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pamfunc — Apply a simple arithmetic function to a Netpbm image. More information: <https://netpbm.sourceforge.

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

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simplecommandarithmeticpamfuncfunctionapplyclinetpbm

Problem

How to use the pamfunc command: Apply a simple arithmetic function to a Netpbm image. More information: <https://netpbm.sourceforge.net/doc/pamfunc.html>.

Solution

pamfunc — Apply a simple arithmetic function to a Netpbm image. More information: <https://netpbm.sourceforge.net/doc/pamfunc.html>.

Apply the specified arithmetic function with n as the second argument to each sample in the specified PAM image:

pamfunc -{{multiplier|divisor|adder|subtractor|min|max}} {{n}} {{path/to/input.pam}} > {{path/to/output.pam}}

Apply the specified bit string function with n as the second argument to each sample in the specified PAM image:

pamfunc -{{andmask|ormask|xormask|shiftleft|shiftright}} {{n}} {{path/to/input.pam}} > {{path/to/output.pam}}

Code Snippets

Apply the specified arithmetic function with `n` as the second argument to each sample in the specified PAM image

pamfunc -{{multiplier|divisor|adder|subtractor|min|max}} {{n}} {{path/to/input.pam}} > {{path/to/output.pam}}

Apply the specified bit string function with `n` as the second argument to each sample in the specified PAM image

pamfunc -{{andmask|ormask|xormask|shiftleft|shiftright}} {{n}} {{path/to/input.pam}} > {{path/to/output.pam}}

Context

tldr-pages: common/pamfunc

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