Results 21 to 30 of about 2,006,423 (241)

Copyright protection of deep image classification models

open access: yesКомпьютерная оптика, 2023
With the growing number of tasks solved using deep learning methods, the need for protection against unauthorized distribution of the intellectual property such as pre-trained models of deep neural networks is growing.
Y.D. Vybornova, D.I. Ulyanov
doaj   +1 more source

Imaging properties of computer-generated holograms: the phase distribution effect in the objects’ space

open access: yesSt. Petersburg Polytechnical University Journal: Physics and Mathematics, 2020
In the paper, the influence of phase distribution over the objects’ space on resolution and depth of field of computer-generated holograms has been investigated.
Koreshev Sergey   +3 more
doaj   +1 more source

Maskless imaging of dense samples using pixel super-resolution based multi-height lensfree on-chip microscopy. [PDF]

open access: yes, 2012
Lensfree in-line holographic microscopy offers sub-micron resolution over a large field-of-view (e.g., ~24 mm2) with a cost-effective and compact design suitable for field use. However, it is limited to relatively low-density samples.
Greenbaum, Alon, Ozcan, Aydogan
core   +1 more source

Monochrome Image Hologram (MIH)

open access: yesمجلة بغداد للعلوم, 2008
A new computer-generated optical element called a monochrome image hologram (MIH) is described. A real nonnegative function to represent the transmittance of a synthesized hologram is used.
Baghdad Science Journal
doaj   +1 more source

Experimental demonstration of holographic three-dimensional light shaping using a Gerchberg-Saxton algorithm [PDF]

open access: yes, 2005
We use a three-dimensional Gerchberg–Saxton algorithm (Shabtay (2003) Opt. Commun. 226 33) to calculate the Fourier-space representation of physically realizable light beams with arbitrarily shaped three-dimensional intensity distributions.
Courtial, J., Whyte, G.
core   +3 more sources

Synthesizing Incoherent Digital Holograms with Reduced Number of Projections [PDF]

open access: yesBiomedical Optics, 2008
We present a method of recording digital Fourier holograms under incoherent illumination, using a significantly reduced number of observed perspective projections and a digital prediction of the middle projections. The method is demonstrated experimentally.
Barak Katz   +2 more
openaire   +1 more source

Efficient calculation scheme for high pixel resolution non-hogel-based computer generated hologram from light field.

open access: yesOptics Express, 2020
We propose a method that reduces the computation time and memory requirement in non-hogel-based hologram synthesis from light field data. The non-hogel-based technique synthesizes coherent complex field for a three-dimensional scene from its light field.
Jae-Hyeung Park
semanticscholar   +1 more source

Holographic opto-fluidic microscopy. [PDF]

open access: yes, 2010
Over the last decade microfluidics has created a versatile platform that has significantly advanced the ways in which micro-scale organisms and objects are controlled, processed and investigated, by improving the cost, compactness and throughput aspects ...
Bishara, Waheb   +2 more
core   +1 more source

Digital Holography at Shot Noise Level [PDF]

open access: yes, 2010
By a proper arrangement of a digital holography setup, that combines off-axis geometry with phase-shifting recording conditions, it is possible to reach the theoretical shot noise limit, in real-time experiments.We studied this limit, and we show that it
Atlan, Michael   +3 more
core   +7 more sources

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