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LIME: Live Intrinsic Material Estimation 31

LIME: Live Intrinsic Material Estimation

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31st IEEE/CVF conference on computer Vision and Pattern Recognition (CVPR)

作者： Meka, Abhimitra Maximov, Maxim Zollhofer, Michael Chatterjee, Avishek Seidel, Hans-Peter Richardt, Christian Theobalt, Christian MPI Informat Saarbrucken Germany Saarland Informat Campus Saarbrucken Germany Stanford Univ Stanford CA 94305 USA Univ Bath Bath Avon England

ISBN: (纸本)9781538664209

We present the first end-to-end approach for real-time material estimation for general object shapes with uniform material that only requires a single color image as input. In addition to Lambertian surface properties, our approach fully automatically computes the specular albedo, material shininess, and a foreground segmentation. We tackle this challenging and ill-posed inverse rendering problem using recent advances in image-to-image translation techniques based on deep convolutional encoder-decoder architectures. The underlying core representations of our approach are specular shading, diffuse shading and mirror images, which allow to learn the effective and accurate separation of diffuse and specular albedo. In addition, we propose a novel highly efficient perceptual rendering loss that mimics real-world image formation and obtains intermediate results even during run time. The estimation of material parameters at real-time frame rates enables exciting mixed-reality applications, such as seamless illumination-consistent integration of virtual objects into real-world scenes, and virtual material cloning. We demonstrate our approach in a live setup, compare it to the state of the art, and demonstrate its effectiveness through quantitative and qualitative evaluation.

关键词： Lighting Estimation Rendering (computer graphics) Real-time systems Geometry Mathematical model Image segmentation

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InverseFaceNet: Deep Monocular Inverse Face Rendering 31

InverseFaceNet: Deep Monocular Inverse Face Rendering

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31st IEEE/CVF conference on computer Vision and Pattern Recognition (CVPR)

作者： Kim, Hyeongwoo Zollhoefer, Michael Tewari, Ayush Thies, Justus Richardt, Christian Theobalt, Christian Max Planck Inst Informat Saarbrucken Germany Saarland Informat Campus Saarbrucken Germany Stanford Univ Stanford CA 94305 USA Tech Univ Munich Munich Germany Univ Bath Bath Avon England

ISBN: (纸本)9781538664209

We introduce InverseFaceNet, a deep convolutional inverse rendering framework for faces that jointly estimates facial pose, shape, expression, reflectance and illumination from a single input image. By estimating all parameters from just a single image, advanced editing possibilities on a single face image, such as appearance editing and relighting, become feasible in real time. Most previous learning-based face reconstruction approaches do not jointly recover all dimensions, or are severely limited in terms of visual quality. In contrast, we propose to recover high-quality facial pose, shape, expression, reflectance and illumination using a deep neural network that is trained using a large, synthetically created training corpus. Our approach builds on a novel loss function that measures model-space similarity directly in parameter space and significantly improves reconstruction accuracy. We further propose a self-supervised boot-strapping process in the network training loop, which iteratively updates the synthetic training corpus to better reflect the distribution of real-world imagery. We demonstrate that this strategy outperforms completely synthetically trained networks. Finally, we show high-quality reconstructions and compare our approach to several state-of-the-art approaches.

关键词： Face Geometry Lighting Rendering (computer graphics) Image reconstruction Training Shape

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Does learning style play a role in computer information systems course performance? 31

Does learning style play a role in computer information syst...

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31st Information Systems Educators conference, ISECON 2014 and 7th conference on Information Systems Applied Research, CONISAR 2014

作者： Kruck, S.E. Scott Hunsinger, D. Peslak, Alan Ceccucci, Wendy Sendall, Patricia Computer Information Systems James Madison University HarrisonburgVA22807 United States Computer Information Systems Appalachian State University BooneNC28607 United States Information Sciences and Technology Penn State University DunmorePA18512 United States Quinnipiac University Computer Information Systems HamdenCT06518 United States Girard School of Business Merrimack College N. AndoverMA01845 United States

This study represents an analysis of student performance in computer information systems (CIS) courses using the Felder-Silverman Index of Learning styles (ILS) to examine academic success in CIS courses. For this study, academic success is measured by grades achieved. The ILS measurement scale was self-administered by students enrolled in CIS courses from fall 2008 through spring 2013. Our study found a significant difference between students’ grades and learning styles. We also found a significant relationship between students’ grades and the Active vs-Reflective index score. ©2014 EDSIG (Education Special Interest Group of the AITP), *** and FITE (Foundation for Information Technology Education), ***/.

