This plugin is an example demonstrating the use of the various image_html filters. Each effect is defined by a text file these sections (no individual section is required).
Documents the source of the effect
Each effect will have a head section that contains the HTML to be emitted in the theme head.
Elements from this section will be added to the class element of the tag.
It is also possible to create a extra section for html that will be inserted into the just befor the />. This can be used to insert style="..." or other elements.
Used specially for Effenberger effects, but applicable to similar situations. (...)