---
name: "gemtopnm"
section: "1"
platform: "linux"
package: "netpbm"
version: "10.86.51-2"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/gemtopnm"
---

# gemtopnm(1)

convert a GEM .img file into a PNM image

## NAME

gemtopnm - convert a GEM .img file into a PNM image

## SYNOPSIS

**gemtopnm** \[**-debug**\] \[*gemfile*\]

## DESCRIPTION

This program is part of **Netpbm**(1) .

**gemtopnm** reads a GEM .img file, either the one plane (black/white) or four plane (16 color) varieety, as input and produces a PBM or PPM file as output, depending on whether the input is one or four plane.

The input file is *gemfile* if you specify that argument, or Standard Input otherwise.  Output is to Standard Output.

## OPTIONS

In addition to the options common to all programs based on libnetpbm (most notably **-quiet**, see \
  Common Options ⟨index.html#commonoptions⟩ ), **gemtopnm** recognizes the following command line option:

- **-debug**

  Produce output describing the contents of the .img file.

## SEE ALSO

[**pbmtogem**(1)](/pbmtogem/1.md) , **pnm**(1)

## AUTHOR

Copyright (C) 1988 Diomidis D. Spinellis (*dds@cc.ic.ac.uk*).

## DOCUMENT SOURCE

This manual page was generated by the Netpbm tool 'makeman' from HTML source.  The master documentation is at

-

  **http://netpbm.sourceforge.net/doc/gemtopnm.html**