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image files bmsc1103



david ashbrook

david ashbrook



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image files bmsc1103 image files bmsc1103 Presentation Transcript

  • Image File Presentation David Ashbrook Jake Cannon Richard Mbasu James Vesty
  • 1. Vector based images and bitmap (or raster) based images
    • Vector images are mathematically based.
    • All lines and shapes of a vector image are independent of one another.
    • Vector images are easily scalable due to their use of mathematical formulas
    • Bitmap (raster) images are pixel based, meaning that the location and colour information are stored in individual pixels within a grid.
  • 2. The difference between a GIF formatted file and a JPEG
    • Jpeg ( Joint Photographic experts group)
    • Used for compression of photographic images
    • Compressed using a string of bites. the stream is contained in file formatting.
    • Gif (Graphics interchange format)
    • Used 256 different colours
    • Used LDV to reduce loss of visual quality
    • Unsuitable for photos
    • Good for logos and designs.
  • 3. Embedded graphics and linked graphics in a Word or PowerPoint document
    • Embedded graphics are part of the document and are contained within it
    • Linked graphics can be edited in another program and are changed in all documents that link to it
  • 4. ‘Colour palette'
    • ‘ Colour palette' is the set of colours supported by an aplication
  • 5. Lossless compression
    • Lossless compression allows data to be extracted from its compressed file without loss of quality. Used in Zip and GZIP
    • JPEG does not use this, it uses lossy compression. This loses visual quality.
  • 7. Disadvantages of using .bmp format files in your work
    • The .bmp format losses quality when resizing the image
    • This can make the image look unprofessional
  • 8. Flickr
    • Flickr is an online photo management and sharing application. People use this resource to share photos with their friends and families or simply to have a good organisation of their pictures.