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filterUnits defines the coordinate system for the filter attributes x, y, width and height. If filterUnits="userSpaceOnUse", all attributes represent values in the current user coordinate system that is in place at the time when the filter is referenced.
If filterUnits="objectBoundingBox", then all attributes represent fractions or percentages of the bounding box on the referencing element.
If attribute filterUnits is not specified, then the effect is the same as specifying a value of objectBoundingBox.
Please see documentation on the filter element for more context and examples on how to use the filterUnits property.
This article contains content originally from external sources.
Portions of this content come from the Microsoft Developer Network: [Windows Internet Explorer API reference Article]