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Edit Propagation via Edge-Aware Filtering

Journal of computer Science & technology 2012年第4期27卷 830-840页

作者：胡伟董朝袁国栋 Department of Computer Science and Technology Beijing University of Chemical Technology Program of Computer Graphics Cornell University Department of Computer Science and Technology Tsinghua University

This paper presents a novel framework for efficiently propagating the stroke-based user edits to the regions with similar colors and locations in high resolution images and videos. Our framework is based on the key observation that the edit propagation intrinsically can also be achieved by utilizing recently proposed edge-preserving filters. Therefore, instead of adopting the traditional global optimization which may involve a time-consuming solution, our algorithm propagates edits with the aid of the edge-preserve filters. Such a propagation scheme has low computational complexity and supports multiple kinds of strokes for more flexible user interactions. Further, our method can be easily and efficiently implemented in GPU. The experimental results demonstrate the efficiency and user-friendliness of our approach.

关键词： edit propagation edge-aware domain transform guided filter

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The basic utility vehicle (BUV) - A humanitarian capstone project

The basic utility vehicle (BUV) - A humanitarian capstone pr...

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2003 ASEE Annual Conference and Exposition: Staying in Tune with Engineering Education

作者： Acheson, Douglas C. Computer Graphics Technology Indiana Univ. Purdue U. Indianapolis Computer Graphics Technology Program Purdue Sch. of Eng. and Technology IUPUI

Engineering and technology schools, departments and students are encouraged to explore a capstone design project option that possesses significant, far-reaching implications for international humanitarian application. An Indianapolis, Indiana-based non-profit organization called the "Institute of Affordable Transportation (IAT)" engages young engineering and technology talent through service-based capstone projects to design and develop a class of transportation known as a Basic Utility Vehicle (BUY). The IAT's mission is to improve living standards and enable economic growth in the Third World by creating a simple vehicte that can be assembled almost anywhere, by almost anyone. To propagate this initiative, the IAT hosts an annual collegiate BUY competition that tests student-designed prototype BUV's. Ultimately, the student efforts from these competitions will help provide mobility, freedom and economic hope to people in rural areas of devebping countries. This paper introduces the organization that is the genesis of this initiative, gives an overview of the first two IAT collegiate competitions (including examples of student-designed and other vehicles), reflects on the academic benefits to participating students and faculty and culminates with an invitation to academic institutions to become involved in this life-changing initiative.

关键词： Public utilities

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Unbiased sampling techniques for image synthesis 91

Unbiased sampling techniques for image synthesis

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18th Annual Conference on computer graphics and Interactive Techniques, SIGGRAPH 1991

作者： Kirk, David Arvo, James California Institute of Technology Computer Graphics 350-74 PasadenaCA91125 United States Program of Computer Graphics Cornell University IthacaNY14853 United States

ISBN: (纸本)0897914368

We examine a class of adaptive sampling techniques employed in image synthesis and show that those commonly used for efficient anti-aliasing are statistically biased. This bias is dependent upon the image function being sampled as well as the strategy for determining the number of samples to use. It is most prominent in areas of high contrast and is attributable to early stages of sampling systematically favoring one extreme or the other. If the expected outcome of the entire adaptive sampling algorithm is considered, we find that the bias of the early decisions is stiO present in the final estimator. We propose an alternative strategy for performing adaptive sampling that is unbiased but potentially more costly. We conclude that it may not always be practical to mitigate this source of bias, but as a source of error it should be considered when high accuracy and image fidelity are a central concern. © 1991 ACM.

关键词： Anti-aliasing

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Utilizing the nurbs modeler Rhino® for economical and intuitive 3D product development

Utilizing the nurbs modeler Rhino&reg for economical and int...

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Proceedings: Electrical Insulation Conference and Electrical Manufacturing and Coil Winding technology

作者： Acheson, Douglas C. Hardin, Jonathan D. Purdue Sch. of Eng. and Technology IUPUI Dept. of Comp. Graphics Technology IUPUI Computer Graphics Technology Program IUPUI

ISBN: (纸本)0941783235

Many manufacturing firms in today's economy are reluctant to engage their design personnel in costly, difficult to operate 3D CAD packages. While the attributes of designing in 3D are numerous and beneficial, committing to a high-end design software package often seems unjustifiable, especially when only a few new designs are required. An extremely attractive alternative to this dilemma is the integration of a powerful and innovative 3D modeling software called Rhinoceros®, or Rhino® for short. While costing substantially less than most 3D modeling programs, Rhino supplies an impressive array of advanced capabilities not found on many of the most powerful design software's on the market. Though not considered a parametric or feature-based modeler, Rhino often supplements these costly packages to accomplish complex surfacing challenges. This paper introduces this incredible program as it applies to the motor manufacturing industry and highlights the ease-of-use and incredible power of this modeling and presentation software. Additionally, an overview of different types of 3D modeling software is given in contextual reference to where this product may fit into a firm's design initiatives.

