CSC1100 - Chapter03 - Input


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CSC1100 - Chapter03 - Input

  1. 1. Chapter 3Input1
  2. 2. 2ObjectivesDefine inputDefine inputDescribe keyboardDescribe keyboardDescribe different mouse typesDescribe different mouse typesExplain how a video input worksExplain how a video input worksDiscuss various scanners and readingdevices and how they workDiscuss various scanners and readingdevices and how they workExplain the types of terminalsExplain the types of terminalsSummarize how various pointingdevices workSummarize how various pointingdevices workExplain how voice recognitionand audio input worksExplain how voice recognitionand audio input worksDescribe various input devicesfor mobile devicesDescribe various input devicesfor mobile devicesExplain the types of terminalsExplain the types of terminalsSummarize the various biometricdevicesSummarize the various biometricdevices
  3. 3. 3Learning OutcomeSuccessful students will be able to:Describe the characteristics of computer hardwaredevices and explain their functionalities.
  4. 4. 4What Is Input?What is input?Input device is any hardware component thatallows users to enter data and instructionsData or instructions entered into memory ofcomputer
  5. 5. 5What Is Input?What are the two types of input?Unprocessed text, numbers, images,audio, and videoInstructionsPrograms – series of instructions,DataPrograms – series of instructions,stored in a file – user canexecute/runCommands – issued by through k/btyping, mouse clicking, screentouching, speaking intomicrophone..User responses – reply to questionsdisplayed by program
  6. 6. 6The KeyboardHow is the keyboard divided?Typing areaNumeric keypadFunction keys, specialkeys that issuecommandscommands
  7. 7. 7
  8. 8. 8The KeyboardWhat is the insertion point?Blinking vertical bar that indicates where nextcharacter you type will displayPointer changeslocation and shapeas you move mouseas you move mouseor other pointingdevice
  9. 9. 9
  10. 10. 10The KeyboardWhat are other types of keyboards?Notebook and manyhandheld computershave built-in keyboardsCordless keyboards communicatewith a receiver attached to a porton the system unit
  11. 11. 11The KeyboardWhat is a cordless keyboard?Communicate with areceiver attached to aport on the systemunit
  12. 12. 12
  13. 13. 13Pointing DevicesWhat is a mouse?Pointing device that fits under palm of handPointing device controlsmovement of pointer, alsocalled mouse pointerMechanical mousemouse buttonswheelbuttonMechanical mousehas rubber or metalball on undersidemouse padball
  14. 14. 14Pointing DevicesWhat is an optical mouse?No moving mechanicalparts insideSenses light to detectmouse’s movementMore precise thanMore precise thanmechanical mouseConnects using acable, or wireless
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  16. 16. 16Right-Right-Triple-Triple-Double-Double-Pointing DevicesWhat are common mouse operations?PointPointClickClickTiltwheelTiltwheelPresswheelbuttonPresswheelbuttonFree-spinwheelFree-spinwheelRight-dragRight-dragRight-clickRight-clickTriple-clickTriple-clickDouble-clickDouble-clickClickClickDragDragRotatewheelRotatewheel
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  18. 18. 18Other Pointing DevicesWhat is a trackball?Stationary pointing devicewith a ball on its top or sideTo move pointer, rotate ballwith thumb, fingers, or palmof handof hand
  19. 19. 19Optical Mousesensor on thebottom of themouse.Apple has transformedits optical mouse intoa modern work of art.
  20. 20. 20Optical MouseOptical mice have several benefits over track-ball mice:No moving parts means less wear and a lower chanceof failure.Theres no way for dirt to get inside the mouse andinterfere with the tracking sensors.Increased tracking resolution means a smootherIncreased tracking resolution means a smootherresponse.They dont require a special surface, such as a mousepad.
