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<feComponentTransfer>

Th <feComponentTransfer> SVG filter primitive performs color-component-wise remapping of data for each pixel. It allows operations like brightness adjustment, contrast adjustment, color balance or thresholding.

The calculations are performed on non-premultiplied color values. The colors are modified by changing each channel (R, G, B, and A) to the result of what the children <feFuncR>, <feFuncB>, <feFuncG>, and <feFuncA> return.

Usage context

Categories	Filter primitive element
Permitted content	Any number of the following elements, in any order: `<feFuncA>`, `<feFuncR>`, `<feFuncB>`, `<feFuncG>`

Attributes

Global attributes

Specific attributes

in

DOM Interface

This element implements the SVGFEComponentTransferElement interface.

Example

SVG

<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 600 300">
  <defs>
    <linearGradient id="rainbow" gradientUnits="userSpaceOnUse" x1="0" y1="0" x2="100%" y2="0">
      <stop offset="0" stop-color="#ff0000"></stop>
      <stop offset="0.2" stop-color="#ffff00"></stop>
      <stop offset="0.4" stop-color="#00ff00"></stop>
      <stop offset="0.6" stop-color="#00ffff"></stop>
      <stop offset="0.8" stop-color="#0000ff"></stop>
      <stop offset="1" stop-color="#800080"></stop>
    </linearGradient>
    <filter id="identity" x="0" y="0" width="100%" height="100%">
      <feComponentTransfer>
        <feFuncR type="identity"></feFuncR>
        <feFuncG type="identity"></feFuncG>
        <feFuncB type="identity"></feFuncB>
        <feFuncA type="identity"></feFuncA>
      </feComponentTransfer>
    </filter>
    <filter id="table" x="0" y="0" width="100%" height="100%">
      <feComponentTransfer>
        <feFuncR type="table" tableValues="0 0 1 1"></feFuncR>
        <feFuncG type="table" tableValues="1 1 0 0"></feFuncG>
        <feFuncB type="table" tableValues="0 1 1 0"></feFuncB>
      </feComponentTransfer>
    </filter>
    <filter id="linear" x="0" y="0" width="100%" height="100%">
      <feComponentTransfer>
        <feFuncR type="linear" slope="0.5" intercept="0"></feFuncR>
        <feFuncG type="linear" slope="0.5" intercept="0.25"></feFuncG>
        <feFuncB type="linear" slope="0.5" intercept="0.5"></feFuncB>
      </feComponentTransfer>
    </filter>
    <filter id="gamma" x="0" y="0" width="100%" height="100%">
      <feComponentTransfer>
        <feFuncR type="gamma" amplitude="4" exponent="7" offset="0"></feFuncR>
        <feFuncG type="gamma" amplitude="4" exponent="4" offset="0"></feFuncG>
        <feFuncB type="gamma" amplitude="4" exponent="1" offset="0"></feFuncB>
      </feComponentTransfer>
    </filter>
  </defs>

  <g font-weight="bold">
    <text x="0" y="5%">Default</text>
    <rect x="0" y="8%" width="100%" height="20"></rect>
    <text x="0" y="26%">Identity</text>
    <rect x="0" y="29%" width="100%" height="20" style="filter:url(#identity)"></rect>
    <text x="0" y="47%">Table lookup</text>
    <rect x="0" y="50%" width="100%" height="20" style="filter:url(#table)"></rect>
    <text x="0" y="68%">Linear function</text>
    <rect x="0" y="71%" width="100%" height="20" style="filter:url(#linear)"></rect>
    <text x="0" y="89%">Gamma function</text>
    <rect x="0" y="92%" width="100%" height="20" style="filter:url(#gamma)"></rect>
  </g>
</svg>

CSS

rect {
  fill: url(#rainbow);
}

Result

Specifications

Specification	Status	Comment
Filter Effects Module Level 1 The definition of '<feComponentTransfer>' in that specification.	Working Draft	Specified that missing transfer function elements are treated like they were specified with their `type` attributes set to `identity`.
Scalable Vector Graphics (SVG) 1.1 (Second Edition) The definition of '<feComponentTransfer>' in that specification.	Recommendation	Initial definition

Browser compatibilityUpdate compatibility data on GitHub

	Desktop
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari
Basic support	Yes	Yes	Yes	Yes	Yes	?
`in`	Yes	Yes	Yes	Yes	Yes	?

	Mobile
	Android webview	Chrome for Android	Edge Mobile	Firefox for Android	Opera for Android	iOS Safari	Samsung Internet
Basic support	?	Yes	Yes	Yes	?	?	?
`in`	?	Yes	Yes	Yes	?	?	?