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
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