4.5.4. PCA

_images/pca_tab.jpg

pca_tool PCA

This tab allows for the PCA (Principal Component Analysis) of bands loaded in the Band set.

A report .txt is saved along with the PCA bands, containing the covariance matrix, correlation matrix, eigen vectors, and eigen values.

4.5.4.1. Principal Component Analysis of Band set

  • Select input band set input_number: select the input Band set;

  • checkbox Number of components input_number: if checked, set the number of calculated components; if unchecked, all the components are calculated;

  • checkbox Use value as NoData input_number: if checked, set the value of NoData pixels, ignored during the calculation;

  • BATCH batch_tool: add this function to the Batch;

  • RUN run: select an output directory and start the calculation process; principal components are calculated and saved as raster files; also, the details about the PCA are displayed in the tab Output and saved in a .txt file in the output directory;