Sobel filter
From AWF-Wiki
The Sobel filter creates an image emphasising edges.
- In the search engine of the Processing Toolbox, type Sobel and select EdgeExtraction (sobel) under Feature Extraction of the Orfeo Toolbox.
- Under the Parameters tab, select a single band or a multiband file as input layer.
- Select a specific band number in case of a multiband file.
- Select sobel as Smoothing Type.
