In 1994 Jeffrey Uhlmann noted that the EKF takes a nonlinear function and partial distribution information (in the form of a mean and covariance estimate) of the state of a system but applies an approximation to the known function rather than to the imprecisely-known probability distribution.
Fourier transform | Laplace transform | Fast Fourier transform | Extract, transform, load | Hilbert transform | Fourier transform infrared spectroscopy | fast Fourier transform | Discrete cosine transform | transform | Mellin transform | discrete cosine transform | Bilinear transform | Z-transform | Y-Δ transform | Wavelet transform modulus maxima method | Hough transform | Gabor–Wigner transform | Gabor transform | fractional Fourier transform | Fourier transform spectroscopy | Fourier Transform | fast fourier transform | Discrete Hartley transform | Adaptive Transform Acoustic Coding (ATRAC) | Adaptive Transform Acoustic Coding |