Bug 2442 – tiff2pdf renders pdf with severely degredaded images

Bug 2442 - tiff2pdf renders pdf with severely degredaded images

Summary:

tiff2pdf renders pdf with severely degredaded images

Status:	RESOLVED LATER

Product:	libtiff
Component:	default
Version:	unspecified
Platform:	PC Linux

Importance:	P2 enhancement
Target Milestone:	---
Assigned To:	Frank Warmerdam

URL:
Whiteboard:
Keywords:	migrated_to_gitlab

Depends on:
Blocks:
	Show dependency tree / graph

Reported:	2013-06-26 05:29 by Petr Gajdos
Modified:	2019-10-01 14:19 (History)

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Description From Petr Gajdos 2013-06-26 05:29:40

How to reproduce:

    wget http://www.edrawsoft.com/images/examples/TIFF-2.png
    convert TIFF-2.png TIFF.tiff
    tiff2pdf TIFF.tiff -o tiff.pdf
    $pdf_viewer tiff.pdf

For details see:
https://bugzilla.novell.com/show_bug.cgi?id=819142

Thanks

------- Comment #1 From Petr Gajdos 2013-06-26 05:31:19 -------

convert seems to use zip/Deflate by default, which seem to trigger the issue.

------- Comment #2 From Petr Gajdos 2013-06-26 05:33:22 -------

Changing compression to lzw, one gets better results:

    wget http://www.edrawsoft.com/images/examples/TIFF-2.png
    convert TIFF-2.png -compress lzw TIFF.tiff
    tiff2pdf TIFF.tiff -o tiff.pdf
    $pdf_viewer tiff.pdf

------- Comment #3 From Petr Gajdos 2013-06-26 06:06:31 -------

Tested with version 3.8.2 and version 4.0.3, both have same symptoms.

------- Comment #4 From Even Rouault 2019-10-01 14:19:58 -------

Bugzilla is no longer used for tracking libtiff issues. Remaining open tickets,
such as this one, have been migrated to the libtiff GitLab instance at
https://gitlab.com/libtiff/libtiff/issues .

The migrated tickets have their summary prefixed with [BZ#XXXX] where XXXX is
the initial Bugzilla issue number.