Sobel filter
From AWF-Wiki
The Sobel filter creates an image emphasising edges.
- In search engine of Processing Toolbox, type Edge extraction and select EdgeExtraction under Feature Extraction of 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 Edge Feature.