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[Bug 679856] Re: Pairwise optimization should take into account exposure

To: hugin-devs@xxxxxxxxxxxxxxxxxxx
From: tmodes <679856@xxxxxxxxxxxxxxxxxx>
Date: Mon, 29 Nov 2010 21:18:49 -0000
Reply-to: Bug 679856 <679856@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

** Changed in: hugin
   Importance: Undecided => Wishlist

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

** Tags added: exposure hugin optimization

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Pairwise optimization should take into account exposure
https://bugs.launchpad.net/bugs/679856
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Status in Hugin - Panorama Tools GUI: Triaged

Bug description:
When running auto_align_stack or doing any pairwise control-point generation of an HDR sequence, it makes a huge difference to order the pairing by sequential exposures.    Autobracket sequences are often stored as a seqence with increasing difference from 0 exposure compensation alternating with under and over exposed frames.   If you then optimize in that order you end up matching a heavily under-exposed frame with an heavily-over-exposed one resulting in poor control point generation.   By ordering them from least to most exposed, the pairs are the most similar.