[digiKam] -- extracting jpegs from RAW

[Gilles Caulier]

digiKam can process RAW file in batch using JPEG preview image embedded in
RAW. Look in Batch Queue Manager queue settings. It's very easy to use.

Gilles Caulier

2018-02-20 19:18 GMT+01:00 Remco Viëtor <remco.vietor at wanadoo.fr>:

> On mardi 20 février 2018 18:22:32 CET Tac Tacelosky wrote:
> > I'm a bit confused about something, and hoping someone can help.
> >
> > I read that saving RAW+Fine in the camera was a waste of space, because
> the
> > JPEG image is stored as a preview in the RAW file itself.
>
> A jpeg preview is usually stored in the Raw, but at a much smaller size,
> like
> 1/4 of the full size. Those jpegs are rendered with the same settings as
> for a
> camera-generated full jpeg apart from the demosaicing, so they should look
> identical on screen.
>
> > But I also read that the JPEG rendering in my Fuji x100 is quite good,
> and
> > is often better than "Save as JPEG" image I get when simply adding RAW
> > images to a queue as saving them as JPEGs in another folder.
> >
> > So I'm either doing something wrong, or misunderstanding something.
> >
> > I don't care much about the disk space, but it's a bit of a pain to have
> 2
> > images, displayed identically (the jpeg and the embedded jpeg preview)
> when
> > using digiKam to rate my images after import, when I'm trying to decide
> > what should happen next for each one.
> >
> > And certainly I don't want to archive both the raw and jpeg if the jpeg
> is
> > indeed embedded in the file.
>  see above.
>
> > So the question is, can I extract the camera-rendered JPEG using DigiKam,
> > and would it be any different than storing the RAW+Fine or Raw+Normal?
> Or
> > does digiKam render it's own JPEG file from the raw, based on the camera
> > settings (e..g while balance, constrast).
> As explained above, the difference between the embedded and the separate
> camera
> jpegs is the size/resolution.
> Digikam only renders a jpeg when you ask it to, using the editor. And in
> practice it's very difficult to get output from a given raw file  that's
> identical to the corresponding camera jpeg.
>
> > Should I be saving RAW+(Fine|Normal), or is that duplicating data I can
> > easily get.
>
> If you mean "should I be saving Raw + fine to get the proper preview in
> Digikam", the answer is "no", if you want to have a full format jpeg
> without
> doing the editing yourself, the answer is yes (but if you don't want to
> edit
> the raws yourself, why do you shoot Raw as well?).
>
> Remco
>
>
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