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

[Marie-Noëlle Augendre]

Regarding the white balance, you can find here a whole set of pictures
taken with different white balances:
http://www.marie-noelle-augendre.com/fichiers/Darktable/

I provided them for the Darktable team to solve the same problem. They
managed to correct the white-balance (it is OK now in Darktable RC1
version) but the lens distorsion problem remains.
i just got this answer on the DT list:
"Darktable uses Lensfun for lens correction. Apparently lensfun has no
correction data for the S100...
You can calibrate it yourself:
http://lensfun.berlios.de/lens-calibration/ "
but I don't think I'll be able to do that. I'd rather someone more tech
than I am do it.

Marie-Noëlle


2012/3/8 JD Rogers <rogersjd at gmail.com>

> 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
>
>
>
>

-- 
<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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