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  1. 1. Presentation
  2. 2. Vector and Bitmap Images <ul><li>Vector Images: </li></ul><ul><li>Suitable for logos and line drawings </li></ul><ul><li>Can be rescaled without losing clarity </li></ul><ul><li>Bitmap Images: </li></ul><ul><li>Used for photographic images </li></ul><ul><li>Divides the image into a grid </li></ul><ul><li>The image cannot be easily resized </li></ul>
  3. 3. GIF and JPEG Images <ul><li>GIF: </li></ul><ul><li>Can only contain up to 256 colours </li></ul><ul><li>Good for saving diagrams and basic pictures </li></ul><ul><li>JPEG: </li></ul><ul><li>Used for photo-realistic images </li></ul><ul><li>Information is lost each time it is saved </li></ul>
  4. 4. Imbedded Graphic and Linked Graphics <ul><li>By default graphics are pasted into a word or PowerPoint document by being imbedded </li></ul><ul><li>Imbedded graphics take up more file space than if the image has firstly been compressed and imported </li></ul>
  5. 5. Colour Palettes <ul><li>It’s a is a designated subset of the total range of colours supported by a computer graphics system </li></ul>A 24 bit image An 8 bit image
  6. 6. Lossless Compression <ul><li>A class of data compression algorithms that allows the exact original data to be reconstructed from the compressed data </li></ul><ul><li>Used in ZIP file format </li></ul><ul><li>PNG and GIF use only lossless compression </li></ul>
  7. 7. PNG Files <ul><li>Portable network graphics files that will overcome many of the problems with GIF or JPEG files </li></ul><ul><li>They don’t support animations </li></ul><ul><li>Provides high colour </li></ul>
  8. 8. Using .bmp Format Files in Work <ul><li>The size is large </li></ul><ul><li>Uses up lots of memory </li></ul>
  9. 9. Flickr <ul><li>An online community which acts as a platform for sharing photos </li></ul><ul><li>Members can rate and comment on all photos </li></ul><ul><li>Can be used academically as well as recreationally </li></ul>