Sanghwa Lee

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Sanghwa Lee (11)
Jong-il Park (4)
Nam-ik Cho (4)
Jong-il Park (2)
Junyeong Choi (2)
SaeWoon Ryu (2)
Seongjong Ha (2)
Dongwook Ko (1)
Eunjoo Rhee (1)
Hanhoon Park (1)
Hyung-il Koo (1)
Insung Hwang (1)
Jae-sung Park (1)
Linlin Sang (1)
Sang Ahn (1)
Seiheui Han (1)
Seungjun Mok (1)
Siddharth Sharma (1)
Sumit Srivastava (1)
Yonggyu Park (1)

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IEEE Transactions on Consumer Electronics (3)
Image and Vision Computing (1)
Image Communication (1)
Multimedia Tools and Applications (1)

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ACIVS'11: Proceedings of the 13th international conference on Advanced concepts for intelligent vision systems (1)
ICIAP'05: Proceedings of the 13th international conference on Image Analysis and Processing (1)
ICIP'09: Proceedings of the 16th IEEE international conference on Image processing (1)
ISVC'11: Proceedings of the 7th international conference on Advances in visual computing - Volume Part II (1)
VRCAI '11: Proceedings of the 10th International Conference on Virtual Reality Continuum and Its Applications in Industry (1)

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IEEE Press (4)
Springer-Verlag (3)
Association for Computing Machinery (1)
Butterworth-Heinemann (1)
Elsevier Science Inc. (1)
Kluwer Academic Publishers (1)

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article
Saliency detection based on seed propagation in a multilayer graph
- Insung Hwang
  INMC, Department of Electrical and Computer Engineering, Seoul National University, Seoul, South Korea 151-742
  ,
- Sang Hwa Lee
  INMC, Department of Electrical and Computer Engineering, Seoul National University, Seoul, South Korea 151-742
  ,
- Jae Sung Park
  INMC, Department of Electrical and Computer Engineering, Seoul National University, Seoul, South Korea 151-742 and Visual Display Division, SAMSUNG Electronics Co. Ltd., Suwon, South Korea 443-742
  ,
- Nam Ik Cho
  INMC, Department of Electrical and Computer Engineering, Seoul National University, Seoul, South Korea 151-742
Multimedia Tools and Applications, Volume 76, Issue 2•January 2017, pp 2111-2129 • https://doi.org/10.1007/s11042-015-3171-7

This paper presents a saliency detection algorithm based on the seed propagation in graph representation of image. First, the image is divided into over-segmented regions and a graph of the connected regions (nodes) with color similarity (edge weight) ...
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Discrimination and description of repetitive patterns for enhancing the performance of feature-based recognition
Image and Vision Computing, Volume 30, Issue 11•November, 2012, pp 817-828 • https://doi.org/10.1016/j.imavis.2012.06.006

Conventional object retrieval or recognition methods based on feature matching sometimes fail when an object contains repetitive patterns, because features from repetitive patterns are too similar to each other. Specifically, when there arise many ...
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An interface between users and virtual objects using two hands
- Eun Joo Rhee
  Hanyang University, Seoul, Korea
  ,
- Seiheui Han
  Hanyang University, Seoul, Korea
  ,
- Junyeong Choi
  Hanyang University, Seoul, Korea
  ,
- Jong-Il Park
  Hanyang University, Seoul, Korea
  ,
- Sang Hwa Lee
  Seoul National University, Seoul, Korea
VRCAI '11: Proceedings of the 10th International Conference on Virtual Reality Continuum and Its Applications in Industry•December 2011, pp 441-442• https://doi.org/10.1145/2087756.2087840

