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17 lines
494 B
Markdown
17 lines
494 B
Markdown
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# pnmhisteq
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> Histogram-equalize a PNM image.
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> More information: <https://netpbm.sourceforge.net/doc/pnmhisteq.html>.
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- Increase the contrast of a PNM image using histogram equalization:
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`pnmhisteq {{path/to/input.pnm}} > {{path/to/output.pnm}}`
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- Only modify grey pixels:
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`pnmhisteq -grey {{path/to/input.pnm}} > {{path/to/output.pnm}}`
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- Do not include black or white pixels in the histogram equalization:
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`pnmhisteq -no{{black|white}} {{path/to/input.pnm}} > {{path/to/output.pnm}}`
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