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Computers9 Ch5
Computers9 Ch5
Computers9 Ch5
Computers9 Ch5
Computers9 Ch5
Computers9 Ch5
Computers9 Ch5
Computers9 Ch5
Computers9 Ch5
Computers9 Ch5
Computers9 Ch5
Computers9 Ch5
Computers9 Ch5
Computers9 Ch5
Computers9 Ch5
Computers9 Ch5
Computers9 Ch5
Computers9 Ch5
Computers9 Ch5
Computers9 Ch5
Computers9 Ch5
Computers9 Ch5
Computers9 Ch5
Computers9 Ch5
Computers9 Ch5
Computers9 Ch5
Computers9 Ch5
Computers9 Ch5
Computers9 Ch5
Computers9 Ch5
Computers9 Ch5
Computers9 Ch5
Computers9 Ch5
Computers9 Ch5
Computers9 Ch5
Computers9 Ch5
Computers9 Ch5
Computers9 Ch5
Computers9 Ch5
Computers9 Ch5
Computers9 Ch5
Computers9 Ch5
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Computers9 Ch5

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  • 1. Chapter 5 B.M.H Input and Output
  • 2. Learning Objectives <ul><li>Keyboard </li></ul><ul><li>Pointing Devices </li></ul><ul><ul><li>Mouse, Trackball, Touchpad, Pointing stick </li></ul></ul><ul><ul><li>Joystick, Graphics tablet, Touch screens </li></ul></ul><ul><ul><li>Pen-based computing </li></ul></ul><ul><li>Source Data Automation </li></ul><ul><ul><li>Magnetic-ink character recognition </li></ul></ul><ul><ul><li>Optical recognition devices </li></ul></ul><ul><ul><li>Voice output </li></ul></ul>MIU
  • 3. Computer system MIU Input Processing Output Secondary Storage
  • 4. Input <ul><li>Input data </li></ul><ul><ul><li>Go directly to the computer for processing </li></ul></ul><ul><ul><ul><li>Bar codes , </li></ul></ul></ul><ul><ul><ul><li>Speech through a microphone </li></ul></ul></ul><ul><ul><ul><li>Data by means of a device that converts motions to on-screen action </li></ul></ul></ul><ul><ul><li>Go through intermediate handling </li></ul></ul><ul><ul><ul><li>Copied from a source document and translated to a Magnetic disk </li></ul></ul></ul><ul><ul><ul><li>Called rawdata. </li></ul></ul></ul>MIU
  • 5. Conventional input devices <ul><li>Keyboard </li></ul><ul><li>Pointing devices </li></ul>MIU
  • 6. Keyboard <ul><li>Part of a PC or a terminal </li></ul><ul><ul><li>A traditional keyboard </li></ul></ul><ul><ul><li>A keyboard of supermarket or fast-food franchise </li></ul></ul><ul><ul><ul><li>Its keys represent items such as large fries or a Big Mac. </li></ul></ul></ul><ul><ul><li>A keyboard to enter other language characters such as a Chinese characters. </li></ul></ul>MIU
  • 7. Pointing devices <ul><li>Used to position a pointer on the screen </li></ul><ul><ul><li>Pointer </li></ul></ul><ul><ul><ul><li>Has a number of shapes but most is often an arrow </li></ul></ul></ul><ul><li>Has one or more buttons </li></ul><ul><ul><li>To set the insertion point or cursor </li></ul></ul><ul><ul><li>To communicate commands to the OS or </li></ul></ul><ul><ul><li>an application program by clicking a button </li></ul></ul><ul><ul><ul><li>Often used to click on an icon in GUI </li></ul></ul></ul><ul><ul><li> Icon </li></ul></ul><ul><ul><ul><li>A pictorial symbol on a screen </li></ul></ul></ul><ul><ul><ul><li>Represents a computer activity (a command to the computer) </li></ul></ul></ul><ul><ul><li> GUI (graphical user interface) </li></ul></ul><ul><ul><ul><li>The environment that permits communication with the computer clicking on icons </li></ul></ul></ul>MIU
