The Intensity variants of Lighten and Darken as now been added to the SVN, and will be published in IM v6.6.9-5
Examples of its use are in IM Usage (which takes longer to update than the actual coding).
http://www.imagemagick.org/Usage/compos ... _intensity
It has two modes of operation, a default 'alpha-weighted intensity' whole pixel selection mode,
or a 'no-weighting' mode but allowing you to just transfer specific (or 'ALL') channels.
That second mode makes it relatively easy to generate a 'shaped mask' using alpha channel coping, if a mask is all you want.
You could even use it as a funny type of "Select this alpha on this, otherwise select that alpha" type of selection.
I am still looking for a more formal definition of "Lighten by Intensity", as it is not covered by the normal SVG or Photoshop definitions I use for composition methods.
Announcements pertaining to ImageMagick, or ImageMagick related software. This list is moderated. No discussions here, instead post to the users group instead.
1 post • Page 1 of 1
- Posts: 8881
- Joined: 2004-05-31T19:27:03-07:00
- Authentication code: 8675308
- Location: Brisbane, Australia
Anthony Thyssen -- Webmaster for ImageMagick Example Pages