pbmreduce
Proportionally reduce a PBM image.
TLDR
Reduce the specified image by the specified factor
$ pbmreduce [N] [path/to/image.pbm] > [path/to/output.pbm]
Use simple thresholding when reducing
$ pbmreduce -threshold [N] [path/to/image.pbm] > [path/to/output.pbm]
Use the specified threshold for all quantizations
$ pbmreduce -value [0.6] [N] [path/to/image.pbm] > [path/to/output.pbm]
