Development of a high resolution pattern projection system using linescan cameras

2009 ◽  
Author(s):  
B. Denkena ◽  
P. Huke
Keyword(s):  
High Resolution ◽  
Projection System ◽  
Pattern Projection

Two-panel LCOS-based projection system: a potentially compact high-resolution avionics display

2003 ◽  
Author(s):  
Gary D. Sharp ◽  
Jianmin Chen ◽  
Michael B. Robinson ◽  
John K. Korah
Keyword(s):  
High Resolution ◽  
Projection System ◽  
System A

scholarly journals Variable Curvature Displays: Optical Designs and Applications for VR/AR/MR Headsets

2020 ◽  
Vol 10 (2) ◽  
pp. 712
Author(s):  
Eduard Muslimov ◽  
Thibault Behaghel ◽  
Emmanuel Hugot ◽  
Kelly Joaquina ◽  
Ilya Guskov
Keyword(s):  
Virtual Reality ◽  
High Resolution ◽  
Field Of View ◽  
Projection System ◽  
Object Position ◽  
Focal Surface ◽  
Variable Curvature ◽  
Starting Point ◽  
Low Distortion ◽  
Aberration Theory

In the present paper, we discuss the design of a projection system with curved display and its enhancement by variably adjusting the curvature. We demonstrate that the focal surface curvature varies significantly with a change of the object position and that it can easily be computed with the Seidel aberration theory. Using this analytically derived curvature value as the starting point, we optimise a refocusable projection system with 90 ° field of view and F / # = 6.2 . It is demonstrated that such a system can provide stable image quality and illumination when refocusing from infinity to 1.5 m. The gain in spatial resolution is as high as 1.54 times with respect to a flat focal surface. Furthermore, we prove that a silicon die can be curved to the required shape with a safety factor of 4.3 in terms of the mechanical stress. Finally, it is shown that the developed system can be used in a virtual reality headset providing high resolution, low distortion and a flexible focusing mode.

Estimating future changes in Alpine flash floods using CP-RCM projections

2020 ◽  
Author(s):  
Frederiek Sperna Weiland ◽  
Pety Viguurs ◽  
Marjanne Zander ◽  
Albrecht Weerts
Keyword(s):  
Climate Change ◽  
High Resolution ◽  
Climate Models ◽  
Regional Climate ◽  
Flash Floods ◽  
Climate Prediction ◽  
Alpine Region ◽  
Parameter Estimates ◽  
Projection System ◽  
The Alps

<p><span>Flash floods are a significant natural hazard in the Alpine region (FOEN, 2010). With changing rainfall regimes and decreased snow accumulation due to climate change, the risk of flash flood occurrence and timing thereof could change as well (Etchevers et al., 2002).</span></p><p><span>In this study the frequency and occurrence of flash floods in the Alpine region is estimated for current and future climate (RCP8.5) using state-of-the-art high-resolution convection permitting climate models (CP-RCMs). For the historical period and far future (2100), data from an ensemble of convection permitting climate models (Ban et al., submitted 2019) was used to drive a high-resolution distributed hydrological model, i.e. the wflow_sbm model (Imhoff et al., 2019, Verseveld et al., 2020). The model domains cover the mountainous parts of the Danube, Rhone, Rhine and Po located in the Alps.  The CP-RCM time-series available are of limited length due to computational constrains. At the same time the locations of flash floods vary per year therefore a regional scale analysis is made to assess whether in general the severity, frequency and timing of flash floods in the Alps will likely change under changing climate conditions.</span></p><p><span>This research is embedded in the EU H2020 project EUCP (EUropean Climate Prediction system) (https://www.eucp-project.eu/), which aims to support climate adaptation and mitigation decisions for the coming decades by developing a regional climate prediction and projection system based on high-resolution climate models for Europe.</span></p><p>References:</p><p>Etchevers, P.<span>, </span>Golaz, C.<span>, </span>Habets, F.<span>, and </span>Noilhan, J.<span>, </span>Impact of a climate change on the Rhone river catchment hydrology<span>, J. Geophys. Res., 107( D16), doi:, 2002. </span></p><p><span>Federal office for the environment FOEN (2010) Environment Switzerland 2011, Bern and Neuchatel 2011. Retrieved from www.environment-stat.admin.ch</span></p><p><span>Imhoff, R.O., W. van Verseveld, B. van Osnabrugge, A.H. Weerts, 2019. Scaling point-scale pedotransfer functions parameter estimates for seamless large-domain high-resolution distributed hydrological modelling: An example for the Rhine river. Submitted to Water Resources Research, 2019.</span></p><p><span>N. Ban, E. Brisson, C. Caillaud, E. Coppola, E. Pichelli, S. Sobolowski, …, M.J. Zander (submitted 2019): “The first multi-model ensemble of regional climate simulations at the kilometer-scale resolution, Part I: Evaluation of precipitation”, manuscript submitted for publication.</span></p>

scholarly journals Irritation-free pattern projection system for accurate 3D face and body scans

