pnmmontage
Create a montage from multiple PNM images.
TLDR
Produce a packing of the specified images
$ pnmmontage [path/to/image1.pnm path/to/image2.pnm ...] > [path/to/output.pnm]
Specify the quality of the packing (Note: larger values produce smaller packings but take longer to compute.)
$ pnmmontage -[0..9] [path/to/image1.pnm path/to/image2.pnm ...] > [path/to/output.pnm]
Produce a packing that is not larger than p percent of the optimal packing
$ pnmmontage -quality [p] [path/to/image1.pnm path/to/image2.pnm ...] > [path/to/output.pnm]
Write the positions of the input files within the packed image to a machine-readable file
$ pnmmontage -data [path/to/datafile] [path/to/image1.pnm path/to/image2.pnm ...] > [path/to/output.pnm]
