baseFrequency
SVG Elements
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<feBlend>
<feColorMatrix>
<feComponentTransfer>
<feComposite>
<feConvolveMatrix>
<feDiffuseLighting>
<feDisplacementMap>
<feDistantLight>
<feFlood>
<feFuncA>
<feFuncB>
<feFuncG>
<feFuncR>
<feGaussianBlur>
<feImage>
<feMerge>
<feMergeNode>
<feMorphology>
<feOffset>
<fePointLight>
<feSpecularLighting>
<feSpotLight>
<feTile>
<feTurbulence>
<filter>
<font>
<font-face>
<font-face-format>
<font-face-name>
<font-face-src>
<font-face-uri>
<foreignObject>
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The baseFrequency
attribute represents the base frequency parameter for the noise function of the <feTurbulence>
filter primitive.
You can use this attribute with the following SVG elements:
Example
<svg viewBox="0 0 420 200" xmlns="http://www.w3.org/2000/svg">
<filter id="noise1" x="0" y="0" width="100%" height="100%">
<feTurbulence baseFrequency="0.025" />
</filter>
<filter id="noise2" x="0" y="0" width="100%" height="100%">
<feTurbulence baseFrequency="0.05" />
</filter>
<rect x="0" y="0" width="200" height="200" style="filter: url(#noise1);" />
<rect x="0" y="0" width="200" height="200" style="filter: url(#noise2); transform: translateX(220px);" />
</svg>
Usage notes
Value | <number-optional-number> |
---|---|
Default value | 0 |
Animatable | Yes |
<number-optional-number>
-
If two numbers are provided, the first one represents the base frequency in the horizontal direction and the second one the base frequency in the vertical direction. If one number is provided, then that value is used for both x and y.
Negative values are forbidden.
Example
<svg width="200" height="200" viewBox="0 0 220 220"
xmlns="http://www.w3.org/2000/svg">
<filter id="displacementFilter">
<feTurbulence type="turbulence" baseFrequency="0.05"
numOctaves="2" result="turbulence"/>
<feDisplacementMap in2="turbulence" in="SourceGraphic"
scale="50" xChannelSelector="R" yChannelSelector="G"/>
</filter>
<circle cx="100" cy="100" r="100"
style="filter: url(#displacementFilter)"/>
</svg>
Specifications
Specification | Status | Comment |
---|---|---|
Filter Effects Module Level 1 The definition of 'baseFrequency' in that specification. |
Working Draft | No change |
Scalable Vector Graphics (SVG) 1.1 (Second Edition) The definition of 'baseFrequency' in that specification. |
Recommendation | Initial definition |
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