On 06/11/2013 10:02 PM, Frederic Da Vitoria wrote:
2013/6/12 Gnome Nomad <[email protected] <mailto:[email protected]>>
On 06/11/2013 12:26 PM, Isaac Gouy wrote:
On Tuesday, May 1, 2012 12:16:20 PM UTC-7, Bruno Postle wrote:
On Tue 01-May-2012 at 03:35 -0700, AlekseyM wrote:
>What library Hugin uses to create tiff files? Maybe it is
possible to
>add some options to specify different tiff format?
It would be possible, but the alpha channel in the enblend TIFF
output is useful since a lot of panoramas have transparent
areas.
While I agree that it's useful to support alpha channel (and
I've used
that masking capability with Enfuse), It seems that image processing
software intended for photographers tends not support alpha
channel TIFF
even when it does support 48bit TIFF.
Image processing software intended for a broader audience,
intended for
illustrators, is more likely to support alpha channel TIFF.
For example, the free to use, Serif Photo Plus Starter Edition,
opened
all the problem TIFFs and allowed them to be exported as 24bit
or 32bit
TIFF.
DxO Optics Pro wouldn't open the converted 32bit TIFF but did
open the
converted 24bit TIFF.
Unfortunately it seems very unlikely that the makers of software for
photographers will be persuaded to support alpha channel TIFF.
I understand that the conversion is possible with ImageMagick but
as-well-as my reluctance to install all that stuff on my Windows
install, even Ubuntu now shows a warning that ImageMagick cannot be
authenticated (whatever that means).
Perhaps the better approach would be
yet-another-utility-program, based
on libtiff, which strips the alpha channel and could be used after
Enblend or Enfuse?
Hmmm, Rawtherapee opens Hugin TIFFs with no problems or complaints.
GIMP only complains about them being 16-bit per channel. Haven't
tried opening one in Bibble 5/Aftershot Pro, but that is software
intended for photographers.
Gimp 2.8.4 on Windows does not complain at all, as far as I can see.
Same version I have here, although I run it on Linux, not Windows.
Does it tell you that the input file has 16-bits per channel, GIMP only
supports 8-bits per channel, so it is dropping the other 8 bits per
channel? That's the GIMP "complaint" I'm referring to. GIMP doesn't
support 48-bit (3 16-bit channels). That's scheduled for GIMP 3.
--
David W. Jones
[email protected]
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http://dancingtreefrog.com
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