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SId Symposium, Seminar, and Exhibition 2017, display Week 2017

作者： Huang, Hekun Hua, Hong 3D Visualization and Imaging Systems Laboratory College of Optical Sciences The University of Arizona 1630 E University Blvd TucsonAZ85721 United States

ISBN: (纸本)9781510848757

A head-mounted light field display based on integral imaging is considered as one of the promising methods that can render correct or nearly correct focus cues and address the wellknown vergence-accommodation conflict problem in head mounted displays. despite its great potential, it still suffers some of the same limitations of conventional integral imaging based displays such as low spatial resolution and crosstalk. In this paper, we present a prototype design using tunable lens and aperture array to render 3d scenes over a large depth range while maintaining high image quality and minimizing crosstalk. Experimental results verify and show that the proposed design could significantly improve the viewing experience. © 2017 SId.

关键词： Crosstalk

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dual-layer High dynamic Range Head Mounted display

Dual-layer High Dynamic Range Head Mounted Display

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SId Symposium, Seminar, and Exhibition 2017, display Week 2017

作者： Xu, Miaomiao Hua, Hong 3D Visualization and Imaging Systems Laboratory College of Optical Sciences The University of Arizona 1630 E University Blvd TucsonAZ85721 United States

In this paper, a high dynamic range (HdR) head mounted display system using a dual-layer modulation configuration was proposed. By using two reflective spatial light modulators simultaneously, we demonstrated the abil... 详细信息

ISBN: (纸本)9781510848757

关键词： Modulation

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A digitally Switchable Multi-focal lens Using Freeform Optics for Wearable displays

A Digitally Switchable Multi-focal lens Using Freeform Optic...

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SId Symposium, Seminar, and Exhibition 2017, display Week 2017

作者： Wang, Xuan Qin, Yi Hua, Hong 3D Visualization and Imaging Systems Laboratory College of Optical Science The University of Arizona 1630 E University Blvd TucsonAZ85721 United States

ISBN: (纸本)9781510848757

We present the design of a new switchable multi-focal lens which consists of a freeform lens and a programmable spatial light modulator (SLM). By rapidly switching the input light path through different segments of the freeform lens with the programmable SLM, multiple foci are created in a timemultiplexed fashion. While the proposed multi-focal lens method can have a broad range of applications in imaging and display systems, we experimentally demonstrate a proof of concept prototype for an imaging system. © 2017 SId.

关键词： Wearable technology

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Recent Advances in Head-Mounted Light Field displays

Recent Advances in Head-Mounted Light Field Displays

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SId Symposium, Seminar, and Exhibition 2017, display Week 2017

作者： Hua, Hong 3D Visualization and Imaging Systems Laboratory College of Optical Sciences The University of Arizona 1630 E University Blvd TucsonAZ85721 United States

ISBN: (纸本)9781510848757

One of the many challenges in developing head-mounted displays (HMd) for is to create natural viewing experiences invulnerable to visual fatigue. Head-mounted light field displays render a true 3d scene by sampling either the projections of the 3d scene at different depths or the directions of the light rays apparently emitted by the 3d scene and viewed from different eye positions. They are potentially capable of rendering correct or nearly correct focus cues and addressing the very well-known vergence-accommodation mismatch problem in conventional virtual and augmented reality displays. © 2017 SId.

关键词： Augmented reality

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development of a light field laparoscope for depth reconstruction

Development of a light field laparoscope for depth reconstru...

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3d Image Acquisition and display: Technology, Perception and Applications, 3d 2017

作者： Kwan, Elliott Qin, Yi Hua, Hong 3D visualization and imaging system laboratory College of Optical Sciences University of Arizona 1630 E University Blvd. TucsonAZ85721 United States

Stereoscopy addresses depth perception loss in laparoscopy but encounters multiple design inefficiencies. A light field laparoscope is proposed to more effectively capture depth information. Experimental results demon... 详细信息

ISBN: (纸本)9781943580293

关键词： Laparoscopy

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10-3: design of a High-performance Optical See-through Light Field Head-mounted display

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SId Symposium digest of Technical Papers 2018年第1期49卷

作者： Hekun Huang Hong Hua 3D Visualization and Imaging Systems Laboratory College of Optical Sciences The University of Arizona 1630 E University Blvd. Tucson AZ 85721 USA

This paper presents our recent development of a high-performance integral-imaging-based optical see-through light field head-mounted display that offers a spatial resolution of 3 arc minutes over a depth range of 3 diopters and a wide see-through view of 65° by 40°. We further experimentally demonstrate the optical performances of the proposed InI-HMd design in terms of its spatial resolution, depth of field, and focus cue accuracy.

