8.7. Image Gradient

8.7. Image Gradient
	8. 輪郭抽出フィルター

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.

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

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.