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Superhigh image resolution for microwave imaging
Author(s) -
Li HsuehJyh,
Liu TaYung,
Yang ShengHui
Publication year - 1990
Publication title -
international journal of imaging systems and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.359
H-Index - 47
eISSN - 1098-1098
pISSN - 0899-9457
DOI - 10.1002/ima.1850020105
Subject(s) - extrapolation , azimuth , resolution (logic) , image resolution , microwave imaging , angular resolution (graph drawing) , optics , range (aeronautics) , microwave , image processing , polar , polar coordinate system , computer science , image (mathematics) , computer vision , physics , artificial intelligence , geometry , materials science , mathematics , telecommunications , mathematical analysis , combinatorics , composite material , astronomy
Algorithms for extrapolating the scattered field along the frequency direction and the azimuthal direction are developed and analyzed. Their effects on the image resolution for polar format processing and rectangular format processing are discussed. Simulation and experimental results show that extrapolation along the frequency direction does increase the range resolution. While extrapolation along the azimuthal direction improves the cross‐range resolution for small angle imaging, it does not improve image resolution of complex‐shaped objects for wide angle imaging. Both range and cross‐range resolutions can be improved simultaneously for small angle imaging using rectangular format processing if the angular interval and the resolution cells are suitably chosen. A promising application for the algorithms developed is in microwave dynamic imaging.