Legacy ImageMagick Discussions Archive

Hello to all,
is there any way to enhance pencil sketch like this ? :

http://static.repubblica.it/laprovincia ... gio/01.JPG

i'ive many sketch to publish on paper but quality is very low.

I'm searching the way to contrast black.

thank yuo for any help.

m.

try -auto-level or -contrast-stretch

convert 01.JPG -auto-level result1.jpg

the above may not be enough. If that is the case then try

convert 01.JPG -contrast-stretch XX% result2.jpg

where XX is some percent. I tried 1%, but you may want more or less.


see http://www.imagemagick.org/Usage/color_mods/ for more details on various types of contrast and brightness changes.