Results 191 to 200 of about 5,663,570 (216)

Image Perspective Transformationsâ€â€?Urban Scenes [PDF]

open access: possibleOptical Engineering, 1981
This paper discusses a technique for converting digitized oblique low-altitude aerial photography to gray level imagery as seen from other viewing perspectives. The technique makes use of one- and two-camera perspective transformations. Inputs to these transformations are camera model information and a stick figure representation of the scene.
Robert N. Devich, Frederick M. Weinhaus
openaire   +1 more source

Atmospheric Optical Propagationâ€â€?An Integrated Approach

Optical Engineering, 1982
The task of characterizing optical wave propagation through the earth's atmosphere under low-visibility weather conditions is extremely difficult; it requires, in essence, solution of the general multiple-scattering problem. This paper describes results from an integrated approach to propagation through the turbid atmosphere in which experiments are ...
Jeffrey H. Shapiro   +4 more
openaire   +2 more sources

CCD/Transit Instrument Deep Photometric And Polarimetric Surveyâ€â€?A Progress Report

Optical Engineering, 1984
We have previously reported on the conceptual design and predicted performance of a new type of dedicated astronomical telescope to be used for a deep photometric survey for galactic and extragalactic variability and polarization.' Data derived from this survey will be useful for a wide variety of astronomical investigations including the definition of
J. T. McGraw   +4 more
openaire   +2 more sources

Strain Determination On Curved Surfaces Using Far•Field Objective Laser Speckles

Optical Engineering, 1982
Most of the laser speckle methods utilize subjective speckles in that speckles are recorded through a lens whose aperture determines the admitted spatial frequencies. Objective speckles are those intrinsically formed by the scattering wavelets. In this paper we propose the use of far-field objective speckles generated from a ground glass to measure ...
C. C. Kin, Fu-Pen Chiang
openaire   +2 more sources

Social and Philosophic Principles of Resolving the Ethnic and Interethnic Contradictions

, 2016
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Boboyorov Bobomurod Normatovich
semanticscholar   +1 more source

Diode Laser Arrays With High Power In The 4 To 5 µm Infrared Region

Optical Engineering, 1984
We have fabricated monolithic four-element diode laser arrays of PbS09Se01, emitting 100 mW of cw power per array end at 4 A in the 4 to 5µm spectral region. Corresponding to an external quantum efficiency of 20%, these arrays demonstrate the feasibility of upscaling output power levels by the parallelization of stripe-geometry diode lasers on a single
K. J. Linden, R E. Reeder
openaire   +2 more sources

Design Of Null Lens Correctors For The Testing Of Astronomical Nnfit‘C

Optical Engineering, 1988
Some design examples are presented that illustrate the design of null correctors for the testing of strong aspherical surfaces such as those that are of interest in astronomical instrumentation. The design and analysis of an Offner corrector for an f/1 paraboloid is given.
openaire   +2 more sources

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