Blur Layer

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Layer blur blur icon.png

About Blur Layer

Blur is a graphical effect that aims to imitate an unfocused image. In a photography context blur can occur when the focal point of the lens is not at the right position of the target of the photograph. Also blur can have other origins. Blurs can happen as the result of a poor exposure during its recording (too long exposure time for a large movement of the object or a high movement of the recorder). Also blurring occurs when you use a very wide aperture (f4). In that case the objects that are out of focus are very blurred compared to the situation where the aperture is fully closed (f22).

In a graphical context, blurs are effects that imitate those situations (with more or less success).

Specific Parameters

The specific parameters for the Blur Layer are:

Name Value Type
Type real icon.png Z Depth 0.000000 real
Type real icon.png Amount 1.000000 real
Type integer icon.png Blend Method Composite integer
Type vector icon.png Size 6.000000pt,6.000000pt vector
Type integer icon.png Type Fast Gaussian Blur integer


Size

The Size parameter controls how big the blur is. Depending on that value the blur can have different effects. Render time quickly increases as you increase the size parameter, so be careful.

This parameter is a compound value of two real numbers (x and y). Each indicates how big the blur is in its direction (x or y).

See the samples to get an idea of the variation of the sizes.

Types

There are 5 types of blur in synfig:

Samples

Here are some samples of Blurs.

  • For animated samples was used Star Layer in center of the Frame, with Outline Layer about width 0.05u
  • Example animation has 120 frames, and parameter Size from 0u,0u goto 1u,1u
  • Render Dialog set to value of Quality 9 and value of Anti-aliasing 1
Fast Gaussian 
Fast Gaussian
Box 
Box
Cross Hatch 
Cross Hatch
Disc 
Disc
Gaussian 
Gaussian

Synfig file from sample test - Media:blur.sifz


Fast Gaussian

Fast Gaussian Blur
Image:BlursFastGaussian.png Image:Blurs2FastGaussian.png


Box

Box Blur
Image:BlurBox.png Image:Blurs2Box.png


Cross Hatch

Cross Hatch Blur
Image:BlurCrossHatch.png Image:Blurs2CrossHatch.png


Disc

Disc Blur
Image:BlurDisc.png Image:Blurs2Disc.png


Gaussian

Gaussian Blur
Image:BlurGaussian.png Image:Blurs2Gaussian.png


Fast Gaussian Blur over all the layers
Image:Blur.png

See also

  • Motion Blur Layer a type of blur that aims to simulate a motion blur (the one that happens when the object's movement is too fast for the exposure time). It is controlled by a single parameter called "Aperture".


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