3.4. Lens Blur
| 3. 模糊滤镜 |

### 3.4. Lens Blur

#### 3.4.1. Overview

图 17.14. The Lens Blur filter

Original

Lens Blur applied

Lens blur simulates an out-of-focus camera picture.

#### 3.4.2. Options

图 17.15. Lens Blur filter dialog options

Presets, “Input Type”, Clipping, Blending Options, Preview, Split view

  | 注意
  These options are described in 第 2 节 “Common Features”.

Aux input

  This allows you to select an additional input layer or channel, that will be used to compute the lens blur. Clicking on the square picture allows you to select from a list of available layers and channels. The Aux input will only be used if this setting is enabled.

Radius

  The size of the blur radius.

Highlight factor

  Relative highlight strength.

Highlight threshold

  Here you can set the minimum and maximum values for highlighting. It can be set either by dragging the black and white triangles, or inputting exact values into the number entry fields.

Clip to input extents

  If enabled, this limits the output to the input extents.

Linear mask

  If enabled, use linear mask values.

3.3. Gaussian Blur |  | 3.5. Mean Curvature Blur

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