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Re: [PanoTools-devel] Automatic Seam placement (stitching masks)
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From: Jim W. <jwa...@ph...> - 2006-09-21 21:31:47
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Bruno Postle wrote:
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<pre wrap="">On Thu 21-Sep-2006 at 22:45 +0900, dmg wrote:
</pre>
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<pre wrap="">What is expected behaviour? I suggest the following, but I don't want
to break "backward compatiblity":
* PSD_mask and TIFF_mask create stitching masks, and leave the layers
each separated. They will all have alpha channels with the optimal
mask.
* TIFF_m and PSD_m do not create stitching masks, and leave the layers
each separated? They will all have alpha channels covering the
complete mapped image.
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<pre wrap=""><!---->
My understanding is that PSD_mask and PSD_m each create a single
multilayer file. TIFF_mask and TIFF_m have always created multiple
files.
The nona stitcher introduced another format called TIFF_multilayer
which is a single multilayer TIFF file with no masks.
Apparently the TIFF standard is a bit vague concerning these
'multilayer' files. Some tools will open them as a series of
images, some as a series of layers.</pre>
</blockquote>
>From the help file I created for PTStitcher I have PSD_mask and
PSD_nomask<br>
PSD_m may also be an option. But I don't recall.<br>
<a class="moz-txt-link-freetext" href="http://photocreations.ca/panotools/stitch.txt">http://photocreations.ca/panotools/stitch.txt</a><br>
<br>
PSD and TIFF will create a single layered collapsed file.<br>
<br>
PSD_mask and PSD_nomask creates a single files with multiple layers.<br>
PSD_mask has a stitching (feathering) mask and an image mask on each
layer. I don't believe Adobe does not refer to these as alpha channels.<br>
PSD_nomask still has the image mask but does not contain any stitching
(feathering) mask.<br>
TIFF_mask and TIFF_m both creates multiple files and both have a alpha
mask.<br>
TIFF_mask the mask is the stitching (feathering) mask<br>
TIFF_m the mask is the image mask.<br>
<br>
The information in stitch.txt contradicts what I just wrote about
TIFF_m. It says it has two alpha mask. Now I think it only has one. I
believe PSD_mask and PSD_nomask have the two. Even PSD_nomask have an
empty mask created. <br>
<br>
The way it was implemented for the PSD files to have both an image mask
and a feathering mask was a bit of a hack. Pano12 does not work with 5
channel images. Just 1, 3, or 4. Ideally it would be nice to have
work with 5 channels. That way it is possible to modify the feathering
mask to hide or show more image but never showing non-image data. If
creating a feathering mask could be done by adding a new mask and not
destroying the existing image mask that would remove the hack. This
was not possible in the past without the code to PTStitcher.<br>
<br>
<br>
<pre class="moz-signature" cols="72">--
Jim Watters
jwatters @ photocreations . ca
<a class="moz-txt-link-freetext" href="http://photocreations.ca">http://photocreations.ca</a>
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