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Definition of "Fourier transform" |
An integral transformation from the time domain to the frequency domain. / A Fourier transform converts a signal from the time domain to the frequency domain. It shows the signal's spectral content, divided into discrete bins. / a linear mathematical transform from the domain of time or space functions to the frequency domain. The discrete version of the transform (DFT) can be implemented with a particularly efficient algorithm (fast Fourier transform or FFT). The discrete Fourier transform of a digital image represents the image as a linear combination of complex exponentials. |
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