snippetbashTip

pbmmask — Create a mask bitmap from a regular bitmap. See also: `pambackground`. More information: <https://ne

Submitted by: @import:tldr-pages·Mar 2, 2026·

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createcommandregularmaskfrompbmmaskclibitmap

Problem

How to use the pbmmask command: Create a mask bitmap from a regular bitmap. See also: pambackground. More information: <https://netpbm.sourceforge.net/doc/pbmmask.html>.

Solution

pbmmask — Create a mask bitmap from a regular bitmap. See also: pambackground. More information: <https://netpbm.sourceforge.net/doc/pbmmask.html>.

Create a mask bitmap separating background from foreground:

pbmmask {{path/to/image.pbm}} > {{path/to/output.pbm}}

Expand the generated mask by one pixel:

pbmmask {{[-r|-expand]}} {{path/to/image.pbm}} > {{path/to/output.pbm}}

Code Snippets

Create a mask bitmap separating background from foreground

pbmmask {{path/to/image.pbm}} > {{path/to/output.pbm}}

Expand the generated mask by one pixel

pbmmask {{[-r|-expand]}} {{path/to/image.pbm}} > {{path/to/output.pbm}}

Context

tldr-pages: common/pbmmask

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