Blur Node

Blur Node.

The Blur node blurs an image, providing several blur modes.

Inputs

Image

Standard color input.

Size

The optional Size input will be multiplied with the X and Y blur radius values. It also accepts a value image, to control the blur radius with a mask. The values should be mapped between (0 to 1) for an optimal effect.

Type

The difference between the types is in the way they handle sharp edges, smooth gradients and preserve the highs and the lows.

Flat:

Simply blurs everything uniformly.

Tent:

Preserves the high and the lows better by making a linear falloff.

Quadratic:

Looks similar to Gaussian but can be a little faster but slightly worse looking.

Cubic:

Preserve the highs, but give an almost out-of-focus blur while smoothing sharp edges.

Gaussian:

Gives the best looking results but tends to be the slowest.

Fast Gaussian:

An approximation of the Gaussian.

Catmull-Rom:

Catmull-Rom keeps sharp contrast edges crisp.

Mitch:

Preserve the highs, but give an almost out-of-focus blur while smoothing sharp edges.

Extend Bounds

Allows the image, that is being blurred, to extend past its original dimension.

Separable

Use faster approximation by blurring along the horizontal and vertical directions independently.

Outputs

Image

Standard color output.

Example

Blur node blur modes using 20% of image size as XY, no Bokeh/Gamma.
../../../../_images/compositing_types_filter_blur-node_example-1-original.png

Original image.

../../../../_images/compositing_types_filter_blur-node_example-2-flat.png

Flat.

../../../../_images/compositing_types_filter_blur-node_example-3-tent.png

Tent.

../../../../_images/compositing_types_filter_blur-node_example-4-quadratic.png

Quadratic.

../../../../_images/compositing_types_filter_blur-node_example-5-cubic.png

Cubic.

../../../../_images/compositing_types_filter_blur-node_example-6-gaussian.png

Gaussian.

../../../../_images/compositing_types_filter_blur-node_example-7-fast-gaussian.png

Fast Gaussian.

../../../../_images/compositing_types_filter_blur-node_example-8-catmull-rom.png

Catmull-Rom.

../../../../_images/compositing_types_filter_blur-node_example-9-mitch.png

Mitch.