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检索条件"任意字段=International Conference on Computer Graphics, Imaging and Visualization"

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Rendering cloudy skies by a volume texture

Rendering cloudy skies by a volume texture

引用

conference on imaging Sciences and Display Technologies

作者： Fan, C Nagahashi, H Tokyo Institute of Technology (Japan)

ISBN: (纸本)018942353X

In order to render clouds and represent the distribution of the Light under a cloudy sky a new rendering method for cloudy skies is introduced. In our new method, clouds are represented by a layer called C layer. Three attributes named transparence, reflection and shadow parameter, are additionally defined at each point of the C layer, and these attributes are used to simulate the translucence and the shading effects of clouds. The atmospheric aerosol such as haze or fog is assumed to have a uniform density under the C layer, and introduce an efficient approach to calculate the scattering coefficient by the haze at different densities according to the vision range.

关键词： computer graphics cloud lighting model volume texture

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Planar Projection of Polytopes using Hough Transforms

Planar Projection of Polytopes using Hough Transforms

引用

2018 IEEE international conference on Electronics, Computing and Communication Technologies, CONECCT 2018

作者： Gurung, Amit Ray, And Rajarshi National Institute of Technology Meghalaya India

ISBN: (纸本)9781538611128

visualization of the state-space computed by statespace exploration tools for continuous and hybrid systems, is necessary for a better comprehension of the system dynamics. Tools like SpaceEx and XSpeed compute the state-space as a collection of polytopes. The visualization of the statespace, therefore requires an efficient algorithm for (1) Planar projection of high-dimensional polytopes and (2) Enumerating the vertices of the projection for plotting. In this paper, we propose a novel algorithm to compute a planar projection of a H-represented polytope. The proposed algorithm computes the projected polytope in V-representation and therefore can be readily visualized with plotting utilities. It is based on the support function representation of a polytope and Hough transforms. We believe that this work gives a new perspective of looking at the computation of planar projections, using classical results on Hough transforms in the domain of computer graphics. The limitation of the algorithm is that it incurs an approximation error, although the error can be measured and bounded. We show empirically that the performance of our algorithm is significantly better in comparison to known efficient algorithms of projection and enumeration, and therefore is viable when a limited approximation error is permissible. © 2018 IEEE.

关键词： visualization

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TasKar: A Research and Education Tool for Calculation and Representation of Binary Classification Performance Instruments 14

TasKar: A Research and Education Tool for Calculation and Re...

引用

14th international conference on Information Security and Cryptology, ISCTURKEY 2021

作者： Canbek, Gurol Temizel, Tugba Taskaya Sagiroglu, Seref Pointr/Middle East Technical University Ankara Turkey Middle East Technical University Informatics Institute Ankara Turkey Gazi University Computer Engineering Department Ankara Turkey

ISBN: (纸本)9781665407762

This study covers almost the ultimate set of binary-classification performance instruments derived from four dimensions of a confusion matrix, namely true positives/negatives and false positives/negatives and enhances their representation by establishing a meaningful interpretation of the dimensions. A common textual formatting scheme is provided to improve the readability and comprehensibility of performance instruments' representation. A compact dashboard (named 'TasKar', the abbreviation of 'Tasnif Karnesi', 'Classification Report' in Turkish) is developed and provided online to calculate and visualize a total of 52 performance instruments (27 measures, 23 metrics, and 2 indicators) by entering confusion matrix elements only. Taking parametric, variant, and recently proposed instruments the number covered becomes 65. Despite the limited approaches in confusion matrix visualization in the literature, three new graphics were devised to visualize true/false positive/negative rates (TPR, FPR, TNR, FNR), positive/negative predictive values (PPV, NPV), and false discovery/omission rates (FDR, FOR) performance metrics. It is expected that the proposed method and tool will be used by researchers in computation, interpretation, and standardized representation of classification performance as well as by teachers and students in machine learning education. © 2021 IEEE.

关键词： visualization

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On the double interpretation of the description of the "Consistency and standards" heuristic in the heuristic evaluation method 16

On the double interpretation of the description of the "Cons...

