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[Bug 678906] Re: fulla -s switch should add alpha channel

To: hugin-bug-hunters@xxxxxxxxxxxxxxxxxxx
From: Gerry Patterson <678906@xxxxxxxxxxxxxxxxxx>
Date: Sat, 27 Nov 2010 15:19:07 -0000
Reply-to: Bug 678906 <678906@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

** Changed in: hugin
   Importance: High => Low

** Changed in: hugin
       Status: New => Confirmed

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fulla -s switch should add alpha channel
https://bugs.launchpad.net/bugs/678906
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Status in Hugin - Panorama Tools GUI: Confirmed

Bug description:
I tried creating a nona wrapper that called fulla to correct tca before each remapping, this didn't work because:

1. the default is to scale the channels to avoid missing edge pixels, this changes the FoV and messes up the stitch.

2. the -s switch turns off this scaling, but the off-colour edge pixels mess-up blending with enblend/enfuse.

The -s switch should introduce 100% transparency where there is missing channel data, this means that the photos would retain their field of view and could still be used as input for nona.