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Collage images with blend
Posted: 2018-10-01T05:33:02-07:00
by dognose
Hi All,
I'm looking to do a 2x2 collage with overlapping / blended edges.
I can't figure out an easy way to do the overlap / blend part. Any suggestions?
Re: Collage images with blend
Posted: 2018-10-01T06:15:09-07:00
by snibgo
Blending can be done with a masked "-compose Over -composite". For example, blending horizontally between x=120 and x=180, with a linear blend (Windows syntax):
Code: Select all
magick ^
toes.png ^
( toes.png -negate ) ^
( +clone -sparse-color bilinear "120,0,White 180,0,Black" ) ^
-compose Over -composite ^
blnd_neg.jpg
See
Blending pyramids for some other blending techniques.
Instead of blending, we can make a jagged cut that is the line of least difference between the images:
Code: Select all
magick ^
toes.png ^
( toes.png -negate ) ^
( -clone 0-1 ^
-compose Difference -composite ^
-process darkestpath ^
-fill White -draw "color 0,0,floodfill"
) ^
-compose Over -composite ^
blnd_neg2.jpg
See
Dark paths for more detail.