flatten PDF documents with annotations?

[pr-apes]

@pgundlach,

I wonder whether this might be doable with LuaTeX.

This sample PDF document contains a number of annotations which are lost in the resulting <Image>.

Original page (printed in grayscale):

Imported <Image>:

I guess that LuaTeX cannot import PDF annotations as such, but I wonder whether it could flatten them before <Image> (as if they were printed with a virtual printer).

Many thanks for your help.

[pgundlach]

You mean like removing the annotations? This should be doable with LuaTeX, but likely not trivial.

[pr-apes]

I thought it was easier to apply the normal appearance stream to annotations (in order to convert them to standard content).