<html><head></head><body><div style="font-family: Verdana;font-size: 12.0px;"><div> <div>I did not mention that it is a pdf from a scan. "-aa no" does unfortunately not work. The alternative to use -gray and convert the pgm via threshold to pbm is better than using -mono but the result is still not exactly the original.</div> <div> </div> <div>pdfimages works, great, thanks</div> <div> </div> </div></div></body></html>