figure 5-43 Chapter 5
  • 46. Putting It All TogetherPage 285 Discovering Computers 2011: Living in a Digital World 46Figure 5-43 Chapter 5
  • 47. Putting It All TogetherPage 285 Discovering Computers 2011: Living in a Digital World 47Figure 5-43 Chapter 5
  • 48. Input Devices for Physically Challenged Users• Several input devices are available to assist physically challenged users: Keyboards On-screen Keyguard with larger keyboard keys Various Head- Gesture pointing mounted recognition devices pointer Computerized Click to view Web Link, click Chapter 5, Click Web implant Link from left navigation, then click Gesture Recognition devices below Chapter 5Page 286 Discovering Computers 2011: Living in a Digital World 48 Chapter 5
  • 49. Input Devices for Physically Challenged Users Keyboard with larger keys Head-mounted pointerPage 286 Discovering Computers 2011: Living in a Digital World 49Figures 5-44 – 5-45 Chapter 5
  • 50. Summary Various techniques of entering Several commonly used input input devices Keyboard, mouse, and other pointing devices; touch screens, pen input, other input for smart Input devices for physically phones, game controllers, digital challenged users cameras, voice input, video input, scanners and reading devices, biometric input, and terminalsPage 287 Discovering Computers 2011: Living in a Digital World 50 Chapter 5
  • 51. Discovering Computers 2011 Living in a Digital World Chapter 5 Complete