pamdice
Slice a Netpbm image vertically or horizontally. tldr-pages
On several platforms
Several platforms
Slice a Netpbm image such that the resulting tiles have the specified height and width
pamdice -outstem path/to/filename_stem -height value -width value path/to/input.ppmIdentifyMake the produced pieces overlap by the specified amount horizontally and vertically
pamdice -outstem path/to/filename_stem -height value -width value -hoverlap value -voverlap value path/to/input.ppmIdentify