نتایج جستجو برای: structured material

تعداد نتایج: 490108  

Journal: :New Journal of Physics 2017

2000
Danijel Skocaj Ales Leonardis

We present a novel approach to acquisition of range images of objects with non-uniform albedo using a structured light sensor. The main idea is to systematically vary the intensity of the light projector and to form high dynamic scale radiance maps. The range images are then formed from these radiance maps. We tested the method on the objects which have surfaces with very different reflectance ...

Journal: :JCP 2007
Erik Lilienblum Bernd Michaelis

One problem of classical phase shifting for optical 3D surface reconstruction is the occurrence of ambiguities due to the use of fringe projection. We generally derive a number-theoretical approach to calculate absolute phase measurements which can be used as a base for a reliable surface reconstruction without any ambiguity. The essence of our method is the application of pattern sequences wit...

2001

This paper deals with self-calibration and its adaptation to structured light vision. A brief survey on selfcalibration for stereovision is first proposed. Then, after having described the geometry of a structured light sensor and the constraints it imposes, a method based on the generation of Euclidean constraints is detailed. It is mainly shown how the projection of a known pattern is used to...

1999
David Fofi El Mustapha Mouaddib Joaquim Salvi

With the aim of providing our structured light sensor with adaptive capabilities, an uncalibrated reconstruction method is presented here. It allows us to simultaneously determine the projection matrices and the co-ordinates of 3-D points in a projective frame by only using pixel correspondences. Then, by translating geometrical knowledge about the scene into mathematical constraints, an Euclid...

2007
David Budgen Barbara A. Kitchenham Stuart M. Charters Mark Turner Pearl Brereton Stephen G. Linkman

CONTEXT: Systematic literature reviews largely rely upon using the titles and abstracts of primary studies as the basis for determining their relevance. However, our experience indicates that the abstracts for software engineering papers are frequently of such poor quality they cannot be used to determine the relevance of papers. Both medicine and psychology recommend the use of structured abst...

Journal: :Angewandte Chemie 2006
Daniel Moore Yong Ding Zhong Lin Wang

Wurtzite-structured materials, such as ZnO, ZnS, GaN, and AlN, have an important characteristic: the presence of polar surfaces that result from cationor anion-terminated atomic planes. Consequently, a series of novel nanostructures, such as nanosprings, nanorings, nanohelices, and nanobows, have been formed. The mechanism that drives the formation of these novel configurations minimizes the el...

Journal: :jentashapir journal of health research 0
nasibeh kor leila m akram sanagoo akram sanagoo akram sanagoo

background using home remedies has a long history among many of ethnic groups. the turkmen people have their own special home remedies too. the aim of this research was to study beliefs and behaviors of the turkmen people of golestan province about dysmenorrhea remedies. material and methods in this micro-medical ethnography study using purposeful sampling, the semi-structured interviews conduc...

2005
Mark Mudge Jean-Pierre Voutaz Carla Schroer Marlin Lum

Reflection transformation imaging offers a powerful new method of documenting and communicating numismatic cultural heritage information. The challenges of documenting numismatic material will be examined along with the limitations of traditional documentary techniques. Previous uses of structured light scanning and PTMs in numismatic documentation are reviewed and evaluated. A novel, low cost ...

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