---
syntax: markdown
tags: [tldr, common]
source: https://github.com/tldr-pages/tldr.git
---
# pbmreduce

> Proportionally reduce a PBM image.
> See also: `pamenlarge`, `pamditherbw`.
> More information: <https://netpbm.sourceforge.net/doc/pbmreduce.html>.

- Reduce the specified image by the specified factor:

`pbmreduce {{N}} {{path/to/image.pbm}} > {{path/to/output.pbm}}`

- Use simple thresholding when reducing:

`pbmreduce -threshold {{N}} {{path/to/image.pbm}} > {{path/to/output.pbm}}`

- Use the specified threshold for all quantizations:

`pbmreduce -value {{0.6}} {{N}} {{path/to/image.pbm}} > {{path/to/output.pbm}}`