2018 ◽  
Vol 1044 ◽  
pp. 012040
Author(s):  
G Notni ◽  
C Bräuer-Burchardt ◽  
S Heist ◽  
A Brahm ◽  
P Kühmstedt
Keyword(s):  
Projection System ◽  
3D Face ◽  
Pattern Projection

scholarly journals High-resolution VSDI retinotopic mapping via a DLP-based projection system

2019 ◽  
Vol 10 (10) ◽  
pp. 5117
Author(s):  
Adi Gross ◽  
Nadav H. Ivzan ◽  
Nairouz Farah ◽  
Yossi Mandel
Keyword(s):  
High Resolution ◽  
Projection System ◽  
Retinotopic Mapping

scholarly journals Evaluation and Optimization of Methods for Generating High-Resolution Retinotopic Maps Using Visual Cortex Voltage-Sensitive Dye Imaging

2021 ◽  
Vol 15 ◽  
Author(s):  
Ori Carmi ◽  
Adi Gross ◽  
Nadav Ivzan ◽  
Lamberto La Franca ◽  
Nairouz Farah ◽  
...  
Keyword(s):  
Visual Cortex ◽  
High Resolution ◽  
Voltage Sensitive Dye ◽  
Projection System ◽  
Retinal Stimulation ◽  
Retinotopic Maps ◽  
Analysis Methods ◽  
Silhouette Index ◽  
Cortical Responses ◽  
Voltage Sensitive Dye Imaging

The localization and measurement of neuronal activity magnitude at high spatial and temporal resolution are essential for mapping and better understanding neuronal systems and mechanisms. One such example is the generation of retinotopic maps, which correlates localized retinal stimulation with the corresponding specific visual cortex responses. Here we evaluated and compared seven different methods for extracting and localizing cortical responses from voltage-sensitive dye imaging recordings, elicited by visual stimuli projected directly on the rat retina by a customized projection system. The performance of these methods was evaluated both qualitatively and quantitatively by means of two cluster separation metrics, namely, the (adjusted) Silhouette Index (SI) and the (adjusted) Davies-Bouldin Index (DBI). These metrics were validated using simulated data, which showed that Temporally Structured Component Analysis (TSCA) outperformed all other analysis methods for localizing cortical responses and generating high-resolution retinotopic maps. The analysis methods, as well as the use of cluster separation metrics proposed here, can facilitate future research aiming to localize specific activity at high resolution in the visual cortex or other brain areas.

CREATION OF HIGH-RESOLUTION VIDEO PANORAMAS FOR SPORT EVENTS

2007 ◽  
Vol 01 (02) ◽  
pp. 171-184 ◽  
Author(s):  
C. FEHN ◽  
C. WEISSIG ◽  
I. FELDMANN ◽  
M. MÜLLER ◽  
P. EISERT ◽  
...  
Keyword(s):  
High Resolution ◽  
Large Scale ◽  
Digital Cameras ◽  
World Cup ◽  
Projection System ◽  
Playing Field ◽  
Left And Right ◽  
D 20 ◽  
Sport Events ◽  
Film Style

This paper describes an approach for creating high-resolution video panoramas of large-scale sport events. In an exemplary football scenario, we used two ARRIFLEX D-20 "film-style" digital cameras to capture both sides of the playing field as well as large parts of the stands. From the recorded left and right view images, we created a joint panoramic view with a resolution of 5016 × 1400 pel (5k) using sophisticated image processing algorithms. These highly immersive football panoramas were screened with our modular, high-resolution multi-projection system during the FIFA World Cup 2006 in a 600 seat CinemaxX movie theater in Berlin, providing the viewers with the feeling of actually watching the game from a good seat on the stands.

Manipulation of living cells by using PC-controlled micro-pattern projection system

2007 ◽  
Vol 22 (9-10) ◽  
pp. 2356-2359 ◽  
Author(s):  
Kimio Sumaru ◽  
Jun-ichi Edahiro ◽  
Yuki Ooshima ◽  
Toshiyuki Kanamori ◽  
Toshio Shinbo
Keyword(s):  
Living Cells ◽  
Projection System ◽  
Pattern Projection ◽  
Micro Pattern
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