[Digikam-users] PowerShot S100 RAW pictures not treated properly

[JD Rogers]

I think that raw view is correct. It is raw, afterall. I wasn't so sure
about the magenta tint (when I first read your post, I was thinking there
was a dcraw version problem) but that could just be the effect of the white
balance. Looking at your photo, it doesn't seem any worse than my test
images. The distortion is dramatic for the s100's lens. I was reading about
it some before I bought the camera. My understanding is that the in-camera
processor corrects the distortion for jpg (and hence for the raw thumbnail
preview). But raw is raw. And its pretty dramatic! The camera even has
several "creative settings" like fisheye, toy camera, and minature effect
that apparently alter how much distortion is corrected.

I hadn't played with raw on this camera much yet, so you've inspired me to
look at it more. The distortion depends heavily on the focal length (zoom)
of the lens, so the question is weather the digikam distortion correction
can be setup to handle it. I just tried the lens auto-correction in the
batch queue manager using "meta data" and it failed, but I've never used
that before, so I have to play with it more.

I guess the details of this lens must be entered into a lens library?

JDR

On Thu, Mar 8, 2012 at 6:34 AM, Gilles Caulier <caulier.gilles at gmail.com>wrote:

> ok, thanks. I take a look
>
> Gilles
>
> 2012/3/8 Marie-Noëlle Augendre <mnaugendre at gmail.com>
>
>> Here you are: https://bugs.kde.org/show_bug.cgi?id=295523
>> I've put two links to both CR2 and JPG files.
>>
>> Thanks,
>> Marie-Noëlle
>>
>>
>> 2012/3/8 Gilles Caulier <caulier.gilles at gmail.com>
>>
>>> Can you open a ticket in bugzilla with a link to a test RAW file. I will
>>> CC Alex Tutubalin from libraw for review
>>>
>>> Thanks in advance
>>>
>>> Gilles Caulier
>>>
>>> Le 8 mars 2012 12:04, Marie-Noëlle Augendre <mnaugendre at gmail.com> a
>>> écrit :
>>>
>>>>  In 2.5.0 version, the CR2 PowserShot S100 pictures are displayed fine
>>>> in thumbnail size. But when I double-click on them to display full size,
>>>> the photo is heavily magenta-tinted, with a strong lens distorsion. Same
>>>> thing when I open theses pictures in the editor.
>>>>
>>>> Components are the following:
>>>> digiKam version 2.5.0
>>>> Composant graphique Marble: 0.12.2 (stable release)
>>>> Dématriçage parallélisé: Oui
>>>> Exiv2 peut écrire dans un fichier JP2: Oui
>>>> Exiv2 peut écrire dans un fichier JPEG: Oui
>>>> Exiv2 peut écrire dans un fichier PGF: Oui
>>>> Exiv2 peut écrire dans un fichier PNG: Oui
>>>> Exiv2 peut écrire dans un fichier TIFF: Oui
>>>> Exiv2 prend en charge les métadonnées XMP: Oui
>>>> LibCImg: 130
>>>> LibClapack: bibliothèque interne
>>>> LibExiv2: 0.21.1
>>>> LibJPEG: 62
>>>> LibJasper: 1.900.1
>>>> LibKDE: 4.7.4 (4.7.4)
>>>> LibKExiv2: 2.0.0
>>>> LibKGeoMap: 2.0.0
>>>> LibKdcraw: 2.0.0
>>>> LibLCMS: 119
>>>> LibPGF: 6.11.42 - bibliothèque interne
>>>> LibPNG: 1.2.46
>>>> LibQt: 4.8.0
>>>> LibRaw: 0.13.5
>>>> LibTIFF: LIBTIFF, Version 3.9.5 Copyright (c) 1988-1996 Sam Leffler
>>>> Copyright (c) 1991-1996 Silicon Graphics, Inc.
>>>> LibGphoto2: 2.4.11
>>>> LibKface: 2.0.0
>>>> LibKipi: 1.2.0
>>>> LibOpenCV: 2.3.1
>>>> Libface: 0.2
>>>> Moteur de base de données: QSQLITE
>>>>
>>>>
>>>> Marie-Noëlle
>>>>
>>>>
>>
>>
>> --
>> <http://www.marie-noelle-augendre.com/photos/>
>>
>> Mes dernières photos sont dans ma galerie<http://www.marie-noelle-augendre.com/photos/>
>> .
>> Retrouvez-moi aussi sur mon blog <http://www.mnaugendre.com/>.
>> Et parcourez les Cévennes à ma façon avec Cévennes Plurielles<http://www.cevennes-plurielles.com/>,
>>
>>
>>
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>>
>
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