Results 161 to 170 of about 2,949 (207)

An Image Processing Problem for Computer-Synthesized Full-Color Holograms

Computational Mathematics and Modeling, 2000
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Agayan, G. M., Goncharskii, A. A., Goncharskii, A. V.   +2 more
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Fast and effective algorithm for synthesizing computer-generated holograms

SPIE Proceedings, 2002
Over the past years great efforts have been made to find the optimization methods for synthesizing computer-generated holograms, e.g., kinoforms. The simulated annealing (SA) method is widely used in programing to approach the global optimization. But the drawback of the SA is it is time consuming.
Enwen Dai, Changhe Zhou, Peng Xi, Liren Liu   +3 more
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Analysis of 2D Digital Holography using Synthesized Holograms

Biomedical Optics and 3-D Imaging, 2012
An algorithm to generate synthesized holograms is described, and the results are validated by comparing them with an experiment. The system’s axial resolution is analyzed using the algorithm as an example of the algorithm’s capabilities.
Isao Matsubara, Chung-Chieh Yu, William J. Dallas   +2 more
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How the nonlinearity of synthesized holograms affects their imaging properties

Journal of Optical Technology, 2019
This paper discusses the main features of image formation by means of synthesized holograms, caused by the inherent nonlinearity of the mathematical description of the holographic field. Special attention is paid to discrete halftone and binary holograms, which are a limiting case of nonlinear holograms. Recommendations are given for choosing synthesis
S. N. Koreshev, D. S. Smorodinov, S. O. Starovoĭtov   +2 more
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A new method of synthesizing acoustic holograms

Proceedings of the IEEE, 1983
This letter presents a new method of synthesizing acoustical holograms, which reduces transducer arrays. The number of data, obtained without redundancy, is the product of the numbers of transmitters and receivers. An experiment demonstrates the discussion.
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Photography of an Object for Synthesizing a Composite Hologram

Journal of Applied Spectroscopy, 2001
The quality of the image recorded on a synthesized hologram with different arrangements of the cameras forming the original images is analyzed. Optimum parameters of the positioning of cameras for forming images recorded on subholograms in order to construct composite holograms with minimum distortions have been obtained.
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An arrangement of transmitter and receiver arrays for synthesizing acoustical holograms

Electronics and Communications in Japan (Part I: Communications), 1983
AbstractA method is discussed for synthesizing acoustic holograms consisting of MN pieces of data with M transmitters and N receivers in an acoustic hologram imaging system. Several methods similar to the approach presented here for reducing the total number of transmitters and receivers are examined. the distinctive feature of the proposed method lies
Keinosuke Nagai, Minoru Kimura
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Imaging of rotating objects by means of synthesized optical holograms

Optics and Spectroscopy, 2000
A scheme is presented for producing optical holograms of rotating objects by illuminating the object by a single-frequency coherent laser beam. Along one axis, the synthesis takes place due to rotation of the object; along the other axis, the hologram is synthesized by the coherent radiation field generated by a long linear optical antenna.
T. V. Bogdanova, V. P. Titar, E. Ya. Tomchuk   +2 more
openaire   +1 more source

Characterizing the steering performance of a diagnostic-therapeutic ultrasound array using measured and synthesized holograms

The Journal of the Acoustical Society of America, 2022
Acoustic holography is frequently used for the characterization of fields generated by ultrasound transducers. For arrays with electronic focusing and beam steering, separate holograms are needed to represent the 3D field for each combination of array parameters.
Randall P. Williams, Wayne Kreider, Fedor A. Nartov, Tatiana D. Khokhlova, Maria M. Karzova, Petr V. Yuldashev, Vera A. Khokhlova, Oleg A. Sapozhnikov   +7 more
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A Novel Position-Shift Method of Double-Phase Fresnel Hologram for Synthesizing a Complex Fresnel Hologram

2020
An ideal desired spatial light modulator that is capable of complex amplitude modulation will be one of the ultimate tools for holographic display. In this paper, an analytical method to overlap double-phase Fresnel holograms displayed on the phase-only spatial light modulators for synthesizing a complex Fresnel hologram is proposed.
Chuan Shen, QinQin Zhu, QingQing Hong, Cheng Zhang, Sui Wei   +4 more
openaire   +1 more source