Spatial Frequency Analysis

Swearer, Joan

doi:10.1007/978-3-319-56782-2_1403-2

Joan Swearer⁴

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Synonyms

Spatial filtering

Definition

Spatial frequency analysis is a specialized form of systems analysis. It is used to study the spatial filtering properties of optical imaging devices. A filter in systems analysis is thought of as a stimulus-response mechanism that responds better to some stimuli than others. A linear system is one that accepts an input and produces an output. The input and output can be one dimensional (time), two dimensional (space), or higher dimensional. Spatial frequency analysis is a way in which one can predict the response of a linear spatial filter to any spatial pattern or complex waveform. Sinusoidal (sine-wave) gratings are used to determine the spatial filtering characteristics under study. This is because a sine function is the one spatial function that can pass through a linear filter unchanged in form. A sine-wave grating of specified orientation, spatial frequency, amplitude, and spatial phase is thought of as a Fourier component. All visual images...

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References and Readings

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Authors and Affiliations

Department of Neurology, University of Massachusetts Medical School, 55 Lake Avenue North, Worcester, MA, 01655, USA
Joan Swearer

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Joan Swearer
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Correspondence to Joan Swearer .

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Editors and Affiliations

Richmond, Virgin Islands, USA
Jeffrey Kreutzer
Kessler Foundation , West Orange, New Jersey, USA
John DeLuca
Suite 200 , Wynnewood, Pennsylvania, USA
Bruce Caplan

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Swearer, J. (2017). Spatial Frequency Analysis. In: Kreutzer, J., DeLuca, J., Caplan, B. (eds) Encyclopedia of Clinical Neuropsychology. Springer, Cham. https://doi.org/10.1007/978-3-319-56782-2_1403-2

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DOI: https://doi.org/10.1007/978-3-319-56782-2_1403-2
Received: 20 January 2016
Accepted: 24 February 2017
Published: 31 March 2017
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-56782-2
Online ISBN: 978-3-319-56782-2
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