Bug #84665 for PDF-API2: Update CCITT Group 4 compression support in TIFF decoder

Tue Apr 16 08:42:58 2013 mjas [...] itu.dk - Ticket created

Subject:	g4 compression feature request
Date:	Tue, 16 Apr 2013 14:42:23 +0200
To:	<bug-PDF-API2 [...] rt.cpan.org>
From:	"Mark J. Nelson" <mjas [...] itu.dk>

Hi, A feature request, forwarded from the Debian bug tracker: Some scan/fax users of PDF::API2 run into an unsupported type of compression. In particular, in PDF::API2::Resource::XObject::Image::TIFF, if(ref($tif->{imageOffset})) { die "chunked ccitt g4 tif not supported."; } I'm not familiar enough with what would be needed to add support to know how reasonable a request this is, however. Debian bug: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=549653 Best, Mark -- Mark J. Nelson IT University of Copenhagen http://www.kmjn.org/

Thu Jun 12 23:50:27 2014 steve [...] deefs.net - Subject changed from 'g4 compression feature request' to 'Add CCITT Group 4 compression support to TIFF decoder'

Thu Jun 12 23:50:27 2014 steve [...] deefs.net - Severity Wishlist added

Fri Jun 13 00:11:29 2014 steve [...] deefs.net - Correspondence added

Subject:

Update CCITT Group 4 compression support in TIFF decoder

This needs some more research. Based on the Debian bug (which claims that G3 is being used, not G4), the error message may be incorrect. Regardless, adding support requires either expanding the CCITT decoder or replacing it with another module. A quick search of CPAN didn't turn up anything (except maybe the Imager module). See the following URLs for Group 4 specification details: http://www.digitalpreservation.gov/formats/fdd/fdd000136.shtml http://www.itu.int/rec/T-REC-T.6-198811-I/en The TIFF specification is here: https://partners.adobe.com/public/developer/en/tiff/TIFF6.pdf

Fri Jun 13 00:11:29 2014 The RT System itself - Status changed from 'new' to 'open'

Fri Jun 13 00:11:51 2014 steve [...] deefs.net - Subject changed from 'Add CCITT Group 4 compression support to TIFF decoder' to 'Update CCITT Group 4 compression support in TIFF decoder'

Mon Mar 04 13:34:13 2019 PMPERRY [...] cpan.org - Correspondence added

FYI, this is fixed in PDF::Builder (requires use of optional Graphics::TIFF library)