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sketch-based interfaces and modeling 2012

ISBN: (纸本)9783905674422

The proceedings contain 13 papers. The topics discussed include: sketch modeling of seismic horizons from uncertainty;geological storytelling - graphically exploring and communicating geological sketches;RedDog: a smart sketch interface for autonomous aerial systems;concepture: a regular language based framework for recognizing gestures with varying and repetitive patterns;SetPad: a sketch-based tool for exploring discrete math set problems;Newtons pen II: an intelligent, sketch-based tutoring system and its sketch processing techniques;exploiting artistic cues to obtain line labels for free-hand sketches;mobile vision-based sketch recognition with SPARK;I don't believe my eyes! geometric sketch recognition for a computer art tutorial;treesketch: interactive procedural modeling of trees on a tablet;and just DrawIt: a 3D sketching system.

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Interactive Image-Guided modeling of Extruded Shapes

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COMPUTER GRAPHICS FORUM 2014年第7期33卷 101-110页

作者： Cao, Yan-Pei Ju, Tao Fu, Zhao Hu, Shi-Min Tsinghua Univ Tsinghua Natl Lab Informat Sci & Technol Beijing Peoples R China Tsinghua Univ Dept Comp Sci & Technol Beijing Peoples R China Washington Univ St Louis MO 63130 USA

A recent trend in interactive modeling of 3D shapes from a single image is designing minimal interfaces, and accompanying algorithms, for modeling a specific class of objects. Expanding upon the range of shapes that existing minimal interfaces can model, we present an interactive image-guided tool for modeling shapes made up of extruded parts. An extruded part is represented by extruding a closed planar curve, called base, in the direction orthogonal to the base. To model each extruded part, the user only needs to sketch the projected base shape in the image. The main technical contribution is a novel optimization-based approach for recovering the 3D normal of the base of an extruded object by exploring both geometric regularity of the sketched curve and image contents. We developed a convenient interface for modeling multi-part shapes and a method for optimizing the relative placement of the parts. Our tool is validated using synthetic data and tested on real-world images.

关键词： Categories and Subject Descriptors (according to ACM CCS) I.3.m [Computer Graphics]: Miscellaneous&mdash image-based modeling

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sketch-based interfaces for modeling and users' needs: Redefining connections

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AI EDAM-ARTIFICIAL INTELLIGENCE FOR ENGINEERING DESIGN ANALYSIS AND MANUFACTURING 2012年第3期26卷 281-301页

作者： Elsen, Catherine Demaret, Jean-Noel Yang, Maria C. Leclercq, Pierre Univ Liege LUCID B-4000 Liege Belgium MIT Dept Mech Engn Cambridge MA 02139 USA MIT Engn Syst Div Cambridge MA 02139 USA

The goal of this paper is to reexamine assumptions about sketch-based interfaces for modeling in the context of designers' needs and practices. Research questions examine (a) the type of sketch support and (b) the timing of support. Both concepts try to determine when, what, why and how to augment design processes in a way that is useful to designers. Two experiments (one in architecture and one in product design) based on ergonomics theory are conducted and intend to question some of these assumptions. The Port Zeeland experiment examines how 20 novices perceive and copy a blurred architectural sketch, which provides clues for a sketch interpretation system. The "Tragere" experiment studies how 12 professional product designers, some of whom are "idea generators" and others "idea pursuers," perceive, recognize, and handle a design sketch. The results take a designer's point of view in assessing the timing and value of sketch assistance in product design. The quantitative data analysis provides rich clues about when, why and how product sketches should be supported. The paper explores the strategies developed by designers to perceive and recognize graphical content and discusses the generation of three-dimensional volumes, the univocity state between sketches and three-dimensional models, and the treatment of features in freehand sketches. The paper concludes with observations on the timing and value of support, as first integrated in NEMo, a tool for early stage architectural design, and then in PEPS3, an early stage framework for product design.

关键词： Architecture Design Processes Product Design sketch-based Interface for modeling Users' Needs

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sketch-based interfaces and modeling

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2012年

作者： Joaquim Jorge Faramarz Samavati

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Special section on the 2011 joint symposium on computational aesthetics (CAe), non-photorealistic animation and rendering (NPAR), and sketch-based interfaces and modeling (SBIM)

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COMPUTERS & GRAPHICS-UK 2012年第6期36卷 A3-A5页

作者： Isenberg, Tobias Asente, Paul Collomosse, John Sezgin, T. Metin Univ Groningen Johann Bernoulli Inst Math & Comp Sci NL-9700 AB Groningen Netherlands Univ Surrey Ctr Vis Speech & Signal Guildford GU2 5XH Surrey England Koc Univ Istanbul Turkey CNRS INRIA Paris France

The year 2011 marked the first year that the conferences CAe, NPAR, and SBIM all combined forces and in August organized a joint symposium in Vancouver, Canada, co-located with ACM SIGGRAPH. All fields share a strong interest in expressiveness-CAe with respect to the expressiveness of aesthetics, NPAR with respect to creating expressive imagery, and SBIM with respect to expressive interaction and modeling. The joint symposium including the associated art show thus was a tremendous success, attracting 161 participants from all over the world.

