psidtopgm

Convert PostScript image data to a PGM image. More information: https://netpbm.sourceforge.net/doc/psidtopgm.html.

Convert the image data in a PS file to a PGM image of the specified dimensions and quality:

psidtopgm {{width}} {{height}} {{bits_per_sample}} {{path/to/file.ps}} > {{path/to/image.pgm}}