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

[Marie-Noëlle Augendre]

Hi Jeremy,

Did you make some progress on that issue?

Thanks,
Marie-Noëlle

2012/3/8 Jeremy D Rogers <jdrogers at northwestern.edu>

> Aha! I was thinking of looking into distortion correction. The idea was
> interesting, but I had no immediate need so I never looking very deeply
> into this. The s100 may be a good excuse to tackle it. If nobody beats me
> to it, I may take a run at this over the weekend. Thanks for the link,
> Marie-Noelle.
>
> On Thu, Mar 8, 2012 at 10:16 AM, Marie-Noëlle Augendre <
> mnaugendre at gmail.com> wrote:
>
>> 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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>
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-- 
<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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