引用

16th international Joint conference on computer Vision, imaging and computer graphics Theory and Applications, VISIGRAPP 2021

作者： Thomé, Bruno De Souza Timóteo, Lucas Da Silva, Wagner Ferreira Da Silva, Celmar Guimarães School of Technology University of Campinas Limeira Brazil

ISBN: (纸本)9789897584886

Heuristic Evaluation (HE) is a well-known method for assessing usability in Human-computer Interaction. Among Nielsen’s usability heuristics for HE,"Consistency and standards" heuristic (H4) is related to consistency, a relevant concept for usability. However, the description of this heuristic does not deal with some relevant aspects of the concept of consistency. Therefore, the literal interpretation of this description can force some evaluators to search for another heuristic to associate with some inconsistency problems – a search that may or may not be successful. This paper is part of a research that questions if the description of this heuristic must be improved. In particular, this paper aims to understand how evaluators may behave when they do this literal interpretation during the execution of a HE. Our first step towards these goals was to analyze Nielsen’s heuristics in order to search if other heuristics than H4 also have consistency aspects. We also hypothesized how some evaluators may associate these heuristics with specific inconsistency problems. We noted that at least 5 heuristics (in addition to H4) have some aspect of consistency. Besides, we observed that it is possible to construct a logical reasoning that may associate inconsistency problems to one of these heuristics. We suggest that it is worth doing a discussion about extending the current description of the consistency heuristic to include more aspects of consistency, instead of allowing this literal interpretation to deviate evaluators from the expected interpretation of H4 heuristic. Copyright © 2021 by SCITEPRESS – Science and Technology Publications, Lda. All rights reserved.

关键词： Human computer interaction

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Using Perspective in 3D File Management: Rotating Windows and Billboarded Icons

Using Perspective in 3D File Management: Rotating Windows an...

引用

international conference on computer graphics, imaging and visualization, CGIV

作者： J.R. Maltby School of Commerce and Management Southern Cross University Australia

The evaluation and comparison of 2D and 3D workspace environments is a hot topic. Much has been said concerning the promise of 3D workspaces but much less has been realised. Part of the problem appears to be the difficulty of developing 3D GUIs with high usabilities and effective navigation mechanisms. Many early environments simulated a 3D office but all suffered from a range of problems, from poor navigation to issues of spatial cognition. Indeed, most researchers now consider an office to be an inappropriate metaphor for an effective 3D computer environment. This paper describes the development of a 3D workspace based directly on the WIMP metaphor as opposed to a desktop or office metaphor. The environment uses rotating transparent 2D windows in a 3D world and presents icons as billboards

关键词： Operating systems Graphical user interfaces Navigation Cognition Glass Productivity Application software Utility programs Two dimensional displays computer displays

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Research on Polarization imaging Target Detection Method Based on Multi-View 3

Research on Polarization Imaging Target Detection Method Bas...

引用

3rd international conference on computer graphics, Image, and Virtualization, ICCGIV 2023

作者： Cui, Hao Wang, Xin Pu, Xiankun Shi, Lei Zhou, Zhiqiang Gao, Jun School of Computer and Information Hefei University of Technology Hefei230009 China Intelligent Interconnected Systems Laboratory of Anhui Province Hefei230009 China

ISBN: (纸本)9781510671720

Traditional multi-view target detection can only obtain the light intensity information of the target, and its detection ability is very limited in complex environments;Traditional polarization target detection mainly relies on a single camera to obtain the polarization information of the target, making it difficult to directly obtain all the polarization information of the target in some complex backgrounds. In order to overcome the limitations of the two detection methods mentioned above, this paper studies a multi angle polarization target detection method based on a polarization array system. This method mainly uses traditional multi perspective image processing algorithms to process polarized images and achieve polarization image stitching. To address the issue of the inability to directly concatenate polarized images in low light environments, this paper proposes the introduction of image enhancement algorithms to achieve the concatenation and target detection of multi angle polarized images in low light environments. Based on the characteristics of polarization feature images, a fusion method based on polarization features was studied to improve the contrast between the target and the background. © 2023 SPIE.

关键词： Image enhancement

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The 3D Reconstruction of Greenhouse Tomato Plant Based on Real Organ Samples and Parametric L-system

The 3D Reconstruction of Greenhouse Tomato Plant Based on Re...

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6th international conference on Digital Image Processing (ICDIP)

作者： Xin, Longjiao Xu, Lihong Li, Dawei Fu, Daichang Tongji Univ Coll Elect & Informat Engn Shanghai 200092 Peoples R China

ISBN: (纸本)9781628411867

In this paper, a fast and effective 3D reconstruction method for the growth of greenhouse tomato plant is proposed by using real organ samples and a parametric L-system. By analyzing the stereo structure of tomato plant, we extracts rules and parameters to assemble an L-system that is able to simulate the plant growth, and then the components of the L-system are translated into plant organ entities via image processing and computer graphics techniques. This method can efficiently and faithfully simulate the growing process of the greenhouse tomato plant.

