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    Digital Digital Presentation Transcript

    • Let’s Get Digital! MLCS Research Methods Terry Butler 2000 February 3
    • Let's get digital: outline
      • digital resources:
        • how to get them; what to do with them
      • desktop publishing and web publishing
      • document conversion
      • lab practice:
      • scanning, digitizing, manipulating
    • What is "digital"
      • Digital means "encoded in numbers"
      • A record is "analog"; a CD is "digital"
      • Digital information can be easily stored, copied, altered, transmitted and combined with other digital material
    • What is "digital" - examples
    • Digital materials - acquiring
      • Analog materials can be "digitized"
      • They are easy to copy and adapt
      • Copyright laws protect the rights of the creator of an image -- so be careful!
    • Digital - Words
      • Text - keyboarding or capture from printed page
      • OCR step 1: make an electronic image
      • OCR step 2: "recognize" letter shapes and words
      • OCR step 3: save text (with formatting) as word processing document
      • common file format: ASCII; ANSI; UNICODE
      • note: word processor formats are not standard!
    • Digital Pictures - Photos
      • photo is scanned (converted to digital form)
      • graphics software program can alter and control image as it is saved as a graphic file
      • common file formats: GIF; JPEG; TIFF
    • Digital Sounds
      • sound is converted to digital form as it is played (or it can be "live" recording with a mike)
      • more difficult to manipulate than text or pictures
      • standard formats: MIDI (music); AIFF, WAV; RA (RealAudio)’ MP3
    • Digital Video
      • special equipment to capture - sound and pictures
      • formats: QT4 (QuickTime 4); MPG; RV (Real Video); AVI
    • Web Publishing
      • information is encoded in HTML and "published" (made public)
      • before - type in HTML; now - convert document to HTML (wysiwyg)
    • Document Conversion
      • how is text stored in a computer system?
      • operating system differences (PC vs Mac)
      • word processing file formats
      • conversions done by the operating system
      • document conversion software:
        • examples: Word for Word; MacLink Plus
    • Encoding - file formats
      • standard numeric codes: "c" = 99 = 63 hex
      • ASCII - 128 codes; upper ASCII - 256 codes
      • ANSI - better standards for codes above 128
      • UNICODE - all the world's characters
    • Word processing file formats
      • Commercial file formats are not standard and are purposely kept changing
      • Conversion from one to another is usually less than perfect
    • Document conversions
      • Macintosh computers can open PC files (but not vice versa )
      • Conversion programs take the file to a "common denominator" then to the target format
      • Most of the conversion programs run on Macintosh:
        • MacLink; Word for Word
    • Computer Lab - Let’s get digital!
      • Scanning text - using a flatbed scanner, scan in and interpret one or two pages of text (using OCR software)
      • Scanning images - using a flatbed scanner, scan in a colour picture
      • Digitizing sound - digitizing using a sound card will be demonstrated
    • Computer Lab - (continued)
      • Document conversion - a word processing file will be converted from Macintosh to PC (or the reverse) and tested on the target system
      • Manipulating text, images, and sound files - students will work with the resulting text, image, and sound files