Journal ArticleDOI
Accuracy of angular spectral analysis with an anamorphic Fourier transformer
TLDR
Angular measurements in symmetrical and nonsymmetrical Fourier spectra are compared and better accuracy of angular spectral analysis with an anamorphic Fourier transformer is explained and experimentally proved.Abstract:
Angular measurements in symmetrical and nonsymmetrical Fourier spectra are compared. The coefficient of angular magnification of a spectrum and the effective angular extent of a scanning wedge filter are introduced. Better accuracy of angular spectral analysis with an anamorphic Fourier transformer is explained and experimentally proved.read more
Citations
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Journal ArticleDOI
Bio-optical properties of oceanic waters: A reappraisal
André Morel,Stéphane Maritorena +1 more
TL;DR: In this article, the spectral attenuation for downward irradiance Kd(X) and irradiance reflectance R(X), as well as a bio-optical model of the upper layer was developed.
Journal ArticleDOI
Anamorphic Multiple Matched Filter for Character Recognition, Performance with Signals of Equal Size
C. Ferreira,C. Vázquez +1 more
TL;DR: In this paper, the construction and performance of an anamorphic multiple matched filter for character recognition is presented, in the usual situation of characters of equal input size and having the same size in the target.
BookDOI
100 lat optyki na Uniwersytecie Warszawskim (1921–2021)
Abstract: This publication is related to the centenary of physics at the University of Warsaw. It describes the history of optics at the university since 1921, when Stefan Pieńkowski founded the Division of Physics at 69 Hoża Street in Warsaw. The author reports on the rapid development of research and significant discoveries in this field in the interwar period, when the Division of Physics earned a reputation as a world centre for molecular luminescence and atomic spectroscopy, attracting scientists from all over the world to Warsaw. Rebuilt after World War II, it got a new image when lasers were used for studies on the structure of atoms and molecules as well as atomic collisions. Today, it has become an internationally recognised modern centre for optical physics, including nonlinear optics, Fourier optics, plasmonics and quantum technologies.
Journal ArticleDOI
Holographic optical generation of prism anamorphs
A. Viswanath,K. Srinivasan +1 more
TL;DR: Analyses of prism anamorphic optical systems with single and multiple prisms in plane and spherical wave illumination geometries are presented and it is seen that this technique offers the advantage of generating elements with low f/number.
References
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Journal ArticleDOI
Human factors and behavioral science: Textons, the fundamental elements in preattentive vision and perception of textures
Bela Julesz,J. R. Bergen +1 more
TL;DR: Preattentive vision serves as an “early warning system” by pointing out those loci of texton differences that should be attended to, according to this theory, at any given instant the visual information intake is relatively modest.
Journal ArticleDOI
Textons, the fundamental elements in preattentive vision and perception of textures
Bela Julesz,J. R. Bergen +1 more
Journal ArticleDOI
Optical–digital processing of directional terrain textures invariant under translation, rotation, and change of scale
TL;DR: An oblique basis of signatures matched to the three classes of textures is proposed, which is invariant under translation, rotation, and change of scale, and is compared with either the direct signatures or the two proposed bases.
Journal ArticleDOI
A Diffraction Analysis of a Photograph of the Sea
TL;DR: In this article, the aerial photograph of the sea shown in Fig 1 has been examined in this way in the form of a transparency (a lantern slide) it was used to cover a lens of focal length 1 metre which was illuminated by the light from a sodium lamp behind a pinhole 2 metres away.
Journal ArticleDOI
Diffractive Processing of Geophysical Data
TL;DR: In this article, optical diffraction is used for the processing of variable-density seismograms, for which a special recorder has been constructed, and spatial filtering has also been applied to cloud cover pictures and contour maps.
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