Retrieval of diffraction-limited images from below the threshold of recognition by superdirective data processing
作者:
R.N.Strickland,
J.C.Bennett,
A.P.Anderson,
期刊:
IEE Journal on Microwaves, Optics and Acoustics
(IET Available online 1978)
卷期:
Volume 2,
issue 3
页码: 85-90
年代: 1978
DOI:10.1049/ij-moa.1978.0017
出版商: IEE
数据来源: IET
摘要:
The resolution of long-wavelength imaging systems is normally limited by the effective recording-aperture dimension, and may preclude target recognition. It is shown that, for imaging systems in which complex field values are recorded, the aperture can be effectively extrapolated by a superdirective weighting function, thereby restoring essential features to a severely diffraction-limited image. Limitations to image enhancement arising from spatial noise in the object plane are discussed.
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