Wyniki wyszukiwania dla: Sung-Eui Yoon

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Inexpensive indoor acoustic material estimation for realistic sound propagation

Taeyoung Kim, Inkyu An, Sung‐eui Yoon

Computer Animation and Virtual Worlds > 34 > 5 > n/a - n/a

For the realistic and immersive experience in a virtual environment, it is important to estimate and reflect the acoustic characteristic of the real indoor scenes. This article proposes a method of directly measuring the reflection coefficient of a surface, which is an acoustic characteristics in the real environment. Because expensive optimization‐based studies that mainly aim to reproduce recorded...

artykuł

Gradient Outlier Removal for Gradient‐Domain Path Tracing

Saerom Ha, Sojin Oh, Jonghee Back, Sung‐Eui Yoon, więcej

Computer Graphics Forum > 38 > 2 > 245 - 253

We present a new outlier removal technique for a gradient‐domain path tracing (G‐PT) that computes image gradients as well as colors. Our approach rejects gradient outliers whose estimated errors are much higher than those of the other gradients for improving reconstruction quality for the G‐PT. We formulate our outlier removal problem as a least trimmed squares optimization, which employs only a...

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Feature Generation for Adaptive Gradient‐Domain Path Tracing

Jonghee Back, Sung‐Eui Yoon, Bochang Moon

Computer Graphics Forum > 37 > 7 > 65 - 74

In this paper, we propose a new technique to incorporate recent adaptive rendering approaches built upon local regression theory into a gradient‐domain path tracing framework, in order to achieve high‐quality rendering results. Our method aims to reduce random artifacts introduced by random sampling on image colors and gradients. Our high‐level approach is to identify a feature image from noisy gradients,...

rozdział

Data-driven kinodynamic RRT

Junghwan Lee, Heechan Shin, Sung-eui Yoon

2017 18th International Conference on Advanced Robotics (ICAR) > 91 - 98

2017 18th International Conference on Advanced Robotics (ICAR)

We present a novel, data-driven kinodynamic motion planner. Our sampling-based planner is based on using a physics simulator as a black box to compute a trajectory considering dynamics, even when we cannot derive exact propagation functions. To improve its overall efficiency, we pre-compute a motion database containing different motions simulated with different controls and states defined in the local...

artykuł

Physically inspired, interactive lightning generation

Jeongsu Yun, Myungbae Son, Byungyoon Choi, Theodore Kim, więcej

Computer Animation and Virtual Worlds > 28 > 3-4 > n/a - n/a

We present an interactive technique for generating realistic lightning. Our method captures the main characteristics of the dielectric breakdown model, a physical model for lightning formation. Our algorithm uses a distance‐based approximation to quickly compute the electric potentials of different charge types. In particular, we use a rational function in lieu of summed potentials to better produce...

artykuł

Rank-based voting with inclusion relationship for accurate image search

Jaehyeong Cho, Jae-Pil Heo, Taeyoung Kim, Bohyung Han, więcej

The Visual Computer > 2017 > 33 > 6-8 > 1049-1059

We present a rank-based voting technique utilizing inclusion relationship for high-quality image search. Since images can have multiple regions of interest, we extract representative object regions using a state-of-the-art region proposal method tailored for our search problem. We then extract CNN features locally from those representative regions and identify inclusion relationship between those...

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PCA Based Computation of Illumination-Invariant Space for Road Detection

Taeyoung Kim, Yu-Wing Tai, Sung-Eui Yoon

2017 IEEE Winter Conference on Applications of Computer Vision (WACV) > 632 - 640

2017 IEEE Winter Conference on Applications of Computer Vision (WACV)

Illumination changes such as shadows significantly affect the accuracy of various road detection methods, especially for vision-based approaches with an on-board monocular camera. To efficiently consider such illumination changes, we propose a PCA based technique, PCA-II, that finds the minimum projection space from an input RGB image, and then use the space as the illumination-invariant space for...

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Anytime RRBT for handling uncertainty and dynamic objects

Hyunchul Yang, Jongwoo Lim, Sung-eui Yoon

2016 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS) > 4786 - 4793

2016 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS)

We present an efficient anytime motion planner for mobile robots that considers both other dynamic obstacles and uncertainty caused by various sensors and low-level controllers. Our planning algorithm, which is an anytime extension of the Rapidly-exploring Random Belief Tree (RRBT), maintains the best possible path throughout the robot execution, and the generated path gets closer to the optimal one...

