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Chapter 5 Input

Chapter 5 Input. Chapter 5 Objectives. Next. Explain how a digital camera works. Define input. Describe uses of PC video cameras, Web cams, and video conferencing. List characteristics of a keyboard. Describe different mouse types and how they work.

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Chapter 5 Input

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  1. Chapter 5Input

  2. Chapter 5 Objectives Next Explain how a digital camera works Define input Describe uses of PC video cameras,Web cams, and video conferencing List characteristics of a keyboard Describe different mouse typesand how they work Discuss various scanners and reading devices and how they work Summarize how pointing devices work Explain the types of terminals and the purpose of their card readers Explain how voice recognition works Summarize the various biometric devices Describe various input devicesfor mobile users Identify alternative input devices for physically challenged users

  3. What Is Input? Next • What isinput? • Data or instructions entered into memory of computer • Input device is any hardware component used to enter data or instructions p. 5.02 and 5.04 Fig. 5-1

  4. What Is Input? Next • What are the two types of input? • Data • Unprocessed text, numbers, images, audio, and video • Instructions • Programs • Commands • User responses p. 5.02 Fig. 5-2

  5. The Keyboard Next • How is the keyboard divided? • Typing area • Numeric keypad • Function keys, special keys that issue commands p. 5.04 Fig. 5-3

  6. The Keyboard MICROSOFT WORD KEY COMBINATION EQUIVALENTS Key Menu | Command Combination Command Button Copy Shift+F2 or Edit | Copy Ctrl+C Open Ctrl+F12 File | Open Paste Ctrl+V Edit | Paste Next • What are alternative forms for commands? • Many programs allow you to use key combination, menu, or button to obtain same result p. 5.05 Fig. 5-4

  7. The Keyboard Next • What are other types of keyboards? • Cordless keyboardis battery-powered and transmits data using wireless technology • Notebook and many handheld computers have built-in keyboards p. 5.06 Fig. 5-6

  8. Mouse mouse buttons wheel button ball mouse pad Next • What is amouse? • Pointing device that fits under palm of hand • Pointing device controls movement of pointer, also called mouse pointer • Mechanical mousehas rubber or metal ball on underside p. 5.07 Fig. 5-8

  9. Mouse Next • What is anoptical mouse? • No moving mechanical parts inside • Senses light to detect mouse’s movement • More precise than mechanical mouse • Connects using a cable, or wireless p. 5.07 Fig. 5-9

  10. Other Pointing Devices Double-click Triple-click Right-click Right-drag Presswheel button Next • What are common mouse operations? Point Click Drag Rotate wheel p. 5.09

  11. Other Pointing Devices Next • What is atrackball? • Stationary pointing device with a ball on its top • To move pointer, rotate ball with thumb, fingers, or palm of hand p. 5.10 Fig. 5-12

  12. Other Pointing Devices Next • What are atouchpadand apointing stick? • Touchpadis small, flat, rectangular pointing device sensitive to pressure and motion • Pointing stickis pointing device shaped like pencil eraser positioned between keys on keyboard p. 5.10 Figs. 5-13—5-14

  13. Other Pointing Devices Next • What is alight pen? • Handheld input device that can detect light • Press light pen against screen surface and then press button on pen p. 5.15 Fig. 5-16

  14. Other Pointing Devices Next • What is atouch screen? • Touch areas of screen with finger • Example ATM machines p. 5.12 Fig. 5-17

  15. Other Pointing Devices artist using pen civil engineer using cursor Next • What is astylus? • Looks like a ballpoint pen, but uses pressure to write text and draw lines • Used withgraphics tablets, flat electronic boards • Electronic signaturec—clegal signature created using special software, stylus, and graphics tablet p. 5.12 Fig. 5-18

  16. Other Pointing Devices Pen for computer monitor Digital pen for Tablet PC Stylus for PDA Next • Where is a stylus used? • Some desktop computers • Many mobile computers and devices • Handwriting recognition software translates handwriting into characters that computer can process p. 5.12 Fig. 5-19

  17. Voice Input Next • What is aMIDI (musical instrument digital interface)? • External device, such as electronic piano keyboard, to input music and sound effects p. 5.15 Fig. 5-21

  18. Input Devices for Mobile Users Next • What is aportable keyboard? • Full-sized keyboard you conveniently attach to and remove from PDA p. 5.17 Fig. 5-23