关键词： Head mounted light field display integral imaging optical system design

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Biomedical image analysis competitions: The state of current participation practice

arXiv

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arXiv 2022年

作者： Eisenmann, Matthias Reinke, Annika Weru, Vivienn Tizabi, Minu dietlinde Isensee, Fabian Adler, Tim J. Godau, Patrick Cheplygina, Veronika Kozubek, Michal Maier-Hein, Klaus Jäger, Paul F. Kopp-Schneider, Annette Maier-Hein, Lena Ali, Sharib Gupta, Anubha Kybic, Jan Noble, Alison de Solórzano, Carlos Ortiz Pachade, Samiksha Petitjean, Caroline Sage, daniel Wei, donglai Wilden, Elizabeth Alapatt, deepak Andrearczyk, Vincent Baid, Ujjwal Bakas, Spyridon Balu, Niranjan Bano, Sophia Bawa, Vivek Singh Bernal, Jorge Bodenstedt, Sebastian Casella, Alessandro Choi, Jinwook Commowick, Olivier daum, Marie depeursinge, Adrien dorent, Reuben Egger, Jan Eichhorn, Hannah Engelhardt, Sandy Ganz, Melanie Girard, Gabriel Hansen, Lasse Heinrich, Mattias Heller, Nicholas Hering, Alessa Huaulmé, Arnaud Kim, Hyunjeong Li, Hongwei Bran Landman, Bennett Li, Jianning Ma, Jun Martel, Anne Martín-Isla, Carlos Menze, Bjoern Nwoye, Chinedu Innocent Oreiller, Valentin Padoy, Nicolas Pati, Sarthak Payette, Kelly Sudre, Carole van Wijnen, Kimberlin Vardazaryan, Armine Vercauteren, Tom Wagner, Martin Wang, Chuanbo Yap, Moi Hoon Yu, Zeyun Yuan, Chun Zenk, Maximilian Zia, Aneeq Zimmerer, david Bao, Rina Choi, Chanyeol Cohen, Andrew dzyubachyk, Oleh Galdran, Adrian Gan, Tianyuan Guo, Tianqi Gupta, Pradyumna Haithami, Mahmood Ho, Edward Jang, Ikbeom Li, Zhili Luo, Zhengbo Lux, Filip Makrogiannis, Sokratis Müller, dominik Oh, Young-Tack Pang, Subeen Pape, Constantin Polat, Gorkem Reed, Charlotte Rosalie Ryu, Kanghyun Scherr, Tim Thambawita, Vajira Wang, Haoyu Wang, Xinliang Xu, Kele Yeh, Hung Yeo, doyeob Yuan, Yixuan Zeng, Yan Zhao, Xin Abbing, Julian Adam, Jannes Adluru, Nagesh Agethen, Niklas Ahmed, Salman Al Khalil, Yasmina Alenyà, Mireia Alhoniemi, Esa An, Chengyang Arega, Tewodros Weldebirhan Avisdris, Netanell Aydogan, dogu Baran Bai, Yingbin Calisto, Maria Baldeon Basaran, Berke doga Beetz, Marcel Bian, Hao Blansit, Kevin Bloch, Louise Bohnsack, Robert Bosticardo, Sara Breen, Jack Brudfors, Mikael Brüngel, Raphael Cabezas, Mariano Cacciola, Alb Heidelberg Division of Intelligent Medical Systems Germany Heidelberg HI Helmholtz Imaging Germany Faculty of Mathematics and Computer Science Heidelberg University Heidelberg Germany Heidelberg Division of Biostatistics Germany Heidelberg Division of Medical Image Computing Germany Heidelberg HI Applied Vision Lab Germany IT University of Copenhagen Copenhagen Denmark Centre for Biomedical Image Analysis Masaryk University Brno Czech Republic Heidelberg Interactive Machine Learning Group Germany Faculty of Mathematics and Computer Science and Medical Faculty Heidelberg University Heidelberg Germany NCT Heidelberg DKFZ University Hospital Heidelberg Germany School of Computing University of Leeds Leeds United Kingdom SBILab Department of ECE IIIT-Delhi India Faculty of Electrical Engineering Czech Technical University Prague Czech Republic Institute of Biomedical Engineering University of Oxford United Kingdom Center for Applied Medical Research Pamplona Spain Shri Guru Gobind Singhji Institute of Engineering and Technology Maharashtra Nanded India Université de Rouen Normandie France Lausanne Switzerland School of Engineering and Applied Science Harvard University United States ICube University of Strasbourg CNRS France Institute of Informatics School of Management HES-SO Valais-Wallis University of Applied Sciences and Arts Western Switzerland Techno-Pôle 3 Sierre3960 Switzerland Department of Nuclear Medicine and Molecular Imaging Lausanne University Hospital Rue du Bugnon 46 LausanneCH-1011 Switzerland University of Pennsylvania PhiladelphiaPA United States Department of Radiology University of Washington United States Wellcome EPSRC Centre for Interventional and Surgical Sciences University College London London United Kingdom Visual Artificial Intelligence Lab Oxford Brookes University Oxford United Kingdom Universitat Autònoma de Barcelona & Computer Vision Center Spain Dresden Fetscherstraße 74 PF 64 Dresden01307 Germany

