- Multimedia
- essential element or just page enrichment
- contrast between foreground image and background
(color or image)
- flickering or flashing (repeated reading by screen
readers, danger for people affected by photosensitive
epilepsy)
- number of images in a page and image sizes
(acceptable download time, even when using low speed
connection)
- image quality (IPR, watermarking);
- every multimedia component must have a text
equivalent (from a simple description or synthesis, up to
synchronized media equivalents for time-dependent
presentations) depending on the importance of the multimedia
component