PowerShot S100 RAW pictures not treated properly
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PowerShot S100 RAW pictures not treated properly
 
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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 --  Mes dernières photos sont dans ma galerie. Retrouvez-moi aussi sur mon blog. Et parcourez les Cévennes à ma façon avec Cévennes Plurielles, _______________________________________________ Digikam-users mailing list [hidden email] https://mail.kde.org/mailman/listinfo/digikam-users |
Re: PowerShot S100 RAW pictures not treated properly
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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 <[hidden email]> 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. _______________________________________________ Digikam-users mailing list [hidden email] https://mail.kde.org/mailman/listinfo/digikam-users |
Re: PowerShot S100 RAW pictures not treated properly
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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 <[hidden email]> Can you open a ticket in bugzilla with a link to a test RAW file. I will CC Alex Tutubalin from libraw for review -- Mes dernières photos sont dans ma galerie. Retrouvez-moi aussi sur mon blog. Et parcourez les Cévennes à ma façon avec Cévennes Plurielles, _______________________________________________ Digikam-users mailing list [hidden email] https://mail.kde.org/mailman/listinfo/digikam-users |
Re: PowerShot S100 RAW pictures not treated properly
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ok, thanks. I take a look
Gilles
2012/3/8 Marie-Noëlle Augendre <[hidden email]> Here you are: https://bugs.kde.org/show_bug.cgi?id=295523 _______________________________________________ Digikam-users mailing list [hidden email] https://mail.kde.org/mailman/listinfo/digikam-users |
Re: PowerShot S100 RAW pictures not treated properly
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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 <[hidden email]> wrote: ok, thanks. I take a look _______________________________________________ Digikam-users mailing list [hidden email] https://mail.kde.org/mailman/listinfo/digikam-users |
Re: PowerShot S100 RAW pictures not treated properly
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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 <[hidden email]> 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. -- Mes dernières photos sont dans ma galerie. Retrouvez-moi aussi sur mon blog. Et parcourez les Cévennes à ma façon avec Cévennes Plurielles, _______________________________________________ Digikam-users mailing list [hidden email] https://mail.kde.org/mailman/listinfo/digikam-users |
Re: PowerShot S100 RAW pictures not treated properly
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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 <[hidden email]> 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/ _______________________________________________ Digikam-users mailing list [hidden email] https://mail.kde.org/mailman/listinfo/digikam-users |
Re: PowerShot S100 RAW pictures not treated properly
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Hi Jeremy,
Did you make some progress on that issue? Thanks, Marie-Noëlle 2012/3/8 Jeremy D Rogers <[hidden email]> 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. -- Mes dernières photos sont dans ma galerie. Retrouvez-moi aussi sur mon blog. Et parcourez les Cévennes à ma façon avec Cévennes Plurielles, _______________________________________________ Digikam-users mailing list [hidden email] https://mail.kde.org/mailman/listinfo/digikam-users |
Re: PowerShot S100 RAW pictures not treated properly
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Hi Marie-Noelle,
Sorry for not getting back sooner.. turns out the first few weeks of having a baby is not filled with free time. I did a quick try at creating a lens entry for the S100, but so far I am not able to get the digikam distortion correction to work. I get an error "cannot find all lens information.." I'll look into to it further, but if you want to try playing with it, here is what I have so far. (Note: the numbers I calculated for the distortion could stand to be improved and I'll do a better set of images with finer focal ranges when I get the lensfun library to work at all.) I added the following entries to /usr/share/lensfun/compact-canon.xml <mount> <name>canonS100</name> <compat>Generic</compat> </mount> <camera> <maker>Canon</maker> <model>Canon PowerShot S100</model> <model lang="en">Canon PowerShot S100</model> <mount>canonS100</mount> <cropfactor>4.6</cropfactor> </camera> <lens> <maker>Canon</maker> <model>Canon PowerShot S100 5.2 - 26.0 mm</model> <mount>canonS100</mount> <cropfactor>4.6</cropfactor> <calibration> <distortion model="ptlens" focal="5.2" a="-0.021" b="0" c="-0.097" /> <distortion model="ptlens" focal="8.31" a="-0.06" b="0" c="-0.0315" /> <distortion model="ptlens" focal="13.42" a="-0.002" b="0" c="-0.01" /> <distortion model="ptlens" focal="26.0" a="0" b="0" c="-0.002" /> </calibration> </lens> Best, JDR On Thu, Mar 15, 2012 at 3:31 PM, Marie-Noëlle Augendre <[hidden email]> wrote: Hi Jeremy, _______________________________________________ Digikam-users mailing list [hidden email] https://mail.kde.org/mailman/listinfo/digikam-users |
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