hugin-devs team mailing list archive

[Brent Townshend <739060@xxxxxxxxxxxxxxxxxx>]

PS: Note that this is from a version of enblend modified to use
Euclidean distances instead of Manhattan for the NFT.   But, in any
case, similar loops are present in the current mercurial version
unmodified.

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https://bugs.launchpad.net/bugs/739060

Title:
  Seam optimizer gives loops, near-loops, and excessive deviations from
  an optimal path

Status in Enblend:
  New

Bug description:
  See attached 'visualize' file for details.

  Seam line optimization seems to be giving closed loops and near-closed
  loops that visually appear to have much better solutions.    I played
  with the various weightings (anneal, smoothing, optimizer-weights) and
  although I can pull the seam closer to the NFT, the loops are still
  problematic.   From a 30,000-foot view, it appears that the optimizer
  should be weighting in the LENGTH of the seam line as well as it's
  cost and distance from the NFT.   The results I'm seeing appear to be
  the result of minimizing a mix of the distance from the NFT and the
  average cost of the path (which would be insensitive to the path
  length).   If the length were taken into account, then any loop would
  be eliminated since it can only add cost to short-circuiting it.