pnmtops
Convert a PNM image to a PostScript file.
TLDR
Convert a PNM image to a PS file
$ pnmtops [path/to/file.pnm] > [path/to/file.ps]
Specify the dimensions of the output image in inches
$ pnmtops -imagewidth [imagewidth] -imageheight [imageheight] [path/to/file.pnm] > [path/to/file.ps]
Specify the dimensions of the page the output image resides on in inches
$ pnmtops -width [width] -height [height] [path/to/file.pnm] > [path/to/file.ps]
