Posted: 2006-04-27T07:13:08-07:00
We will add a sigmoidal contrast method for Magick++ to the next ImageMagick point release, scheduled for release within the next week or two.
Use https://github.com/ImageMagick/ImageMagick/discussions instead.
http://www.imagemagick.org/discourse-server/
http://www.imagemagick.org/discourse-server/viewtopic.php?t=6466