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# Topic: transformation

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

*See also the corresponding keyword for additional references:*

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