关键词： students

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32 b 3-D graphic processor chip with 10 M pixel/s Gouraud shading.

32 b 3-D graphic processor chip with 10 M pixel/s Gouraud sh...

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1988 IEEE International Solid-state Circuits conference - Digest of Technical Papers (31st ISSCC).

作者： Ohhashi, Masahide Ikumi, Nobuyuki Itoh, Satoshi Suda, Kazuhiro Bandai, Yoshiaki Toshiba Semiconductor Device Engineering Lab Kawasaki Jpn

A 32-b three-dimensional (3-D) graphic processor, capable of drawing and rendering realistic 3-D images at the rate of 10M Gouraud-shaded pixel/s with a hidden-surface removal based on Z buffer algorithm, is described. Shading algorithm implementation, pipelined architecture for preprocessing and pixel drawing, and control of dual-port DRAM function have been accomplished on the chip. Multi-chip architecture (up to four chips) for smooth shading enables 40M Gourad-shaded pixel/s performance. The functions of this chip are summarized. Besides Gouraud and constant shading, a variety of 2-D, 3-D, and bit-map graphics functions such as high-speed line drawing, depth cueing, image data bidirectional transfer between the host system, and the bit-map memory, etc. are realized on the LSI.

关键词： computer graphics

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Teaching introductory graphics with web assistance

Teaching introductory graphics with web assistance

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Frontiers in Education (FIE) conference

作者： J.A. Vila J.D. Hartman Appliead Computer Science Department 5150 Illinois State University Normal IL USA

The introduction of high speed computers with excellent graphic rendering capabilities and software that takes advantage of those capabilities have precipitated a change in the philosophy of teaching introductory courses in graphics. studies of introductory computer graphics courses have indicated that algorithms, such as line and circle drawing and polygon fills, and the study of data structures to support graphics are common topics taught in introductory courses. A cursory review of available software tools for teaching computer graphics topics indicates that there is a lack of web-based visualizations of commonly taught computer graphics algorithms. The purpose of this paper is to describe a web-based tutorial that has been used to supplement an introductory computer graphics course.

关键词： Education computer graphics Data visualization Animation Data structures Rendering (computer graphics) Application software Concrete Building materials Sorting

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Automatic detection of certain unwanted driver behavior 31

Automatic detection of certain unwanted driver behavior

引用

31st International conference on computer graphics and Vision, GraphiCon 2021

作者： Faizov, Boris Shakhuro, Vlad Konushin, Anton Lomonosov Moscow State University Leninskiye Gory 1 Moscow119991 Russia NRU Higher School of Economics Pokrovsky Bulvar 11 Moscow109028 Russia

This work is devoted to the automatic detection of unwanted driver behavior such as smoking, using a mobile phone, and eating. The various existing datasets are practically unsuitable for this task. We did not find suitable training data with RGB video sequences shot from the position of the inner mirror. So we investigated the possibility of training the algorithms for this task on an out-of-domain set of people faces images. We also filmed our own test video sequence in a car to test the algorithms. We investigated different existing algorithms working both with one frame and with video sequences and conducted an experimental comparison of them. The availability of temporal information improved quality. Another important aspect is metrics for assessing the quality of the resulting system. We showed that experimental evaluation in this task should be performed on the entire video sequences. We proposed an algorithm for detecting undesirable driver actions and showed its effectiveness. © 2021 Copyright for this paper by its authors.

关键词： computer vision

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Implementation of interactive poster "suiPo"

Implementation of interactive poster "suiPo"

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25th SIGCHI conference on Human Factors in Computing Systems 2007, CHI 2007

作者： Tsunoda, Fuminori Matsumoto, Takayuki Nakagawa, Takeshi Utsunomiya, Mariko East Japan Railway 2-0 Nisshin cho Saitama-shi Saitama 331-8513 Japan

ISBN: (纸本)1595936424

This paper explains an implementation of new media "SuiPo," or Suica Poster, which uses a combination of IC card ticket "Suica" and Internet accessible mobile phone. Customers can get e-mail information by touching their IC card ticket on the reader located near the poster. Two pilot tests are conducted before the service has begun. The first test revealed that many people preferred the interactive poster but the registration process was complicated. The second test was conducted after improving the registration process. The lessons learned through two pilot tests are that in addition to the easier registration process, the increased popularity of two dimensional barcode reader in mobile phone has lowered the barrier of registration process. The SuiPo has been introduced in July 31st, 2006 and started service at Shinjuku station and Tokyo station. We hope the implementation would change customers' perception of Suica not only as a ticket or e-money but also as an information tool.

