Imagepresentation

608 views

Published on

Published in: Technology, Art & Photos
0 Comments
1 Like
Statistics
Notes
  • Be the first to comment

No Downloads
Views
Total views
608
On SlideShare
0
From Embeds
0
Number of Embeds
29
Actions
Shares
0
Downloads
10
Comments
0
Likes
1
Embeds 0
No embeds

No notes for slide

Imagepresentation

  1. 1. Why Are There So Many Graphic Formats?!?! By Camilla Simson, Joanne Laycock and Richard Finney
  2. 2. <ul><li>A bitmap image is one which has a spatially mapped array of pixels. </li></ul><ul><li>This type of format will commonly be used to store digital images. </li></ul><ul><li>A vector image is one which uses geometrical primitives to represent images. </li></ul><ul><li>This type of format is the only one used for photographic images. </li></ul>What is the difference between a vector based image and a bitmap image?
  3. 3. What is the difference between a GIF formatted file and a JPEG? <ul><li>The name JPEG stands for Joint Photographic Experts Group . </li></ul><ul><li>The JPEG standard specifies both the codec , which defines how an image is compressed into a stream of bytes and decompressed back into an image, and the file format used to contain that stream. </li></ul>
  4. 4. What is the difference between and embedded graphic and a linked graphic in a Word or Powerpoint document? <ul><li>Embedded graphics are graphics present in the document </li></ul><ul><li>Linked graphics are graphics which are linked to an external source, e.g internet. </li></ul>
  5. 5. What is a 'colour palette'? <ul><li>A palette , in computer graphics , is a designated subset of the total range of colors supported by a computer graphics system. Each color in the palette is assigned a number, and for each pixel , one of these numbers is stored. This number determines the color of the pixel. </li></ul><ul><li>Graphics modes with low color depths (generally, from 4 to 8 bits) usually have a modifiable palette, also referred to as pseudocolor palette, that contains indices to the full palette of the display hardware. </li></ul>
  6. 6. What is lossless compression? <ul><li>Lossless data compression is a class of data compression algorithms that allows the exact original data to be reconstructed from the compressed data. This can be contrasted to lossy data compression , which does not allow the exact original data to be reconstructed from the compressed data. </li></ul><ul><li>Lossless data compression is used in many applications. For example, it is used in the popular ZIP file format and in the Unix tool gzip . It is also often used as a component within lossy data compression technologies. </li></ul>
  7. 7. What does the FBS skills wiki say about using PNG files? <ul><li>The FBS skills wiki states: </li></ul><ul><li>“ PNG&quot; or &quot; P ortable N etwork G raphics&quot; file, overcomes many of the problems with GIF and JPG files but it does not support animations.” </li></ul>
  8. 8. What is BAD about using .bmp format files in your work? Why should you try to avoid this? <ul><li>Large file size </li></ul><ul><li>Bad for sending and saving </li></ul><ul><li>Can be countered by using compression algorithms </li></ul>
  9. 9. What is Flickr? <ul><li>Flickr is a photo sharing website and web services suite, and an online community platform, which is generally considered an early example of a Web 2.0 application addition to being a popular Web site for users to share personal photographs, the service is widely used by bloggers as a photo repository. </li></ul><ul><li>Its popularity has been fueled by its innovative online community tools that allow photos to be tagged and browsed by folksonomic means. </li></ul>
  10. 10. References <ul><li>www.wikipedia.org </li></ul><ul><li>https://wiki.leeds.ac.uk/index.php/FBS_Faculty_Skills_Guide </li></ul>

×