Image And Graphic Files
- 1. Image and Graphic Files Chris Bath Sally Joseph Mike Tempest Jackie Webster
- 2. Vector or Bitmap? Vector – These are used for illustration with precise measurements, as such can be scaled accurately. Due to this however, it is not accurate for photos. Bitmap – These, in contrast, are more suitable for photographic images. They are less easily manipulated, as the edges would be appear jagged.
- 3. JPEG vs GIF JPEG are suitable for web design featuring photographs as it supports 16million colours. GIF files support 256 colours, as such are useful for pictures. They can also support transparency, so the image appears borderless. JPEG GIF
- 4. Colour Palette The basic set of colours is called a system palette. Colors : aqua, black, blue, gray, fuchsia, green, lime, maroon, navy, olive, purple, red, silver, teal, white, yellow. These colors were picked as being the standard 16 colors supported with the Windows VGA palette.
- 5. Lossless Compression Refers to data compression techniques in which no data is lost. Space required for the file can be reduced by this technique. Only certain files can use this technique: e.g. graphics, audio, and video This technique is useful, as the information being discarded is often unnoticeable to the human eye. JPG files use this.
- 6. BMP. Files are BAD! The BMP. Files are lossless. These are unable to store animation, and cannot be used on the web. These files cannot be viewed, and therefore is unsuitable for work.