The number of international benchmarking competitions is steadily increasing in various fields of machine learning (ML) research and practice. So far, however, little is known about the common practice as well as bottlenecks faced by the community in tackling the research questions posed. To shed light on the status quo of algorithm development in the specific field of biomedical imaging analysis, we designed an international survey that was issued to all participants of challenges conducted in conjunction with the IEEE ISBI 2021 and MICCAI 2021 conferences (80 competitions in total). The survey covered participants' expertise and working environments, their chosen strategies, as well as algorithm characteristics. A median of 72% challenge participants took part in the survey. According to our results, knowledge exchange was the primary incentive (70%) for participation, while the reception of prize money played only a minor role (16%). While a median of 80 working hours was spent on method development, a large portion of participants stated that they did not have enough time for method development (32%). 25% perceived the infrastructure to be a bottleneck. Overall, 94% of all solutions were deep learning-based. Of these, 84% were based on standard architectures. 43% of the respondents reported that the data samples (e.g., images) were too large to be processed at once. This was most commonly addressed by patch-based training (69%), downsampling (37%), and solving 3d analysis tasks as a series of 2d tasks. K-fold cross-validation on the training set was performed by only 37% of the participants and only 50% of the participants performed ensembling based on multiple identical models (61%) or heterogeneous models (39%). 48% of the respondents applied postprocessing steps. © 2022, CC BY.

关键词： Benchmarking

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A laser beam shaper for homogeneous rectangular illumination based on freeform micro lens array

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Optoelectronics Letters 2016年第4期12卷 253-256页

作者：陈恩果黄佳敏郭太良吴仍茂 National and Local United Engineering Laboratory of Flat Panel Display Technology Fuzhou University Postdoctoral Research Station of Electronic Science and Technology Fuzhou University 3D Visualization and Imaging System Lab College of Optical Sciences University of Arizona

An effective design method of freeform micro lens array is presented for shaping varied laser beams into prescribed rectangular illumination. The variable separation mapping is applied to design concave freeform surfaces for constructing a freeform lens array. Several dedicated examples show that the designed freeform optical lens array can achieve a prescribed rectangular illumination pattern, especially without considering the initial states of incident laser beams. Both high collection efficiency and good spatial uniformity can be available simultaneously. Tolerance analysis is also performed to demonstrate that this optical device can well avoid fabricating difficulty in actual applications.

关键词： Fits and tolerances Lenses Microlenses

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P-220L:Late-News Poster: demonstration of an Occlusion-Capable Optical See-Through Head-Mounted display

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SId Symposium digest of Technical Papers 2017年第1期48卷

作者： Austin Wilson Hong Hua 3D Visualization and Imaging Systems Laboratory College of Optical Sciences University of Arizona 1630 East University Boulevard Tucson 85721 Arizona USA

Most of the state-of-the-art optical see-though head-mounted displays lack the ability to occlude the real scene and fail to render the virtual scene in high contrast with bright surroundings. Mutual occlusion is a strong contributor to the human visual system's ability to distinguish depth information and create a seamless integration of the real and virtual world. In this paper, we present a monocular prototype of an occlusion-capable optical see-through head mounted display and demonstrate its mutual occlusion capability and performance in bright environments. Our design currently uses an Organic LEd (OLEd) microdisplay coupled with a Liquid crystal on silicon (LCoS) type Spatial Light Modulator (SLM) to achieve a 30 degree diagonal FOV and 1920x1080 color resolution.

关键词： Occlusion capable head mounted display spatial light modulator augmented reality

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P-219L:Late-News Poster: A digitally Switchable Multi-focal lens Using Freeform Optics for Wearable displays

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SId Symposium digest of Technical Papers 2017年第1期48卷

作者： Xuan Wang Yi Qin Hong Hua 3D Visualization and Imaging Systems Laboratory College of Optical Science The University of Arizona 1630 E University Blvd. Tucson AZ 85721 USA

We present the design of a new switchable multi-focal lens which consists of a freeform lens and a programmable spatial light modulator (SLM). By rapidly switching the input light path through different segments of the freeform lens with the programmable SLM, multiple foci are created in a time-multiplexed fashion. While the proposed multi-focal lens method can have a broad range of applications in imaging and display systems, we experimentally demonstrate a proof of concept prototype for an imaging system.

关键词： switchable lens freeform optics multi-focal plane multi-focal lens

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