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[Bug 678848] Re: matchpoint fails on images with alpha channels

To: hugin-devs@xxxxxxxxxxxxxxxxxxx
From: tmodes <678848@xxxxxxxxxxxxxxxxxx>
Date: Mon, 09 Dec 2013 18:04:15 -0000
Reply-to: Bug 678848 <678848@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

matchpoint is supersedes by cpfind and was removed now from the sources.

** Changed in: hugin
       Status: Triaged => Won't Fix

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https://bugs.launchpad.net/bugs/678848

Title:
  matchpoint fails on images with alpha channels

Status in Hugin - Panorama Tools GUI:
  Won't Fix

Bug description:
  match-n-shift uses PTmender to create conformal input for
  generatekeys/matchpoint, this data has an alpha channel, which causes
  matchpoint to fail:

  ContractViolation:
  Precondition violation!
  importImage(): number of bands (color channels) in file and destination image differ.
  (/BUILD/hugin-0.7.0/src/foreign/vigra/vigra/impex.hxx:118)
  Error! Image can not be opened

  matchpoint should ignore alpha data, or even better it could use the
  alpha channel to define areas where it shouldn't find features.

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