[Digikam-users] 16bit editiing and auto-whitebalance

[Gerhard Kulzer]

On Friday 09 May 2008 Lawrence Plug wrote:
> Hi Benjamin and Elle,
> 
> Digikam* displays the low-res jpeg that is embedded in raw files, 
> both as a thumbnail and as a single-click enlarged preview. At 
> least it does for Nikon D300 and D70 NEFs and for Oly E-1 and E-3 
> ORFs. Those are all the cameras I've tried.  So I'm not sure why 
> Elle's step 2 is necessary? Am I missing something? Besides 
> digikam, many other apps display the lowres jpeg as well. As elle 
> notes, the embedded jpeg does have the camera's gamma and 
> 'cookbook' recipe applied, and in my experience composition, 
> exposure, and gross sharpness/focus problems can be detected from 
> this lowres image.

This holds true, and if you have a recent libkdcraw the D60 is supported. I always work with digiKam for reviewing the raw image quality, no need to extract thumbnails by another application, digiKam does it.

Best regards
Gerhard

> 
> Regarding step 1 --raw + jpeg-- I usually do that too, even 
> though the raw preview is available. It is a better criteria for 
> selecting which to develop.
> 
> cheers
> L
> 
> (*applies to digikam 0.9.2  to 0.9.4)
> 
> 
> On Fri, May 09, 2008 at 04:51:57AM -0700, elle stone wrote:
> > 
> > Benjamin Schindler wrote:
> > 
> > > The thing is... I don't know in advance which picture I'm going to
> > > manipulate. This means that I'll shoot everything in raw which makes
> > > processing every picture using dcraw extremely time-consuming. 
> > > To me, it seems this first step is kinda hard to do nicely on linux atm. I
> > > wasn't able to get ViewNX/CaptureNX to work in wine, 
> > > So this is kinda bad atm
> > >
> > Quoted from: 
> > http://www.nabble.com/16bit-editiing-and-auto-whitebalance-tp16701397p17143601.html
> > 
> > Hi, Benjamin,
> > 
> > I have a few suggestions regarding previewing images before selecting the
> > "good ones" - I'm a Canon user, so some suggestions might not be applicable
> > to you.
> > 
> > 1. My Canon 400d offers the option of shooting each picture both in raw and
> > as a low, medium, or high quality jpeg.  Does the Nikon have a similar
> > option?  
> > 
> > 2. Also, my canon raw files all contain a very low res jpeg embedded in the
> > file.  I use dcraw to extract the jpeg.  The command is: 
> > /usr/local/dcraw/dcraw -e /media/process/ingest/*.CR2
> > 
> > That is, I have dcraw installed locally, so the first part of the command is
> > the path to the local installation executable "/usr/local/dcraw/dcraw" then
> > the option "-e" for "extract" and then the path to where the raw images are
> > stored "/media/process/ingest/", then the files themselves, "*.CR2" or
> > ".NEF" in your case (this command is case-sensitive).  These embedded jpegs
> > are very low res, but look exactly like the default secret sauce end product
> > and are perfect for quick review as they load MUCH faster than a raw file. 
> > Do the *.nef files have an embedded jpeg?
> > 
> > 3.  Xnview is a great little image viewer, available both in a linux and
> > windows version.  Apparently the windows version under wine works better
> > than the linux version (I use xnview under wine).  Xnview can show you the
> > embedded jpeg as a thumbnail, and then show you a larger version.  Xnview's
> > renditions are very good.  I just checked and Xnview says it reads *.nef
> > files.
> > 
> > 4. If you have a windows CD you can install windows in a VirtualBox - W2K
> > actually runs much better for me in a VirtualBox under linux than it ever
> > did on "bare metal".  But this is a stop-gap measure, of course, I'm slowly
> > weaning myself away from windows altogether.  
> > 
> > Elle
> > 
> > -- 
> > View this message in context: http://www.nabble.com/16bit-editiing-and-auto-whitebalance-tp16701397p17146376.html
> > Sent from the digikam-users mailing list archive at Nabble.com.
> > 
> > _______________________________________________
> > Digikam-users mailing list
> > Digikam-users at kde.org
> > https://mail.kde.org/mailman/listinfo/digikam-users
> 


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