ppmrelief1

Usage

Overview

This program is part of Netpbm(1) .

ppmrelief reads a PPM image as input, and writes a relief of that image as a PPM image as output.

The relief process is described in "Beyond Photography" by Holzmann, equation 3.19. It's a sort of edge-detection and is essentially a convolution with this matrix:

<span style="font-family: monospace">
    |  1  0  0 |
    |  0  0  0 |
    |  0  0 -1 |
</span>

Options

There are no command line options defined specifically for ppmrelief, 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/ppmrelief.html