CSC1100 - Chapter03 - Input
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This document discusses various types of computer input devices. It defines input and describes common input methods like keyboards, mice, touchscreens, scanners, cameras, and biometric devices. It explains how these devices work and are used for tasks like data entry, navigation, document scanning, video/photo capture, and identity verification. The document is intended to help students understand the characteristics and functionalities of basic computer hardware input components.
CSC1100 - Chapter03 - Input
- 2. 2 Objectives Define inputDefine input Describe keyboardDescribe keyboard Describe different mouse typesDescribe different mouse types Explain how a video input worksExplain how a video input works Discuss various scanners and reading devices and how they work Discuss various scanners and reading devices and how they work Explain the types of terminalsExplain the types of terminals Summarize how various pointing devices work Summarize how various pointing devices work Explain how voice recognition and audio input works Explain how voice recognition and audio input works Describe various input devices for mobile devices Describe various input devices for mobile devices Explain the types of terminalsExplain the types of terminals Summarize the various biometric devices Summarize the various biometric devices
- 3. 3 Learning Outcome Successful students will be able to: Describe the characteristics of computer hardware devices and explain their functionalities.
- 4. 4 What Is Input? What is input? Input device is any hardware component that allows users to enter data and instructions Data or instructions entered into memory of computer
- 5. 5 What Is Input? What are the two types of input? Unprocessed text, numbers, images, audio, and video Instructions Programs – series of instructions, Data Programs – series of instructions, stored in a file – user can execute/run Commands – issued by through k/b typing, mouse clicking, screen touching, speaking into microphone.. User responses – reply to questions displayed by program
- 6. 6 The Keyboard How is the keyboard divided? Typing area Numeric keypad Function keys, special keys that issue commandscommands
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- 8. 8 The Keyboard What is the insertion point? Blinking vertical bar that indicates where next character you type will display Pointer changes location and shape as you move mouseas you move mouse or other pointing device
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- 10. 10 The Keyboard What are other types of keyboards? Notebook and many handheld computers have built-in keyboards Cordless keyboards communicate with a receiver attached to a port on the system unit
- 11. 11 The Keyboard What is a cordless keyboard? Communicate with a receiver attached to a port on the system unit
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- 13. 13 Pointing Devices What is a mouse? Pointing device that fits under palm of hand Pointing device controls movement of pointer, also called mouse pointer Mechanical mouse mouse buttons wheel button Mechanical mouse has rubber or metal ball on underside mouse pad ball
- 14. 14 Pointing Devices What is an optical mouse? No moving mechanical parts inside Senses light to detect mouse’s movement More precise thanMore precise than mechanical mouse Connects using a cable, or wireless
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- 16. 16 Right-Right-Triple-Triple-Double-Double- Pointing Devices What are common mouse operations? PointPoint ClickClick Tilt wheel Tilt wheel Press wheel button Press wheel button Free- spin wheel Free- spin wheel Right- drag Right- drag Right- click Right- click Triple- click Triple- click Double- click Double- click ClickClick DragDrag Rotate wheel Rotate wheel
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- 18. 18 Other Pointing Devices What is a trackball? Stationary pointing device with a ball on its top or side To move pointer, rotate ball with thumb, fingers, or palm of handof hand
- 19. 19 Optical Mouse sensor on the bottom of the mouse. Apple has transformed its optical mouse into a modern work of art.
- 20. 20 Optical Mouse Optical mice have several benefits over track-ball mice: No moving parts means less wear and a lower chance of failure. There's no way for dirt to get inside the mouse and interfere with the tracking sensors. Increased tracking resolution means a smootherIncreased tracking resolution means a smoother response. They don't require a special surface, such as a mouse pad.
