Recently there's been a lot of excitement in the digital camera world
among former B&W film afficianodos who are simulating the use of colored
filters by manipulating color channels prior to converting a digital
image to greyscale.
Photoshop has a feature that lets you weight color channels when
you recompose them.
In Gimp, you can decompose color channels by:
Image->Color->Decompose
and then later:
Image->Color->Compose
I understand the function of weighting the channels is not there.
Is there some combination of existing functions that would let
you re-compose an image as:
0% red, 50% green, 50% blue (i.e., a red-blocking filter)
Is there some way to use blending of layers and opacity to do
this? Or some other tools or scripts?
