pbmreduce
Proportionally reduce a PBM image. tldr-pages
On several platforms
Several platforms
Reduce the specified image by the specified factor
pbmreduce n path/to/image.pbm >path/to/output.pbmIdentifyUse simple thresholding when reducing
pbmreduce -threshold n path/to/image.pbm >path/to/output.pbmIdentifyUse the specified threshold for all quantizations
pbmreduce -value 0.6 n path/to/image.pbm >path/to/output.pbmIdentify