关键词： Interactive computer graphics

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Dynamic Difficulty Adjustment in a Whac-A-Mole like Game 17

Dynamic Difficulty Adjustment in a Whac-A-Mole like Game

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Joint conference on 17th Brazilian Symposium on computer Games and Digital Entertainment (SBGames) / 31st conference on graphics, Patterns and Images (SIBGRAPI) / 20th Symposium on Virtual and Augmented Reality (SVR)

作者： Garcia, Bruno E. R. Crocomo, Marcio K. Andrade, Kleber O. IFSP PRC Dept Informat Piracicaba SP Brazil FATEC AM Dept Informat Americana SP Brazil

ISBN: (纸本)9781538677698

Based on the Evolutionary Algorithm (EA) proposed by [1], this paper presents a new EA version with dynamic difficulty adjustment for a Whac-a-Mole like game used in motor rehabilitation of hand. This new version considers user performance as input and generates the position and time that the target will stay on screen. In order to simulate different users needs, a variety of player profiles were created with diverse horizontal movement speed (ulnar deviation/radial deviation of the hand) and vertical movement speed (supination/pronation of hand), as well as distinctive player attention deficits (response time to the apparition of the targets). The results show that the developed EA can adjust the difficulty factors of the game according to the skill set of each profile.

关键词： Human-computer Interactive Serious Games for Rehabilitation Artificial Intelligence Evolutionary Algorithm Dynamic Difficulty Adjustment.

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Intersection Between Surfaces Using computer Extended Descriptive Geometry (CeDG): Application to the Focal Illumination of a Sphere 31st

Intersection Between Surfaces Using Computer Extended Descri...

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31st International conference on The Digital Transformation in the Graphic Engineering, INGEGRAF 2022

作者： Prado-Velasco, Manuel García-Ruesgas, Laura Graphics Engineering Department University of Seville Seville Spain

ISBN: (纸本)9783031203244

computer Extended Descriptive Geometry (CeDG) is a new approach to computer modelling of 3D geometric systems that tries to overcome several limitations of current CAD systems. A preliminary version of CeDG for GeoGebra has demonstrated advantages in sheet metal and mechanisms field. This paper develops the theoretical basis of the Locus-based Surfaces’ Intersection Method (LSIM) of CeDG and compares it against the standard Descriptive Geometry technique, through the calculation of the illumination of a sphere by a focal light beam. Results showed that, in opposition to standard Descriptive Geometry technique, the LSIM CeDG model combines less complexity (geometric procedure requires only one iteration) with the capability to be extended to other parameters’ values and projections, keeping the compliance with geometrical requirements. Accuracy metrics have demonstrated that LSIM can generate the exact (true) surface intersection curve through its projections, thanks to the geometric integrity of the underlying dynamic geometry software (GeoGebra). © 2023, The Author(s), under exclusive license to springer Nature Switzerland AG.

关键词： Application programs

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Are Explainability Tools Gender Biased? A Case study on Face Presentation Attack Detection 31

Are Explainability Tools Gender Biased? A Case Study on Face...

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31st European Signal Processing conference, EUSIPCO 2023

作者： Huber, Marco Fang, Meiling Boutros, Fadi Damer, Naser Fraunhofer Institute for Computer Graphics Research IGD Darmstadt Germany Department of Computer Science TU Darmstadt Darmstadt Germany

ISBN: (纸本)9789464593600

Face recognition (FR) systems continue to spread in our daily lives with an increasing demand for higher explainability and interpretability of FR systems that are mainly based on deep learning. While bias across demographic groups in FR systems has already been studied, the bias of explainability tools has not yet been investigated. As such tools aim at steering further development and enabling a better understanding of computer vision problems, the possible existence of bias in their outcome can lead to a chain of biased decisions. In this paper, we explore the existence of bias in the outcome of explainability tools by investigating the use case of face presentation attack detection. By utilizing two different explainability tools on models with different levels of bias, we investigate the bias in the outcome of such tools. Our study shows that these tools show clear signs of gender bias in the quality of their explanations. © 2023 European Signal Processing conference, EUSIPCO. All rights reserved.

关键词： Face recognition

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