[Digikam-users] Re: Store image as AdobeRGB
marcel.wiesweg at gmx.de
Thu Dec 2 10:57:05 GMT 2010
> Hm, maybe you could tell me where I would have to look excatly for the
> color profile? I did not try jpg or png yet.
The right sidebar, Color / Profile is the right place. Any wrong information
there is a bug.
> I'm still looking for some
> good master format to save my images during my editing workflow. Until now
> I thought about jpg2000 or tiff. Any other recommanedations?
There are four in the choice of lossless file formats: PNG, TIFF, JPEG2000,
PNG and TIFF will result in pretty large files: TIFF is often not compressed
at all, and PNG uses a simple compression scheme (you get small files if
there are large parts in the same color, like charts or diagrams, obviously
not for real-life photos). Advantages of TIFF and PNG: widely supported - you
can pass files around to your friends - and low computation when loading /
saving (but when files are larger, harddisk access takes longer, I dont know
if they really load and save faster)
JPEG2000 and PGF are technically superior, modern file formats, based on
Wavelet transformation. Both support lossy and lossless encoding. Lossy
encoding will give better results than JPG, and lossless will give smaller
files than PNG or TIFF. JPEG2000 is optimized for compression ratio, PGF is
much faster, giving only slightly larger files AFAIK. The only drawback of
these formats is that they are not as widely supported as JPG, PNG or TIFF,
PGF probably even less then JPEG2000.
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