  • 8. Pointing devices <ul><li>Types </li></ul><ul><ul><li>Mouse </li></ul></ul><ul><ul><li>Trackball </li></ul></ul><ul><ul><li>Touchpad </li></ul></ul><ul><ul><li>Pointing stick </li></ul></ul><ul><ul><li>Joystick </li></ul></ul><ul><ul><li>Graphics tablet </li></ul></ul><ul><ul><li>Touch screens </li></ul></ul><ul><ul><li>Pen-based computing </li></ul></ul>MIU
  • 9. Mouse <ul><li>The most common pointing device for PCs </li></ul><ul><li>Types </li></ul><ul><ul><li>Mechanical mouse </li></ul></ul><ul><ul><ul><li>Uses a small ball on its underside </li></ul></ul></ul><ul><ul><ul><ul><li>Sensors inside the mouse determine the direction and distance of movement </li></ul></ul></ul></ul><ul><ul><li>Optical mouse </li></ul></ul><ul><ul><ul><li>Uses a light beam to monitor mouse movement </li></ul></ul></ul><ul><ul><li> Wireless mouse </li></ul></ul><ul><ul><ul><li>Communicate through an infrared beam without cable </li></ul></ul></ul><ul><ul><li> Wheel mouse </li></ul></ul><ul><ul><ul><li>Has an extra wheel that can be clicked like a button or rolled to affect the cursor </li></ul></ul></ul>MIU
  • 10. MIU
  • 11. MIU
  • 12. Trackball <ul><li>A variation on the mechanical mouse </li></ul><ul><ul><li>Roll the ball directly with your hand </li></ul></ul><ul><ul><li>Used to play a video game </li></ul></ul>MIU
  • 13. MIU
  • 14. Touchpad <ul><li>A rectangular pressure-sensitive pad </li></ul><ul><ul><li>Slide a finger across the surface </li></ul></ul><ul><li>Buttons at the bottom of the unit </li></ul><ul><ul><li>The same functions as mouse buttons </li></ul></ul><ul><li>Recognize a finger tap as a click </li></ul>MIU
  • 15. MIU
  • 16. MIU
  • 17. Pointing stick <ul><li>A small pressure-sensitive post </li></ul><ul><ul><li>mounted in the center of the keyboard between the G and H keys </li></ul></ul><ul><li>Pushing the post in one direction </li></ul><ul><ul><li>Causes it to move in that direction </li></ul></ul>MIU
  • 18. MIU
  • 19. Joystick <ul><li>A short lever with a handgrip </li></ul><ul><li>The distance and speed of movement </li></ul><ul><ul><li>Control the screen pointer ’ s position </li></ul></ul><ul><li>Most often used with games </li></ul><ul><ul><li>such as flight simulators </li></ul></ul>MIU
  • 20. MIU
  • 21. Graphics tablet <ul><li>Called a digitizing tablet </li></ul><ul><li>A rectangular board with an invisible grid of electronic dots </li></ul><ul><ul><li>used a pen-like stylus or a mouse-like puck </li></ul></ul>MIU
  • 22. MIU
  • 23. Touch screens <ul><li>One way of getting input directly from the source </li></ul><ul><li>Point to a selection </li></ul>MIU
  • 24. MIU
  • 25. Pen-based computing <ul><li>Use an electronic pen, or stylus to input data </li></ul><ul><ul><li>Used as a pointer on the screen </li></ul></ul><ul><ul><li>Used to input data in handwritten form </li></ul></ul>MIU
  • 26. MIU
  • 27. Source Data Automation <ul><li>The use of special equipment to collect data at the source (efficient data input) </li></ul><ul><ul><li>Send it directly to the computer </li></ul></ul><ul><ul><li>- supermarket bar code eliminates keying </li></ul></ul><ul><ul><li>Reduce the number of intermediate steps </li></ul></ul><ul><ul><li>-&gt; Reduce costs and opportunities for human mistakes. </li></ul></ul><ul><li>The primary areas </li></ul><ul><ul><li>Magnetic-ink character recognition </li></ul></ul><ul><ul><li>Optical Scanners </li></ul></ul><ul><ul><li>Other optical recognition devices </li></ul></ul><ul><ul><li>Voice, finger or eye </li></ul></ul>MIU
