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Displaying 1-40 out of 40 total
Polymorph: Morphing Among Multiple Images
Found in: IEEE Computer Graphics and Applications
By Seungyong Lee, George Wolberg, Sung Yong Shin
Issue Date:January 1998
pp. 58-71
<p>Polymorph extends conventional morphing to derive morphed images from more than two images at once, effectively integrating geometric manipulations and color blending.</p>
 
Design and Implementation of Context-Awareness Simulation Toolkit for Context learning
Found in: Sensor Networks, Ubiquitous, and Trustworthy Computing, International Conference on
By InSu Kim, HeeMan Park, BongNam Noh, YoungLok Lee, SeungYong Lee, HyungHyo Lee
Issue Date:June 2006
pp. 96-103
The study deals with the most important elements of ubiquitous computing, that is, the toolkit to acquire, express and safely use the context information. To do so, we introduce CAST(Context-Awareness Simulation Toolkit) and show how it works. CAST generat...
 
Automatic Upright Adjustment of Photographs With Robust Camera Calibration
Found in: IEEE Transactions on Pattern Analysis and Machine Intelligence
By Hyunjoon Lee,Eli Shechtman,Jue Wang,Seungyong Lee
Issue Date:May 2014
pp. 1-1
Man-made structures often appear to be distorted in photos captured by casual photographers, as the scene layout often conflicts with how it is expected by human perception. In this paper, we propose an automatic approach for straightening up slanted man-m...
 
Automatic upright adjustment of photographs
Found in: 2012 IEEE Conference on Computer Vision and Pattern Recognition (CVPR)
By Hyunjoon Lee,E. Shechtman, Jue Wang, Seungyong Lee
Issue Date:June 2012
pp. 877-884
Man-made structures often appear to be distorted in photos captured by casual photographers, as the scene layout often conflicts with how it is expected by human perception. In this paper we propose an automatic approach for straightening up slanted man-ma...
 
Random Accessible Mesh Compression Using Mesh Chartification
Found in: IEEE Transactions on Visualization and Computer Graphics
By Sungyul Choe, Junho Kim, Haeyoung Lee, Seungyong Lee
Issue Date:January 2009
pp. 160-173
Previous mesh compression techniques provide decent properties such as high compression ratio, progressive decoding, and out-of-core processing. However, only a few of them supports the random accessibility in decoding, which enables the details of any spe...
 
Abstract Line Drawings from 2D Images
Found in: Computer Graphics and Applications, Pacific Conference on
By Minjung Son, Henry Kang, Yunjin Lee, Seungyong Lee
Issue Date:November 2007
pp. 333-342
We present a novel scheme for automatically generating line drawings from 2D images, aiming to facilitate effective visual communication. In contrast to conventional edge detectors, our technique imitates the human line drawing process and consists of two ...
 
Feature Sensitive Mesh Segmentation with Mean Shift
Found in: Shape Modeling and Applications, International Conference on
By Hitoshi Yamauchi, Seungyong Lee, Yunjin Lee, Yutaka Ohtake, Alexander Belyaev, Hans-Peter Seidel
Issue Date:June 2005
pp. 238--245
Feature sensitive mesh segmentation is important for many computer graphics and geometric modeling applications. In this paper, we develop a mesh segmentation method which is capable of producing high-quality shape partitioning. It respects fine shape feat...
 
Intelligent Mesh Scissoring Using 3D Snakes
Found in: Computer Graphics and Applications, Pacific Conference on
By Yunjin Lee, Seungyong Lee, Ariel Shamir, Daniel Cohen-Or, Hans-Peter Seidel
Issue Date:October 2004
pp. 279-287
Mesh partitioning and parts extraction have become key ingredients for many mesh manipulation applications both manual and automatic. In this paper, we present an intelligent scissoring operator for meshes which supports both automatic segmentation and man...
 
Neural Mesh Ensembles
Found in: 3D Data Processing Visualization and Transmission, International Symposium on
By Ioannis Ivrissimtzis, Yunjin Lee, Seungyong Lee, Won-Ki Jeong, Hans-Peter Seidel
Issue Date:September 2004
pp. 308-315
This paper proposes the use of neural network ensembles to boost the performance of a neural network based surface reconstruction algorithm. Ensemble is a very popular and powerful statistical technique based on the idea of averaging several outputs of a p...
 
Feature-Based Surface Light Field Morphing
Found in: Computer Graphics and Applications, Pacific Conference on
By Eunhee Jeong, Mincheol Yoon, Yunjin Lee, Minsu Ahn, Seungyong Lee, Baining Guo
Issue Date:October 2003
pp. 215
A surface light field is a function that gives the colors of each object point viewed from different directions. Object representation with a surface light field provides a nice structure for 3D photography. This paper presents a feature-based morphing tec...
 
