Imagepresentation
- 1. Why Are There So Many Graphic Formats?!?! By Camilla Simson, Joanne Laycock and Richard Finney
- 2. A bitmap image is one which has a spatially mapped array of pixels. This type of format will commonly be used to store digital images. A vector image is one which uses geometrical primitives to represent images. This type of format is the only one used for photographic images. What is the difference between a vector based image and a bitmap image?
- 3. What is the difference between a GIF formatted file and a JPEG? The name JPEG stands for Joint Photographic Experts Group . 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.
- 4. What is the difference between and embedded graphic and a linked graphic in a Word or Powerpoint document? Embedded graphics are graphics present in the document Linked graphics are graphics which are linked to an external source, e.g internet.
- 5. What is a 'colour palette'? 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. 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.
- 6. What is lossless compression? 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. 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.
- 7. What does the FBS skills wiki say about using PNG files? The FBS skills wiki states: “ PNG" or " P ortable N etwork G raphics" file, overcomes many of the problems with GIF and JPG files but it does not support animations.”
- 8. What is BAD about using .bmp format files in your work? Why should you try to avoid this? Large file size Bad for sending and saving Can be countered by using compression algorithms
- 9. What is Flickr? 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. Its popularity has been fueled by its innovative online community tools that allow photos to be tagged and browsed by folksonomic means.