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Neural Implicit Surface Reconstruction using Imaging Sonar [article]

Mohamad Qadri, Michael Kaess, Ioannis Gkioulekas
2022 arXiv   pre-print
We present a technique for dense 3D reconstruction of objects using an imaging sonar, also known as forward-looking sonar (FLS).  ...  Additionally, given such a representation, we use a differentiable volumetric renderer that models the propagation of acoustic waves to synthesize imaging sonar measurements.  ...  To the best of our knowledge, this work is the first to introduce a physics-based volumetric renderer suitable for dense 3D acoustic reconstruction using wide-aperture imaging sonars.  ... 
arXiv:2209.08221v1 fatcat:bfxotvgeovctpjsoxz7u7cqacq

Ultra-fast Lensless Computational Imaging through 5D Frequency Analysis of Time-resolved Light Transport

Di Wu, Gordon Wetzstein, Christopher Barsi, Thomas Willwacher, Qionghai Dai, Ramesh Raskar
2013 International Journal of Computer Vision  
framework that will also be useful for future ultra-fast computational imaging systems.  ...  Using this analysis, we derive analytic expressions for information transfer between these dimensions and show how this transfer can be exploited for designing a new lensless imaging system.  ...  Reflection seismology and medical ultrasound use such measurements for performing non-invasive volumetric imaging, whereas sonar, radar, and LiDAR technologies determine an object's range, among other  ... 
doi:10.1007/s11263-013-0686-0 fatcat:j5hegkcj35gyjoyhpdjjzypexq

Video-based 3D reconstruction, laparoscope localization and deformation recovery for abdominal minimally invasive surgery: a survey

Bingxiong Lin, Yu Sun, Xiaoning Qian, Dmitry Goldgof, Richard Gitlin, Yuncheng You
2015 International Journal of Medical Robotics and Computer Assisted Surgery  
Methods This article provides a literature review on laparoscopic videobased intra-operative techniques of 3D surface reconstruction, laparoscope localization and tissue deformation recovery for abdominal  ...  First, as fundamental tasks in 3D reconstruction and laparoscope localization, feature detection and feature tracking methods are discussed.  ...  Based on PTAM and the work of Graber et al. (124), Wendel et al. (125) developed a live dense volumetric reconstruction for micro-aerial vehicles.  ... 
doi:10.1002/rcs.1661 pmid:25931190 fatcat:mlbmwiklmrcmjojendit3ve3qu

Neural Fields in Visual Computing and Beyond [article]

Yiheng Xie, Towaki Takikawa, Shunsuke Saito, Or Litany, Shiqin Yan, Numair Khan, Federico Tombari, James Tompkin, Vincent Sitzmann, Srinath Sridhar
2022 arXiv   pre-print
These methods, which we call neural fields, have seen successful application in the synthesis of 3D shapes and image, animation of human bodies, 3D reconstruction, and pose estimation.  ...  However, due to rapid progress in a short time, many papers exist but a comprehensive review and formulation of the problem has not yet emerged.  ...  We thank Sunny Li for their help in designing the website, Jayden Yi for a conceptual readthrough, and Alexander Rush and Hendrik Strobelt for the Mini-Conf project.  ... 
arXiv:2111.11426v4 fatcat:yteqzbu6gvgdzobnfzuqohix2e

Visualization of Multi-Variate Scientific Data

R. Fuchs, H. Hauser
2009 Computer graphics forum (Print)  
We also provide a categorization of these techniques with the aim for a better overview of related approaches.  ...  In the second part of this paper we take a look at recent techniques that are useful for the visualization of complex data sets either because they are general purpose or because they can be adapted to  ...  Gröller for his input and support of this work. We thank the reviewers for their helpful comments.  ... 
doi:10.1111/j.1467-8659.2009.01429.x fatcat:kywbqg572bgnfomvu4ht5u3fem

Mapping coral reef environments

Sarah M. Hamylton
2017 Progress in physical geography  
images.  ...  images.  ...  framework for mapping, monitoring and modelling in coral reef environments.  ... 
doi:10.1177/0309133317744998 fatcat:uzvrxkca7fbzpnbnftwugn6hxm

Modeling Sea Ice

Kenneth M. Golden, Luke G. Bennetts, Elena Cherkaev, Ian Eisenman, Daniel Feltham, Christopher Horvat, Elizabeth Hunke, Christopher Jones, Donald K. Perovich, Pedro Ponte-Castaneda, Courtenay Strong, Deborah Sulsky (+1 others)
2020 Notices of the American Mathematical Society  
Finally, we also thank the reviewers for very helpful comments.  ...  CS would like to thank ONR and NASA for research support under grants N00014-18-1-2552, N00014-13-10291, and 80NSSC18K0843.  ...  [S59,S7], and solve the 3D multiple scattering problem for a full sea of floes.  ... 
doi:10.1090/noti2171 fatcat:dtlfdkvi4zdybmcpxqnuych7va

Assessment of Evapotranspiration and Soil Moisture Content Across Different Scales of Observation

