hugin-devs team mailing list archive

[Christoph Spiel <cspiel@xxxxxxxxxx>]

Thanks for reviewing the patch!

Just to demonstrate the power of the multi-level blending:
Again set mu=0 and _reduce_ the number of blend levels with
option `--levels'.  You'll find your masked tree sticking
out of the darkness much more prominently.  By default
both Enblend and Enfuse maximize the number of levels for
each overlapping region (see documentation for details).


** Changed in: enblend
       Status: In Progress => Fix Committed

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https://bugs.launchpad.net/bugs/1649122

Title:
  Enfuse brightness mismatch in deghosted area

Status in Enblend:
  Fix Committed

Bug description:
  Enfuse results in a brightness mismatch of dark deghosted areas when
  exposure-mu is decreased from its default value.

  Program Version:
  - enfuse 4.1.3 (could not compile 4.2)

  Platforms:
  - Debian Jessie
  - OS X 10.11.6 via MacPorts

  
  == Testcase Files ==

  https://www.dropbox.com/sh/8la13xukmfamjk5/AACI6mruatMEsZ27wZgl8ysha?dl=0

  Bracketed exposures:
  161022_tc2_7079.tif - RGBA
  161022_tc2_7081.tif - RGBA
  161022_tc2_7083.tif - RGBA
  161022_tc2_7085.tif - RGBA
  161022_tc2_7086.tif - RGB

  Enfused results:
  161022_mu00.tif - exposure-mu=0.0
  161022_mu02.tif - exposure-mu=0.2
  161022_mu05.tif - exposure-mu=0.5 (default)

  Commands to reproduce:
  $ enfuse --exposure-mu=0.0 -o 161022_mu00.tif 161022_tc2_70??.tif
  $ enfuse --exposure-mu=0.2 -o 161022_mu02.tif 161022_tc2_70??.tif
  $ enfuse --exposure-mu=0.5 -o 161022_mu05.tif 161022_tc2_70??.tif

  
  == Detailed Description ==

  Deghosting;
  All exposures except the lightest one (..7086) share the same alpha channel which masks a dark area in the middle of the image for deghosting of moving leaves. The masking is binary, there are no partially masked pixels.

  When I change the exposure-mu parameter from its default 0.5 to a
  smaller value to darken the image, the deghosted area stays much
  lighter than its surroundings. The problem does not occur when
  deghosting a bright area using pixels from a dark exposure.

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