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[Bug 274865] New: Multipage TIFF files with Exif.Image.Orientation = 1 aren't decoded properly

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Guillaume Paumier

[Bug 274865] New: Multipage TIFF files with Exif.Image.Orientation = 1 aren't decoded properly

https://bugs.kde.org/show_bug.cgi?id=274865

Summary: Multipage TIFF files with Exif.Image.Orientation = 1
aren't decoded properly
Product: digikam
Version: 2.0.0
Platform: Compiled Sources
OS/Version: Linux
Status: UNCONFIRMED
Severity: normal
Priority: NOR
Component: general
AssignedTo: [hidden email]
ReportedBy: [hidden email]

Version: 2.0.0 (using KDE 4.6.2)
OS: Linux

Some pro- and semi-pro cameras allow the photographer to save the images in
TIFF format.

In this case, the file can contain two pages: one for the high-resolution
image, and one for a low-resolution thumbnail.

Digikam seems to have problem decoding such files. I'm not sure if the issue
comes from the multipage TIFF, or the EXIF orientation, or both.

Wiping out the EXIF metadata fixes the problem, but obviously that's not an
acceptable general solution.

Reproducible: Always

Steps to Reproduce:
* Open http://dl.dropbox.com/u/17707983/DSC_0301.TIF (35.2 MB) in digiKam
* Zoom to 100%

Actual Results:
* Strips are visible when viewing the image at 100%
* Strips are actually saved when saving the file in another format, so it's not
only a display issue.

Expected Results:
* The image should be decoded properly.

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Guillaume Paumier

[Bug 274865] TIFF files with Exif.Image.Orientation = 1 aren't decoded properly

https://bugs.kde.org/show_bug.cgi?id=274865

Guillaume Paumier <[hidden email]> changed:

What |Removed |Added
----------------------------------------------------------------------------
Summary|Multipage TIFF files with |TIFF files with
|Exif.Image.Orientation = 1 |Exif.Image.Orientation = 1
|aren't decoded properly |aren't decoded properly

--- Comment #1 from Guillaume Paumier <guillom pom gmail com> 2011-06-03 21:18:30 ---
Note: After further investigation, I can tell this isn't a multipage issue
(adjusting the bug summary accordingly).

I've used tiffsplit and the same problem happens on single-page TIFF files with
Exif.Image.Orientation = 1

Single-page TIFF test file at http://dl.dropbox.com/u/17707983/tiffstripes.tif
(34.5 MB)

The issue could be circumvented by manually resetting the image orientation,
except digikam can't write metadata to TIFF files ( bug 271757 ).

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Guillaume Paumier