Image And Graphic Files on Powerpoint
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Image And Graphic Files on Powerpoint



Annabelle Chambers

Annabelle Chambers
Kate Green
Hannah Pritchard
Laura Lumsden



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Image And Graphic Files on Powerpoint Presentation Transcript

  • 1. Image And Graphic Files Annabelle Chambers Kate Green Hannah Pritchard Laura Lumsden
  • 2. What is the difference between a vector based image and a bitmap (or raster) based image?
    • Bitmap stored as pixels
    • Vectors use mathematical formulas to make shapes.
    • Bitmap eg. JPEG, GIF, TIFF, PNG
    • Vector eg. WMF, EPS, CGM, CDR.
  • 3. What is the difference between a GIF formatted file and a JPEG?
    • JPEG : Images with lots of colour, lossy (some of picture thrown away) method of compression.
    • GIF : Images with fewer colours, lossless method of compression.
    • GIF used for text, logos, lines and buttons.
    • JPEG used for photographs.
  • 4. What is the difference between and embedded graphic (image) and a linked graphic (image) in a Word or Powerpoint document?
    • Main difference is where data is stored: Linked is in a source file. Embedded is part of the actual word document.
    • Embedded is the default.
    • Why is it important?
    • We found out by researching on the net.
  • 5. What is a 'colour pallette'?
    • A block of bytes dividing colours available for use in an indexed colour image.
    • Small Pallette: GIF File
    • Large Pallette: TIFF File
  • 6. What is lossless compression? Do JPEG format files normally use this?
    • Reducing file size with no loss in image quality.
    • JPEG files do not normally use this.
    • This is important to reduce the artefacts in the image.
  • 7. What does the FBS skills wiki say about using PNG files?
    • Portable Network Graphics.
    • A bitmapped image format that employs lossless data compression.
    • Overcomes problems with GIF and JPEG files.
    • It does not support animations.
    • Are there other new formats?: We didn’t find any!
  • 8. What is BAD about using .bmp format files in your work? Why should you try to avoid this?
    • These files don’t support compression = very large files.
    • The files are not supported by web browsers.
    • This should be avoided so that the files are not huge.
  • 9. What is Flickr?
    • Flickr is a photo sharing website and web services suite. Allows photos to be tagged.
    • Recreational: Photo sharing
    • Academic: Bloggers as a photo repository
    • Allows categorizations of photos.