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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>
8 lines
225 B
Markdown
8 lines
225 B
Markdown
# pnminvert
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> Invert a PNM image.
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> More information: <https://netpbm.sourceforge.net/doc/pnminvert.html>.
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- Invert the colors or greyscale values in a PNM image:
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`pnminvert {{path/to/input.pnm}} > {{path/to/output.pnm}}`
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