Principal component analysis

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Using QGIS OTB plugin

Does currently not work in OTB plugin for QGIS 3.4.

  • In the search engine of the Processing Toolbox, type PCA and select DimensionalityReduction(pca) under Image Filtering of the Orfeo Toolbox.
  • Under the Parameter tab, select Multispectral band file as the input layer.
  • Select pca under the Algorithm tab.
  • Enter 4 as the number of components.
  • Specify the directory to save the output file.
  • Untick output file after running algorithm (inverse output image) option.
  • Click on Run to execute the algorithm.

Using OTB standalone

Type into the search box of the Windows taskbar: Mapla. The Monteverdi Application Launcher opens

Pca otb.pngPca result.png

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