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* pnmhisteq, pnmhistmap, pnmindex, pnminvert: add pages * Update pages/common/pnmindex.md Co-authored-by: K.B.Dharun Krishna <kbdharunkrishna@gmail.com> --------- Co-authored-by: K.B.Dharun Krishna <kbdharunkrishna@gmail.com>
16 lines
482 B
Markdown
16 lines
482 B
Markdown
# pnmhistmap
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> Draw a histogram of a PNM image.
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> More information: <https://netpbm.sourceforge.net/doc/pnmhistmap.html>.
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- Draw a histogram of a PNM image:
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`pnmhistmap {{path/to/input.pnm}} > {{path/to/output.pnm}}`
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- Draw the histogram as dots instead of bars:
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`pnmhistmap -dots {{path/to/input.pnm}} > {{path/to/output.pnm}}`
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- Specify the range of intensity values to include:
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`pnmhistmap -lval {{minval}} -rval {{maxval}} {{path/to/input.pnm}} > {{path/to/output.pnm}}`
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