I got this from someone who got it off DA a LONG time ago, but it's a very valuable procedure I think should be posted.
REMOVING HAND DRAWN LINEART DIGITALLY FROM IT'S BACKGROUND
1. Open scanned pen and ink drawing into PHOTOSHOP
2. jack up the contrast (don't forget to clean spots and smudges)
3. make 2 new layers
- transparent
- image
- white background
4. select all -> Lineart layer
5. Copy the selection
6. go to Channels -> make a new channel “Alpha 1”
7. go to Channel Options, make these changes
- Black fill color
- Selected areas
- Opacity 100%
8. Paste your selected line art into the new channel
9. "Command + click" on the new channel (you will see all the lines get highlited)
10. click on the Transparent layer
11. (alt) Option + Delete (this fills the selection in channels with black, and it is copied into the transparent layer)
12. Enjoy your transparent Lineart.
99 Problems and a Cat
Croi Desai vs. HR99
@ 12:30 AM Apr 23rd