Results 201 to 210 of about 4,561,615 (259)

Digital reconstruction of nonlinear beam propagation

2008 Conference on Lasers and Electro-Optics, 2008
We extend the technique of digital holography to the case of propagation through nonlinear media. We experimentally verify the technique by reconstructing nonlinear wave dynamics within a self-defocusing medium and nonlinearly imaging through it.
Christopher Barsi, Wenjie Wan, Jason W. Fleischer   +2 more
openaire   +1 more source

Digital Reconstruction of large horizontal parallax digital holograms

Imaging and Applied Optics Congress, 2020
An Angular Spectrum-based method that allows for reconstruction of digital holograms having large horizontal parallax is developed. It has high efficiency of calculations in terms of speed and memory used. Experimental verification is provided.
Tomasz Kozacki, Weronika Finke, Juan Martinez-Carranza   +2 more
openaire   +1 more source

Digital Outcrop Model Reconstruction and Interpretation

2022
Collecting quantitative and extensive datasets in the field is fundamental in structural geology, stratigraphy, and sedimentology, rock mechanics, and in other fields of the Earth and planetary sciences. Digital Outcrop Models (DOMs) provide a 3D framework for collecting these large datasets and can be obtained from laser scanning or photogrammetric ...
Bistacchi, Andrea, Mittempergher, Silvia, Martinelli, Mattia   +2 more
openaire   +1 more source

Digital Reconstruction of Axially Thick Potentials

Conference on Lasers and Electro-Optics/International Quantum Electronics Conference, 2009
The holographic reconstruction of objects typically assumes that the object is axially thin. Here, we demonstrate a simple approach that works for axially-thick potentials which evolve dynamically. Results are verified by reconstructing linear scattering experiments.
Christopher Barsi, Jason W. Fleischer
openaire   +1 more source

Uniformly redundant arrays: digital reconstruction methods

Applied Optics, 1981
Several new digital reconstruction techniques for coded aperture imaging are developed which are especially applicable to uniformly redundant arrays (URAs). The techniques provide improved resolution without upsetting the artifact-free nature of URAs.
E E, Fenimore, T M, Cannon
openaire   +2 more sources

Point-based digitally reconstructed radiograph

2008 19th International Conference on Pattern Recognition, 2008
In this paper, we present a novel point-based digitally reconstructed radiography (PBDRR) method for large CT data sets. Three steps are mainly included in the proposed method, namely point sampling, point rendering and quantization. Finite samples are determined on the nature or user-specified transfer function by a Monte Carlo technique.
Aodong Shen, Limin Luo
openaire   +1 more source

Reconstruction of Congenital Aplasia of Digits

Surgical Clinics of North America, 1981
Reconstruction of partial digital aplasia with one border digit is attainable in young patients. It requires construction or transplantation of a stable part with functional sensibility to permit pinch and grasp. Toe transplants provide these functions relatively rapidly but carry a certain risk of failure and add a new deformity to the foot.
openaire   +2 more sources

Partial-spectrum-reconstruction digital filter banks

1993 IEEE International Symposium on Circuits and Systems, 2002
Practical design methods for partial-spectrum-reconstruction (PSR) filter banks are presented. The filters are the discrete-Fourier-transform (DFT) or the discrete-cosine-transform (DCT) versions of prototype filters. The prototype filters are designed to minimize aliasing and distortions at the output. The proposed technique is extended to system with
openaire   +1 more source

Advances In Reconstruction Of Digital Joints

Clinics in Plastic Surgery, 1997
The recent development of dynamic traction provides several advantages for the treatment of intra-articular fractures of the hand: Ligamentotaxis reduces fracture fragments and realigns joint surfaces, Contracture of joint ligament and periarticular structures is prevented, Collapse of fracture fragments is prevented, Cartilage healing and regeneration
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Digitizing and reconstructing images

1991
Before an analogue image can be processed by computer it must first be digitized, or expressed as an array of numbers. The digitizing process can be divided into three phases: a) The image area is scanned by an aperture or spot. By definition this is finite in size, and simultaneously acts as a low-pass prefilter (attenuating the higher spatial ...
openaire   +1 more source