scholarly journals Mantis shrimp–inspired organic photodetector for simultaneous hyperspectral and polarimetric imaging

2021 ◽  
Vol 7 (10) ◽  
pp. eabe3196
Author(s):  
Ali Altaqui ◽  
Pratik Sen ◽  
Harry Schrickx ◽  
Jeromy Rech ◽  
Jin-Woo Lee ◽  
...  
Keyword(s):  
Data Acquisition ◽  
Organic Semiconductors ◽  
Degrees Of Freedom ◽  
Temporal Data ◽  
Mantis Shrimp ◽  
Organic Photodetector ◽  
Polarimetric Imaging ◽  
Imaging Performance ◽  
Spectral Channels ◽  
Single Pixel

Combining hyperspectral and polarimetric imaging provides a powerful sensing modality with broad applications from astronomy to biology. Existing methods rely on temporal data acquisition or snapshot imaging of spatially separated detectors. These approaches incur fundamental artifacts that degrade imaging performance. To overcome these limitations, we present a stomatopod-inspired sensor capable of snapshot hyperspectral and polarization sensing in a single pixel. The design consists of stacking polarization-sensitive organic photovoltaics (P-OPVs) and polymer retarders. Multiple spectral and polarization channels are obtained by exploiting the P-OPVs’ anisotropic response and the retarders’ dispersion. We show that the design can sense 15 spectral channels over a 350-nanometer bandwidth. A detector is also experimentally demonstrated, which simultaneously registers four spectral channels and three polarization channels. The sensor showcases the myriad degrees of freedom offered by organic semiconductors that are not available in inorganics and heralds a fundamentally unexplored route for simultaneous spectral and polarimetric imaging.

Using computer clusters for processing spatial-temporal data streams in data acquisition systems

2018 ◽  
Vol 935 (5) ◽  
pp. 54-63
Author(s):  
A.A. Maiorov ◽  
A.V. Materuhin ◽  
I.N. Kondaurov
Keyword(s):  
Data Acquisition ◽  
Data Streams ◽  
Spatial Data ◽  
High Performance ◽  
Temporal Data ◽  
Cyberphysical Systems ◽  
Software Environment ◽  
Computer Clusters ◽  
Data Acquisition Systems ◽  
Essential Components

Geoinformation technologies are now becoming “end-to-end” technologies of the new digital economy. There is a need for solutions for efficient processing of spatial and spatio-temporal data that could be applied in various sectors of this new economy. Such solutions are necessary, for example, for cyberphysical systems. Essential components of cyberphysical systems are high-performance and easy-scalable data acquisition systems based on smart geosensor networks. This article discusses the problem of choosing a software environment for this kind of systems, provides a review and a comparative analysis of various open source software environments designed for large spatial data and spatial-temporal data streams processing in computer clusters. It is shown that the software framework STARK can be used to process spatial-temporal data streams in spatial-temporal data streams. An extension of the STARK class system based on the type system for spatial-temporal data streams developed by one of the authors of this article is proposed. The models and data representations obtained as a result of the proposed expansion can be used not only for processing spatial-temporal data streams in data acquisition systems based on smart geosensor networks, but also for processing spatial-temporal data streams in various purposes geoinformation systems that use processing data in computer clusters.

scholarly journals Procedures for Condition Mapping Using 360° Images

2020 ◽  
Vol 9 (1) ◽  
pp. 34
Author(s):  
Luigi Barazzetti ◽  
Mattia Previtali ◽  
Marco Scaioni
Keyword(s):  
Data Collection ◽  
Data Acquisition ◽  
Virtual Environment ◽  
Temporal Data ◽  
Novel Approach ◽  
Multi Temporal ◽  
Immersive Visualization ◽  
Over Time

The identification of deterioration mechanisms and their monitoring over time is an essential phase for conservation. This work aimed at developing a novel approach for deterioration mapping and monitoring based on 360° images, which allows for simple and rapid data collection. The opportunity to capture the whole scene around a 360° camera reduces the number of images needed in a condition mapping project, resulting in a powerful solution to document small and narrow spaces. The paper will describe the implemented workflow for deterioration mapping based on 360° images, which highlights pathologies on surfaces and quantitatively measures their extension. Such a result will be available as standard outputs as well as an innovative virtual environment for immersive visualization. The case of multi-temporal data acquisition will be considered and discussed as well. Multiple 360° images acquired at different epochs from slightly different points are co-registered to obtain pixel-to-pixel correspondence, providing a solution to quantify and track deterioration effects.

