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

# ppmdim(1)

dim a PPM image

## NAME

ppmdim - dim a PPM image

## SYNOPSIS

ppmdim *dimfactor* \[*ppmfile*\]

## DESCRIPTION

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

This program is largely obsoleted by the more general [**pamfunc**(1)](/pamfunc/1.md)  (use the **-multiplier** option).  **ppmdim** remains for backward compatibility and also because its use of integer arithmetic may make it faster.

**ppmdim** reads a PPM image input and diminishes its brightness by the specified dimfactor.  The dimfactor may be in the range from 0.0 (total blackness, deep night, nada, null, nothing) to 1.0 (original picture's brightness).

## OPTIONS

There are no command line options defined specifically for **ppmdim**, but it recognizes the options common to all programs based on libnetpbm (See \
  Common Options ⟨index.html#commonoptions⟩ .)

## SEE ALSO

**ppm**(1) , [**pamfunc**(1)](/pamfunc/1.md) ,

## AUTHOR

Copyright (C) 1993 by Frank Neumann

## 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/ppmdim.html**