This paper presents a novel hand-based interface that provides natural interactions with virtual objects augmented on a user's palm. In the interface, virtual objects are easily selected by drawing predefined patterns on a palm of one hand with a finger ...
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SERP: SURF enhancer for repeated pattern
- Seung Jun Mok
  Dept. of Electronics and Computer Eng., Hanyang University
  ,
- Kyungboo Jung
  Dept. of Electronics and Computer Eng., Hanyang University
  ,
- Dong Wook Ko
  Dept. of Intelligent Robot Eng., Hanyang University
  ,
- Sang Hwa Lee
  Dept. of Electrical Eng., BK21 Information Technology, Seoul National University
  ,
- Byung-Uk Choi
  Division of Computer Science & Eng., Hanyang University
ISVC'11: Proceedings of the 7th international conference on Advances in visual computing - Volume Part II•September 2011, pp 578-587

This paper proposes an object-matching method for repetitive patterns. Mismatching problems occur when descriptor-based features like SURF or SIFT are applied to repeated image patterns due to the use of the usual distance-ratio test. To overcome this, ...
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An intelligent video security system using object tracking and shape recognition
- Sang Hwa Lee
  Dept. of Electrical Eng., Seoul National University, Seoul, S. Korea
  ,
- Siddharth Sharma
  Dept. of Electrical Eng., Seoul National University, Seoul, S. Korea
  ,
- Linlin Sang
  Dept. of Computer Eng., Hanyang University, Seoul, S. Korea
  ,
- Jong-Il Park
  Dept. of Computer Eng., Hanyang University, Seoul, S. Korea
  ,
- Yong Gyu Park
  Laice Electronics Co. Ltd., Seoul, S. Korea
ACIVS'11: Proceedings of the 13th international conference on Advanced concepts for intelligent vision systems•August 2011, pp 471-482

This paper deals with an intelligent video surveillance system using object tracking and recognition techniques. The proposed system integrates the object extraction, human recognition, face detection, object tracking, and camera control. First, the ...
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Stereo matching using hierarchical belief propagation along ambiguity gradient
- Sumit Srivastava
  School of Electrical Engineering, INMC, Seoul National University, Seoul, Korea
  ,
- Seong Jong Ha
  School of Electrical Engineering, INMC, Seoul National University, Seoul, Korea
  ,
- Sang Hwa Lee
  School of Electrical Engineering, INMC, Seoul National University, Seoul, Korea
  ,
- Nam Ik Cho
  School of Electrical Engineering, INMC, Seoul National University, Seoul, Korea
ICIP'09: Proceedings of the 16th IEEE international conference on Image processing•November 2009, pp 2061-2064

This paper proposes a stereo matching algorithm based on hierarchical belief propagation and occlusion handling. We define a new order for message passing in belief propagation instead of the scanline approach. The primary assumption is that a pixel ...
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Real-time 3D surface modeling for image based relighting
- Sae-Woon Ryu
  Hanyang University
  ,
- Sang Hwa Lee,
- Jong-Il Park
IEEE Transactions on Consumer Electronics, Volume 55, Issue 4•November 2009, pp 2431-2435 • https://doi.org/10.1109/TCE.2009.5373820

This paper proposes to obtain 3D modeling of object surface and to create a relit image in real-time. The proposed algorithm uses a single camera and synchronized stereo lights to capture the light field images by turning on and off the lights ...
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Tangible video teleconference system using real-time image-based relighting
- Sae-woon Ryu
  Dept. of Electr. & Comput. Eng., Hanyang Univ., Seoul, South Korea
  ,
- Sang Hwa Lee,
- Sang Ahn,
- Jong-il Park
IEEE Transactions on Consumer Electronics, Volume 55, Issue 3•August 2009, pp 1162-1168 • https://doi.org/10.1109/TCE.2009.5277971

This paper deals with a real-time image based relighting system for tangible video teleconference. The proposed image based relighting system renders the extracted human object using the virtual environmental images. The proposed system can homogenize ...
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Interactive e-learning system using pattern recognition and augmented reality
- Sang Hwa Lee
  Dept. of Electr. Eng. & Comput. Sci., Seoul Nat. Univ., Seoul, South Korea
  ,
- Junyeong Choi,
- Jong-il Park
IEEE Transactions on Consumer Electronics, Volume 55, Issue 2•May 2009, pp 883-890 • https://doi.org/10.1109/TCE.2009.5174470

