Results 261 to 270 of about 5,815,790 (304)

Efficient encoding of natural optic flow

Network: Computation in Neural Systems, 2008
Statistically efficient processing schemes focus the resources of a signal processing system on the range of statistically probable signals. Relying on the statistical properties of retinal motion signals during ego-motion we propose a nonlinear processing scheme for retinal flow.
Dirk, Calow, Markus, Lappe
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Optical efficiency of image sensor pixels

Journal of the Optical Society of America A, 2002
The ability to reproduce a high-quality image depends strongly on the image sensor light sensitivity. This sensitivity depends, in turn, on the materials, the circuitry, and the optical properties of the pixel. We calculate the optical efficiency of a complementary metal oxide semiconductor (CMOS) image sensor pixel by using a geometrical-optics phase ...
Peter B, Catrysse, Brian A, Wandell
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High-efficiency multipass optical limiter

Optics Letters, 2003
We report experimental results on a highly efficient optical limiter that uses a three-mirror, multipass ring configuration. The optical limiter's enhanced performance is based on the accumulative effect that is achieved when the laser beam passes through the sample several consecutive times.
N M, Neto Barbosa, C R, Mendonça, L, Misoguti, S C, Zilio   +3 more
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Energy efficiency of passive optical networks

2017 International Conference on Computer Science and Engineering (UBMK), 2017
In this study passive optical network structures and standards are examined, energy efficiency methods in passive optical network technology are investigated, sleep mode technique and related studies made in this subject are mentioned.
Guven, Zeynep Behrin, Aydin, Muhammet Ali   +1 more
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Reliable and Efficient Computation of Optical Flow

International Journal of Computer Vision, 1998
In this paper, we present two very efficient and accurate algorithms for computing optical flow. The first is a modified gradient-based regularization method, and the other is an SSD-based regularization method. For the gradient-based method, to amend the errors in the discrete image flow equation caused by numerical differentiation as well as temporal
Shang-Hong Lai, Baba C. Vemuri
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On efficiency of optical modulations for optical channel with noise

Electronics and Communications in Japan (Part I: Communications), 1993
AbstractRecently, in parallel with the advancement of lightwave technology, there has been a considerable amount of research and development work in the system engineering aspects of optical communication, including important basic research. Various types of modulation have now been applied in real optical communication systems.
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Optical Efficiency Factors for Concentric Spheres

Applied Optics, 1967
Extinction, scattering, and absorption efficiency factors for a concentric sphere of a nonlight absorbing nucleus (m = 1.5) and an absorbing shell (m = 1.95 - 0.66i) were calculated based on the theory of Aden and Kerker. For small size parameters (v < 1), the magnitude of the extinction efficiency factor is markedly affected by the shell thickness. An
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Optical efficiencies of lightning in planetary atmospheres

Nature, 1987
Spacecraft observations show that the presence of lightning activity is not confined to the terrestrial atmosphere, but is also found in the atmospheres of Venus, Jupiter and Saturn. Lightning activity may also occur in Titan's thick atmosphere. Calculations show that lightning produces a significant fraction of the nitric oxide that reacts with the ...
W J, Borucki, C P, McKay
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Efficient utilization of transceivers in optical crossconnects

IEEE International Conference on Communications, 2005. ICC 2005. 2005, 2005
In this paper we present a novel architecture which implements sharing of the transceiver pairs between the regeneration sub-system and the local add-drop subsystem of the optical cross-connect. By making minor changes in the existing architecture we can implement our sharable architecture.
S. Richard Pramod, Hussein T. Mouftah
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Optical efficiency of LEDs with hemispherical lenses

Applied Optics, 1982
In this paper formulas are derived that describe the optical efficiency of an LED package consisting of a hemispherical lens placed on the cylinder. The dependence of this efficiency on the H/R ratio and the epoxy coefficient of refraction is calculated.
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