Handling outliers in non-blind image deconvolution
Found in: Computer Vision, IEEE International Conference on
By Sunghyun Cho, Jue Wang,Seungyong Lee
Issue Date:November 2011
pp. 495-502
Non-blind deconvolution is a key component in image deblurring systems. Previous deconvolution methods assume a linear blur model where the blurred image is generated by a linear convolution of the latent image and the blur kernel. This assumption often do...
 
Flow-Based Image Abstraction
Found in: IEEE Transactions on Visualization and Computer Graphics
By Henry Kang, Seungyong Lee, Charles K. Chui
Issue Date:January 2009
pp. 62-76
We present a non-photorealistic rendering technique that automatically delivers a stylized abstraction of a photograph. Our approach is based on shape/color filtering guided by a vector field that describes the flow of salient features in the image. This f...
 
Removing Non-Uniform Motion Blur from Images
Found in: Computer Vision, IEEE International Conference on
By Sunghyun Cho, Yasuyuki Matsushita, Seungyong Lee
Issue Date:October 2007
pp. 1-8
We propose a method for removing non-uniform motion blur from multiple blurry images. Traditional methods focus on estimating a single motion blur kernel for the entire image. In contrast, we aim to restore images blurred by unknown, spatially varying moti...
 
Light Field Morphing Using 2D Features
Found in: IEEE Transactions on Visualization and Computer Graphics
By Lifeng Wang, Stephen Lin, Seungyong Lee, Baining Guo, Heung-Yeung Shum
Issue Date:January 2005
pp. 25-34
We present a 2D feature-based technique for morphing 3D objects represented by light fields. Existing light field morphing methods require the user to specify corresponding 3D feature elements to guide morph computation. Since slight errors in 3D specifica...
 
View-Dependent Streaming of Progressive Meshes
Found in: Shape Modeling and Applications, International Conference on
By Junho Kim, Seungyong Lee, Leif Kobbelt
Issue Date:June 2004
pp. 209-220
<p>Multiresolution geometry streaming has been well studied in recent years. The client can progressively visualize a triangle mesh from the coarsest resolution to the finest one while a server successively transmits detail information. However, the ...
 
The Dichotomy of Presence Elements: The Where and What
Found in: Virtual Reality Conference, IEEE
By Dongsik Cho, Jihye Park, Gerard Jounghyun Kim, Sangwoo Hong, Sungho Han, Seungyong Lee
Issue Date:March 2003
pp. 273
No summary available.
   
Mesh Metamorphosis with Topology Transformations
Found in: Computer Graphics and Applications, Pacific Conference on
By Minsu Ahn, Seungyong Lee
Issue Date:October 2002
pp. 481
3D mesh morphing based on a metamesh has fundamental limitations of complicated in-between meshes and no topology (connectivity) changes in a metamorphosis. This paper presents a novel approach for 3D mesh morphing, which is not based on a metamesh. The ap...
   
Local Injectivity Conditions of 2D and 3D Uniform Cubic B-Spline Functions
Found in: Computer Graphics and Applications, Pacific Conference on
By Yongchoel Choi, Seungyong Lee
Issue Date:October 1999
pp. 302
Uniform cubic B-spline functions have been used for mapping functions in various areas such as image warping and morphing, 3D deformation, and volume morphing. The injectivity (one-to-one property) of a mapping function is important to obtain good results ...
 
Scattered Data Interpolation with Multilevel B-Splines
Found in: IEEE Transactions on Visualization and Computer Graphics
By Seungyong Lee, George Wolberg, Sung Yong Shin
Issue Date:July 1997
pp. 228-244
<p><b>Abstract</b>—This paper describes a fast algorithm for scattered data interpolation and approximation. Multilevel B-splines are introduced to compute a <tmath>$C^2$</tmath>-continuous surface through a set of irregularly...
 
Image Metamorphosis with Scattered Feature Constraints
Found in: IEEE Transactions on Visualization and Computer Graphics
By Seungyong Lee, George Woberg, Kyung-Yong Chwa, Sung Yong Shin
Issue Date:December 1996
pp. 337-354
<p><b>Abstract</b>—This paper describes an image metamorphosis technique to handle scattered feature constraints specified with points, polylines, and splines. Solutions to the following three problems are presented: feature specification...
 