  21. 21. 21Other Pointing DevicesWhat are a touchpad and apointing stick?Touchpad is small, flat,rectangular pointing devicesensitive to pressure and motionPointing stick is pointing devicePointing stick is pointing deviceshaped like pencil eraserpositioned between keys onkeyboard
  22. 22. 22Controllers for GamingWhat are the types of game controllers?GamepadJoystickWheelLight gunDance padDance padMotion-sensinggame controller
  23. 23. 23Controllers for GamingWhat are a joystick and a wheel?Joystick is verticallever mountedon a baseWheel issteering-wheel-typesteering-wheel-typeinput devicePedal simulatescar brakes andaccelerator
  24. 24. 24The Nintendo Power Glove usedin virtual reality gamingA dataA datasuit toprovideuserinput
  25. 25. 25Other Pointing DevicesWhat is a light pen?Handheld input devicethat can detect lightPress light pen againstscreen surface and thenpress button on penpress button on pen
  26. 26. 26Other Pointing DevicesWhat is a touch screen?Touch areas of screen withfingerOften used with kiosks
  27. 27. 27Keyboard and Pointing DevicesWhat is a stylus and a digital pen?PDAs &smart phonesuae a stylusTablet PCs use apressure-sensitivedigital pen
  28. 28. 28Keyboard and Pointing DevicesStylus:Looks like a ballpoint pen, but uses pressure to writetext and draw linesDigital pen:Slightly larger than a stylusSlightly larger than a stylusUsed with graphics tablets, flat electronic boardsAvailable in two forms: pressure sensitive & tinybuilt-in digital camera
  29. 29. 29Controllers for Media PlayersWhat is a touch-sensitive pad?Input device on a portablemedia player that enablesusers to scroll throughand play music, viewpictures, watch videos orpictures, watch videos ormovies, adjust volume,and customize settingsClick Wheel
  30. 30. 30Keyboard and Pointing DevicesWhat is a cursor ?Looks similar to a mouseHas a window with cross hairs–So the user can see through to the tablet.What is a digitizer ?What is a digitizer ?Large scale applicationssometimes refer to the graphicstablet as a digitizer.
  31. 31. 31Digitizer
  32. 32. 32Wacom TechnologyWacom Intuos3 LensCursor PointingDeviceCursor
  33. 33. 33Voice InputHow does voice recognition work?Step 2. An analog-to-digital converter (ADC) translatessound waves into digital measurements computer canprocess. Measurements include pitch, volume, silences, andphonemes. Phonemes are sound units such as aw and guh.10010111010110101100001101Step 1. A user dictates text into a microphone.Step 3. Software comparesspoken measurements with thosein its database to find a match orlist of possible matches.MatchesStep 4. To narrow a list down, software presents user witha list of choices or uses a natural language component topredict most likely match. User may correct any selectionmade by software.Natural Language Engine
  34. 34. 34Voice InputWhat is a MIDI (musical instrument digitalinterface)?External device, such as electronic pianokeyboard, to input music and soundeffects
  35. 35. 35PDAs, Tablet PCs, and Smart PhonesHow is a dataentered into aPDA?
  36. 36. 36PDAs, Tablet PCs, and Smart PhonesWhat is a portable keyboardand a docking station?A portable keyboard is a full-sized keyboard youconveniently attach to andremove from PDAremove from PDAA docking station is an externaldevice that holds a mobilecomputer
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  38. 38. 38PDAs, Tablet PCs, and Smart PhonesWhat is a smart phone?Users can input and sendtext messages, graphics,pictures, video clips, andsound filesMany have a built-in orMany have a built-in orattachable camera
  39. 39. 39PDAs, Tablet PCs, and Smart PhonesWhat is a Tablet PC?Mobile computer thatincludes handwritingrecognition softwarePrimary input device is apressure-sensitive digitalpressure-sensitive digitalpen
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  41. 41. 41Digital CamerasWhat is a digital camera?Allows you to takedigital picturesImages viewableimmediately oncameracameraDownload tocomputerPost picturesto Web
  42. 42. 42Digital CamerasHow does a digital camera work?Step 1. Point to the image tophotograph and take picture.Light passes into the lens of thecamera.Step 2. Image is focused on achip called a charge-coupleddevice (CCD).Step 3. CCD generates an analogsignal that represents the image.Step 4. Analog signal is convertedto digital signal by analog-to-digital converter (ADC).Step 5. Digital signal processor(DSP) adjusts quality of image and(DSP) adjusts quality of image andusually stores digital image onminiature mobile storage media inthe camera.Step 6. Images are transferred to acomputer’s hard disk by plugging oneend of the cable into a camera and theother end into a computer; or imagesare copied to hard disk from storagemedia used in the camera.Step 7. Using softwaresupplied with thecamera, images areviewed on screen,incorporated intodocuments, edited, andprinted.
