Gaussian filter

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The Gaussian smoothing filter is used for noise reduction and removing details. The filter is simialr to the arithmetic mean filter but it uses a different kernel that represents the shape of a 2D Gaussian distribution.

  • In the search engine of the Processing Toolbox, type Smoothing and select Smoothing (gaussian) under Image Filtering of the Orfeo Toolbox.
  • Under the Parameters tab, select a single band or a multiband file as input layer.
  • Select gaussian from the drop-down list as Smoothing Type.
  • Adjust the Radius of a circular element in pixel size.

Qgis smooth gauss.png

Figure A: Input image: pansharpend Sentinel-2 composite (RGB=B7,B6,B5), University Göttingen Campus North
Figure B: Output image: Gaussian filtered Sentinel-2 composite (RGB=B7,B6,B5), University Göttingen Campus North
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