pbmtobbnbg
Convert a PBM image to a BitGraph graphic.
TLDR
Convert a PBM image to a BitGraph terminal Display Pixel Data sequence
$ pbmtobbnbg < [path/to/image.pbm] > [path/to/output.dpd]
Specify the rasterop
$ pbmtobbnbg [3] < [path/to/image.pbm] > [path/to/output.dpd]