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tldr/pages/common/pnmhisteq.md
Juri Dispan ac7152950e
pnmhisteq, pnmhistmap, pnmindex, pnminvert: add pages (#12189) 
* pnmhisteq, pnmhistmap, pnmindex, pnminvert: add pages

* Update pages/common/pnmindex.md

Co-authored-by: K.B.Dharun Krishna <kbdharunkrishna@gmail.com>

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Co-authored-by: K.B.Dharun Krishna <kbdharunkrishna@gmail.com>
2024-02-06 16:43:21 +01:00

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pnmhisteq

Histogram-equalize a PNM image. More information: https://netpbm.sourceforge.net/doc/pnmhisteq.html.

  • Increase the contrast of a PNM image using histogram equalization:

pnmhisteq {{path/to/input.pnm}} > {{path/to/output.pnm}}

  • Only modify grey pixels:

pnmhisteq -grey {{path/to/input.pnm}} > {{path/to/output.pnm}}

  • Do not include black or white pixels in the histogram equalization:

pnmhisteq -no{{black|white}} {{path/to/input.pnm}} > {{path/to/output.pnm}}