  43. 43. 43Digital CamerasWhat is resolution?Sharpness and clarity of imageThe higher the resolution, the better the imagequality, but the more expensive the cameraPixel (picture element)is single point inis single point inelectronic imageGreater the number ofpixels, the better theimage quality
  44. 44. 44PIXELS
  45. 45. 45PIXELS
  46. 46. 46PIXELS
  47. 47. 47PIXELS
  48. 48. 48PIXELS
  49. 49. 49PIXELS
  50. 50. 50Video InputWhat is video input?Process of entering full-motion imagesinto computerVideo capture card isadapter card that convertsanalog video signal intoanalog video signal intodigital signal thatcomputer can useDigital video (DV)camera records video asdigital signals
  51. 51. 51Video InputWhat are a PC video camera and a Web cam?PC video camerac—DV camera used to capture videoand still images, and to makevideo telephone calls on InternetAlso called PC cameraWeb cam—video cameraWeb camc—c video camerawhose output displays ona Web page
  52. 52. 52Video InputWhat is video conferencing?Whiteboard isanother window onTwo or more geographically separated peoplewho use network or Internet to transmitaudio and video dataanother window onscreen that candisplay notes anddrawingssimultaneously onall participants’screens
  53. 53. 53Scanners and Reading DevicesWhat is a scanner?Light-sensing device thatreads printed text andgraphicsUsed for image processing,converting paper documentsPen orHandheldFlatbedconverting paper documentsinto electronic imagesDrumSheet-fed
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  55. 55. 55Scanners and Reading DevicesHow does a flatbedscanner work?Step 1:Place the document to be scanned face downon the glass window. Using buttons on thescanner or the scanner program, start thescanning process.Step 2:The scanner converts thedocument content to digitalinformation, which is transmittedthrough the cable to thememory of the computer.Step 3: Once in the memory of the computer,users can display the image, print it, e-mail it,include it in a document, or place it on a Webpage.
  56. 56. 56Scanners and Reading DevicesWhat is an optical reader?Optical character recognition (OCR)reads characters inOCR font: OCR-ADevice that uses light source to read characters, marks,and codes and then converts them into digital dataOCR font: OCR-AOptical mark recognition (OMR)reads hand-drawn pencil marks, suchas small circles
  57. 57. 57Optical character recognition (OCR)OCR device determines the shapes of characters bydetecting patterns of light & darkOCR software then compares these shapes withpredefined shapes stored in memory & converts theshapes into characters the computer can processshapes into characters the computer can processOptical mark recognition (OMR)OMR device first scans the answer key sheet torecord correct answers based on patterns of light.Then it scans the remaining documents and matchestheir patterns of light against the answer key sheet.
  58. 58. 58Scanners and Reading DevicesWhat is a turnaround document?Document that youreturn to the companythat sent itPortion you return hasinformation printed ininformation printed inOCR characters
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  60. 60. 60Scanners and Reading DevicesWhat is a bar code reader?Uses laser beams to read bar codes
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  62. 62. 62Scanners and Reading DevicesWhat is a bar code?Identification code that consists of a set of verticallines and spaces of different widthsUniversal Product Code (UPC) bar code – used byretail & grocery storesThe United States Postal Service (USPS) uses aThe United States Postal Service (USPS) uses aPOSTNET bar code
  63. 63. 63Other Input DevicesWhat is an RFID (Radio frequencyidentification) reader?RFID tag:• Size: grain of sand – luggage tag• Contain a memory chip and anantenna in many shapes• Sometimes embedded in glass, labelsor cardsRFID reader• Reads info on the tag via radio waves• Can be handheld devices or mountedin a stationary object such as doorway
  64. 64. 64RFIDDoes not require direct contact or line-of-site transmission –each product has a tag that identifies the product.Can easily calculate the amount due, eliminating the need forchecking out each item.Other uses:track times for runners in a marathon,track times for runners in a marathon,track location of soldiers,airline baggage,gauge pressure & temperature of tires on a vehicle,checking out library books,track payment as vehicles pass through booths on tollway systems.
