Easily Blur the Selected Background in Photoshop

 

Gaussian Blur

Gaussian Blur is the most basic and most effective blur tool. It merges and overlaps all pixels to create a generalized blur effect.

1. 1. Select Filter > Blur > Gaussian Blur.

   

2. 2. Use the slider to decide how blurred you want the background to be.

   Note: Use the preview window to look at a portion of the image, or select Preview to see the whole image.

   

3. 3. When you're happy with the result, select OK.

   

4. 4. Photoshop applies the blur effect to the selected area only. Press Command+D (or Ctrl+D on Windows) to deselect and see the final result.

   

Motion Blur

This effect gives the impression of movement, as if the background is moving at high speed or the photographer is quickly moving past it.

1. 1. Select Filter > Blur > Motion Blur.

   

2. 2. Use the Distance modifier to change the strength of the blur effect.

   

3. 3 If desired, change the angle of the motion by entering a number in the corresponding box, or click and drag the small reticule.

   Note: It's easier to see how the angle affects the final effect if you adjust it after setting the distance.

   

4. 4. Select OK to accept the changes.

   

5. 5. Photoshop applies the blur effect to the selected area only. Press Command+D (or Ctrl+D in Windows) to deselect and see the final result.

   

Lens Blur

For a more subtle blurring that's akin to a shallow depth of field in photography, use Lens Blur. It has several options to play with, including:

• a. Radius: Affects the strength of the blur.
• b. Shape and Blade Curvature: Adjusts the virtual lens that shapes the blur.
• c. Specular highlights: Increases the brightness of some portions of the image to imitate a longer exposure than when the image was initially taken.

Play around with the settings until you find the effect you like, then select OK.

Radial Blur

For a unique look, apply a Radial Blur. It's not a natural look, but it makes the foreground subject appear as though it emerged through some sort of portal.

Note: Radial Blur doesn't include a preview, so you may have to try several options until you get the effect you want.