Robust color-to-gray via nonlinear global mapping
Found in: ACM Transactions on Graphics (TOG)
By Cheolhun Jang, Julien Demouth, Seungyong Lee, Yongjin Kim, Cheolhun Jang, Julien Demouth, Seungyong Lee, Yongjin Kim
Issue Date:December 2009
pp. 1-2
This paper presents a fast color-to-gray conversion algorithm which robustly reproduces the visual appearance of a color image in grayscale. The conversion preserves feature discriminability and reasonable color ordering, while respecting the original ligh...
     
Fast motion deblurring
Found in: ACM Transactions on Graphics (TOG)
By Seungyong Lee, Sunghyun Cho, Seungyong Lee, Sunghyun Cho
Issue Date:December 2009
pp. 1-2
This paper presents a fast deblurring method that produces a deblurring result from a single image of moderate size in a few seconds. We accelerate both latent image estimation and kernel estimation in an iterative deblurring process by introducing a novel...
     
WYSIWYG Stereo Paintingwith Usability Enhancements
Found in: IEEE Transactions on Visualization and Computer Graphics
By Yongjin Kim,Holger Winnemoller,Seungyong Lee
Issue Date:July 2014
pp. 957-969
Despite increasing popularity of stereo capture and display systems, creating stereo artwork remains a challenge. This paper presents a stereo painting system, which enables effective from-scratch creation of high-quality stereo artwork. A key concept of o...
 
Out-of-Core Remeshing of Large Polygonal Meshes
Found in: IEEE Transactions on Visualization and Computer Graphics
By Minsu Ahn,I. Guskov, Seungyong Lee
Issue Date:September 2006
pp. 1221-1228
We propose an out-of-core method for creating semi-regular surface representations from large input surface meshes. Our approach is based on a streaming implementation of the MAPS remesher of Lee et al. Our remeshing procedure consists of two stages. First...
 
Line drawings via abstracted shading
Found in: ACM Transactions on Graphics (TOG)
By John F. Hughes, Lee Markosian, Seungyong Lee, Yunjin Lee
Issue Date:July 2007
pp. 1-35
We describe a GPU-based algorithm for rendering a 3D model as a line drawing, based on the insight that a line drawing can be understood as an abstraction of a shaded image. We thus render lines along tone boundaries or thin dark areas in the shaded image....
     
Stereoscopic 3D line drawing
Found in: ACM Transactions on Graphics (TOG)
By Henry Kang, Seungyong Lee, Yongjin Kim, Yunjin Lee
Issue Date:July 2013
pp. 1-13
This paper discusses stereoscopic 3D imaging based on line drawing of 3D shapes. We describe the major issues and challenges in generating stereoscopic 3D effects using lines only, with a couple of relatively simple approaches called each-eye-based and cen...
     
Displaced subdivision surfaces of animated meshes
Found in: ACM SIGGRAPH ASIA 2010 Sketches (SA '10)
By Hyunjun Lee, Minsu Ahn, Seungyong Lee
Issue Date:December 2010
pp. 1-2
We propose a novel technique for extracting a series of displaced subdivision surfaces sharing the same topology and the same displacement map from a given animated mesh. Our motion-based mesh simplification method creates control meshes with a small numbe...
     
Real-time pencil rendering
Found in: Proceedings of the 3rd international symposium on Non-photorealistic animation and rendering (NPAR '06)
By Hyunjun Lee, Seungyong Lee, Sungtae Kwon
Issue Date:June 2006
pp. 37-45
This paper presents a real-time technique for rendering 3D meshes in the pencil drawing style. We analyze the characteristics of pencil drawing and incorporate them into the rendering process, which is fully implemented on a GPU. For object contours, we pr...
     
Multi-scale line drawings from 3D meshes
Found in: Proceedings of the 2006 symposium on Interactive 3D graphics and games (SI3D '06)
By Alex Ni, Kyuman Jeong, Lee Markosian, Seungyong Lee
Issue Date:March 2006
pp. 133-137
We present a method to view-dependently control the size of shape features depicted in computer-generated line drawings of 3D meshes. Our method exhibits good temporal coherence during level of detail transitions, and is fast because the calculations are c...
     
Recent advances in image deblurring
Found in: SIGGRAPH Asia 2013 Courses (SA '13)
By Sunghyun Cho, Seungyong Lee
Issue Date:November 2013
pp. 1-108
Motion blur is a common artifact that produces disappointing blurry images with inevitable information loss. Due to the nature of imaging sensors that accumulates incoming lights, a motion blurred image will be obtained if the camera sensor moves during ex...
     
