edgeMode

The edgeMode attribute determines how to extend the input image as necessary with color values so that the matrix operations can be applied when the kernel is positioned at or near the edge of the input image.

If attribute edgeMode is not specified, then the effect is as if a value of duplicate were specified.

Usage context

duplicate

It indicates that the input image is extended along each of its borders as necessary by duplicating the color values at the given edge of the input image.

wrap

It indicates that the input image is extended by taking the color values from the opposite edge of the image.

none

It indicates that the input image is extended with pixel values of zero for R, G, B and A.

Example

Elements

The following elements can use the edgeMode attribute

• <feConvolveMatrix>
• <feGaussianBlur>