- 21. 21 Other Pointing Devices What are a touchpad and a pointing stick? Touchpad is small, flat, rectangular pointing device sensitive to pressure and motion Pointing stick is pointing devicePointing stick is pointing device shaped like pencil eraser positioned between keys on keyboard
- 22. 22 Controllers for Gaming What are the types of game controllers? Gamepad Joystick Wheel Light gun Dance padDance pad Motion-sensing game controller
- 23. 23 Controllers for Gaming What are a joystick and a wheel? Joystick is vertical lever mounted on a base Wheel is steering-wheel-typesteering-wheel-type input device Pedal simulates car brakes and accelerator
- 24. 24 The Nintendo Power Glove used in virtual reality gaming A dataA data suit to provide user input
- 25. 25 Other Pointing Devices What is a light pen? Handheld input device that can detect light Press light pen against screen surface and then press button on penpress button on pen
- 26. 26 Other Pointing Devices What is a touch screen? Touch areas of screen with finger Often used with kiosks
- 27. 27 Keyboard and Pointing Devices What is a stylus and a digital pen? PDAs & smart phones uae a stylus Tablet PCs use a pressure-sensitive digital pen
- 28. 28 Keyboard and Pointing Devices Stylus: Looks like a ballpoint pen, but uses pressure to write text and draw lines Digital pen: Slightly larger than a stylusSlightly larger than a stylus Used with graphics tablets, flat electronic boards Available in two forms: pressure sensitive & tiny built-in digital camera
- 29. 29 Controllers for Media Players What is a touch-sensitive pad? Input device on a portable media player that enables users to scroll through and play music, view pictures, watch videos orpictures, watch videos or movies, adjust volume, and customize settings Click Wheel
- 30. 30 Keyboard and Pointing Devices What is a cursor ? Looks similar to a mouse Has a window with cross hairs –So the user can see through to the tablet. What is a digitizer ?What is a digitizer ? Large scale applications sometimes refer to the graphics tablet as a digitizer.
- 31. 31 Digitizer
- 32. 32 Wacom Technology Wacom Intuos3 Lens Cursor Pointing Device Cursor
- 33. 33 Voice Input How does voice recognition work? Step 2. An analog-to-digital converter (ADC) translates sound waves into digital measurements computer can process. Measurements include pitch, volume, silences, and phonemes. Phonemes are sound units such as aw and guh. 10010111010110101100001101 Step 1. A user dictates text into a microphone. Step 3. Software compares spoken measurements with those in its database to find a match or list of possible matches. Matches Step 4. To narrow a list down, 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. Natural Language Engine
- 34. 34 Voice Input What is a MIDI (musical instrument digital interface)? External device, such as electronic piano keyboard, to input music and sound effects
- 35. 35 PDAs, Tablet PCs, and Smart Phones How is a data entered into a PDA?
- 36. 36 PDAs, Tablet PCs, and Smart Phones What is a portable keyboard and a docking station? A portable keyboard is a full- sized keyboard you conveniently attach to and remove from PDAremove from PDA A docking station is an external device that holds a mobile computer
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- 38. 38 PDAs, Tablet PCs, and Smart Phones What is a smart phone? Users can input and send text messages, graphics, pictures, video clips, and sound files Many have a built-in orMany have a built-in or attachable camera
- 39. 39 PDAs, Tablet PCs, and Smart Phones What is a Tablet PC? Mobile computer that includes handwriting recognition software Primary input device is a pressure-sensitive digitalpressure-sensitive digital pen
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- 41. 41 Digital Cameras What is a digital camera? Allows you to take digital pictures Images viewable immediately on cameracamera Download to computer Post pictures to Web
- 42. 42 Digital Cameras How does a digital camera work? Step 1. Point to the image to photograph and take picture. Light passes into the lens of the camera. Step 2. Image is focused on a chip called a charge-coupled device (CCD). Step 3. CCD generates an analog signal that represents the image. Step 4. Analog signal is converted to digital signal by analog-to- digital converter (ADC). Step 5. Digital signal processor (DSP) adjusts quality of image and(DSP) adjusts quality of image and usually stores digital image on miniature mobile storage media in the camera. Step 6. Images are transferred to a computer’s hard disk by plugging one end of the cable into a camera and the other end into a computer; or images are copied to hard disk from storage media used in the camera. Step 7. Using software supplied with the camera, images are viewed on screen, incorporated into documents, edited, and printed.
