Mathematically, the continuous Fourier transform is one of the specific forms of the Fourier analysis. It transforms the original function in the time-domain into another function in the frequency domain. The term “Fourier transform” can refer to either the frequency domain representation of a function or to the process/formula that transforms one function to another.
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(2009). Fourier Transform. In: Li, S.Z., Jain, A. (eds) Encyclopedia of Biometrics. Springer, Boston, MA. https://doi.org/10.1007/978-0-387-73003-5_924
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DOI: https://doi.org/10.1007/978-0-387-73003-5_924
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