8.6. Sobelova metoda

8.6.1. Overview

Obrázek 17.166. Applying example of the Sobel filter

Applying example of the Sobel filter

Original image

Applying example of the Sobel filter

Filter Sobel applied

Sobel's filter detects horizontal and vertical edges separately on a scaled image. Color images are turned into RGB scaled images. As with the Laplace filter, the result is a transparent image with black lines and some rest of colors.

8.6.2. Activating the Filter

This filter is found in the main menu under FiltersEdge-DetectSobel….

8.6.3. Options

Obrázek 17.167. Sobel filter options

Sobel filter options

Presets, Input Type, Clipping, Blending Options, Preview, Split view
[Poznámka] Poznámka

These options are described in 2 – „Common Features“.


Renders near horizontal edges.


Renders near vertical edges.

Keep sign

This option allows you to set how the filter will work if you have selected one direction for use only: a flat relief with bumps and hollows will be created.