<feMorphology>

The <feMorphology> SVG filter primitive is used to erode or dilate the input image. It's usefulness lies especially in fattening or thinning effects.

Usage context

CategoriesFilter primitive element
Permitted contentAny number of the following elements, in any order:
<animate>, <set>

Attributes

Global attributes

Specific attributes

DOM Interface

This element implements the SVGFEMorphologyElement interface.

Filtering SVG content

SVG

<svg xmlns="http://www.w3.org/2000/svg" width="300" height="180">
  <filter id="erode">
    <feMorphology operator="erode" radius="1"/>
  </filter>
  <filter id="dilate">
    <feMorphology operator="dilate" radius="2"/>
  </filter>
  <text y="1em">Normal text</text>
  <text id="thin" y="2em">Thinned text</text>
  <text id="thick" y="3em">Fattened text</text>
</svg>

CSS

text {
  font-family: Arial, Helvetica, sans-serif;
  font-size: 3em;
}

#thin {
  filter: url(#erode);
}

#thick {
  filter: url(#dilate);
}

Filtering HTML content

SVG

<svg xmlns="http://www.w3.org/2000/svg" width="0" height="0">
  <filter id="erode">
    <feMorphology operator="erode" radius="1"/>
  </filter>
  <filter id="dilate">
    <feMorphology operator="dilate" radius="2"/>
  </filter>
</svg>

<p>Normal text</p>
<p id="thin">Thinned text</p>
<p id="thick">Fattened text</p>

CSS

p {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  font-size: 3em;
}

#thin {
  filter: url(#erode);
}

#thick {
  filter: url(#dilate);
}

Specifications

Specification Status Comment
Filter Effects Module Level 1
The definition of '<feMorphology>' in that specification.
Working Draft No change
Scalable Vector Graphics (SVG) 1.1 (Second Edition)
The definition of '<feMorphology>' in that specification.
Recommendation Initial definition

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support (Yes) 4.0 (2.0) (Yes) 9.0 ?
On HTML elements No support (Yes) No support No support ?
Feature Android Firefox Mobile (Gecko) IE Phone Opera Mobile Safari Mobile
Basic support ? ? ? ? ?
On HTML elements ? ? ? ? ?

The chart is based on these sources.

See also

Document Tags and Contributors

 Contributors to this page: Sebastianz, iwarui, kscarfone, Jeremie, Manuel_Strehl
 Last updated by: Sebastianz,