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31 lines
657 B
Plaintext
31 lines
657 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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# pgmhist
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> Print a histogram of the values present in a PGM image.
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> See also: `ppmhist`.
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> More information: <https://netpbm.sourceforge.net/doc/pgmhist.html>.
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- Display the histogram for human reading:
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`pgmhist {{path/to/image.pgm}}`
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- Display the median grey value:
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`pgmhist -median {{path/to/image.pgm}}`
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- Display four quartile grey value:
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`pgmhist -quartile {{path/to/image.pgm}}`
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- Report the existence of invalid grey values:
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`pgmhist -forensic {{path/to/image.pgm}}`
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- Display machine-readable output:
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`pgmhist -machine {{path/to/image.pgm}}`
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