Zobrazeno 1 - 10
of 15
pro vyhledávání: '"Kyu B. Doh"'
Autor:
Ting-Chung Poon, Yoshiji Suzuki, Kyu B. Doh, Kazunori Shinoda, Bradley W. Schilling, Ming Hsien Wu
Publikováno v:
Optical Review. 4:567-571
Three-dimensional (3-D) or holographic information extracted by two-dimensional active optical heterodyne scanning has been demonstrated recently. The technique is called optical scanning holography. To reconstruct the obtainable 3-D holographic info
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f7b5c105e33fb22a0e12b6dc16017147
https://doi.org/10.1007/s10043-997-0567-2
https://doi.org/10.1007/s10043-997-0567-2
Publikováno v:
Optics & Laser Technology. 28:135-141
We propose a novel multiplexing technique to solve the twin image problem in optical scanning holography without the use of a spatial carrier, as commonly used in conventional off-axis holography. The technique involves simultaneously acquiring sine
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a633f14695869e2d28383372d7b00060
https://doi.org/10.1016/0030-3992(95)00073-9
https://doi.org/10.1016/0030-3992(95)00073-9
Autor:
Kyu B. Doh, Ting-Chung Poon
Publikováno v:
Optics express. 15(6)
The Hilbert transform as been investigated abundantly in coherent imaging. To the best of our knowledge, it is for the first time investigated in the context of incoherent imaging. We present a two-pupil optical heterodyne scanning system and analyze
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4f3ed9aec3f761e5daa8b0ac020a8fce
https://pubmed.ncbi.nlm.nih.gov/19532539
https://pubmed.ncbi.nlm.nih.gov/19532539
Publikováno v:
Applied optics. 48(1)
A circular Dammann grating in the front focal plane of a lens is used to generate an annular beam in the back focal plane to code an object by two-dimensional scanning. The coded image of the object is decoded digitally by convolving it with the same
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::be3f2869e22eba5285b2a1640b6fe898
https://pubmed.ncbi.nlm.nih.gov/19107182
https://pubmed.ncbi.nlm.nih.gov/19107182
Publikováno v:
Computational Intelligence and Security ISBN: 9783540308195
CIS (2)
CIS (2)
We describe a technique for image verification by use of real-time joint transform correlation with scanning technique. The described method is independent of a spatial light modulator (SLM) in the Fourier plane which has limitations for applying to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::40a271cab877bb9d72e4327fa65e1510
https://doi.org/10.1007/11596981_114
https://doi.org/10.1007/11596981_114
Publikováno v:
Computational and Information Science ISBN: 9783540241270
CIS
CIS
An information security method is presented by use of electro-optic cryptosystem. We investigate Fourier plane random phase encoding technique, a random phase coding, and holographic coding. The proposed cryptosystem is based on those combined coding
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a32f30b1aa383d035c80054b43bdec31
https://doi.org/10.1007/978-3-540-30497-5_127
https://doi.org/10.1007/978-3-540-30497-5_127
Publikováno v:
Parallel and Distributed Computing: Applications and Technologies ISBN: 9783540240136
PDCAT
PDCAT
We propose a method for information security technique using computer generated holographic image processing. Using encryption key factors, computer generated holographic image and Fourier plane phase mask, an image or document to be secured is encry
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fd6807edf06321e227e47ae72cb45f61
https://doi.org/10.1007/978-3-540-30501-9_26
https://doi.org/10.1007/978-3-540-30501-9_26
Publikováno v:
Applied optics. 42(32)
We propose a method for secure wireless transmission of encrypted information. By use of an encryption key, an image or document is optically encrypted by optical heterodyne scanning and hence encryption is performed on the fly. We call this techniqu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::da7be95f3320a75b2c582da440f9d747
https://pubmed.ncbi.nlm.nih.gov/14650492
https://pubmed.ncbi.nlm.nih.gov/14650492
Autor:
Hui-Sung Kim, Kyu B. Doh
Publikováno v:
SPIE Proceedings.
Absolute optical angle sensor is described that is an essentially digital opto-electronic device. Its purpose is to resolve the relative and absolute angle position of coded disk using Pseudo-random-code and Triangle-code. In this technique, the angu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e00152d3affc1e8e10f0b6e488dad8eb
https://doi.org/10.1117/12.456520
https://doi.org/10.1117/12.456520
Autor:
Ming Hsien Wu, Ting-Chung Poon, Bradley W. Schilling, Yoshiji Suzuki, Kazunori Shinoda, Kyu B. Doh
Publikováno v:
SPIE Proceedings.
We first review a newly developed 3D imaging technique called optical scanning holography (OSH), and discuss recording and reconstruction of a point object using the principle of OSH. We then derive 3D holographic magnification, using three points co
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a1c3fac57bd7b6c96e325eeb1a79319f
https://doi.org/10.1117/12.205342
https://doi.org/10.1117/12.205342