How to Create a Gaussian Blur in Photoshop?

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Aina Martin
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Photoshop offers the possibility of creating many effects. We will discover together the Gaussian blur which is widely used both to create depth of field and to blur parts of your composition.

Definition: the Gaussian blur is part of the attenuation filters. In Photoshop, the latter makes it possible to standardize the parts of an image by blurring them and therefore by harmonizing the details of it.

How to Create a Gaussian Blur in Photoshop?

1. Open the image on which you want to assign this effect.

File> Open
Look for your image in your computer

Open your image

2. Go to filter> Blur> Gaussian blur

filter > Blur > Gaussin blur

3. After validating this effect the Gaussian Blur window will open with different parameters available.

Le 4 et 5 allows us to vary the intensity of the effect.
Simply enter a numeric value 4 or move the slider from right to left 5

Blur settings

4. The larger this value, the more pronounced the blur.

Once the correct value click OK to validate the effect.

In this example the blur applies to the entire image because we have assigned it to the background layer.

more intense blur

How to blur only part of the image?

1. Select with your favorite tool the object or the part you want to isolate from blurring.

For the example it will be the skateboard.

Learn how to use the Quick Selection Tool.

select skateboard

2. Invert the selection so that it is the background and not the object that is selected, otherwise the blur will be attributed to the skateboard

Go to the tab Select > Swap

3. Window > Blur > Gaussian Blur

You will be able to interact with the parameters in the same way as before.
Now the blur applies to the background while the skateboard stays in focus.

Confirm by pressing OK once it suits you.

Blur the background

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