GIMP and Vuescan Raw Scan

  • Thread starter Thread starter Jack Frillman
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Jack Frillman

I while ago I posted a question about why raw scans from Vuescan were
not showing any images when viewed with GIMP but showed images from
other image viewing applications.

Bart's hypotheses was that GIMP was confusing the IR channel as a
transparent channel. Assuming this is true is there anyway of doodling
with GIMP or Vuescan so this will not happen?
 
Jack said:
I while ago I posted a question about why raw scans from Vuescan were
not showing any images when viewed with GIMP but showed images from
other image viewing applications.

Bart's hypotheses was that GIMP was confusing the IR channel as a
transparent channel. Assuming this is true is there anyway of doodling
with GIMP or Vuescan so this will not happen?
Click to expand...

Can't you specify to save the IR channel separately in Vuescan Pro or omit
it when saving as raw? Seems to me I read this somewhere. This might prove
or disprove the theory. Also GIMP might be more sensitive to the format of
the header info.
 
SNIP
Can't you specify to save the IR channel separately in Vuescan Pro
or omit it when saving as raw? Seems to me I read this somewhere.
Click to expand...

That's correct, the IR channel can be saved separately as a 16-bit
Tiff, but I'm not familiar with Gimp's 16-b/ch capabilities.

Bart
 
* Bart van der Wolf said:
SNIP

That's correct, the IR channel can be saved separately as a 16-bit
Tiff, but I'm not familiar with Gimp's 16-b/ch capabilities.
Click to expand...

Plain GIMP reads and converts 16bit/ch to 8bit/ch.
Cinepaint (offshoot of older gimp version) handles a variety of 16bit/ch
and 32bit/ch pixel formats, but it's other capabilities are a bit
limited or unwieldy. It's a good 'starting stage' nevertheless.
 
Bart said:
SNIP



That's correct, the IR channel can be saved separately as a 16-bit Tiff,
but I'm not familiar with Gimp's 16-b/ch capabilities.
Click to expand...

HOw do you do that?
 
From what I've heard "on the Internet" ...

(1) CinePaint is apparently a proprietary version of "The GIMP" that is
claimed to be 16-bit capable, and is being developed by one of the movie/TV
special effects vendors It is reportedly roughly at the "Very Early Alpha"
stage. It is said to not be s"table," and precompiled binaries are unknown,
but assumed to be *not* available for the PC;

(2) It is also rumored "on the Internet" that all development activities
have been stopped.

(3) "The GIMP" does *not* have any 16-bit capabilities.

More information can be obtained at
http://cinepaint.sourceforge.net/
http://sourceforge.net/projects/cinepaint
http://freshmeat.net/projects/cinepaint
 
* RSD99 said:
From what I've heard "on the Internet" ...
Click to expand...

I think I'll pass over that 'audio' section of 'the Information Highway'.
(1) CinePaint is apparently a proprietary version of "The GIMP" that is
claimed to be 16-bit capable, and is being developed by one of the movie/TV
special effects vendors It is reportedly roughly at the "Very Early Alpha"
stage. It is said to not be s"table," and precompiled binaries are unknown,
but assumed to be *not* available for the PC;
Click to expand...

It's not proprietary. It's a simple fork off an older version of Gimp to
gain 16+bit abilities. Source code is available and freely modifiable
(as long as it's distribution fulfills GPL)
Functionality has been 'good enough' for me. That means that I've been
able to correct levels+curves in 16bit mode and save image for further
manipulation. YMMV.
As for precompiled binaries, Debian has them and I run them on my 'PC'.
(2) It is also rumored "on the Internet" that all development activities
have been stopped.
Click to expand...

It've been quiet for a while. Last I heard, cinepaint folks were
porting their _user interface_ toolkit to FLTK, which basically sounds
like a waste of time.
(3) "The GIMP" does *not* have any 16-bit capabilities.
Click to expand...

True. Only 16bit capability I'm aware of is reading of 16bit files and
downgading them into internal 8bit/ch representation.
It's supposed to change 'soon', and has had for several years now. I
think couple of months ago I saw an proposition to start integrating the
advanced manipulation library into some of the most basic tools. Haven't
heard much since, but I do not follow CVS-commit maillist.
 
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