Willem Verstraeten, Frank Veroustraete, Jan Feyen
2008 Sensors  
Acknowledgements The authors wish to thank the Flemish Institute for Technological Research (VITO) for the scholarship and financial support for this study, as well as the support offered by the GLOVEG  ...  The 3 rd layer is a meteorological time series and the final 4 th layer contains plant developmental data (LAI, height). For each image pixel a single set of parameters is implemented.  ...  In that case, soil physical properties are required to be input in 3D mode. 3D models must also be able to account for unforeseen water fluxes.  ... 
doi:10.3390/s8010070 pmid:27879697 pmcid:PMC3681150 fatcat:dm5frbi5ynfyrdcciegbueyqxa

Recent Trends in Underwater Visible Light Communication (UVLC) Systems

Mohammad Furqan Ali, Dushantha Nalin K. Jayakody, Yonghui Li
2022 IEEE Access  
In recent years, underwater visible light communication (UVLC) has become a potential wireless candidate for signal transmission in highly critical, unknown, and acrimonious water mediums such as oceans  ...  Therefore, UVLC has drawn attention as a reliable digital carrier and claims a futuristic optical media in the wireless communication domain.  ...  In more contrast, the SLAM imaging AUV-based technology that supports constructing a 3D image in different color frames is widely discussed in [276] .  ... 
doi:10.1109/access.2022.3150093 fatcat:o4ytx473bfcopmidat5lypkjri

Role of sea ice in global biogeochemical cycles: emerging views and challenges

Martin Vancoppenolle, Klaus M. Meiners, Christine Michel, Laurent Bopp, Frédéric Brabant, Gauthier Carnat, Bruno Delille, Delphine Lannuzel, Gurvan Madec, Sébastien Moreau, Jean-Louis Tison, Pier van der Merwe
2013 Quaternary Science Reviews  
Finally, the sea ice zone supports significant oceaneatmosphere methane (CH 4 ) fluxes, while saline ice surfaces activate springtime atmospheric bromine chemistry, setting ground for tropospheric ozone  ...  Palaeoclimatic proxies are also relevant, in particular the sea ice proxies, inferring past sea ice conditions from glacial and marine sediment core records and providing analogues for future changes.  ...  ., 2012) , and characterized by much lower albedo than bare ice .  ... 
doi:10.1016/j.quascirev.2013.04.011 fatcat:ql2w7rnk55eivpr4zokmqpr47q

Conference Digest

2020 2020 IEEE Aerospace Conference  
The Auxiliary Payload Sensor Suite (APSS), a collection of environmental sensors carried by the Interior exploration using Seismic Investigations, Geodesy, and Heat Transport (InSight) lander, is capable  ...  The operator monitors the 3D volumetric map, communication graph, and location/health of all agents in the graphical user interface.  ...  In this paper we describe how LUCID makes use of CUDA and GPU hardware to produce image reconstructions.  ... 
doi:10.1109/aero47225.2020.9172613 fatcat:ioqf5ijrx5gvffu3ls34aa2nsq

A local stero matching algorithm for dense 3D scene reconstruction [article]

Christos Stentoumis, National Technological University Of Athens
More specifically, a priori information for a depicted scene can be used to reconstruct its 3D model. Liebowitz et al. (1999) exploit parallel and orthogonal lines for reconstructing a scene.  ...  The information extracted from the image and exploited for this reconstruction are the vanishing points and lines. A  ...  Martin and Aggarwal (1983) presented a pioneering work on volume segments volumetric representation for 3D reconstruction from images; in this approach the silhouettes of an object were used to reconstruct  ... 
doi:10.26240/heal.ntua.23065 fatcat:4v33eamz4nf2bdpgxhz66totm4

EUCOP4 Book of Abstracts [article]

Gonçalo Vieira, Pedro Pina, Carla Mora, António Correia
2014 Zenodo  
A very positive response to the Call for Papers for EUCOP4 was obtained, with more than four hundred and fifty submissions.  ...  Fribourg (Switzerland), for their plenary lectures.  ...  For each stratigraphic layer volumetric fractions of the soil constituents such as mineral, organic, water/ice, and air content are assigned.  ... 
doi:10.5281/zenodo.5532540 fatcat:ucwuntienvh7bogt77s52im7mq

Dense monocular perception for mobile robotics

Jacek Zienkiewicz, Andrew Davison, Stefan Leutenegger, Dyson Foundation
This enables us to directly use information collected from all pixels in an image and create dense reconstructions of environments.  ...  We believe that this work offers a promising route to a truly usable real-time monocular dense SLAM system for mobile robots.  ...  Multi-scale 3D Reconstruction Explicitly handling scenes with multiple scales within a 3D reconstruction framework is a challenging problem, but it is necessary for obtaining state-of-the-art results,  ... 
doi:10.25560/58855 fatcat:7jnanhxdgnafhj3rq7br3c4veq


A digital 3D model can be obtained by means of physical object measurements performed by using a 3D scanner.  ...  The aim of the thesis is to introduce innovative approaches to the regression problem suited for achieving high reconstruction accuracy, while limiting the computational complexity, and appropriate for  ...  Acknowledgements It is a pleasure to thank the people who made this thesis possible.  ... 
doi:10.13130/bellocchio-francesco_phd2011-03-25 fatcat:n5ooikjrprbepngtwl5bg2rzli
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