- 43. 43 Digital Cameras What is resolution? Sharpness and clarity of image The higher the resolution, the better the image quality, but the more expensive the camera Pixel (picture element) is single point inis single point in electronic image Greater the number of pixels, the better the image quality
- 44. 44 PIXELS
- 45. 45 PIXELS
- 46. 46 PIXELS
- 47. 47 PIXELS
- 48. 48 PIXELS
- 49. 49 PIXELS
- 50. 50 Video Input What is video input? Process of entering full-motion images into computer Video capture card is adapter card that converts analog video signal intoanalog video signal into digital signal that computer can use Digital video (DV) camera records video as digital signals
- 51. 51 Video Input What are a PC video camera and a Web cam? PC video camerac—DV camera used to capture video and still images, and to make video telephone calls on Internet Also called PC camera Web cam—video cameraWeb camc—c video camera whose output displays on a Web page
- 52. 52 Video Input What is video conferencing? Whiteboard is another window on Two or more geographically separated people who use network or Internet to transmit audio and video data another window on screen that can display notes and drawings simultaneously on all participants’ screens
- 53. 53 Scanners and Reading Devices What is a scanner? Light-sensing device that reads printed text and graphics Used for image processing, converting paper documents Pen or Handheld Flatbed converting paper documents into electronic images Drum Sheet-fed
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- 55. 55 Scanners and Reading Devices How does a flatbed scanner work? Step 1: Place the document to be scanned face down on the glass window. Using buttons on the scanner or the scanner program, start the scanning process. Step 2: The scanner converts the document content to digital information, which is transmitted through the cable to the memory 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 Web page.
- 56. 56 Scanners and Reading Devices What is an optical reader? Optical character recognition (OCR) reads characters in OCR font: OCR-A Device that uses light source to read characters, marks, and codes and then converts them into digital data OCR font: OCR-A Optical mark recognition (OMR) reads hand-drawn pencil marks, such as small circles
- 57. 57 Optical character recognition (OCR) OCR device determines the shapes of characters by detecting patterns of light & dark OCR software then compares these shapes with predefined shapes stored in memory & converts the shapes into characters the computer can processshapes into characters the computer can process Optical mark recognition (OMR) OMR device first scans the answer key sheet to record correct answers based on patterns of light. Then it scans the remaining documents and matches their patterns of light against the answer key sheet.
- 58. 58 Scanners and Reading Devices What is a turnaround document? Document that you return to the company that sent it Portion you return has information printed ininformation printed in OCR characters
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- 60. 60 Scanners and Reading Devices What is a bar code reader? Uses laser beams to read bar codes
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- 62. 62 Scanners and Reading Devices What is a bar code? Identification code that consists of a set of vertical lines and spaces of different widths Universal Product Code (UPC) bar code – used by retail & grocery stores The United States Postal Service (USPS) uses aThe United States Postal Service (USPS) uses a POSTNET bar code
- 63. 63 Other Input Devices What is an RFID (Radio frequency identification) reader? RFID tag: • Size: grain of sand – luggage tag • Contain a memory chip and an antenna in many shapes • Sometimes embedded in glass, labels or cards RFID reader • Reads info on the tag via radio waves • Can be handheld devices or mounted in a stationary object such as doorway
- 64. 64 RFID Does 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 for checking 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 Other Input Devices What is a magnetic stripe card reader (magstripe reader)? Reads the magnetic stripe on the back of a credit card Exposure to a magnetic field can erase the contents of a card’s magnetic stripeof a card’s magnetic stripe Stripe divided into three horizontal tracks, contains info In many cases, magstripe reader is part of a point-of- sale terminals
- 66. 66 What is a magnetic-ink character recognition (MICR) reader? Scanners and Reading Devices Can read text printed with magnetized ink Banking industry almost exclusively uses MICR for check processing Bank routing num acc num check num check amount
- 67. 67 Scanners and Reading Devices What is a data collection device? Obtains data directly at location where transaction or event takes place: restaurant, factory, warehouse,… where heat, humidity & cleanliness are not easy to control Use PDA, handheld computers,Use PDA, handheld computers, bar code reader, or other mobile devices to collect data wirelessly Transmits data over network or Internet - send data wirelessly to central office computers
