Blurring

Blurring[r]

is a two‐dimensional directive specifying that graphics objects are to be drawn with a blur effect of radius r.

Details

  • Blurring is also know as blur and Gaussian blur.
  • Blurring is typically used to soften images of graphics objects and to hide object features.
  • Blurring[r] specifies that r printer's points should be blended into each other.
  • The radius r is measured in units of printer's points, equal before magnification to of an inch.
  • Blurring[{r1,r2}] uses radius r1 in width and radius r2 in height.
  • Blurring[r] is effectively equivalent to Blurring[{r,r}].
  • Blurring[] is effectively equivalent to Blurring[3].
  • ImageScaled can be used to specify the radius and is taken to be fractions of the default image size.

Examples

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Basic Examples  (3)

Apply blur to text:

Plot several functions:

Highlight a region around Paris:

Scope  (12)

Basic Uses  (8)

Apply blurring to graphics primitives:

Apply blur to Text:

Apply blur to a plot:

Apply blur to a chart:

Style a geometric region:

Apply blur to an Image:

Show a blurred schematic outline map:

Summary box:

Specifications  (4)

Blurring[] applies a slight uniform blur:

Specify the blur radius:

Specify separate blur radii for the horizontal and vertical directions:

The blur radius is specified in printer's points by default:

Use an ImageScaled radius:

Applications  (9)

Basic Applications  (3)

Show the blur extents:

Apply a uniform blur:

Use separate blur radii for the horizontal and vertical directions:

Blur objects with an EdgeForm:

Blur object with Opacity:

Blur Effects  (4)

Simulate a depth-of-field effect with images:

Simulate a depth-of-field effect with graphics primitives:

Create a drop shadow:

Use DropShadowing to get the same effect:

Emphasize part of a visualization:

Blur all country names except "Sweden":

Visualization  (2)

Plot curves with blurring:

Style bar charts:

Properties & Relations  (2)

Blur gives a blurred version of an Image:

The equivalent effect using Blurring:

Blurring applies a Gaussian blur:

Equivalent Gaussian filter:

Interactive Examples  (2)

Simulate a depth-of-field effect:

Emphasize the country being moused over:

Wolfram Research (2022), Blurring, Wolfram Language function, https://reference.wolfram.com/language/ref/Blurring.html.

Text

Wolfram Research (2022), Blurring, Wolfram Language function, https://reference.wolfram.com/language/ref/Blurring.html.

CMS

Wolfram Language. 2022. "Blurring." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/Blurring.html.

APA

Wolfram Language. (2022). Blurring. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/Blurring.html

BibTeX

@misc{reference.wolfram_2025_blurring, author="Wolfram Research", title="{Blurring}", year="2022", howpublished="\url{https://reference.wolfram.com/language/ref/Blurring.html}", note=[Accessed: 19-February-2025 ]}

BibLaTeX

@online{reference.wolfram_2025_blurring, organization={Wolfram Research}, title={Blurring}, year={2022}, url={https://reference.wolfram.com/language/ref/Blurring.html}, note=[Accessed: 19-February-2025 ]}