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Physics, Techniques and Procedures

Spatial frequency

frequency of a sinusoidal wave in space and by definition the inverse of the wavelength l. Its relationship to k (k space) is

k = 2 p /l

and it is important in imaging as in many imaging processes it is useful to decompose the image data using a spatial Fourier transformation FT on the field of view, whose dimensions define the longest "wave length possible. Small objects generate high spatial frequencies, while large objects generate low spatial frequencies.

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