On Fri, 3 Mar 2006, Roman wrote:
Before I purchased my *ist DL I'd seached for Linux support for its *.pef RAW
files and found something called ' ufraw' . This program has GUI - graphical
user interface to change options and preview process of image conversion.
Command-line utility ' dcraw ' does not support Pentax *.PEF files, so it's a
no-no.
To install ufraw simply run these two commands:
su root
yum install ufraw
Contact me if you need more help on this.
The GUI ufraw uses dcraw code to do its raw conversion. Dcraw
supports pentax PEF files just fine... I use it all the time. Not sure
why you'd think otherwise.
My only complaint with ufraw is that it has a mathematically
dubious white-balance computation (especially for Pentax it seems), and
the other curves seem to add too much "enhancement" processing by default.
Still, I use it when I need to do spot white balancing for when the auto
white balance in dcraw isn't quite right.
My full color-managed linux-based workflow is currently as
follows:
dcraw -> 16-bit linear TIFF -> cinepaint + LPROF-generated ICC profile for
my *ist-DS -> Adjustments in WideRGB colorspace -> soft-proof for intended
colorspace -> export in full colorspace for printing, or export to
aRGB/sRGB jpg.
Fortunately, that's only when I need to do much adjustment. For
most things, workflow is a script that does:
dcraw + LPROF-generated ICC profile for my *ist-DS, auto-white balance,
sRGB output colorspace -> temporary ppm at 0.45 gamma (default) ->
ppmtojpeg the result -> exiftool the EXIF info from the .PEF file into the
JPG.
-Cory
--
*************************************************************************
* Cory Papenfuss *
* Electrical Engineering candidate Ph.D. graduate student *
* Virginia Polytechnic Institute and State University *
*************************************************************************
