Archived posting to the Leica Users Group, 2009/09/09

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Subject: [Leica] M9 Uncompressed DNG Files
From: hopsternew at gmail.com (Geoff Hopkinson)
Date: Thu, 10 Sep 2009 07:34:28 +1000
References: <12063158.1252512287131.JavaMail.root@elwamui-polski.atl.sa.earthlink.net>

Any DNG aware software should be able to read them fine. There are two types
of compression relevant. There is an option to not use the non-linear
compression to 8 BIT (then reconstruction when the file is de-compressed
again) that is standard with the M8. So you get the high BIT file (actually
14 BIT). The non-linear compression with the M8 was a compromise for file
size for storage and processing speed. Leica's position was that the quality
loss was not significant. Basically no tonal information is lost with the
new option but you need more processing power in the camera and storage
space. 36MB (or 18MB) files vs. 10MB currently.
Then there is lossless compression for file storage. Curently that can be
optionally applied by the converter software.
Adobe Camera Raw 5.5 will include profiling for the M9 specifically.

2009/9/10 <red735i at earthlink.net>

> Is this a big deal?  Can any software address and use this file mode, and
> how does it help/improve image performance?
>
> Frank F
>
> _______________________________________________
> Leica Users Group.
> See http://leica-users.org/mailman/listinfo/lug for more information
>



-- 
Cheers
Geoff
Alles was eine gute Kamera braucht / Everything a good camera needs:

http://gallery.leica-users.org/v/gh/
http://www.pbase.com/hoppyman


In reply to: Message from red735i at earthlink.net (red735i at earthlink.net) ([Leica] M9 Uncompressed DNG Files)