GRASS GIS 8.4.2 Reference Manual: Topic transformation - GRASS GIS Manual
Author: GRASS Development Team

## Topic: transformation

i.fft | Fast Fourier Transform (FFT) for image processing.
i.ifft | Inverse Fast Fourier Transform (IFFT) for image processing.
i.pca | Principal components analysis (PCA) for image processing.
i.tasscap | Performs Tasseled Cap (Kauth Thomas) transformation.
m.transform | Computes a coordinate transformation based on the control points.
v.transform | Performs an affine transformation (shift, scale and rotate) on vector map.

See also the corresponding keyword transformation for additional references.

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