Sobel filter
From AWF-Wiki
(Difference between revisions)
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* Select '''sobel''' as Smoothing Type. | * Select '''sobel''' as Smoothing Type. | ||
[[File:Qgis_edge_sobel.png|400px]] | [[File:Qgis_edge_sobel.png|400px]] | ||
− | + | {| class="wikitable" | |
+ | |style="border: 0pt" | [[file:Qgis_campus_synthesis.png|thumb|left|450px|'''Figure B:''' Input image: Sentinel-2 synthesis image based on 4 10m bands, (University Göttingen Campus North)]] | ||
+ | |style="border: 0pt" | [[file:Qgis_campus_synthesis.png|thumb|center|450px|'''Figure C:''' Output image: Sobel filtered Sentinel-2 synthesis image (University Göttingen Campus North)]] | ||
+ | |} | ||
[[category:Spatial Filtering]] | [[category:Spatial Filtering]] |
Revision as of 13:22, 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.