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Shortlist Selection with Residual-Aware Distance Estimator for K-Nearest Neighbor Search

Jae-Pil Heo, Zhe Lin, Xiaohui Shen, Jonathan Brandt, więcej

2016 IEEE Conference on Computer Vision and Pattern Recognition (CVPR) > 2009 - 2017

2016 IEEE Conference on Computer Vision and Pattern Recognition (CVPR)

In this paper, we introduce a novel shortlist computation algorithm for approximate, high-dimensional nearest neighbor search. Our method relies on a novel distance estimator: the residual-aware distance estimator, that accounts for the residual distances of data points to their re-spective quantized centroids, and uses it for accurate short-list computation. Furthermore, we perform the residual-aware...

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Super ray based updates for occupancy maps

Youngsun Kwon, Donghyuk Kim, Sung-eui Yoon

2016 IEEE International Conference on Robotics and Automation (ICRA) > 4267 - 4274

2016 IEEE International Conference on Robotics and Automation (ICRA)

We present a novel approach, Super Ray, for efficiently updating map representations such as grids and octrees with point clouds. In this paper, we define a super ray for points as a representative ray to them with an associated frustum. A super ray is constructed in a way that updating those points has the same set of cells accessed during the map update process. As a result, we can perform the update...

artykuł

Discriminative subgraphs for discovering family photos

Changmin Choi, YoonSeok Lee, Sung-Eui Yoon

Computational Visual Media > 2016 > 2 > 3 > 257-266

We propose to use discriminative subgraphs to discover family photos from group photos in an efficient and effective way. Group photos are represented as face graphs by identifying social contexts such as age, gender, and face position. The previous work utilized bag-of-word models and considered frequent subgraphs from all group photos as features for classification. This approach, however, produces...

artykuł

Spherical Hashing: Binary Code Embedding with Hyperspheres

Jae-Pil Heo, Youngwoon Lee, Junfeng He, Shih-Fu Chang, więcej

IEEE Transactions on Pattern Analysis and Machine Intelligence > 2015 > 37 > 11 > 2304 - 2316

Many binary code embedding schemes have been actively studied recently, since they can provide efficient similarity search, and compact data representations suitable for handling large scale image databases. Existing binary code embedding techniques encode high-dimensional data by using hyperplane-based hashing functions. In this paper we propose a novel hypersphere-based hashing function, spherical...

artykuł

Recursive Path Planning Using Reduced States for Car-Like Vehicles on Grid Maps

Sangyol Yoon, Sung-Eui Yoon, Unghui Lee, David Hyunchul Shim

IEEE Transactions on Intelligent Transportation Systems > 2015 > 16 > 5 > 2797 - 2813

We present a recursive path-planning method that efficiently generates a path by using reduced states of the search space and taking into account the kinematics, shape, and turning space of a car-like vehicle. Our method is based on a kinematics-aware node expansion method that checks for collisions based on the shape and turning space of a vehicle. We present two heuristics that simultaneously consider...

artykuł

Metro Transit‐Centric Visualization for City Tour Planning

Pio Claudio, Sung‐Eui Yoon

Computer Graphics Forum > 33 > 3 > 271 - 280

In general, city trip planning consists of two main steps: knowing Points‐Of‐Interest (POIs), and then planning a tour route from the current point to next preferred POIs. We mainly consider the metro for traveling around touristic cities as the main means of transportation. In this context, existing tools lack a capability to effectively visualize POIs on the metro map for trip planning. To bridge...

rozdział

Distance Encoded Product Quantization

Jae-Pil Heo, Zhe Lin, Sung-Eui Yoon

2014 IEEE Conference on Computer Vision and Pattern Recognition > 2139 - 2146

2014 IEEE Conference on Computer Vision and Pattern Recognition (CVPR)

Many binary code embedding techniques have been proposed for large-scale approximate nearest neighbor search in computer vision. Recently, product quantization that encodes the cluster index in each subspace has been shown to provide impressive accuracy for nearest neighbor search. In this paper, we explore a simple question: is it best to use all the bit budget for encoding a cluster index in each...

