Sobel filter

Revision as of 17:59, 20 November 2017

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 Edge Feature.

Figure A: Input image: Sentinel-2 synthesis image based on 4 10m bands, (University Göttingen Campus North)	Figure B: Output image: Sobel filtered Sentinel-2 synthesis image (University Göttingen Campus North)

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 * 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.
+* Select '''sobel''' as Edge Feature.
 [[File:Qgis_edge_sobel.png|400px]]
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