Bug 333001

Summary:	JP2 compression has no effect
Product:	[Applications] digikam	Reporter:	DrSlony <bugs>
Component:	Plugin-DImg-JP2K	Assignee:	Digikam Developers <digikam-bugs-null>
Status:	RESOLVED FIXED
Severity:	normal	CC:	bugs, caulier.gilles
Priority:	NOR
Version:	4.2.0
Target Milestone:	---
Platform:	Gentoo Packages
OS:	Linux
Latest Commit:	http://commits.kde.org/digikam/a0aa06602dca543d4bcb6d4529b6547b416056f1	Version Fixed In:	4.3.0

Description DrSlony 2014-04-03 07:27:02 UTC

JPEG2000 images always end up saved with the same file size regardless of "quality" slider setting or whether "lossless" is enabled or not. Tested in BQM and showFoto.

Reproducible: Always

Comment 1 DrSlony 2014-08-06 22:31:58 UTC

Still not fixed in 4.2.0.

Comment 2 caulier.gilles 2014-08-22 11:59:23 UTC

I can reproduce the problem with digiKam and KColorPaint, which use the same rules about JP2 compression rate passed to Jasper lib.

Sound like a problem with Jasper lib options parser to jp2_encode().

Gilles Caulier

Comment 3 caulier.gilles 2014-08-22 14:58:56 UTC

Git commit a0aa06602dca543d4bcb6d4529b6547b416056f1 by Gilles Caulier.
Committed on 22/08/2014 at 14:57.
Pushed by cgilles into branch 'master'.

Fix rate value argument to pass to Jasper::jp2_encode().
Rate value must use comma float, not dot float notation.
Constify and polish.
FIXED-IN: 4.3.0

M  +2    -1    NEWS
M  +13   -16   libs/dimg/loaders/jp2kloader.cpp
M  +1    -1    libs/dimg/loaders/jp2kloader.h

http://commits.kde.org/digikam/a0aa06602dca543d4bcb6d4529b6547b416056f1