关键词： Caelum Esthetics Joints Rendering Animation

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SPACEsketch: Shape modeling with 3D meshes and control curves in stereoscopic environments

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COMPUTERS & GRAPHICS-UK 2012年第5期36卷 526-533页

作者： Nam, Sanghun Chai, Youngho Chung Ang Univ Seoul South Korea

This paper introduces SPACEsketch, a new kind of sketch-based modeling system that can sketch free-form surface in space. This modeling system combines the advantages of a direct mesh-based sketch in which the user can draw the mesh directly in the space by moving the wand and the control curve sketch to express the detailed shape of the model. The created surface is also divided by using the control curve so that different resolution surfaces can be set for each surface and partially complicated parts can be sketched. While using SPACEsketch, we introduced the advantages of using a new interface that uses mesh-based sketch and control curve sketch simultaneously to create various models and how to apply multi-resolution. Through this process, we show that mesh-based sketch and control curve sketch simultaneously to complement each other in a multi-resolution real time environment is very useful in concept sketching in a 3D environment using a spatial input device. (C) 2012 Elsevier Ltd. All rights reserved.

关键词： 3D shape modeling Spatial sketching Mesh-based modeling Control curve Grid-based modeling sketch-based interfaces Stereoscopic environment

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sketch modeling of seismic horizons from uncertainty

Sketch modeling of seismic horizons from uncertainty

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sketch-based interfaces and modeling 2012

作者： Amorim, Ronan Vital Brazil, Emilio Patel, Daniel Costa Sousa, Mario University of Calgary Canada University of Bergen Norway

ISBN: (纸本)9783905674422

Petroleum reservoir model building is a fundamental but complex task present in all stages of oil/gas exploration and production (E&P). Reservoir models are built incrementally using multi-disciplinary data (e.g. from geophysics, geology, reservoir engineering) and the domain expert interpretation of that data. The first reservoir models are constructed at the appraisal stage, where the available data presents inaccuracies and a high degree of uncertainty. In this paper we present a set of sketch-based interface and modeling operators integrated in a system for the early appraisal stage in oil/gas E&P for the tasks of seismic interpretation and reservoir model building. Our system allows the user to sketch directly over the raw seismic reflection volume and its derived data. These data guide the expert in the key tasks of seismic interpretation and building the structural framework of the reservoir. We propose a novel set of sketch-based modeling operators designed by specific domain requirements from geophysics and geology. A novel architecture using adaptive meshes is also developed to create a more flexible sketch-based system. © 2012 The Eurographics Association.

关键词： Seismology

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Newtons pen II: An intelligent, sketch-based tutoring system and its sketch processing techniques

Newtons pen II: An intelligent, sketch-based tutoring system...

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sketch-based interfaces and modeling 2012

作者： Lee, C. Jordan, J. Stahovich, T.F. Herold, J. Department of Mechanical Engineering University of California Riverside CA 92521 United States Department of Computer Science University of California Riverside CA 92521 United States

ISBN: (纸本)9783905674422

We present a pen-based intelligent tutoring system (ITS) for undergraduate Statics which scaffolds students in the construction of free body diagrams and equilibrium equations. Most existing ITSs rely on traditional WIMP (Windows, Icons, Menus, Pointers) interfaces, which often require the student to select the correct answer from among a set of predefined choices. Our system, by contrast, guides students in constructing solutions from scratch, mirroring the way they ordinarily solve problems, which recent research suggests is important for effective instruction. Our system employs several new techniques for sketch understanding, including a simple-to-implement stroke merging technique, a stroke clustering technique, and a technique that uses a Hidden Markov Model to correct interpretation errors in equations. Our tutoring system was deployed in an undergraduate Statics course at our university. Attitudinal surveys indicate that the tutoring system is preferable to traditional WIMP-based systems and is an effective educational tool. © 2012 The Eurographics Association.

关键词： Students

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Treesketch: Interactive procedural modeling of trees on a tablet

TreeSketch: Interactive procedural modeling of trees on a ta...

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sketch-based interfaces and modeling 2012

作者： Longay, Steven Runions, Adam Boudon, Frédéric Prusinkiewicz, Przemyslaw University of Calgary Canada CIRAD/INRIA Virtual Plant Team UMR AGAP Montpellier France

ISBN: (纸本)9783905674422

Treesketch is a system for modeling complex trees that look natural yet are creatively designed. The system integrates procedural tree generation with a multi-touch tablet interface that provides detailed control of tree form. The procedural component is based on the concept of tree self-organization and simulates competition of branches for space and light as the tree develops from a seedling. The modeler can control this process by directing growth with a procedural brush, changing parameters as the tree grows, interleaving controlled and autonomous growth, and editing generated forms. Complex trees can be created in a matter of seconds. © 2012 The Eurographics Association.

关键词： Forestry

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RedDog: A smart sketch interface for autonomous aerial systems

RedDog: A smart sketch interface for autonomous aerial syste...

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sketch-based interfaces and modeling 2012

作者： Cummmings, D. Fymat, S. Hammond, T. Department of Computer Science and Engineering Texas A and M University College Station TX United States Polarity Labs. 801 Century Park East Los Angeles CA United States

ISBN: (纸本)9783905674422

In order to decrease the number of casualties and limit the number of potentially dangerous situations that Soldiers encounter, the US military is exploring the use of autonomous Unmanned Aircraft Systems (UAS) to fulfill air support requests (ASR) from the field. The interface for such a system must provide interaction in modes that facilitate the completion of the support request in various scenarios, and it must be usable by operators of all skill levels, without requiring extensive training or considerable expertise. sketches are a simple and natural way to exchange graphical information and ideas. In this paper we present the development of an interface that that allows the user to plan an ASR using sketch and other inputs while conforming to the userŠs mental model of natural interaction. © 2012 The Eurographics Association.

关键词： Antennas

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