Sobel filter

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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.

Qgis edge sobel.png

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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