rozdział

Cloud RRT^∗: Sampling Cloud based RRT^∗

Donghyuk Kim, Junghwan Lee, Sung-eui Yoon

2014 IEEE International Conference on Robotics and Automation (ICRA) > 2519 - 2526

2014 IEEE International Conference on Robotics and Automation (ICRA)

We present a novel biased sampling technique, Cloud RRT^∗, for efficiently computing high-quality collision-free paths, while maintaining the asymptotic convergence to the optimal solution. Our method uses sampling cloud for allocating samples on promising regions. Our sampling cloud consists of a set of spheres containing a portion of the C-space. In particular, each sphere projects to a collision-free...

rozdział

PROT: Productive regions oriented task space path planning for hyper-redundant manipulators

Junghwan Lee, Sung-eui Yoon

2014 IEEE International Conference on Robotics and Automation (ICRA) > 6491 - 6498

2014 IEEE International Conference on Robotics and Automation (ICRA)

In this paper we propose a novel efficient sampling bias technique to improve the performance of a task space trajectory planner for hyper-redundant manipulators. We defines productive regions in the task space as a set of states that can lead effectively to a goal state. We first compute a maximum reachable area (MRA) where a robot can reach from the node by an employed local planner for a node in...

artykuł

T-ReX: Interactive Global Illumination of Massive Models on Heterogeneous Computing Resources

Tae-Joon Kim, Xin Sun, Sung-Eui Yoon

IEEE Transactions on Visualization and Computer Graphics > 2014 > 20 > 3 > 481 - 494

We propose several interactive global illumination techniques for a diverse set of massive models. We integrate these techniques within a progressive rendering framework that aims to achieve both a high rendering throughput and an interactive responsiveness. To achieve a high rendering throughput, we utilize heterogeneous computing resources consisting of CPU and GPU. To reduce expensive data transmission...

artykuł

A Selective Retraction-Based RRT Planner for Various Environments

Junghwan Lee, OSung Kwon, Liangjun Zhang, Sung-Eui Yoon

IEEE Transactions on Robotics > 2014 > 30 > 4 > 1002 - 1011

We present a novel randomized path planner for rigid robots to efficiently handle various environments that have different characteristics. We first present a bridge line test that can identify narrow passage regions and then selectively performs an optimization-based retraction only at those regions. We also propose a noncolliding line test, which is a dual operator to the bridge line test, as a...

artykuł

Guest Editors’ Introduction: Special Issue on the ACM SIGGRAPH Symposium on Interactive 3D Graphics and Games 2013

Gopi Meenakshisundaram, Sung-Eui Yoon

IEEE Transactions on Visualization and Computer Graphics > 2014 > 20 > 7 > 955 - 956

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Wyniki wyszukiwania dla: Sung-Eui Yoon

Inexpensive indoor acoustic material estimation for realistic sound propagation

Gradient Outlier Removal for Gradient‐Domain Path Tracing

Feature Generation for Adaptive Gradient‐Domain Path Tracing

Data-driven kinodynamic RRT

Physically inspired, interactive lightning generation

Rank-based voting with inclusion relationship for accurate image search

PCA Based Computation of Illumination-Invariant Space for Road Detection

Anytime RRBT for handling uncertainty and dynamic objects

Shortlist Selection with Residual-Aware Distance Estimator for K-Nearest Neighbor Search

Super ray based updates for occupancy maps

Discriminative subgraphs for discovering family photos

Spherical Hashing: Binary Code Embedding with Hyperspheres

Recursive Path Planning Using Reduced States for Car-Like Vehicles on Grid Maps

Metro Transit‐Centric Visualization for City Tour Planning

Distance Encoded Product Quantization

Cloud RRT^∗: Sampling Cloud based RRT^∗

PROT: Productive regions oriented task space path planning for hyper-redundant manipulators

T-ReX: Interactive Global Illumination of Massive Models on Heterogeneous Computing Resources

A Selective Retraction-Based RRT Planner for Various Environments

Guest Editors’ Introduction: Special Issue on the ACM SIGGRAPH Symposium on Interactive 3D Graphics and Games 2013

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