The main question is what you're going to do with these pictures:
- if they will be published on the web, you need only resized and
compressed JPEG, and you won't need more pixels than your users can display
on their screen
- if it is for printing, you'll need the highest quality you can produce,
with 300 dpi for small/middle formats, and a bit less for big prints.
Disk spaces is less and less a problem as their price continue to go down.
As for myself, I don't treat every picture; but those I 'develop' are
exported from DT in TIFF - and that is often 40 or 50 Mb given the size of
my camera; and it is only when I decide how I will use them that I convert
them in JPEG or whatever, and I usually don't keep these files after they
have been published or printed.
So RAW is my original picture, and TIFF is always the master file from
which I produce anything else.
My 0.02.
Marie-Noëlle
2013/10/19 Andreas Kahl <[email protected]>
> That's a very useful information - perhaps the problem ist on the side of
> Viewer-Applications. Has anyone else a recommendation what works?
>
> About using PNG or TIFF as an alternative: They result in larger image
> files than the original RAW.
> .RW2: 20MB
> .PNG: 25MB
> .TIF: 28MB
> .JP2: 5.7MB
> .JPG: 4.3MB
> The JPEGs are converted with 97% Quality in Darktable. For TIF and PNG I
> used the 16bit-Variant. Perhaps harddisk-sizes are going to grow faster
> than my image pool and in the end I'll stop converting at all and just keep
> the RAWs. During my research about the JPEG2000, I found an interesting
> text - in German - about file formats here:
> http://digicam-experts.de/wissen/1
>
> I also got very good results for tone mapping (aka HDR) single exposures.
> But my Software, HDRtist for Mac, supports only low resolutions in the free
> version; additionally I am not sure whether it ignores the .XMPs generated
> by Darktable. For HDR I think I need a bit more of practicing. One major
> downside is that I have no solutions for batch converting Darktable +
> HDR-processing up to now.
>
> Andreas
>
>
>
>
--
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