snippetbashTip

pgmkernel — Generate a convolution kernel to be used with `pnmconvol`. See also: `pnmconvol`. More information:

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

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commandpgmkernelusedcliwithconvolutiongeneratekernel

Problem

How to use the pgmkernel command: Generate a convolution kernel to be used with pnmconvol. See also: pnmconvol. More information: <https://netpbm.sourceforge.net/doc/pgmkernel.html>.

Solution

pgmkernel — Generate a convolution kernel to be used with pnmconvol. See also: pnmconvol. More information: <https://netpbm.sourceforge.net/doc/pgmkernel.html>.

Generate a convolution kernel:

pgmkernel {{width}} {{height}} > {{path/to/output.pgm}}

Generate a quadratic convolution kernel:

pgmkernel {{size}} > {{path/to/output.pgm}}

Specify the weight of the center in the generated kernel:

pgmkernel {{[-w|-weight]}} {{value}} {{width}} {{height}} > {{path/to/output.pgm}}

Code Snippets

Generate a convolution kernel

pgmkernel {{width}} {{height}} > {{path/to/output.pgm}}

Generate a quadratic convolution kernel

pgmkernel {{size}} > {{path/to/output.pgm}}

Specify the weight of the center in the generated kernel

pgmkernel {{[-w|-weight]}} {{value}} {{width}} {{height}} > {{path/to/output.pgm}}

Context

tldr-pages: common/pgmkernel

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