On Sat Oct 1 2011 joakim@verona.se wrote:
> Do you have a recipe to create and verify such a highlight? I could then
> have a look if ImageMagick also supports this.

See attached for an example djvu file.

If you have djview installed, you should see that the sentence

   Do you have a recipe to create and verify such a highlight?

is not only highlighted, but it also has a text annotation.

I added these annotations with my djvu.el. But as I said, this is
just a front end for the djvused command line tool that is doing the
real work. For example

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

$ djvused p1.djvu -e 'output-ant'
select; remove-ant
# -------------------------------------
select 'p1.djvu'
set-ant
(maparea "" "Use my package djvu.el." (rect 56 778 3364 84) (hilite #EEFF00) (opacity 50) (none))
(maparea "" "" (rect 56 3531 1184 146) (hilite #FF0070) (opacity 50) (none))
.

<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<

See the man page of djvused.