Ghostscript can be used to convert color PDFs to grayscale, from the command line. Check it out:
http://vince-debian.blogspot.com/2008/05/pdf-conversion-to-grayscale.html
Ghostscript can be used to convert color PDFs to grayscale, from the command line. Check it out:
http://vince-debian.blogspot.com/2008/05/pdf-conversion-to-grayscale.html