- use file extension .jpg
- 24-bit format (millions of colours)
- RGB or truecolour - the full colour range through combinations of red, green and blue light on computer monitors
- lossy format, i.e. colour info discarded during compression
- standard JPEGs use Huffman compression table (some tools offer further optimisation of this table)
- variable (user-configurable) compression levels
- can use progressive format for progressive display (in 3, 4 or 5 passes)
Note: progressive JPEGS will be larger
JPEG format is best used for:
JPEG format should not be used for:
- images with solid areas of colour - blotchy, pixelated effects result