关键词： visualization parametric L-system 3D reconstruction greenhouse plants

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computer and Computing Technologies in Agriculture IX 1

引用

丛书名： IFIP Advances in Information and Communication Technology

1000年

作者： Daoliang Li Zhenbo Li

ISBN: (数字)9783319483573

ISBN: (纸本)9783319483566;9783319839202

The two volumes IFIP AICT 478 and 479 constitute the refereed post-conference proceedings of the 9th IFIP WG 5.14 international conference on computer and Computing Technologies in Agriculture, CCTA 2015, held in Beijing, China, in September 2015. The 122 revised papers included in this volume were carefully selected from 237 submissions. They cover a wide range of interesting theories and applications of information technology in agriculture, including intelligent sensing, monitoring and automatic control technology; key technology and models of the Internet of things; intelligent technology for agricultural equipment; computer vision; computer graphics and virtual reality; computer simulation, optimization and modeling; cloud computing and agricultural applications; agricultural big data; decision support systems and expert systems; 3s technology and precision agriculture; quality and safety of agricultural products; detection and tracing technology; and agricultural electronic commerce technology.

关键词： computer Applications Information Systems and Communication Service Agriculture Math Applications in computer Science computer Systems Organization and Communication Networks computer imaging, Vision, Pattern Recognition and graphics

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Robust visualization of the dental occlusion by a double scan procedure

Robust visualization of the dental occlusion by a double sca...

引用

8th international conference on Medical Image Computing and computer-Assisted Intervention

作者： Schutyser, F Swennen, G Suetens, P Katholieke Univ Leuven Univ Hosp Gasthuisberg Dept Med Image Comp ESATPSIFac Med Louvain Belgium Katholieke Univ Leuven Univ Hosp Gasthuisberg Dept Med Image Comp ESATPSIFac Engn Louvain Belgium Univ Libre Bruxelles Univ Hosp Brugmann Dept Plast Surg Brussels Belgium

ISBN: (纸本)3540293272

A detailed visualization of the dental occlusion in 3D image-based planning environments for oral and maxillofacial planning is important. With CT imaging however, this occlusion is often deteriorated by streak artifacts caused by amalgam fillings. Moreover, more detailed surface information at the level of the dental cuspids is often desired. In this paper, a double scan technique is introduced to image the dental occlusion by means of a newly designed 3D splint. The patient wears this splint between the upper and lower teeth during CT-scan. In a second step, the splint is positioned between the plaster casts of the upper and lower jaw, and this setup is scanned. Based on markers in the 3D splint, both data sets are fused and a combined visualization is possible, The accuracy, robustness and applicability in clinical routine is shown. This technology enables meticulous 3D cephalometric analysis, detailed maxillofacial planning and opens possibilities towards intraoperative support.

关键词： Dentistry

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Low-cost portable system for medical image visualization 2

Low-cost portable system for medical image visualization

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2nd international conference on Self Sustainable Artificial Intelligence Systems, ICSSAS 2024

作者： Auccahuasi, Wilver Urbano, Kitty Yucra-Sotomayor, Daniel Junco-Quijandria, Ismael Campos-Sobrino, Mariana Gonzales-Flores, Ana Universidad Privada del Norte Lima Peru Universidad Cientifica del Sur Lima Peru Universidad Nacional Federico Villarreal Lima Peru Universidad Autonoma de Ica Lima Peru

ISBN: (纸本)9798350368413

Nowadays, medical images are a fundamental tool for the diagnosis and treatment of many diseases and ailments, thus requiring a considerable computational infrastructure, consisting of hardware and software;in hardwarese requires a processor of the latest generation accompanied by a graphic processing unit, which helps the visualization of the images. In relation to the necessary software, computer programs are required that can read, process and visualize the images in DICOM format, which is the standard format. In this work describe the use and exploitation of the Nvidia Tegra K1 development unit, being an embedded device with high computational capacity because it has a CPU and a GPU, which allows to work with different applications for the visualization of DICOM images, the present the configuration of the device as an integrated unit, The device can be used as a portable workstation, which would allow to perform field work in areas where there is no access to a health center, where health personnel can visit patients, which helps to diagnose and provide health services in remote populations. The device can perform multiple functionalities, depending on the program to be worked. © 2024 IEEE.

关键词： graphics processing unit

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