[pdftex] JBIG2 graphics and pdftex 1.40.0-beta

John R. Culleton john at wexfordpress.com
Sat Aug 12 00:58:45 CEST 2006

On Friday 11 August 2006 18:23, Hartmut Henkel wrote:
> Hi,
> fyi, there is a new pdftex-beta out, see:
> http://www.ntg.nl/pipermail/ntg-pdftex/2006-August/002305.html
> What's interesting with this one is that it's the first pdftex-beta
> containing support for native embedding of JBIG2 files. JBIG2 is a
> rather new pixel graphics format for bitonal (black and white) images
> like line and text scans, with a substantially better compression ratio
> than other pixel image file formats. One JBIG2 file can contain several
> image pages for even higher compression. PDF files with embedded JBIG2
> graphics can be viewed at least by PDF viewers xpdf 3.01, Adobe Reader
> 6.0 upward, and by recent ghostscript versions.
> Most importantly, at
> http://www.imperialviolet.org/jbig2.html
> you find the first and only open-source JBIG2 encoder (now version
> 0.23), written by Adam Langley. The encoder (binary "jbig2") does an
> impressive job (just option -s is ok). Before this fine program was
> available, one had to rely on expensive commercial encoders. Now you can
> use pdftex e. g. for re-publishing of books with expired copyright as
> compact PDF, by embedding page scans that were converted into JBIG2
> format by jbig2. Hyperlinking can be done by adding of annotations...
> Testing of the jbig2/pdftex-beta team welcome! Have fun!
> Regards, Hartmut
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What changes if any will commercial printers need to make to
accommodate this new format?
John Culleton
Able Indexing and Typesetting
Precision typesetting (tm) at reasonable cost.
Satisfaction guaranteed. 

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