Zobrazeno 1 - 10
of 11
pro vyhledávání: '"Adam Greengard"'
Publikováno v:
Classical Optics 2014.
Designers of advanced digital imaging systems are frequently challenged with considering not only the optics and sensor, but also the effects of image processing in the selection of the best architecture to meet their system objectives. Leveraging th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c88b01d0f4cb6ab280466c2a1e3cd694
https://doi.org/10.1364/iodc.2014.im2a.1
https://doi.org/10.1364/iodc.2014.im2a.1
Publikováno v:
SPIE Proceedings.
A foveated imager providing a panoramic field of view with simultaneous region of interest optical zoom for use on a micro unmanned aerial vehicle is described. The foveated imager reduces size, weight and power by imaging both wide and telephoto fie
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d38e577a1cd07c023d9ca65a8ce3681a
https://doi.org/10.1117/12.919472
https://doi.org/10.1117/12.919472
Autor:
Adam Greengard, Rob Bates
Publikováno v:
SPIE Proceedings.
Several methods have been demonstrated for desensitization of a lens design to manufacturing errors with the result of increased as-built performance at the expense of a slightly reduced nominal performance. A recent study demonstrated a targeted des
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a651f1cd75b3c3d82628c3acc3f56814
https://doi.org/10.1117/12.895111
https://doi.org/10.1117/12.895111
Publikováno v:
Optics letters. 31(2)
The accuracy of depth estimation based on defocus effects has been essentially limited by the depth of field of the imaging system. We show that depth estimation can be improved significantly relative to classical methods by exploiting three-dimensio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ee3cce6941154d8566184a5a975e8cb3
https://pubmed.ncbi.nlm.nih.gov/16441023
https://pubmed.ncbi.nlm.nih.gov/16441023
Autor:
Adam Greengard, Rafael Piestun
Publikováno v:
Frontiers in Optics.
We discuss approaches for retrieving three-dimensional information using diffraction in passive coherent and incoherent computational sensing systems. We demonstrate the localization of objects with accuracy exceeding the limitations of classical dif
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::920735eb5576502aab73fef3d6746763
https://doi.org/10.1364/fio.2006.fmi1
https://doi.org/10.1364/fio.2006.fmi1
Autor:
Rafael Piestun, Adam Greengard
Publikováno v:
Adaptive Optics: Analysis and Methods/Computational Optical Sensing and Imaging/Information Photonics/Signal Recovery and Synthesis Topical Meetings on CD-ROM.
We evaluate the Fisher information of rotating point spread functions with respect to depth and show that it exceeds that of a standard system. These findings are applied to depth estimation from 2-D images.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1eeb07a4f5ba497a6c5dc8fce0158808
https://doi.org/10.1364/cosi.2005.cma1
https://doi.org/10.1364/cosi.2005.cma1
Autor:
Rafael Piestun, Adam Greengard
Publikováno v:
Frontiers in Optics.
We discuss novel approaches for three-dimensional image data acquisition using engineered point spread functions. We focus on passive, single and multi-image systems and present a system for depth estimation using a rotating impulse response.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::55535ea11eff1c82a2930ca500f32de9
https://doi.org/10.1364/fio.2005.ftut1
https://doi.org/10.1364/fio.2005.ftut1
Publikováno v:
Optical Information Systems II.
We present a method for passive ranging with incoherent light. The scheme uses a single optical channel and is particularly suitable for locating and ranging particles. Our aim is to create an optical system with increased discrimination among depth
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9234f9673bb4690ef887b2659d86d854
https://doi.org/10.1117/12.560169
https://doi.org/10.1117/12.560169
Publikováno v:
Computational Imaging
Imaging systems using aspheric imaging lenses with complementary computation can deliver performance unobtainable in conventional imaging systems. These new imaging systems, termed Wavefront coded imaging systems, use specialized optics to capture a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6bde67a535584b2e7930809d663a430e
https://doi.org/10.1117/12.527033
https://doi.org/10.1117/12.527033
Autor:
W. Thomas Cathey, Adam Greengard
Publikováno v:
Applied optics. 41(29)
Presented here are experimental results of an extended depth-of-field (EDF) system using film to record the image. The EDF system used is an application of wave-front coding. A phase mask is placed in the aperture stop of the lens to code the image d
Externí odkaz:
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https://pubmed.ncbi.nlm.nih.gov/12389976
https://pubmed.ncbi.nlm.nih.gov/12389976