CmdID / Commands
sgitopnm
Convert an SGI file to a PNM file. tldr-pages
On several platforms
Convert an SGI image to a PNM file
sgitopnm path/to/input.sgi >path/to/output.pnmIdentify
Display information about the SGI file
sgitopnm -verbose path/to/input.sgi >path/to/output.pnmIdentify
Extract channel n of the SGI file
sgitopnm -channel n path/to/input.sgi >path/to/output.pnmIdentify