Posted: 2006-12-28T08:29:18-07:00
Add -sampling-factor 1x1 to your command line to force a 1,1 horizontal and vertical sampling factor.
Use https://github.com/ImageMagick/ImageMagick/discussions instead.
http://mirror.imagemagick.org/discourse-server/
http://mirror.imagemagick.org/discourse-server/viewtopic.php?t=8087