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. | ||
| + | [[File:Qgis_edge_sobel.png|400px]] | ||
| + | {| class="wikitable" | ||
| + | |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|400px|'''Figure B:''' Output image: Sobel filtered Sentinel-2 synthesis image (University Göttingen Campus North)]] | ||
| + | |} | ||
[[category:Spatial Filtering]] | [[category:Spatial Filtering]] | ||
Latest revision as of 16:00, 15 November 2019
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.
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