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## Zerocrossings in an image

**From**: |
Søren Hauberg |

**Subject**: |
Zerocrossings in an image |

**Date**: |
Sun, 17 Apr 2005 18:02:02 +0200 |

**User-agent**: |
Mozilla Thunderbird 1.0.2 (X11/20050404) |

Hi

`Does anybody here know a simple way to find the zerocrossings in an
``image in Octave?
`I usually do something like this (where f is the image (or 2d function))
zerocrossings = bwmorph(f>=0, "remove");

`but then I depend on bwmorph which only is octave-forge (which I don't
``have at school).
`
Any help would be great,
\Søren
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**Zerocrossings in an image**,
*Søren Hauberg* **<=**