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22 lines
677 B
Plaintext
22 lines
677 B
Plaintext
---
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syntax: markdown
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tags: [tldr, common]
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source: https://github.com/tldr-pages/tldr.git
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---
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# ppmdither
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> Reduce the number of colors in an image by applying dithering.
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> More information: <https://netpbm.sourceforge.net/doc/ppmdither.html>.
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- Read a PPM image, apply dithering, and save it to a file:
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`ppmdither {{path/to/image.ppm}} > {{path/to/file.ppm}}`
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- Specify the desired number of shades for each primary color:
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`ppmdither {{[-r|-red]}} {{2}} {{[-g|-green]}} {{3}} {{[-b|-blue]}} {{2}} {{path/to/image.ppm}} > {{path/to/file.ppm}}`
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- Specify the dimensions of the dithering matrix:
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`ppmdither {{[-d|-dim]}} {{2}} {{path/to/image.ppm}} > {{path/to/file.ppm}}`
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