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Proceedings Paper

Two-stage superresolution technique using a piecewise-linear model
Author(s): Alan H. Lettington; Qi He Hong
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Paper Abstract

Images obtained by passive millimeter wave systems are heavily blurred and band-limited due to diffraction. A two-stage superresolution algorithm has been developed to improve their spatial resolution beyond the diffraction limit. Initially, the spectrum of an image is restored within the passband and an interpolation operation may be combined in this stage of processing, but the resulting image then contains strong ringing due to the lack of higher spatial frequencies. These ringing artifacts are then reduced by using a piecewise-linear model which identifies and restores sharp edges, so introducing spatial frequencies beyond the passband. The effectiveness of this method has been demonstrated by applying it to synthesized and real mm-wave images.

Paper Details

Date Published: 20 October 1993
PDF: 7 pages
Proc. SPIE 2028, Applications of Digital Image Processing XVI, (20 October 1993); doi: 10.1117/12.158635
Show Author Affiliations
Alan H. Lettington, Univ. of Reading (United Kingdom)
Qi He Hong, Univ. of Reading (United Kingdom)

Published in SPIE Proceedings Vol. 2028:
Applications of Digital Image Processing XVI
Andrew G. Tescher, Editor(s)

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