Bug 222328 - In-place rotation converts 16 bit TIFF to 8 bit
Summary: In-place rotation converts 16 bit TIFF to 8 bit
Status: RESOLVED DOWNSTREAM
Alias: None
Product: digikam
Classification: Applications
Component: Plugin-Bqm-Rotate (show other bugs)
Version: unspecified
Platform: Debian testing Linux
: NOR normal
Target Milestone: ---
Assignee: Digikam Developers
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2010-01-12 05:02 UTC by Sven Coenye
Modified: 2017-07-28 03:44 UTC (History)
0 users

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Latest Commit:
Version Fixed In: 1.1.0
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Description Sven Coenye 2010-01-12 05:02:36 UTC 
Version:           1.0.0 (using KDE 4.3.2)
OS:                Linux
Installed from:    Debian testing/unstable Packages

The in-place rotate functions in the image context menu turn 16 bit TIFF files into 8 bit files. 

Expectation: 16 bit images should remain 16 bit.

Steps to reproduce:
- Click on a 16 bit/channel image in the thumbnail bar.
- Right click over the image in the main panel
- Select Rotate/Left or Rotate/Right
- The end result is an 8 bit/channel image

As the original file is overwritten, this bug is rather destructive.
Comment 1 Sven Coenye 2010-01-13 02:28:46 UTC 
Correction: this appears to be a "feature" of the underlying utility, convert, as built by Debian in GraphicsMagick 1.3.5-6. This package does not support 16 bit/channel. Replacing GraphicsMagick  with the real ImageMagick fixes this issue.