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Power point graphics_1 Power point graphics_1 Presentation Transcript

  • PowerPoint Presentations:Graphics Basics – Part 1
    Ross Health Sciences
  • Initial Problems
    Most people just place images into PowerPoint® without paying any attention to the image’s type and attributes
    Scanners/cameras may not be set correctly and/or images may not be correctly reformatted prior to use for on-screen viewing
    Screen resolution limits not understood
    2
  • Initial Problems
    May have limited image manipulation knowledge /skills (use of imaging software)
    May not be aware of/use retouching features built into the PowerPoint® program
    May not be willing to take the time to reformat incorrect images in use or willing/able to re-acquire correctly formatted images snowball effect
    3
  • Rules of Thumb
    Use proper image type- to maximize both viewing quality and size compression
    Don’t be leery of image programs- simple steps and processes can yield quick and optimal results- shallow learning curve for most needs
    Know the limits of screen resolution
    4
  • Best Practices
    Acquire images in high-end format to archive for possible uses other than screen (printing)- TIFF
    Copy original to 2nd archive folder for on-screen version and translate for screen-limit resolution- JPEG
    5
  • Best Practices
    Keep original TIFF and JPEG secure and pristine- work with copies only
    Put working copies of JPEG into folders adjacent to associated presentations
    Avoid serial resave of JPEGs- get new copy
    6
  • Best Practices
    GIF
    Text is in Front
    Text is Behind
    PNG
    JPEG
    7
    Use for simple graphics like ClipArt
    Use for the vast majority of photographic media types
    Use only when transparency is essential
  • Common Sources
    Textbook Scans
    Microscope Scans
    Digital Diagnostic Images
    Digital Image Databases
    Digital Camera Photographs
    Web Graphics
    Clip Art
    Personal Art Scans
    Computer Graphic Illustrations
    8
  • Image Dissection
    Right-click over an image in a folder and choose properties and define what is there with the General and Summary Tabs
    9
  • Image Dissection
    10
  • Image Dissection
    11
    1436px/300ppi= 4.79 inches
    1464px/300ppi= 4.88 inches
    Double-click image to bring up Format tab and you will see the actual size (4.88x4.79)
  • Bit Depth
    21= 1 Bit (Black or White pixels ONLY- monochrome)
    28= 8 Bits [256] per color channel (R,G,B)= 24-Bit or 2563= 16.7 million colors; true-color image
    28= 8 Bit (256 shades from BW; grayscale)
    12
  • 9MB TIFF
    13
  • 420KB JPEG or 9MB TIFF
    Which is Which?
    14
    Click Here for Answer
    TIFF
    Image A
    Image B
  • 420KB JPEG
    Enlarged 133%
    Apparent resolution
    2/3s * 150= 100PPI
    15
  • 600KB JPEG or 2.8MB TIFF-
    Which is Which?
    16
    TIFF
    Image A
    Image B
    Click Here for Answer
  • 56KB JPEG or 2.8MB TIFF
    Which is Which?
    17
    Click Here for Answer
    TIFF
    Image A
    Image B
  • 290KB JPEG or 36.7MB TIFF (cropped)
    Which is Which?
    18
    Click Here for Answer
    TIFF
    Image A
    Image B
  • 397KB JPEG (cropped)
    19
    Actual Size 0.62x0.58inches
  • 20
    12x enlarged =
    7.08x7.56inches
    Appearance 100PPI
  • Morale of the Story
    Screen resolution is screen resolution images with higher resolution will not display any better, but will take up much more file space, cause huge presentations, slow everything down and increase failures
    21