Human-Computer Interaction 3e Dix, Finlay, Abowd, Beale
Using a graphics package such as Adobe Photoshop or Macromedia Fireworks, save different types of image (photographs, line drawings, text) in different formats (GIF, JPEG, PNG). Compare the file sizes of the different formats, experimenting with different compression ratios (where applicable), numbers of colours, etc.
answer
open-ended investigation
Other exercises in this chapter
ex.21.1 (ans), ex.21.2 (ans), ex.21.3 (ans), ex.21.4 (ans)
all exercises for this chapter