Depth-fused Display for Expression of Objects with Large Depth Range

2016 ◽  
Author(s):  
Soon-gi Park ◽  
Yuta Yamaguchi ◽  
Junya Nakamura ◽  
Byoungho Lee ◽  
Yasuhiro Takaki
Keyword(s):  
Depth Range ◽  
Large Depth

scholarly journals High-resolution optical coherence tomography over a large depth range with an axicon lens

2002 ◽  
Vol 27 (4) ◽  
pp. 243 ◽  
Author(s):  
Zhihua Ding ◽  
Hongwu Ren ◽  
Yonghua Zhao ◽  
J. Stuart Nelson ◽  
Zhongping Chen
Keyword(s):  
Optical Coherence Tomography ◽  
High Resolution ◽  
Depth Range ◽  
Optical Coherence ◽  
Large Depth

scholarly journals Guided, Fusion-Based, Large Depth-of-field 3D Imaging Using a Focal Stack

Sensors ◽  
2019 ◽  
Vol 19 (22) ◽  
pp. 4845 ◽  
Author(s):  
Yuhao Xiao ◽  
Guijin Wang ◽  
Xiaowei Hu ◽  
Chenbo Shi ◽  
Long Meng ◽  
...  
Keyword(s):  
3D Imaging ◽  
Depth Map ◽  
Shape Measurement ◽  
Depth Range ◽  
High Quality ◽  
Large Depth ◽  
3D Shape ◽  
3D Shape Measurement ◽  
Working Volume ◽  
Focal Stack

Three dimensional (3D) imaging technology has been widely used for many applications, such as human–computer interactions, making industrial measurements, and dealing with cultural relics. However, existing active methods often require both large apertures of projector and camera to maximize light throughput, resulting in a shallow working volume in which projector and camera are simultaneously in focus. In this paper, we propose a novel method to extend the working range of the structured light 3D imaging system based on the focal stack. Specifically in the case of large depth variation scenes, we first adopted the gray code method for local, 3D shape measurement with multiple focal distance settings. Then we extracted the texture map of each focus position into a focal stack to generate a global coarse depth map. Under the guidance of the global coarse depth map, the high-quality 3D shape measurement of the overall scene was obtained by local, 3D shape-measurement fusion. To validate the method, we developed a prototype system that can perform high-quality measurements in the depth range of 400 mm with a measurement error of 0.08%.

High resolution axicon-based endoscopic FD OCT imaging with a large depth range

2010 ◽  
Author(s):  
Kye-Sung Lee ◽  
William Hurley ◽  
John Deegan ◽  
Scott Dean ◽  
Jannick P. Rolland
Keyword(s):  
High Resolution ◽  
Depth Range ◽  
Large Depth ◽  
Oct Imaging

scholarly journals High-frequency color-encoded fringe-projection profilometry based on geometry constraint for large depth range

2020 ◽  
Vol 28 (9) ◽  
pp. 13043
Author(s):  
Yingying Wan ◽  
Yiping Cao ◽  
Xinran Liu ◽  
Tianyang Tao ◽  
Jonathan Kofman
Keyword(s):  
High Frequency ◽  
Fringe Projection ◽  
Depth Range ◽  
Large Depth ◽  
Fringe Projection Profilometry

scholarly journals Northern extension of Lesueurigobius friesii (Malm, 1874) (Pisces: Gobiidae) distribution and the gobiid diversity decline along the Norwegian coast

2019 ◽  
Vol 60 (2) ◽  
pp. 147-156
Author(s):  
Marcelo Kovačić ◽  
Rudolf Svensen
Keyword(s):  
Structural Change ◽  
Species Diversity ◽  
Species Traits ◽  
Shelf Break ◽  
Breaking Point ◽  
Depth Range ◽  
Latitude Band ◽  
Large Depth ◽  
Norwegian Coast ◽  
Significant Regression

Lesueurigobius friesii was collected in Eidsfjorden, Sognefjorden, Norway, extending its known distribution range north as the new northernmost locality of this species. Globally, the northernmost presence of gobies is along the coast of Norway. Their diversity along the Norwegian coast showed an evident latitude gradient of gobiid diversity with a clear decrease from south to north. The significant regression structural change was found at the 63/64° N latitude band followed by a 36.4% decrease in gobiid species diversity. The species traits of gobiids north of the regression breaking point and those restricted to the south of it were compared. The only significantly more frequent characteristic of species passing north of the regression breaking point is the large depth range that reach down to the shelf break. All species present north of the point, except Thorogobius ephippiatus (that barely passes it) belong to Oxudercinae (i.e. to Pomatoschistuslineage of that subfamily).