关键词： Product development

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Microfacet Models for Refraction through Rough Surfaces

Microfacet Models for Refraction through Rough Surfaces

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18th Eurographics Symposium on Rendering Techniques, EGSR 2007

作者： Walter, Bruce Marschner, Stephen R. Li, Hongsong Torrance, Kenneth E. Program of Computer Graphics Cornell University United States Beijing Institute of Technology China

ISBN: (纸本)9783905673524

Microfacet models have proven very successful for modeling light reflection from rough surfaces. In this paper we review microfacet theory and demonstrate how it can be extended to simulate transmission through rough surfaces such as etched glass. We compare the resulting transmission model to measured data from several real surfaces and discuss appropriate choices for the microfacet distribution and shadowing-masking functions. Since rendering transmission through media requires tracking light that crosses at least two interfaces, good importance sampling is a practical necessity. Therefore, we also describe efficient schemes for sampling the microfacet models and the corresponding probability density functions. © The Eurographics Association 2007.

关键词： Light reflection

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Fast, minimum storage ray/triangle intersection 05

Fast, minimum storage ray/triangle intersection

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ACM SIGGRAPH 2005 International Conference on computer graphics and Interactive Techniques, SIGGRAPH 2005

作者： Möller, Tomas Trumbore, Ben Prosolvia Claxus AB Chalmers University of Technology Sweden Program of Computer Graphics Cornell University United States

ISBN: (纸本)9781450378338

We present a clean algorithm for determining whether a ray intersects a triangle. The algorithm translates the origin of the ray and then changes the base of that vector which yields a vector (t u v)T, where t is the distance to the plane in which the triangle lies and (u, v) represents the coordinates inside the triangle. One advantage of this method is that the plane equation need not be computed on the fly nor be stored, which can amount to significant memory savings for triangle meshes. As we found our method to be comparable in speed to previous methods, we believe it is the fastest ray/triangle intersection routine for triangles which do not have precomputed plane equations.

关键词： Ray tracing

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Hybrid online autotuning for parallel ray tracing

Hybrid online autotuning for parallel ray tracing

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19th Eurographics Symposium on Parallel graphics and Visualization, EGPGV 2019

作者： Herveau, K. Pfaffe, P. Tillmann, M. Tichy, W.F. Dachsbacher, C. Computer Graphics Group Karlsruhe Institute of Technology Germany Institute for Program Structures and Data Organization Karlsruhe Institute of Technology Germany

ISBN: (纸本)9783038680796

Acceleration structures are key to high performance parallel ray tracing. Maximizing performance requires configuring the degrees of freedom (e.g., construction parameters) these data structures expose. Whether a parameter setting is optimal depends on the input (e.g., the scene and view parameters) and hardware. Manual selection is tedious, error prone, and is not portable. To automate the parameter selection task we use a hybrid of model-based prediction and online autotuning. The combination benefits from the best of both worlds: One-shot configuration selection when inputs are known or similar, effective exploration of the configuration space otherwise. Online tuning additionally serves to train the model on real inputs without requiring a-priori training samples. Online autotuning outperforms best-practice configurations recommended by the literature, by up to 11% median. The model predictions achieve 95% of the online autotuning performance while reducing 90% of the autotuner overhead. Hybrid online autotuning thus enables always-on tuning of parallel ray tracing. © 2019 Eurographics Association. All rights reserved.

关键词： Ray tracing

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Edit propagation via edge-aware filtering

Edit propagation via edge-aware filtering

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作者： Hu, Wei Dong, Zhao Yuan, Guo-Dong Department of Computer Science and Technology Beijing University of Chemical Technology Beijing 100028 China Program of Computer Graphics Cornell University Ithaca 14853 United States Department of Computer Science and Technology Tsinghua University Beijing 100084 China

关键词： Global optimization

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Use of computer graphic simulation to explain color histogram structure

Use of computer graphic simulation to explain color histogra...

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Final program and Proceedings of the 5th IS and T/SID Color Imaging Conference: Color Science, Systems and Applications

作者： Peng, Liang Lafortune, Eric P.F. Greenberg, Donald P. Sobel, Irwin Cornell University Program of Computer Graphics Ithaca NY United States Printing Technology Department Hewlett Packard Laboratories Palo Alto CA United States

In this paper, we discuss the use of computer graphics techniques to model and explain the structures commonly observed in color histograms of images. This includes an accurate simulation of the physical reflection and transport behavior of light energy within 3D environments, the precise modeling of an image capturing system, and an interactive visualization module to display color histograms. Based on the fundamental rendering equation that describes light reflection and transport in the 3D world, we classify the color histogram structures of color images, and relate them to various physical components in image formation, including scene illumination, material reflectance properties, and the surface geometry of objects. We further show how these histogram structures can be effected by the artifacts caused by the limitation of image capturing systems. Our results demonstrate that the use of accurate simulation procedures under a precisely controlled computer graphic environment can clearly illustrate the causes of the structures observed, and can provide unique insights and explanations of image formation.

关键词： Color

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Teaching beyond sustainable awareness: Graduating leed-accredited professionals

Teaching beyond sustainable awareness: Graduating leed-accre...

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114th Annual ASEE Conference and Exposition, 2007

作者： Kilmer, Rosemary Kilmer, Lisa Purdue University United States Department of Visual and Performing Arts Council of Interior Design Accreditation Department of Computer Graphics Technology Interior Design Program Purdue University United States

No abstract available

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