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Interpretation of star test pattern images
Author(s) -
Burgess A. E.
Publication year - 1977
Publication title -
medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.473
H-Index - 180
eISSN - 2473-4209
pISSN - 0094-2405
DOI - 10.1118/1.594379
Subject(s) - focus (optics) , separable space , distortion (music) , artificial intelligence , star (game theory) , interpretation (philosophy) , image (mathematics) , computer vision , computer science , optics , physics , mathematics , mathematical analysis , amplifier , bandwidth (computing) , computer network , programming language
The star test pattern image contains a large amount of information about the focus OTF which is not presently used. A mathematical analysis of these images for the special case of separable and symmetrical focal spots is presented. Circular blur loci are identified and their changes over the imaging field are described. Harmonic distortion and its application are described. Sources of measurement error are discussed.