[Digikam-users] Color management with Nikon d40x

[junk at lexoncom.com]

This is what I feel too.
It looks like Nikon software tweaks the image by deafult and we dont have
control over it (during raw conversion). Digicam does not do anything and
I would say in some sense this is more professional aproach.

thx

 > On Sat, Dec 13, 2008 at 11:56 AM,  <junk at lexoncom.com> wrote:
>> this explains everything, I thought that those thumnails were small.
>> But , i tried to extrat one and it was 903K. Big enough to look very
>> good.
>> One more think, I am curious if Nikon software also displays JPEG as
>> preview while editing or those are Raw images converted to working color
>> space and then updated while editing?
>> Now I understand algorithms used by nikon raw converter and digikam may
>> differ and the final output will depend on how the users uses the
>> editing
>> software editing features.  Initially I though that every software uses
>> same raw conversion and the image would only differ depending on how it
>> was altered during the editing.  It also looks like that it is better to
>> use original raw converters.
>
> If "original" means "from the camera manufacturer", I think it's not
> necessarily so.  For example, there are different methods to map the
> camera pixels to an image element (demosaicing) and none of the
> methods can be said to be correct.  They all have compromises, but
> each has its own set of compromises.  For most applications, for most
> images, for most people, the differences don't matter at all.  One
> thing that has bitten me when trying a new raw converter is that some
> of them automatically apply some exposure touch up.  I'd prefer that
> they didn't.
>
>
>>
>> thx
>>
>>> 2008/12/13 "Sveinn í Felli (IMAP)" <sveinki at nett.is>
>>>
>>>> Following message from Elle Stone via Gerard Kulzer
>>>> dated Tue, 13 May 2008 08:23:24 +0200
>>>> seems to respond to your questions.
>>>> Those thumbnails/lowresJPG's are made in the camera using
>>>> closed proprietary algorythms.
>>>> Cheers
>>>>
>>>> Sveinn í Felli
>>>
>>>
>>> the image used to render _quickly_ thumbnails in digiKam is a small
>>> jpeg
>>> image embeded in RAW and taken by camera during shot. It's not a full
>>> image
>>> resolution version, it's a reduced one generally used to render preview
>>> in
>>> TV or camera screen.
>>>
>>> This JPEG image use all camera algorithms to render properlly
>>> color/gamma.
>>> It's not the RAW image. In fact it have the same render than if you
>>> take a
>>> real JPEG image instead a RAW.
>>>
>>> But you cannot compare RAW image data and JPEG image data : RAW do not
>>> have
>>> color space, JPEG is always in RGB color space.
>>>
>>> Gilles Caulier
>>> _______________________________________________
>>> Digikam-users mailing list
>>> Digikam-users at kde.org
>>> https://mail.kde.org/mailman/listinfo/digikam-users
>>>
>>
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