Study on Paleoecology of Late Pennsylvanian Phylloid Algae in South Guizhou, China

2011 ◽  
Vol 183-185 ◽  
pp. 180-183
Author(s):  
Li Li Yang ◽  
En Pu Gong
Keyword(s):  
Chemical Defense ◽  
Depth Range ◽  
Dense Networks ◽  
Large Depth ◽  
Rate Of Growth ◽  
Algae Growth ◽  
Phylloid Algae ◽  
Improve Rate

Pennsylvanian phylloid algal reefs are widespread and well exposed in south Guizhou, China. Dense networks of closely living phylloid algae induced community restriction on seafloor and organisms seldom survived in such environment. Algal reefs in Guizhou differ from examples reported to date by high biodiversity. This contrasts to the “poisoning hypothesis” and chemical defense was not pronounced. Phylloid algae were able to thrive over a large depth range. Delicate framework formed by upright blades often occurred in calm deepen waters. Blades became larger and fleshy in moderately agitated environment and formed isolated, wide, cup-shaped framework. Large blade size could capture much more sunlight to improve rate of growth and calcification. But successive progressively shallower water may have arrested phylloid algae growth. Thinner, small blades grew closely packed and juxtaposed near and above one another in a wave-dominant environment, producing dense framework clusters to prevent wave destruction.

Anisotropy of Nanoindentation – a tool for the determination of nanocrystal orientation ?

2003 ◽  
Vol 779 ◽  
Author(s):  
David Christopher ◽  
Steven Kenny ◽  
Roger Smith ◽  
Asta Richter ◽  
Bodo Wolf ◽  
...  
Keyword(s):  
Crystal Surface ◽  
Scanning Force Microscopy ◽  
Depth Range ◽  
Dislocation Loops ◽  
Force Microscopy ◽  
Pile Up ◽  
Out Of Plane ◽  
Scanning Force ◽  
Dynamics Simulations

AbstractThe pile up patterns arising in nanoindentation are shown to be indicative of the sample crystal symmetry. To explain and interpret these patterns, complementary molecular dynamics simulations and experiments have been performed to determine the atomistic mechanisms of the nanoindentation process in single crystal Fe{110}. The simulations show that dislocation loops start from the tip and end on the crystal surface propagating outwards along the four in-plane <111> directions. These loops carry material away from the indenter and form bumps on the surface along these directions separated from the piled-up material around the indenter hole. Atoms also move in the two out-of-plane <111> directions causing propagation of subsurface defects and pile-up around the hole. This finding is confirmed by scanning force microscopy mapping of the imprint, the piling-up pattern proving a suitable indicator of the surface crystallography. Experimental force-depth curves over the depth range of a few nanometers do not appear smooth and show distinct pop-ins. On the sub-nanometer scale these pop-ins are also visible in the simulation curves and occur as a result of the initiation of the dislocation loops from the tip.

GEOPHYSICAL AND WATER QUALITY INDEX SURVEYS OF GROUNDWATER QUALITY AROUND UGBOR DUMPSITE IN BENIN CITY, EDO STATE, NIGERIA, WEST AFRICA.

2016 ◽  
Vol 12 (3) ◽  
pp. 4383-4393
Author(s):  
Osabuohien Idehen
Keyword(s):  
Water Quality ◽  
Groundwater Quality ◽  
Water Quality Index ◽  
Quality Index ◽  
Dry Season ◽  
Depth Range ◽  
Benin City ◽  
Physico Chemical ◽  
Vertical Electric Sounding ◽  
Geoelectric Layer

This study takes a look into groundwater quality at Ugbor Dumpsite area using water quality index (WQI), 2-Dimensional (2-D) geophysical resistivity tomography and vertical electric sounding (VES).The geophysical resistivity methods employed revealed the depth to aquifer, the geoelectric layers being made up of lateritic topsoil, clayed sand and sand. Along the trasverse line in the third geoelectric layer of lateral distance of 76 m to 100 m is a very low resistivity of 0.9 to 13 m from a depth range o f about 3 to 25 m beneath the surface- indicating contamination. Water samples were collected and analyzed at the same site during the raining season and during the dry season. The value of water quality index during the raining season was 115.92 and during the dry season was 147.43. Since values at both seasons were more than 100, it implies that the water is contaminated to some extent and therefore poor for drinking purpose. The Water Quality Index was established from important analyses of biological and physico-chemical parameters with significant health importance. These values computed for dumpsite area at Ugbor were mostly contributed by the seasonal variations in the concentrations of some parameters, such as, conductivity, total dissolved solids, hardness, alkalinity, chlorides, nitrates, calcium,  phosphates, zinc, which showed significant differences (P<0.01 and P<0.05) in seasonal variation.

Boron-Nitrogen Doped Dihydroindeno[1,2-b]fluorene Derivatives as Acceptors in Organic Solar Cells

2019 ◽  
Author(s):  
Matthew Morgan ◽  
Maryam Nazari ◽  
Thomas Pickl ◽  
J. Mikko Rautiainen ◽  
Heikki M. Tuononen ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Organic Solar Cells ◽  
Organic Solar Cell ◽  
Broad Absorption ◽  
Nitrogen Doped ◽  
Large Depth ◽  
End Products ◽  
Boron Nitrogen ◽  
The Way

The electrophilic borylation of 2,5-diarylpyrazines results in the formation of boron-nitrogen doped dihydroindeno[1,2-<i>b</i>]fluorene which can be synthesized via mildly air-sensitive techniques and the end products handled readily under atmosphereic conditions. Through transmetallation via diarylzinc reagents a series of derivatives were sythesized which show broad absorption profiles that highlight the versatility of this backbone to be used in organic solar cell devices. These compounds can be synthesized in large yields, in alow number of steps and functionalized at many stages along the way providing a large depth of possibilities. Exploratory device paramaters were studied and show PCE of 2%.

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