Image composite mode: "grain merge"

[seanspotatobusiness]

The GIMP has a mode for overlaying images on each other called "grain merge". Does ImageMagick have an equivalent to this, perhaps named differently?

[snibgo]

According to http://docs.gimp.org/en/gimp-concepts-layer-modes.html , grain merge is out = in1 + in2 - 50%. So this may be equivalent:

Code: Select all

convert in1 in2 -compose Mathematics 0,1,1,-0.5 -composite out

EDIT: wrote "composite" instead of "compose".