Coherent and digital image enhancement, their basic differences and constraints

In this paper, image enhancement within and beyond the diffraction limit will be discussed. The basic differences and constraints of coherent and digital enhancement techniques will also be given. The essential difference between these two techniques is that a coherent optical system is a passive de...

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Bibliographic Details
Published in:Optics communications 1971, Vol.3 (6), p.440-442
Main Author: Yu, F.T.S.
Format: Article
Language:English
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Summary:In this paper, image enhancement within and beyond the diffraction limit will be discussed. The basic differences and constraints of coherent and digital enhancement techniques will also be given. The essential difference between these two techniques is that a coherent optical system is a passive device, but a digital processing system is active. Therefore it may be concluded that, in a coherent technique, the image enhancement can be performed, at the most, within the diffraction limit; however, in a digital technique, the image enhancement may be beyond the diffraction limit.
ISSN:0030-4018
1873-0310
DOI:10.1016/0030-4018(71)90277-X