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

To: hugin-devs@xxxxxxxxxxxxxxxxxxx
From: tmodes <679856@xxxxxxxxxxxxxxxxxx>
Date: Wed, 01 Jan 2014 08:55:45 -0000
Reply-to: Bug 679856 <679856@xxxxxxxxxxxxxxxxxx>
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** Changed in: hugin
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/679856

Title:
  Pairwise optimization should take into account exposure

Status in Hugin - Panorama Tools GUI:
  Fix Released

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.

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