8.7. Image Gradient
| 8. 輪郭抽出フィルター |

### 8.7. Image Gradient

#### 8.7.1. 概観

図17.173 Applying example for the Image Gradient filter

元画像

Filter 「Image Gradient」 applied with default options.

Filter 「Image Gradient」 applied with Direction option.

This filter detects edges in one or two gradient directions.

#### 8.7.2. Activating the Filter

This filter is found in the main menu under Filters → Edge-Detect → Image Gradient….

#### 8.7.3. オプション

図17.174 Image Gradient filter options

Presets, 「Input Type」, Clipping, Blending Options, プレビュー, Merge filter, Split view

  | 注記
  These options are described in 「Common Features」.

Output mode

  Magnitude is default: it combines both directions. Direction: only one direction is used. Both is like Magnitude.

  図17.175 Output mode examples

  Original image, with abrupt luminosity change

  Option Magnitude is selected

  Option Direction is selected. In result, black is no edge detected, white is edge detected.

8.6. ソーベル... |  | 9. 汎用フィルター

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