hugin-devs team mailing list archive

[Bruno Postle <706407@xxxxxxxxxxxxxxxxxx>]

Can you try again with the photometric and vignetting parameters all set
to zero?

i.e. you have these parameters set, but it isn't clear where they came
from - Since there is only one photo in your project and Hugin requires
more than one photo to calculate them:

 Ra-5.59180021286011
 Rb-1.79410994052887
 Rc0.725331008434296
 Rd-0.775731027126312
 Re0.724507987499237
 Vb-0.0167482
 Vc-0.363532
 Vd0.162268

You should get acceptable results with them all set to 0.0

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https://bugs.launchpad.net/bugs/706407

Title:
  Remapping creates color bands in gradients

Status in Hugin - Panorama Tools GUI:
  New

Bug description:
  The nona component of Hugin introduces color banding artifacts while
  remapping images. Smooth gradients in the source image show as jagged
  bands in the remapped image.

  Here's a typical example, remapping a single fisheye image into Panini General:
    Source image: http://tau.ac.il/~tromer/misc/hugin-banding-bug/TEST.JPG
    Hugin project: http://tau.ac.il/~tromer/misc/hugin-banding-bug/TEST-panini.pto (attached)
    Result image: http://tau.ac.il/~tromer/misc/hugin-banding-bug/TEST-panini.jpg

  Look at the sky in the top right corner. It's smooth in the source, but badly banded and jagged in the result.
  (Please ignore the pixelated blob on the left, it's blurred for privacy.)

  The above happens with current hugin hg and libpano13 svn, as well as
  Fedora 14's packaged versions. The artifact does not seem
  significantly affected by the choice of projection or by the nona
  interpolation mode set in Hugin.