The <feGaussianBlur> SVG filter primitive blurs the input image by the amount specified in {{SVGAttr("stdDeviation")}} , which defines the bell-curve.

Like other filter primitives, it handles color components in the linearRGB {{glossary("color space")}}  by default. You can use {{svgattr("color-interpolation-filters")}}  to use sRGB instead.

Usage context

{{svginfo}} 

Attributes

• {{SVGAttr("in")}} 
• {{SVGAttr("stdDeviation")}} 
• {{SVGAttr("edgeMode")}} 
• Filter primitive attributes: {{SVGAttr("x")}} , {{SVGAttr("y")}} , {{SVGAttr("width")}} , {{SVGAttr("height")}} , {{SVGAttr("result")}} 

DOM Interface

This element implements the {{domxref("SVGFEGaussianBlurElement")}}  interface.

Example

Basic example

SVG

<svg
  width="230"
  height="120"
  xmlns="http://www.w3.org/2000/svg"
  xmlns:xlink="http://www.w3.org/1999/xlink">
  <filter id="blurMe">
    <feGaussianBlur in="SourceGraphic" stdDeviation="5" />
  </filter>

  <circle cx="60" cy="60" r="50" fill="green" />

  <circle cx="170" cy="60" r="50" fill="green" filter="url(#blurMe)" />
</svg>

Result

{{EmbedLiveSample("Basic_example", "", "130")}} 

Drop shadow example

SVG

<svg
  width="120"
  height="120"
  xmlns="http://www.w3.org/2000/svg"
  xmlns:xlink="http://www.w3.org/1999/xlink">
  <filter id="dropShadow">
    <feGaussianBlur in="SourceAlpha" stdDeviation="3" />
    <feOffset dx="2" dy="4" />
    <feMerge>
      <feMergeNode />
      <feMergeNode in="SourceGraphic" />
    </feMerge>
  </filter>

  <circle cx="60" cy="60" r="50" fill="green" filter="url(#dropShadow)" />
</svg>

Result

{{EmbedLiveSample("Drop_shadow_example", "", "130")}} 

Specifications

{{Specifications}} 

Browser compatibility

{{Compat}} 

See also

• SVG Filter primitive attributes
• {{SVGElement("filter")}} 
• {{SVGElement("feBlend")}} 
• {{SVGElement("feColorMatrix")}} 
• {{SVGElement("feComponentTransfer")}} 
• {{SVGElement("feComposite")}} 
• {{SVGElement("feConvolveMatrix")}} 
• {{SVGElement("feDiffuseLighting")}} 
• {{SVGElement("feDisplacementMap")}} 
• {{SVGElement("feFlood")}} 
• {{SVGElement("feImage")}} 
• {{SVGElement("feMerge")}} 
• {{SVGElement("feMorphology")}} 
• {{SVGElement("feOffset")}} 
• {{SVGElement("feSpecularLighting")}} 
• {{SVGElement("feTile")}} 
• {{SVGElement("feTurbulence")}} 
• SVG tutorial: Filter effects