[magick-users] RE: Merging greyscales into an RGB

[Fred Weinhaus]

I am not too familiar with PNM image, but try

convert \( image1.pnm -channel red -separate \)  \( image2.pnm 
-channel red -separate \)  \( image3.png -channel red -separate \) 
-combine result.tiff

or if there is truly only one channel (not likely with IM files  - 
grayscale images typically have 3 channels), try

convert image1.pnm image2.pnm imag3.pnm -combine result.tiff

or if you need to force 3 channels before separating, try

convert \( image1.pnm -colorspace RGB -channel red -separate \)  \( 
image2.pnm -colorspace RGB -channel red -separate \)  \( image3.png 
-colorspace RGB -channel red -separate \) -combine result.tiff


see

http://www.imagemagick.org/Usage/channels/



>Hello,
>
>This is my first post on the imagemagick mailing list as I begin to use it
>for personal research...
>
>I would like to know if there is a way to merge 3 different greyscale images
>into a single RGB image...
>
>I cannot figure out if this should be done or not by the convert command
>(options -adjoin or -coalesce )
>
>My greyscale images are in PNM format (but I could also have them as TIFFs )
>
>Can anyone point me out the right command?
>
>Best regards
>
>--
>Mattia