Fourier transforms of colour images usingquaternion or hypercomplex, numbers
Stephen J. Sangwine · Electronics Letters · 1996
The 2D quaternion, or hypercomplex, Fourier transform is introduced. This transform makes possible the handling of colour images in the frequency domain in a holistic manner, without separate handling of the colour components, and it thus makes possible very wide generalisation of monochrome frequency domain techniques to colour images.