Paper
20 October 1993 Two-stage superresolution technique using a piecewise-linear model
Alan H. Lettington, Qi He Hong
Author Affiliations +
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.
© (1993) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Alan H. Lettington and Qi He Hong "Two-stage superresolution technique using a piecewise-linear model", Proc. SPIE 2028, Applications of Digital Image Processing XVI, (20 October 1993); https://doi.org/10.1117/12.158635
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CITATIONS
Cited by 2 scholarly publications.
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KEYWORDS
Image processing

Spatial frequencies

Spatial resolution

Diffraction

Digital image processing

Super resolution

Mathematical modeling

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