3.7. Linear Motion Blur
| 3. 模糊滤镜 |

### 3.7. Linear Motion Blur

#### 3.7.1. Overview

图 17.22. The Linear Motion Blur filter

Original

Blur applied

This filter creates a linear blur in a direction determined by the “Angle” option. The default direction is horizontal to the right (0.000 degree).

#### 3.7.2. Options

图 17.23. “Linear Motion Blur” filter options

Presets, Preview, Split view

  These options are common to GEGL-based filters. Please refer to 第 2 节 “Common Features”.

Length

  In this case, “Length” represents the blur intensity. More Length will result in more blurring.

Angle

  “Angle” describes the direction of the movement. Thus, a setting of 90 will produce a vertical blur, and a setting of 0 will produce a horizontal blur.

Use selection as input

  Explained in 第 3.4 节 “Pixelize”.

On-canvas controls

  This option (default) allows you to modify blur settings directly on canvas, for easier visual tweaking of blur settings. It displays a line with handle on both ends to vary direction and transform.

  Press Ctrl key to change direction by 15° steps.

3.6. Circular Motion Blur |  | 3.8. Zoom Motion Blur

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