[Digikam-users] Dynax 5D data (was SVN compile [solved])

[Caulier Gilles]

Le Lundi 2 Janvier 2006 14:01, Belinda Martin a écrit :
> On Monday, 2. January 2006 10:05, Thorsten Schnebeck wrote:
> > Hmm, maybe I should add an action menu in Konqi to copy the
> > metatags from raw over to png/jpg?
>
> Well that would be Christmas and Easter at the same time :-))
>

Well copy exif information to jpg/png/tiff isn't a problem with Digikam::DImg 
API. 

About PNG, the better way to save EXIF/IPTC metadata is to create a new bytes 
array saved in like a PNG tag. I will contact the PNG devel team to create 
new standard PNG tag relevant.

This is want mean (for me) that PNG is the better soltion to backup 
JPEG/TIFF/RAW file without lost any metadata, like DNG file format (Adobe 
copyrighted) done, without require any additional library !!!

What we want exactly :

1 / PNG support 16 bits/color/pixels. It's the perfect to backup RAW file 
image data.
2 / PNG support ICC color profile.
3 / PNG can embeded metadata using tags.
4 / PNG use a loss less compression algorithm without using any pattents !
5 / PNG is GPL.
6 / PNG is a standard, DNG no.
7 / No need to use a new library. libPNG is enough and is present by default 
in all linux distro.

My wiewpoint is that PNG is very adapted to save photograph and is more simple 
to use than JPEG or TIFF. A beeter support of PNG is my plan for the 
future...

Gilles