Bug 1250795 - luminance-hdr ignores EXIF EV
luminance-hdr ignores EXIF EV
Product: Fedora
Classification: Fedora
Component: luminance-hdr (Show other bugs)
x86_64 Linux
unspecified Severity medium
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Assigned To: Franco Comida
Fedora Extras Quality Assurance
Depends On:
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Reported: 2015-08-05 23:06 EDT by J. Randall Owens
Modified: 2015-12-02 13:15 EST (History)
2 users (show)

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Doc Type: Bug Fix
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Last Closed: 2015-12-02 09:48:35 EST
Type: Bug
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Description J. Randall Owens 2015-08-05 23:06:25 EDT
Description of problem:
After upgrading 2.3.1-8 -> 2.4.0-3, luminance-hdr no longer uses the pictures' exposure values that I presume it previously got from the EXIF data, setting all to 0.

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1. New HDR Image
2. Add Images
3. select some photographs with EXIF data

Actual results:
All EVs set to 0, and I have to set them by hand if I can work out how to calculate appropriate values.

Expected results:
EVs set to whatever fits for each picture.

Additional info:
In case it might be a problem with a particular manufacturer's EXIF, these pictures were taken with a Canon EOS M.
Comment 1 Franco Comida 2015-08-06 09:20:08 EDT
It seems actually a problem with Canon EOS M.
I got this on the terminal: "Warning: Directory Canon, entry 0x0000 has unknown Exif (TIFF) type 0; setting type size 1."

I will further investigate the issue, thank you for reporting it.
Comment 2 Franco Comida 2015-08-07 03:57:54 EDT
I found out exiv2-0.25 fixes the issue.
I am not sure if it will be possible to update to 0.25 cause many packages depend on it.
Comment 3 Rex Dieter 2015-08-12 13:33:03 EDT
Options (in my personal order of preference):

* backport upstream fix included in 0.25 to our 0.24 packaging.

* update to exiv2-0.25 (and rebuild luminance-hdr to use it), and provide a compat-exiv2_024 (or something like that) for any packages not rebuilt yet

* fully update to exiv2-0.25, this will require rebuilding 34 other fedora packages.

I'll think on it.
Comment 4 Fedora End Of Life 2015-11-04 05:53:00 EST
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Comment 5 Fedora End Of Life 2015-12-02 09:48:43 EST
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