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Applied Optics

Applied Optics


  • Vol. 23, Iss. 15 — Aug. 1, 1984
  • pp: 2572–2582

Modulation-transfer-function analysis for sampled image systems

Stephen K. Park, Robert Schowengerdt, and Mary-Anne Kaczynski  »View Author Affiliations

Applied Optics, Vol. 23, Issue 15, pp. 2572-2582 (1984)

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Sampling generally causes the response of a digital imaging system to be locally shift-variant and not directly amenable to MTF analysis. However, this paper demonstrates that a meaningful system response can be calculated by averaging over an ensemble of point-source system inputs to yield an MTF which accounts for the combined effects of image formation, sampling, and image reconstruction. As an illustration, the MTF of the Landsat MSS system is analyzed to reveal an average effective IFOV which is significantly larger than the commonly accepted value, particularly in the along-track direction where undersampling contributes markedly to an MTF reduction and resultant increase in image blur.

© 1984 Optical Society of America

Original Manuscript: December 22, 1983
Published: August 1, 1984

Stephen K. Park, Robert Schowengerdt, and Mary-Anne Kaczynski, "Modulation-transfer-function analysis for sampled image systems," Appl. Opt. 23, 2572-2582 (1984)

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