  65. 65. 65Other Input DevicesWhat is a magnetic stripe card reader (magstripereader)?Reads the magnetic stripeon the back of a credit cardExposure to a magneticfield can erase the contentsof a card’s magnetic stripeof a card’s magnetic stripeStripe divided into threehorizontal tracks, contains infoIn many cases, magstripe reader is part of a point-of-sale terminals
  66. 66. 66What is a magnetic-ink character recognition(MICR) reader?Scanners and Reading DevicesCan read text printed with magnetized inkBanking industry almost exclusively uses MICRfor check processingBank routing num acc num checknumcheckamount
  67. 67. 67Scanners and Reading DevicesWhat is a data collection device?Obtains data directly at location where transactionor event takes place: restaurant, factory,warehouse,… where heat, humidity & cleanlinessare not easy to controlUse PDA, handheld computers,Use PDA, handheld computers,bar code reader, or other mobiledevices to collect data wirelesslyTransmits data over network orInternet - send data wirelessly tocentral office computers
  68. 68. 68TerminalsWhat is a terminal?Consists of a keyboard, a monitor, a video card,and memory.Housed in a single unitThree categories:Dumb terminalsDumb terminalsHas no processing power (host – server/mainframe)Get input, display outputSmart terminalsHas a processorAble to perform certain functions independent from hostcomputer (server)Special purpose terminalsContain features uniquely designed to be use in a particularindustryPOS terminals & automated teller machines
  69. 69. 69TerminalsWhat is a smart display?Battery powered LCD monitor with a touch screen2 roles:LCD monitor while attached to system unitSmart terminal while remotely connected tosystem unitsystem unitWi-Fi (wireless fidelity)- A local area network that useshigh frequency radio signals totransmit and receive data overdistances of a few hundred feet;It was a Microsoft initiative to use aportable touch screen LCD monitor asa smart terminal for PCs, connectingvia Wi-Fi
  70. 70. 70TerminalsWhat is a point of sale (POS) terminal?Records purchases, processes credit or debit cards, andupdates inventorySwipe credit or debit card through card readerReads customer’s personal data from magnetic stripIn a grocery store, POS terminal is a combination of anIn a grocery store, POS terminal is a combination of anelectronic cash register,bar code reader & printerSome POS terminals areWeb-enabled, allowsupdates to inventory atgeographically separatelocations
  71. 71. 71TerminalsWhat is an automated teller machine (ATM)?Self-service bankingmachine that connects to ahost computer through anetwork
  72. 72. 72Biometric InputWhat is biometrics?Authenticates person’s identityby verifying personalcharacteristicFingerprint scanner capturescurves and indentations ofcurves and indentations offingerprintHand geometry system measuresshape and size of person’s hand
  73. 73. 73Biometric InputWhat are examples of biometric technology?Voice verification system compares livespeech with stored voice patternSignature verification system recognizesshape of signatureshape of signatureIris recognition system readspatterns in blood vessels in backof eyeBiometric data is sometimes storedon smart card, which storespersonal data on microprocessorembedded in card
  74. 74. 74Enhanced keyboard or ergonomickeyboardMousePutting It All TogetherWhat are recommended input devices for homeusers?MouseStylus for PDA or smart phoneGame controller(s)30-bit 600 x 1200 ppi color scanner3-megapixel digital cameraHeadphones that include a microphonePC video camera
  75. 75. 75Enhanced keyboard or ergonomickeyboardMousePutting It All TogetherWhat are recommended input devices forsmall office/home office users (SOHO)?MouseStylus and portable keyboard for PDAor smart phone, or digital pen for TabletPC36-bit 600 x 1200 ppi color scanner4-megapixel digital cameraHeadphones that include a microphonePC video camera
  76. 76. 76Wireless mouse for notebook computerTouchpad or pointing stick on notebookcomputerPutting It All TogetherWhat are recommended input devices for mobileusers?computerStylus and portable keyboard for PDA or smartphone, or digital pen for Tablet PC3- or 4-megapixel digital cameraHeadphones that include a microphoneFingerprint scanner for notebook computer
  77. 77. 77Enhanced keyboard or ergonomickeyboardMouseStylus and portable keyboard for PDAPutting It All TogetherWhat are recommended input devices for powerusers?Stylus and portable keyboard for PDAor smart phonePen for graphics tablet48-bit 1200 x 1200 ppi color scanner6- to 12-megapixel digital cameraHeadphones that include a microphonePC video camera
  78. 78. 78Enhanced keyboard or ergonomic keyboardMouseStylus and portable keyboard for PDA or smartphone, or digital pen for Tablet PCTouch screenPutting It All TogetherWhat are recommended input devices for largebusiness users?Touch screenLight pen42-bit 1200 x 1200 ppi color scannerOCR/OMR readers, bar code readers, MICR reader, ordata collection devicesMicrophoneVideo camera for video conferencesFingerprint scanner or other biometric device
  79. 79. 79Input Devices for Physically Challenged UsersWhat input devices are availablefor those with physicallimitations?Keyguard allows users to resthands on keyboard withoutaccidentally pressing keysaccidentally pressing keysHead-mounted pointercontrols pointer on screenNew developments includegesture recognition andcomputerized implant devices
  80. 80. 80Summary of InputKeyboard, mouse, and otherpointing devices; controllers for gamingand media playersKeyboard, mouse, and otherpointing devices; controllers for gamingand media playersVoice inputVoice inputInput devices for PDAs, smart phones,Input devices for PDAs, smart phones,Scanners and reading devicesScanners and reading devicesTerminalsTerminalsInput devices for PDAs, smart phones,and Tablet PCsInput devices for PDAs, smart phones,and Tablet PCsDigital camerasDigital camerasVideo InputVideo InputBiometric inputBiometric inputInput devices for physicallychallenged usersInput devices for physicallychallenged usersChapter 3 Complete