Gaussian Blur Effect

1. Open suitable picture.
2. Choose Magnetic Lasso Tool from the Tools menu.

3. Select the subject of picture using Magnetic Lasso tool and double-click after finish select the subject.

 4. Go to the Main Menu and choose Select > Inverse.

5. Now the background is selected. Let’s apply the blur effect by go to Filter > Blur > Gaussian Blur….

6. Choose suitable radius:

 7. The result: