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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