sgitopnm

Convert an SGI file to a PNM file. More information: https://netpbm.sourceforge.net/doc/sgitopnm.html.

• Convert an SGI image to a PNM file:

sgitopnm path/to/input.sgi > path/to/output.pnm

• Display information about the SGI file:

sgitopnm -verbose path/to/input.sgi > path/to/output.pnm

• Extract channel n of the SGI file:

sgitopnm -channel n path/to/input.sgi > path/to/output.pnm