scholarly journals Complex gaze stabilization in mantis shrimp

2018 ◽  
Vol 285 (1878) ◽  
pp. 20180594 ◽  
Author(s):  
Ilse M. Daly ◽  
Martin J. How ◽  
Julian C. Partridge ◽  
Nicholas W. Roberts
Keyword(s):  
Visual System ◽  
Degrees Of Freedom ◽  
Wide Field ◽  
Gaze Stabilization ◽  
Mantis Shrimp ◽  
Rotational Degrees Of Freedom ◽  
Almost All ◽  
First Time ◽  
Torsional Rotation ◽  
Rotational Freedom

Almost all animals, regardless of the anatomy of the eyes, require some level of gaze stabilization in order to see the world clearly and without blur. For the mantis shrimp, achieving gaze stabilization is unusually challenging as their eyes have an unprecedented scope for movement in all three rotational degrees of freedom: yaw, pitch and torsion. We demonstrate that the species Odontodactylus scyllarus performs stereotypical gaze stabilization in the yaw degree of rotational freedom, which is accompanied by simultaneous changes in the pitch and torsion rotation of the eye. Surprisingly, yaw gaze stabilization performance is unaffected by both the torsional pose and the rate of torsional rotation of the eye. Further to this, we show, for the first time, a lack of a torsional gaze stabilization response in the stomatopod visual system. In the light of these findings, we suggest that the neural wide-field motion detection network in the stomatopod visual system may follow a radially symmetric organization to compensate for the potentially disorientating effects of torsional eye movements, a system likely to be unique to stomatopods.

Advanced Interactive Device in Virtual Knee Arthroscopic Surgery

2011 ◽  
Vol 189-193 ◽  
pp. 2148-2152 ◽  
Author(s):  
Yu Lei He ◽  
Jin Fang Li ◽  
Han Wu He
Keyword(s):  
Virtual Reality ◽  
Data Acquisition ◽  
Surgical Procedures ◽  
Degrees Of Freedom ◽  
Arthroscopic Surgery ◽  
Degree Of Freedom ◽  
Displacement Sensor ◽  
Creative Design ◽  
Realistic Simulation ◽  
Data Acquisition Card

Regarding the lack of interactivity for Virtual Knee Arthroscopic Surgery, which leads less immersion in simulated surgery, a new advanced interactive device in Virtual Knee Arthroscopic Surgery based on displacement sensor and Data acquisition card was developed. Based on study of degree of freedom on Knee Arthroscopic Surgery, a new interactive device on simulating real surgery was proposed. This device simplifies true operation for four degrees of freedom. Each displacement sensor captures information from one degree of freedom, then sends the information to the data acquisition card to carry out analysis and treatment for the purpose of synchronization on the computer, then realize realistic simulation of surgical procedures. The creative design of the interactive device makes it possible to flexibly adjust the location and angle of simulated scalpel and endoscope according to different operator and reach the requirement of immersion of virtual reality.

Optimal Data Acquisition Methods for Single-Pixel Imaging

2018 ◽  
Vol 39 (5) ◽  
pp. 492-498
Author(s):  
Mikhail D. Aksenov ◽  
Denis V. Sych
Keyword(s):  
Data Acquisition ◽  
Single Pixel

scholarly journals Step-by-step protocol for data acquisition and reconstruction of holographic images in high-throughput single-pixel holography

2021 ◽  
Author(s):  
DaiXuan Wu ◽  
Jiawei Luo ◽  
Guoqiang Huang ◽  
Yuanhua Feng ◽  
Xiaohua Feng ◽  
...  
Keyword(s):  
Data Acquisition ◽  
High Throughput ◽  
Biological Samples ◽  
Imaging Modality ◽  
Complex Valued ◽  
Single Pixel

Abstract With the strong desire to develop an efficacious imaging modality that can scrutinize complex-valued objects with intricate structures, such as a myriad of biological samples, we develop high-throughput single-pixel holography (SPH). The protocol aims to describe the detailed procedures of this work.

scholarly journals Single pixel polarimetric imaging through scattering media

2020 ◽  
Vol 45 (20) ◽  
pp. 5740
Author(s):  
Kai Ling C. Seow ◽  
Peter Török ◽  
Matthew R. Foreman
Keyword(s):  
Scattering Media ◽  
Polarimetric Imaging ◽  
Single Pixel

Photon‐counting CT via interleaved/gapped spectral channels: Feasibility and imaging performance

2021 ◽  
Author(s):  
Xiangyang Tang ◽  
Yan Ren ◽  
Huiqiao Xie
Keyword(s):  
Photon Counting ◽  
Imaging Performance ◽  
Spectral Channels
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