3.15. Blur/Sharpen

Pav. 14.102. Blur/Sharpen tool icon in the Toolbox

Blur/Sharpen tool icon in the Toolbox

The Blur/Sharpen tool uses the current brush to locally blur or sharpen your image. Blurring with it can be useful if some element of your image stands out too much, and you would like to soften it. If you want to blur a whole layer, or a large part of one, you will probably be better off using one of the Blur Filters. The direction of a brushstroke has no effect: if you want directional blurring, use the Smudge tool.

In Sharpen mode, the tool works by increasing the contrast where the brush is applied. A little bit of this may be useful, but over-application will produce noise. Some of the Enhancement Filters, particularly the Unsharp Mask, do a much cleaner job of sharpening areas of a layer.

[Patarimas] Patarimas

You can create a more sophisticated sharpening brush using the Clone tool. To do this, start by duplicating the layer you want to work on, and run a sharpening filter, such as Unsharp Mask, on the copy. Then activate the Clone tool, and in its Tool Options set Source to Image source and Alignment to Registered. Set the Opacity to a modest value, such as 10. Then Ctrl-click on the copy to make it the source image. If you now paint on the original layer, you will mix together, where the brush is applied, the sharpened version with the unsharpened version.

Tiek išliejimas, tiek paryškinimas veikia stiprėjančiai: su kiekvienu teptuko potėpiu toje pačioje vietoje stiprėja ir jo sukuriamas efektas. Valdiklis Greitis leidžia nurodyti kaip greitai stiprėja sudėtinių pakeitimų efektas. Tačiau, galima naudoti valdiklį Nepermatomumas, jeigu norite nurodyti suliejimo, kurį galima sukurti vienu potėpiu, dydį, nesvarbu kiek tų potėpių atliekama vienoje vietoje.

3.15.1. Įrankio aktyvavimas

There are different possibilities to activate the tool:

  • From the image-menu: ToolsPaint toolsBlur/Sharpen.

  • The Tool can also be called by clicking the tool icon: in the Toolbox.

  • By using the keyboard shortcut Shift+U.

3.15.2. Modifikavimo klavišai (numatytieji)

See the Paint Tools' Common Features for a description of key modifiers that have the same effect on all paint tools.


Holding down the Ctrl key toggles between Blur and Sharpen modes; it reverses the setting shown in the Tool Options.

3.15.3. Parinktys

Pav. 14.103. Tool Options for the Blur/Sharpen tool

Tool Options for the Blur/Sharpen tool

Normally, tool options are displayed in a window attached under the Toolbox as soon as you activate a tool. If they are not, you can access them from the image menu bar through WindowsDockable WindowsTool Options which opens the option window of the selected tool.

Mode; Opacity; Brush; Size; Aspect Ratio; Angle; Spacing; Hardness; Dynamics; Dynamics Options; Force; Apply Jitter; Smooth Stroke; Lock brush to view

See the Common Paint Tool Options for a description of tool options that apply to many or all paint tools.

Hard edge: this option gives a hard contour to the blurred/sharpened area.

Suliejimo / paaštrinimo tipas

Blur mode causes each pixel affected by the brush to be blended with neighboring pixels, thereby increasing the similarity of pixels inside the brushstroke area. Sharpen mode causes each pixel to become more different from its neighbors than it previously was: it increases contrast inside the brushstroke area. Too much Sharpen ends in an ugly flocculation aspect. Whatever setting you choose here, you can reverse it on-the-fly by holding down the Ctrl key.

Suliejimas / paaštrinimas pagrįstas matematiniu matricų naudojimo metodu.


The Rate slider sets the strength of the Blur/Sharpen effect.