8.7. Image Gradient

8.7. Image Gradient
	8. Edge-Detect Filters

8.7.1. Overview

Figure 17.163. Applying example for the Image Gradient filter

Original image

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

You can find this filter through Filters → Edge-Detect → Image Gradient….

8.7.3. Options

Figure 17.164. Image Gradient filter options

Presets, Preview, Split view

	Note
	These options are described in Section 2, “Common Features”.

Output mode

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

Figure 17.165. 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.

Clipping

The result of this filter can be larger than the original image. With the default Adjust option, the layer will be automatically resized as necessary when the filter is applied. With the Clip option the result will be clipped to the layer boundary.