pnmtoddif

Convert a PNM image to a DDIF image file. More information: https://netpbm.sourceforge.net/doc/pnmtoddif.html.

• Convert a PNM image to a DDIF image file:

pnmtoddif {{path/to/image.pnm}} > {{path/to/image.ddif}}

• Explicitly specify the horizontal and vertical resolution of the output image:

pnmtoddif -resolution {{horizontal_dpi}} {{vertical_dpi}} {{path/to/image.pnm}} > {{path/to/image.ddif}}