pnminvert1

Usage

Overview

This program is part of Netpbm(1) .

pnminvert reads a PNM image as input, inverts it black for white, and produces a PNM image as output.

If the image is grayscale, pnminvert replaces a pixel with one of complementary brightness, i.e. if the original pixel has gamma-adjusted gray value G, the output pixel has gray value maxval - G.

If the image is color, pnminvert inverts each individual RGB component the same as for a grayscale image.

Options

There are no command line options defined specifically for pnminvert, but it recognizes the options common to all programs based on libnetpbm (See
Common Options ⟨index.html#commonoptions⟩ .)

Document source

This manual page was generated by the Netpbm tool 'makeman' from HTML source. The master documentation is at

http://netpbm.sourceforge.net/doc/pnminvert.html