ADJUST DEPTH OF FIELD with a Lens Blur
ADJUST DEPTH OF FIELD with a Lens Blur filter Photoshop includes other blur filters. All the blur filters can soften or blur either a selected area or the entire image. These filters smooth the transitions between areas of contrast from hard edges or shaded areas by averaging the pixels that are juxtaposed to any lines or edges in an image. The Lens Blur filter works best for creating or simulating depth of field in a photo because it uses a depth map to determine the position of the pixels to blur. You can set the specific area to start blurring the focus in the image by specifying the source for the depth map. Using the Lens Blur filter with a separate Alpha channel or a layer mask as the source enables you to specify exactly what is in sharp focus and how much depth of field to apply. The Lens Blur filter also enables you to determine the shape of the iris to control how the blur appears. By changing the shape, curvature, or rotation of the iris in the Lens Blur dialog box, you control the look of the Lens Blur filter. ## ** %% ^^ $$ && 130 The Lens Blur dialog box appears. # Click and drag all the sliders to the left to remove any blur effect. $ Click here and select Alpha 1. % Click the main subject in the image to assign the point of focus. ^ Click and drag the Radius slider to the right to blur the background. & Click and drag the Blur Focal Distance slider to adjust the point of focus if necessary. Note: The Blur Focal Distance number corresponds to the level of gray at the targeted point in the Alpha channel. * Click OK.
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