Sobel filter
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[[File:Qgis_edge_sobel.png|400px]] | [[File:Qgis_edge_sobel.png|400px]] | ||
{| class="wikitable" | {| class="wikitable" | ||
| − | |style="border: 0pt" | [[file:Qgis_campus_synthesis.png|thumb|left| | + | |style="border: 0pt" | [[file:Qgis_campus_synthesis.png|thumb|left|400px|'''Figure A:''' Input image: Sentinel-2 synthesis image based on 4 10m bands, (University Göttingen Campus North)]] |
| − | |style="border: 0pt" | [[file:Qgis_campus_sobel.png|thumb|center| | + | |style="border: 0pt" | [[file:Qgis_campus_sobel.png|thumb|center|400px|'''Figure B:''' Output image: Sobel filtered Sentinel-2 synthesis image (University Göttingen Campus North)]] |
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[[category:Spatial Filtering]] | [[category:Spatial Filtering]] | ||
Revision as of 13:56, 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 Smoothing Type.
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