image files bmsc1103

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david ashbrook

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image files bmsc1103

  1. 1. Image File Presentation David Ashbrook Jake Cannon Richard Mbasu James Vesty
  2. 2. 1. Vector based images and bitmap (or raster) based images <ul><li>Vector images are mathematically based. </li></ul><ul><li>All lines and shapes of a vector image are independent of one another. </li></ul><ul><li>Vector images are easily scalable due to their use of mathematical formulas </li></ul><ul><li>Bitmap (raster) images are pixel based, meaning that the location and colour information are stored in individual pixels within a grid. </li></ul>
  3. 4. 2. The difference between a GIF formatted file and a JPEG <ul><li>Jpeg ( Joint Photographic experts group) </li></ul><ul><li>Used for compression of photographic images </li></ul><ul><li>Compressed using a string of bites. the stream is contained in file formatting. </li></ul><ul><li>Gif (Graphics interchange format) </li></ul><ul><li>Used 256 different colours </li></ul><ul><li>Used LDV to reduce loss of visual quality </li></ul><ul><li>Unsuitable for photos </li></ul><ul><li>Good for logos and designs. </li></ul>
  4. 5. 3. Embedded graphics and linked graphics in a Word or PowerPoint document <ul><li>Embedded graphics are part of the document and are contained within it </li></ul><ul><li>Linked graphics can be edited in another program and are changed in all documents that link to it </li></ul>
  5. 6. 4. ‘Colour palette' <ul><li>‘ Colour palette' is the set of colours supported by an aplication </li></ul>
  6. 7. 5. Lossless compression <ul><li>Lossless compression allows data to be extracted from its compressed file without loss of quality. Used in Zip and GZIP </li></ul><ul><li>JPEG does not use this, it uses lossy compression. This loses visual quality. </li></ul>
  7. 8. 7. Disadvantages of using .bmp format files in your work <ul><li>The .bmp format losses quality when resizing the image </li></ul><ul><li>This can make the image look unprofessional </li></ul>
  8. 9. 8. Flickr <ul><li>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. </li></ul>

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