pbmmake

Create a blank bitmap. More information: https://netpbm.sourceforge.net/doc/pbmmake.html.

• Create a blank bitmap of the specified dimensions:

pbmmake {{width}} {{height}} > {{path/to/output_file.pbm}}

• Specify the color of the created bitmap:

pbmmake -{{white|black|grey}} {{width}} {{height}} > {{path/to/output_file.pbm}}