- 68. 68 Terminals What is a terminal? Consists of a keyboard, a monitor, a video card, and memory. Housed in a single unit Three categories: Dumb terminalsDumb terminals Has no processing power (host – server/mainframe) Get input, display output Smart terminals Has a processor Able to perform certain functions independent from host computer (server) Special purpose terminals Contain features uniquely designed to be use in a particular industry POS terminals & automated teller machines
- 69. 69 Terminals What is a smart display? Battery powered LCD monitor with a touch screen 2 roles: LCD monitor while attached to system unit Smart terminal while remotely connected to system unitsystem unit Wi-Fi (wireless fidelity) - A local area network that uses high frequency radio signals to transmit and receive data over distances of a few hundred feet; It was a Microsoft initiative to use a portable touch screen LCD monitor as a smart terminal for PCs, connecting via Wi-Fi
- 70. 70 Terminals What is a point of sale (POS) terminal? Records purchases, processes credit or debit cards, and updates inventory Swipe credit or debit card through card reader Reads customer’s personal data from magnetic strip In a grocery store, POS terminal is a combination of anIn a grocery store, POS terminal is a combination of an electronic cash register, bar code reader & printer Some POS terminals are Web-enabled, allows updates to inventory at geographically separate locations
- 71. 71 Terminals What is an automated teller machine (ATM)? Self-service banking machine that connects to a host computer through a network
- 72. 72 Biometric Input What is biometrics? Authenticates person’s identity by verifying personal characteristic Fingerprint scanner captures curves and indentations ofcurves and indentations of fingerprint Hand geometry system measures shape and size of person’s hand
- 73. 73 Biometric Input What are examples of biometric technology? Voice verification system compares live speech with stored voice pattern Signature verification system recognizes shape of signatureshape of signature Iris recognition system reads 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
- 74. 74 Enhanced keyboard or ergonomic keyboard Mouse Putting It All Together What are recommended input devices for home users? Mouse Stylus for PDA or smart phone Game controller(s) 30-bit 600 x 1200 ppi color scanner 3-megapixel digital camera Headphones that include a microphone PC video camera
- 75. 75 Enhanced keyboard or ergonomic keyboard Mouse Putting It All Together What are recommended input devices for small office/home office users (SOHO)? Mouse Stylus and portable keyboard for PDA or smart phone, or digital pen for Tablet PC 36-bit 600 x 1200 ppi color scanner 4-megapixel digital camera Headphones that include a microphone PC video camera
- 76. 76 Wireless mouse for notebook computer Touchpad or pointing stick on notebook computer Putting It All Together What are recommended input devices for mobile users? computer Stylus and portable keyboard for PDA or smart phone, or digital pen for Tablet PC 3- or 4-megapixel digital camera Headphones that include a microphone Fingerprint scanner for notebook computer
- 77. 77 Enhanced keyboard or ergonomic keyboard Mouse Stylus and portable keyboard for PDA Putting It All Together What are recommended input devices for power users? Stylus and portable keyboard for PDA or smart phone Pen for graphics tablet 48-bit 1200 x 1200 ppi color scanner 6- to 12-megapixel digital camera Headphones that include a microphone PC video camera
- 78. 78 Enhanced keyboard or ergonomic keyboard Mouse Stylus and portable keyboard for PDA or smart phone, or digital pen for Tablet PC Touch screen Putting It All Together What are recommended input devices for large business users? Touch screen Light pen 42-bit 1200 x 1200 ppi color scanner OCR/OMR readers, bar code readers, MICR reader, or data collection devices Microphone Video camera for video conferences Fingerprint scanner or other biometric device
- 79. 79 Input Devices for Physically Challenged Users What input devices are available for those with physical limitations? Keyguard allows users to rest hands on keyboard without accidentally pressing keysaccidentally pressing keys Head-mounted pointer controls pointer on screen New developments include gesture recognition and computerized implant devices
- 80. 80 Summary of Input Keyboard, mouse, and other pointing devices; controllers for gaming and media players Keyboard, mouse, and other pointing devices; controllers for gaming and media players Voice inputVoice input Input devices for PDAs, smart phones,Input devices for PDAs, smart phones, Scanners and reading devicesScanners and reading devices TerminalsTerminals Input devices for PDAs, smart phones, and Tablet PCs Input devices for PDAs, smart phones, and Tablet PCs Digital camerasDigital cameras Video InputVideo Input Biometric inputBiometric input Input devices for physically challenged users Input devices for physically challenged users Chapter 3 Complete