Bug #937

Convert lossy compression in JPEG 2000 images to lossless compression

Added by Evelyn McLellan almost 11 years ago. Updated almost 9 years ago.

Status:VerifiedStart date:
Priority:MediumDue date:
Assignee:Evelyn McLellan% Done:

0%

Category:-
Target version:Release 0.7
Google Code Legacy ID:archivematica-282 Pull Request:
Sponsored: Requires documentation:

Description

Currently all JPEG 2000 images are left in their native format. However, only losslessly compressed JPEG 2000 is considered a good preservation format. We need to ensure that lossily compressed ones are uncompressed and recompressed using lossless JPEG 2000 compression. This will prevent "generation loss" - repeated compression and decompression resulting in progressive data loss.

[g] Legacy categories: Preservation planning

History

#1 Updated by Evelyn McLellan almost 11 years ago

Can use ImageMagick to convert to lossless JPEG2000 compression. See http://www.archivematica.org/wiki/index.php?title=JPEG2000_lossy_to_JPEG2000_lossless_using_ImageMagick. I will add format policy to next version of Archivematica.

#2 Updated by Evelyn McLellan almost 11 years ago

  • Target version set to Release 0.7

Changing to 0.7 because latest release was 0.6.2. See updated development roadmap at http://www.archivematica.org/wiki/index.php?title=Development_roadmap

[g] Labels added: Milestone-Release-0.7

#3 Updated by Evelyn McLellan almost 11 years ago

  • Status changed from New to Verified

Fixed in r892.

Also available in: Atom PDF