# phpman > man > sgitopnm(1) > **TLDR:** Convert an SGI file to a PNM file. > - Convert an SGI image to a PNM file: `sgitopnm {{path/to/input.sgi}} > {{path/to/output.pnm}}` - Display information about the SGI file: `sgitopnm {{-verb|-verbose}} {{path/to/input.sgi}} > {{path/to/output.pnm}}` - Extract channel n of the SGI file: `sgitopnm {{-c|-channel}} {{n}} {{path/to/input.sgi}} > {{path/to/output.pnm}}` *Source: tldr-pages* --- [sgitopnm(1)](https://www.chedong.com/phpMan.php/man/sgitopnm/1/markdown) General Commands Manual [sgitopnm(1)](https://www.chedong.com/phpMan.php/man/sgitopnm/1/markdown) ## NAME sgitopnm - convert a SGI image file to a portable anymap ## SYNOPSIS **sgitopnm** [**-verbose**] [**-channel** _c_] [_SGIfile_] ## DESCRIPTION Reads an SGI image file as input. Produces a PGM image for a 2-dimensional (1 channel) input file, and a PPM image for a 3-dimensional (3 or more channels) input file. Alternatively, produces a PGM image of any one of the channels in the input file. ## OPTIONS ### -verbose Give some information about the SGI image file. ### -channel Extract channel _c_ of the image as a PGM image. Without this option, **sgitopnm** extracts the first 3 channels as a PPM image or, if the input has only 1 channel, extracts that as a PGM image, and if the input has 2 channels, fails. ## REFERENCES SGI Image File Format documentation (draft v0.95) by Paul Haeberli (). Available via ftp at sgi.com:graphics/SGIIMAGESPEC. ## SEE ALSO [**pnm**(5)](https://www.chedong.com/phpMan.php/man/pnm/5/markdown), [**pnmtosgi**(1)](https://www.chedong.com/phpMan.php/man/pnmtosgi/1/markdown) ## AUTHOR Copyright (C) 1994 by Ingo Wilken () 29 Jul 2000 [sgitopnm(1)](https://www.chedong.com/phpMan.php/man/sgitopnm/1/markdown)