[magick-developers] Combine JBIG2 files into PDF

[Chris Rodgers]

On 15/05/2009 16:51, duc.sequere.aut.de.via.decede at imagemagick.org wrote:
>> I know that PDF files can contain JBIG2 images.
> 
> JBIG is not currently supported but it is probably not difficult to add
> support for JBIG-compressed PDF.  Post a URL that dicusses JBIG support
> within PDF so we know how its implemented and we will get a patch into
> ImageMagick for the next release.
> 

Hi,

Thanks for replying so quickly.

I'm not an expert on this, but I know that pdflatex now support
including JBIG2 files in PDFs. There is a writeup at

http://www.circuitwizard.de/pdftex/jbig2/jbig2.html

According to that page "Adobe Systems have defined a new filter
/JBIG2Decode in their newest PDF format, version 1.4, which allows
decoding of image data after the JBIG2 standard. It seems that this
feature is first supported by Adobe Acroread version 5.0."

It seems to be documented in:

http://www.adobe.com/devnet/pdf/pdfs/PDF14Deltas.pdf

Best wishes and many thanks,

Chris.