High dynamic range imaging using coded electronic shutter
Found in: ACM SIGGRAPH 2013 Posters (SIGGRAPH '13)
By Hojin Cho, Seungyong Lee
Issue Date:July 2013
pp. 1-1
High dynamic range (HDR) imaging aims to increase the dynamic range of imaging devices, capturing better representations of target scenes. Since the seminal work of Debevec and Malik [1997], tremendous progress has been achieved utilizing multiple images o...
     
WYSIWYG stereo painting
Found in: Proceedings of the ACM SIGGRAPH Symposium on Interactive 3D Graphics and Games (I3D '13)
By Seungyong Lee
Issue Date:March 2013
pp. 169-176
Despite increasing popularity of stereo capture and display systems, creating stereo artwork remains a challenge. This paper presents a stereo painting system, which enables effective from-scratch creation of high-quality stereo artwork. A key concept of o...
     
Video deblurring for hand-held cameras using patch-based synthesis
Found in: ACM Transactions on Graphics (TOG)
By Jue Wang, Seungyong Lee, Sunghyun Cho
Issue Date:July 2012
pp. 1-9
Videos captured by hand-held Cameras often contain significant camera shake, causing many frames to be blurry. Restoring shaky videos not only requires smoothing the camera motion and stabilizing the content, but also demands removing blur from video frame...
     
Object motion based video key-frame extraction
Found in: ACM SIGGRAPH ASIA 2010 Posters (SA '10)
By Cheolhun Jang, Seungyong Lee
Issue Date:December 2010
pp. 1-1
We propose a novel method to determine the key-frame of a video, which is based on object motions. We extract foreground objects from a video using optical flow and compute the motion frequency score to find the most representative motion. The key-frame is...
     
HCCMeshes: hierarchical-culling oriented compact meshes
Found in: ACM SIGGRAPH 2010 Posters (SIGGRAPH '10)
By Bochang Moon, Seungyong Lee, Sung-Eui Yoon, Tae-Joon Kim, Yongjin Kim, Yongyoung Byun
Issue Date:July 2010
pp. 1-1
Ray tracing and collision detection are widely used for providing high-quality visualizations and user interactions. In these algorithms, we need to detect intersecting primitives between two input objects (e.g., a ray and a 3D object in ray tracing and tw...
     
Robust color-to-gray via nonlinear global mapping
Found in: ACM SIGGRAPH Asia 2009 papers (SIGGRAPH Asia '09)
By Cheolhun Jang, Julien Demouth, Seungyong Lee, Yongjin Kim
Issue Date:December 2009
pp. 1-6
This paper presents a fast color-to-gray conversion algorithm which robustly reproduces the visual appearance of a color image in grayscale. The conversion preserves feature discriminability and reasonable color ordering, while respecting the original ligh...
     
Fast motion deblurring
Found in: ACM SIGGRAPH Asia 2009 papers (SIGGRAPH Asia '09)
By Seungyong Lee, Sunghyun Cho
Issue Date:December 2009
pp. 1-6
This paper presents a fast deblurring method that produces a deblurring result from a single image of moderate size in a few seconds. We accelerate both latent image estimation and kernel estimation in an iterative deblurring process by introducing a novel...
     
Line-art illustration of dynamic and specular surfaces
Found in: ACM Transactions on Graphics (TOG)
By Jingyi Yu, Seungyong Lee, Xuan Yu, Yongjin Kim
Issue Date:December 2008
pp. 1-49
Line-art illustrations are effective tools for conveying shapes and shading of complex objects. We present a set of new algorithms to render line-art illustrations of dynamic and specular (reflective and refractive) surfaces. We first introduce a real-time...
     
Coherent line drawing
Found in: Proceedings of the 5th international symposium on Non-photorealistic animation and rendering (NPAR '07)
By Charles K. Chui, Henry Kang, Seungyong Lee
Issue Date:August 2007
pp. 43-50
This paper presents a non-photorealistic rendering technique that automatically generates a line drawing from a photograph. We aim at extracting a set of coherent, smooth, and stylistic lines that effectively capture and convey important shapes in the imag...
     
Connectivity transformation for mesh metamorphosis
Found in: Proceedings of the 2004 Eurographics/ACM SIGGRAPH symposium on Geometry processing (SGP '04)
By Hans-Peter Seidel, Minsu Ahn, Seungyong Lee
Issue Date:July 2004
pp. 75-82
In previous mesh morphing techniques, the vertex set and connectivity of an in-between mesh are fixed and only the vertex positions are interpolated between input meshes. With this restriction, to accurately represent both source and target shapes, an in-b...
     
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