stdDeviation

The stdDeviation attribute defines the standard deviation for the blur operation.

You can use this attribute with the following SVG elements:

{{SVGElement("feDropShadow")}}
{{SVGElement("feGaussianBlur")}}

Example

css

html,
body,
svg {
  height: 100%;
}

html

<svg viewBox="0 0 480 200" xmlns="http://www.w3.org/2000/svg">
  <filter id="gaussianBlur1">
    <feGaussianBlur stdDeviation="1" />
  </filter>
  <filter id="gaussianBlur2">
    <feGaussianBlur stdDeviation="5" />
  </filter>
  <filter id="gaussianBlur3" x="-30%" y="-30%" width="160%" height="160%">
    <feGaussianBlur stdDeviation="10" />
  </filter>

  <circle cx="100" cy="100" r="50" filter="url(#gaussianBlur1)" />
  <circle cx="240" cy="100" r="50" filter="url(#gaussianBlur2)" />
  <circle cx="380" cy="100" r="50" filter="url(#gaussianBlur3)" />
</svg>

Usage notes

<table class="properties"> <tbody> <tr> <th scope="row">Value</th> <td> <code ><a href="/en-US/docs/Web/SVG/Guides/Content_type#number-optional-number" ><number-optional-number></a ></code > </td> </tr> <tr> <th scope="row">Default value</th> <td><code>0</code></td> </tr> <tr> <th scope="row">Animatable</th> <td>Yes</td> </tr> </tbody> </table>

<number-optional-number>
- : If two numbers are provided, the first number represents a standard deviation value along the x-axis. The second value represents a standard deviation along the y-axis. If one number is provided, then that value is used for both X and Y.
  
  A negative value is forbidden. A value of zero disables the effect of the given filter primitive (i.e., the result is the filter input image). If stdDeviation is 0 in only one of X or Y, then the effect is that the blur is only applied in the direction that has a non-zero value.

Example

Usage notes

Specifications

Browser compatibility