Obvioiusly, Blind people can not see images. Therefore, there must be some sort of alternative. This can take the form of several methods.
- Using alt attributes on img elements.
- Using alt attributes on images used as submit buttons.
- Using the HTML BUTTON
- Providing text alternatives for the area elements of image maps.
- Using LONGDESC to describe complicated images like a chart
- Using a TABLE to Create ALT text for a Complex Graph
- Providing link text that describes the purpose of an image link.
- Creating text alternatives for applets using the OBJECT tag.
- Providing text alternatives on applet elements.
- Creating text alternatives for EMBED using the NOEMBED tag.
- Providing text alternatives for ASCII art, emoticons, and leetspeak.
- Using HTML5 CANVAS
- Using CSS Background Images
- WCAG 2.0 SC 1.1.1 Non-text Content: All non-text content that is presented to the user has a text alternative that serves the equivalent purpose. (Level A)