blur out something in a picture
This will blur the background of your image. 1  Play around with different blur radii to create the background effect you want. 2  The larger the radius, the blurrier the image, so if youâre going for a subtle effect, aim low.his will blur the background of your image. 1  Play around with different blur radii to create the background effect you want. 2  The larger the radius, the blurrier the image, so if youâre going for a subtle effect, aim low.