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[tmodes <679977@xxxxxxxxxxxxxxxxxx>]

Implemented in changeset 911dd9fbf894.
Needs some testing.

** Changed in: hugin
       Status: Triaged => Fix Committed

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https://bugs.launchpad.net/bugs/679977

Title:
  Add support for EXIF colour balance data

Status in Hugin - Panorama Tools GUI:
  Fix Committed

Bug description:
  (This is a short project suitable for an initial Hugin patch)

  Hugin currently reads photo EXIF metadata for aperture, shutterspeed
  and ISO setting, it uses this to initialise the EV parameter for each
  photo, this is useful for bracketed sets and for situations where the
  camera was set to 'auto-exposure'. It then sets a global project-wide
  EV parameter to the average of all these EV settings.

  Something similar can be done for colour-balance EXIF metadata,
  however Hugin doesn't have (or need) a global colour balance setting.

  Hugin should be patched to read the EXIF WBRedLevel and WBBlueLevel
  for input photos, these are unitless and can be used as scale factors
  for the Er and Eb parameters for each photo. Since Hugin doesn't have
  a global colour balance setting, the Er and Eb parameters need to be
  each scaled relative to the average WBRedLevel and WBBlueLevel of all
  photos in the project.

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