[Digikam-users] Preview and editing of raw

[Julien Narboux]

Gilles Caulier a écrit :
>
>
> 2008/9/29 skmg <mikhako at gmail.com <mailto:mikhako at gmail.com>>
>
>
>
>
>     Gerhard Kulzer-3 wrote:
>     >
>     > On Monday 29 September 2008 08:28:25 skmg wrote:
>     >> Gerhard Kulzer-3 wrote:
>     >> > On Sunday 28 September 2008 20:04:50 skmg wrote:
>     >> >> Hi
>     >> >>
>     >> >> I see that preview of CR2 image differs much from the same
>     image which
>     >> >> is loaded for editing. Editing image is more lighty, with
>     other color
>     >> >> balance
>     >> >> and etc. I can not get same colors as it showed in preview.
>     How can I
>     >> >> reach
>     >> >> these colors by editing and converting to jpg?
>     >> >
>     >> > Sorry to start with a heretic question: if you want an image
>     to look
>     >> like
>     >> > a
>     >> > jpg, why don't you shoot in jpg mode?
>     >> >
>     >> > If you shoot RAW images you should want to control how they look
>     >> whatever
>     >> > that
>     >> > means. You want your own thing!
>     >> >
>     >> > It took me quite a while to realize that for myself: If I
>     like the way
>     >> > the jpgs straight out of the camera look there is no reason
>     to shoot in
>     >> > RAW and
>     >> > try to reproduce something that the manufacturer took a lot
>     of care and
>     >> > money
>     >> > to produce (that particular recipe is hard to beat). I rather
>     take the
>     >> > jpgs,
>     >> > convert them to a lossless format like png and be happy with it.
>     >> >
>     >> > When I use RAW images nowadays I have a particular aim in my
>     mind or I
>     >> > just
>     >> > play with the freedom of interpretation, I've given up to imitate
>     >> > industrial
>     >> > products which are close to perfect in their own sense (jpgs
>     straight
>     >> > from the
>     >> > camera).
>     >> >
>     >> > Other good reasons to take RAW images are: fidelity,
>     repeatability,
>     >> noise
>     >> > reduction, hight light and dynamic range recovery. In there
>     are some
>     >> > reasons
>     >> > that might you may want to reproduce the looks of industry
>     fashioned
>     >> > products
>     >> > (jpgs). Usually I can achieve that (with CR2s) by importing
>     RAWs with
>     >> > everything set to default, white balance set to camera and
>     applying a
>     >> > camera
>     >> > provided profile to the result.
>     >> >
>     >> > Gerhard
>     >> >
>     >> > _______________________________________________
>     >> > Digikam-users mailing list
>     >> > Digikam-users at kde.org <mailto:Digikam-users at kde.org>
>     >> > https://mail.kde.org/mailman/listinfo/digikam-users
>     >>
>     >> Hi
>     >> You don't understand me. I mean preview which is generated by
>     digikam.
>     >> btw,
>     >> editor must be able to reach the same colors. CR2 is much
>     powerfull with
>     >> more abilities. I just want to start with editing from the same
>     view as
>     >> preview has.
>     > As I said above:
>     > Usually I can achieve that (with CR2s) by importing RAWs with
>     everything
>     > set
>     > to default, white balance set to 'camera' and applying a camera
>     provided
>     > profile to the result. You have to apply the same camera profile
>     variant
>     > as
>     > you've set your camera to (e.g. landscape or neutral). My camera
>     is a EOS
>     > 40D.
>     > But it works with the 30D too, just have to use the appropriate
>     profiles.
>     >
>     > Gerhard
>     >
>     > _______________________________________________
>     > Digikam-users mailing list
>     > Digikam-users at kde.org <mailto:Digikam-users at kde.org>
>     > https://mail.kde.org/mailman/listinfo/digikam-users
>     >
>     >
>
>     usually, I have no problem with white balance. The biggest problem is
>     brithness and contrast. May be, saturation. The part of image is
>     slighly
>     overexposured, but preview shows details there, halftones, and
>     image is in
>     balanse. When I open to edit whit defaults, these details
>     disappears. These
>     parts begin to be too ligthy. When I begin to play around brightness,
>     contrast, I am losing halftones. So, I just want to begin to work
>     with image
>     from same stage which is in preview.
>
>     I am using 400D. How can I import camera profiles to editor? And
>     why preview
>     has it but not editor?
>
>
> Preview == JPEG image embeded in RAW file. this is _not_ rendered from 
> RAW image data.
>
> This is why color sound fine for you : camera device firmware has 
> processed white balance + other stuff automatically.
>
> RAW is different. nothing is done. you must trying to do what the 
> camera has done for you with JPEG, plus some variations of course...
>
> digiKam 0.9.4 (not 0.9.3) try to do white balance + auto gamma with 
> RAW files. in 0.9.5 (KDE3) and 0.10.0 (KDE4) a new RAW Import tool is 
> done to be able to tune finelly all settings. Look here :
>
> http://www.digikam.org/drupal/node/370
> http://www.digikam.org/drupal/node/365
> http://www.digikam.org/drupal/node/364
>
> Gilles Caulier
Hi,

Maybe Digikam could guess white balance, saturation, etc  using the 
embedded jpeg, this would produce by default a picture which look like 
vendor's jpeg.

My 2 cent,

Julien