  19. Input Devices for Mobile Users Next • What is avirtual keyboard? • Projects infrared image of keyboard onto any flat surface http://www.pc-notetaker.com/vkb/?an=google-f p. 5.17 Fig. 5-24

  20. Input Devices for Mobile Users Next • What is adocking station? • External device that holds mobile computer • Provides connections to devices p. 5.18 Fig. 5-25

  21. Digital Cameras Next • What is adigital camera? • Allows you to take digital pictures • Images viewable immediately on camera • Download to computer • Post pictures to Web p. 5.19 Fig. 5-26

  22. Digital Cameras Next • What isresolution? • Sharpness and clarity of image • The higher the resolution, the better the image quality, but the more expensive the camera • Pixel(pictureelement) is single point in electronic image • Greater the number of pixels, the better the image quality p. 5.21 Fig. 5-28

  23. Video Input Next • What isvideo input? • Process of entering full-motion images into computer • Video capture cardis adapter card that converts analog video signal into digital signal that computer can use • Digital video (DV) camerarecords video as digital signals p. 5.22 Fig. 5-29

  24. Video Input Next • What are aPC video cameraand aWeb cam? • PC video camerac—cDV camera used to capture video and still images, and to make video telephone calls on Internet • Also called PC camera • Web camc—video Video camera whose output displays on a Web page webcam example http://cluck.viewnetcam.com:50000/CgiStart?page=Single&Language=0 http://www.earthcam.com/uk/england/london/index.php?cam=1 p. 5.22 Fig. 5-30

  25. Video Input Next • What isvideoconferencing? • Two or more geographically separated people who use network on Internet to transmit audio and video data • Whiteboard is another window on screen that can display notes and drawings simultaneously on all participants’ screens p. 5.23 Fig. 5-31

  26. Scanners and Reading Devices Flatbed Pen or Handheld Sheet-fed Next • What is ascanner? • Light-sensing device that reads printed text and graphics • Used for image processing, converting paper documents into electronic images p. 5.24 Fig. 5-32

  27. Scanners and Reading Devices Next • What is anoptical reader? • Device that uses light source to read characters, marks, and codes and then converts them into digital data • Optical character recognition (OCR)reads characters in OCR font • Optical mark recognition (OMR) reads hand-drawn pencil marks, such as small circles • Bar code scanner p. 5.26 Fig. 5-34

  28. Scanners and Reading Devices Next • What is aturnaround document? • Document that you return to the company that sent it • Portion you return has information printed in OCR characters p. 5.27 Fig. 5-35

  29. Scanners and Reading Devices Next • What is abar code scanner? • Uses laser beams to read bar codes p. 5.27 Fig. 5-36

  30. Scanners and Reading Devices Next • What is abar code? • Identification code that consists of a set of vertical lines and spaces of different widths • UniversalProductCode(UPC) p. 5.27 Fig. 5-37

  31. Scanners and Reading Devices Next What is amagnetic-ink character recognition (MICR) reader? • Can read text printed with magnetized ink • Banking industry almost exclusively uses MICR for check processing p. 5.29 Fig. 5-39

  32. Scanners and Reading Devices Next • What is adata collection device? • Obtains data directly at location where transaction or event takes place • Transmits data over network or Internet p. 5.29 Fig. 5-40

  33. Terminals Next • What is apoint of sale (POS) terminal? • Records purchases, processes credit or debit cards, and updates inventory • Swipe credit or debit card through card readerc—creads customer’s personal data from magnetic strip p. 5.30 Fig. 5-41

  34. Terminals Next • What is anautomatic teller machine (ATM)? • Self-service banking machine that connects to host computer through network p. 5.31 Fig. 5-42

  35. Terminals Next • What is asmart display? • Thin monitor that detaches from computer to function as portable wireless touch screen p. 5.31 Fig. 5-43

  36. Biometric Input Next • What isbiometrics? • Authenticates person’s identity by verifying personal characteristic • Fingerprint scanner captures curves and indentations of fingerprint • Hand geometry system measures shape and size of person’s hand p. 5.32 Fig. 5-45

  37. Biometric Input Next • What are examples of biometric technology? • Voice verification system compares live speech with stored voice pattern • Signature verification system recognizes shape of signature • Iris recognition systemreads patterns in blood vessels in back of eye • Biometric data is sometimes stored on smart card, which stores personal data on microprocessor embedded in card p. 5.33 Figs. 5-46—5-47

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