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Fix incorrect writing of grayscale JPEG images (bugs #41673, #44118, #42474) * __magick_read__.cc: when writing grayscale images, we should create a Magick::Image object of Magick::GrayscaleType type, then use Magick::Color with only the red channel set (the other channels would be ignored). However, this seems to not work for JPEG images which would then generate grayscale images with one third of the intensity. This fixes it.
author Ilya Kurdyukov <olme8@mail.ru>
date Wed, 11 Feb 2015 17:40:04 +0000
parents a6d13c62fccf
children f5d9e57d4380
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To cite GNU Octave in publications use:

  John W. Eaton, David Bateman, Søren Hauberg, Rik Wehbring (2014).
  GNU Octave version 3.8.1 manual: a high-level interactive language for
  numerical computations.
  CreateSpace Independent Publishing Platform.  ISBN 1441413006,
  URL http://www.gnu.org/software/octave/doc/interpreter/

A BibTeX entry for LaTeX users is:

  @book{,
    author    = {John W. Eaton, David Bateman, S\oren Hauberg, and Rik Wehbring},
    title     = {{GNU Octave} version 3.8.1 manual: a high-level interactive language for numerical computations},
    publisher = {CreateSpace Independent Publishing Platform},
    year      = {2014},
    note      = {{ISBN} 1441413006},
    url       = {http://www.gnu.org/software/octave/doc/interpreter},
  }

We have invested a lot of time and effort in creating GNU Octave, please cite it
when using it.  See also `citation pkgname' for citing Octave packages.