Results 21 to 30 of about 3,465,798 (241)

Three-dimensional block matching using orthonormal tree-structured haar transform for multichannel images [PDF]

open access: yes, 2020
Multichannel images, i.e., images of the same object or scene taken in different spectral bands or with different imaging modalities/settings, are common in many applications.
Ito, Izumi, Pizurica, Aleksandra
core   +1 more source

Three dimensional (3D) imaging techniques in orthodontics-An update

open access: yesJournal of Family Medicine and Primary Care, 2020
3D imaging is a technique which develops or creates the impression of depth within an image by deploying 2D data into 3-dimensional format. To aid in quality regulating processes for industrial purposes, 3D imaging has become an extremely valuable factor.
Fahad Abdullah Alshammery
doaj   +1 more source

Phaseless three-dimensional optical nano-imaging [PDF]

open access: yes, 2009
We propose a method for optical nano-imaging in which the structure of a three-dimensional inhomogeneous medium may be recovered from far-field power measurements.
Govyadinov, Alexander A.   +2 more
core   +3 more sources

Optimizing Image Focus for Shape From Focus Through Locally Weighted Non-Parametric Regression

open access: yesIEEE Access, 2019
Shape from focus is a passive optical technique that uses multiple images with different focus levels. To compute the sharpness of each pixel in the image sequence, obtained by translating the object plane at a constant step size along the optical axis ...
Hoon-Seok Jang   +2 more
doaj   +1 more source

General theorem of spatial coherence: application to three-dimensional imaging [PDF]

open access: yes, 1996
Three-dimensional imaging of incoherent light sources by the Michelson stellar interferometer is considered. When the interferometer’s pinholes are arranged properly, its output result is equivalent to a two-dimensional Fourier hologram that stores ...
Rosen, Joseph, Yariv, Amnon
core   +1 more source

Jitter Elimination in Shape Recovery by using Adaptive Neural Network Filter

open access: yesSensors, 2019
Three-dimensional (3D) cameras are expensive because they employ additional charged coupled device sensors and optical elements, e.g., lasers or complicated scanning mirror systems.
Sung-An Lee   +2 more
doaj   +1 more source

Three dimensional acoustic imaging technology of buried object detection [PDF]

open access: yesMATEC Web of Conferences, 2019
With the development of 21th century seabed imaging sonar technology, more and more attention is paid to buried object detection technology in the world.
Cong Weihua, Zhou Lisheng
doaj   +1 more source

Single shot three-dimensional imaging of dilute atomic clouds [PDF]

open access: yes, 2014
Light field microscopy methods together with three dimensional (3D) deconvolution can be used to obtain single shot 3D images of atomic clouds. We demonstrate the method using a test setup which extracts three dimensional images from a fluorescent $^{87}$
Kasevich, Mark, Sakmann, Kaspar
core   +2 more sources

Correlation Plenoptic Imaging With Entangled Photons

open access: yesTechnologies, 2016
Plenoptic imaging is a novel optical technique for three-dimensional imaging in a single shot. It is enabled by the simultaneous measurement of both the location and the propagation direction of light in a given scene.
Francesco V. Pepe   +4 more
doaj   +1 more source

Multiscale three-dimensional imaging of the placenta.

open access: yesPlacenta, 2020
Placental function involves multiple different processes which operate at different scales from centimetres to nanometres. Everything that the placenta does from mediating blood flow to gene expression, occurs within a three-dimensional anatomical ...
Rohan M. Lewis, J. Pearson-Farr
semanticscholar   +1 more source

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