gives a blurred version of image.


gives a version of image blurred over pixel radius r.


  • Blur is a filter function typically used for blurring an image. It is commonly used to suppress noise or to defocus an image.
  • Blur[image] is equivalent to Blur[image,2].
  • Blur works with 2D and 3D images. For multichannel images, it operates separately on each channel.
  • Blur[image,{r1,r2}] uses radius r1 in height and r2 in width.
  • Blur[image,{r1,r2,r3}] uses radius r1 in height, r2 in depth and r3 in width.
  • Blur[image] gives an image with the same underlying data type as image, except for "Bit" images.  »

Background & Context

  • Blur is a filter function typically used for blurring (or smoothing) of an image. It can be used to suppress noise and local pixel variation or as an effect to de-focus an image.
  • Finer control over the amount and shape of blurring to be applied can be obtained using other filter functions such as GaussianFilter and ImageConvolve.
  • The converse of blurring is known as sharpening, which can be performed by functions such as Sharpen and ImageDeconvolve.


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Basic Examples  (2)

Blur a photo:

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Specify the amount of blurring:

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Scope  (5)

Applications  (7)

Properties & Relations  (2)

Neat Examples  (1)

Introduced in 2008
Updated in 2012