Results 221 to 230 of about 473,711 (266)

Use of a transputer system for fast 3-D image reconstruction in 3-D PET

IEEE Transactions on Nuclear Science, 1990
A transputer system was used for fast 3-D image reconstruction in 3-D PET (positron emission tomography). The optimization of the algorithm (written in Occam language) and its parallelization on the transputer system for its use in the HISPET (high spatial resolution PET) project are discussed.
BARRESI S, BOLLINI D, DEL GUERRA, ALBERTO   +2 more
openaire   +1 more source

An omnidirectional range sensor for environmental 3-D reconstruction

2010 IEEE International Symposium on Industrial Electronics, 2010
In this paper we present a patented sensor devoted to the high precision 3D omnidirectional reconstruction. This sensor is based on the profilometer approach, but exploits a catadioptric system to get a very large field of view. After a theoretical presentation of the sensor's functionality and an analysis on its sensitivity, a designing strategy has ...
P De Ruvo, G De Ruvo, A Distante, M Nitti, E Stella, F Marino   +5 more
openaire   +3 more sources

A Multicriteria Evaluation Method for 3-D Building Reconstruction

IEEE Geoscience and Remote Sensing Letters, 2014
This letter proposes a multicriteria system to evaluate the accuracy of reconstructed 3-D buildings. Current 3-D evaluation methods are derived from 2-D pixel-based evaluation; however, the difference between 2-D and 3-D evaluation methods is not well presented in previous literature.
Chuiqing Zeng, Ting Zhao, Jinfei Wang
openaire   +1 more source

Reconstruction of 3-D Points

2002
In this chapter we shall deal with the reconstruction of three-dimensional points from a pair of projected images on two spherical surfaces. We discuss the application of the Four-dimensional Processing to this problem.
openaire   +1 more source

3-D image reconstruction with veiling glare correction to improve the contrast of 3-D reconstructed vascular images

IEEE Transactions on Nuclear Science, 1996
The authors are developing an imaging system for three-dimensional (3-D) image analysis of vascular images. The purpose is to enhance the performance of clinicians in assessing anatomical information such as the orientation of blood vessels, cross-sectional area, surface shape and volume of vascular disease. The prototype system takes measurements in a
Y. Kawata, N. Niki, T. Kumazaki
openaire   +1 more source

Image Warping for 3-D Reconstruction

2001
Many problems in medical imaging are stated in terms of parameter estimation. Given a proper parametric function local or global optimization procedures are applied to compute the best fit between the chosen model and observed measurements. The mathematical formalization of the tackled problem decides on the success of the final algorithm. We introduce
Joachim Hornegger, Carlo Tomasi
openaire   +1 more source

Computer display of reconstructed 3-D scalar data

Applied Optics, 1988
This paper addresses the problem of visualizing 3-D scalar data, initially represented as an ordered set of digital images stacked parallel to each other. An observer's ability to perceive the geometry of the structures in these data fields depends on the methods of reconstructing and displaying 3-D representations.
K, Wu, L, Hesselink
openaire   +2 more sources

Automatic reconstruction of broken 3-D surface objects

Computers & Graphics, 1999
Abstract The problem of reconstruction of broken surface objects embedded in 3-D space is handled. A coordinate independent representation for the crack curves is developed. A new robust matching algorithm is proposed which serves for finding matching pieces even when some brittle pieces are missing.
Göktürk Üçoluk, Ismail Hakki Toroslu
openaire   +1 more source

Computerized 3‐D reconstruction of two “double teeth”

Dental Traumatology, 1997
Abstract “Double teeth” is a root malformation in the dentition and the purpose of this study was to reconstruct three‐dimensionally the external and internal morphology of two “double teeth”. The first set of “double teeth” was formed by the conjunction of a mandibular molar and a premolar, and the second by a conjunction of a maxillary molar and a ...
K, Lyroudia, G, Mikrogeorgis, N, Nikopoulos, G, Samakovitis, I, Molyvdas, I, Pitas   +5 more
openaire   +2 more sources

Improving stereotactic surgery using 3-D reconstruction

IEEE Engineering in Medicine and Biology Magazine, 2002
In brain surgery, placing a microelectrode from the outer brain to the specific target becomes a new medical resource-reduced technology to alleviate Parkinson's disease. During the operation, the brain atlas is an important and auxiliary tool that cannot completely describe the real brain structure of the patient.
Jiann-Der, Lee, Chung-Hsien, Huang, Shih-Tseng, Lee   +2 more
openaire   +2 more sources