  • 28. MICR <ul><li>: M agnetic- I nk C haracter R ecognition </li></ul><ul><li>Involves using a machine to read character made of magnetized particles </li></ul><ul><li>Ex. Banking industry </li></ul><ul><ul><li>the numbers encoded across the bottom of personal check </li></ul></ul><ul><ul><li>These numbers should correspond to the amount of the check. </li></ul></ul>MIU
  • 29. MIU
  • 30. Optical Scanner <ul><li>Convert text or even a drawing or picture into computer-recognizable data </li></ul><ul><ul><li>by using a form of optical recognition </li></ul></ul><ul><li>Optical recognition system </li></ul><ul><ul><li>Use a light beam to scan input data and convert it into electrical signals </li></ul></ul><ul><li>Categories </li></ul><ul><ul><li>Flatbed scanner </li></ul></ul><ul><ul><li>Sheet-feed scanner </li></ul></ul><ul><ul><li>Handheld scanner </li></ul></ul>MIU
  • 31. MIU Flatbed scanner Sheetfed scanner handheld scanner
  • 32. More optical recognition methods <ul><li>O ptical M ark R ecognition (OMR) </li></ul><ul><li>O ptical C haracter R ecognition (OCR) </li></ul><ul><li>Bar codes </li></ul><ul><li>Handwritten characters </li></ul>MIU
  • 33. OMR <ul><li>Called Mark sensing </li></ul><ul><ul><li>A machine senses marks on a piece of paper </li></ul></ul><ul><ul><li>Ex. Test ’ s answer sheet </li></ul></ul>MIU Exam 1. O O O O 2. O O O O 3. O O O O 4. O O O O 5. O O O O a b c d
  • 34. OCR <ul><li>Use a light source to read special characters and convert them into electrical signals </li></ul><ul><li>OCR-A </li></ul><ul><ul><li>A standard typeface for optical character </li></ul></ul><ul><ul><li>Established by the ANSI </li></ul></ul><ul><ul><li>Can be read by both humans and machines </li></ul></ul>MIU
  • 35. Bar code <ul><li>The code number represented on the product label by a pattern of vertical marks, or bars </li></ul><ul><li>Barcode reader </li></ul><ul><ul><li>sense and read these stripes </li></ul></ul><ul><ul><li>A photoelectric device that reads the code by mean of reflected light </li></ul></ul>MIU
  • 36. MIU
  • 37. MIU
  • 38. Handwritten characters <ul><li>Machines that can read handwritten characters </li></ul><ul><ul><li>make handwritten data immediately usable for processing </li></ul></ul><ul><ul><li>Legibility of the handwriting are rigid </li></ul></ul>MIU
  • 39. MIU
  • 40. Voice input <ul><li>Speaking to a computer </li></ul><ul><li>Called speech recognition </li></ul><ul><li>Speech recognition devices </li></ul><ul><ul><li>Accept the spoken word through a microphone and convert it into binary code(0s and 1s) </li></ul></ul><ul><ul><li>The disabled,those with “ busy hands ” ,hands too dirty for the keyboard are using. </li></ul></ul>MIU
  • 41. MIU
  • 42. Digital Cameras <ul><li>Takes photos that it stores internally on a chip </li></ul><ul><ul><li>No film </li></ul></ul><ul><ul><li>Photos sent by cable directly to a computer </li></ul></ul>MIU

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