This paper proposes an interactive e-learning system using pattern recognition and augmented reality. The goal of proposed system is to provide students with realistic audio-visual contents when they are leaning. The proposed e-learning system consists ...
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article
Bayesian object extraction from uncalibrated image pairs
- Hyung Il Koo
  School of Electrical Engineering and Computer Sciences, Institute of New Media and Communications, Seoul National University, Seoul, Republic of Korea
  ,
- Sang Hwa Lee
  School of Electrical Engineering and Computer Sciences, Institute of New Media and Communications, Seoul National University, Seoul, Republic of Korea
  ,
- Nam Ik Cho
  School of Electrical Engineering and Computer Sciences, Institute of New Media and Communications, Seoul National University, Seoul, Republic of Korea
Image Communication, Volume 22, Issue 10•November, 2007, pp 866-876 • https://doi.org/10.1016/j.image.2007.07.003

This paper proposes a region-based algorithm for the extraction of foreground objects in uncalibrated images or video sequences. At the initialization step, a pair of images are overly segmented based on color and texture. Then, several dominant ...
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Image-Based relighting of moving objects with specular reflection
- Hanhoon Park
  Division of Electrical and Computer Engineering, Hanyang University, Seoul, Korea
  ,
- Jong-Il Park
  Division of Electrical and Computer Engineering, Hanyang University, Seoul, Korea
  ,
- Sang Hwa Lee
  Department of Electrical Engineering, Seoul National University, Seoul, Korea
ICIAP'05: Proceedings of the 13th international conference on Image Analysis and Processing•September 2005, pp 519-526• https://doi.org/10.1007/11553595_64

In the fields of Augmented Reality (AR) and Virtual Reality (VR), inserting an object into a scene (real or virtual) requires proper matching of their lighting conditions. If not, the resulting image may look unnatural. In particular, it is important to ...
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Please see the following 2007 Turing Award winners' profiles as examples:
History: Disambiguation of author names is of course required for precise identification of all the works, and only those works, by a unique individual. Of equal importance to ACM, author name normalization is also one critical prerequisite to building accurate citation and download statistics. For the past several years, ACM has worked to normalize author names, expand reference capture, and gather detailed usage statistics, all intended to provide the community with a robust set of publication metrics. The Author Profile Pages reveal the first result of these efforts.
Normalization: ACM uses normalization algorithms to weigh several types of evidence for merging and splitting names.
These include:
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The more conservative the merging algorithms, the more bits of evidence are required before a merge is made, resulting in greater precision but lower recall of works for a given Author Profile. Many bibliographic records have only author initials. Many names lack affiliations. With very common family names, typical in Asia, more liberal algorithms result in mistaken merges.

Automatic normalization of author names is not exact. Hence it is clear that manual intervention based on human knowledge is required to perfect algorithmic results. ACM is meeting this challenge, continuing to work to improve the automated merges by tweaking the weighting of the evidence in light of experience.
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Downloads from these sites are captured in official ACM statistics, improving the accuracy of usage and impact measurements. Consistently linking to definitive version of ACM articles should reduce user confusion over article versioning.

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To access ACM Author-Izer, authors need to establish a free ACM web account. Should authors change institutions or sites, they can utilize the new ACM service to disable old links and re-authorize new links for free downloads from a different site.

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Depending on your previous activities within the ACM DL, you may need to take up to three steps to use ACM Author-Izer.

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Go to the ACM DL http://dl.acm.org/ and click SIGN UP. Once your account is established, proceed to next step.

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Sign in to your ACM web account and go to your Author Profile page. Click "Add personal information" and add photograph, homepage address, etc. Click ADD AUTHOR INFORMATION to submit change. Once you receive email notification that your changes were accepted, you may utilize ACM Author-izer.

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Sign in to your ACM web account, go to your Author Profile page in the Digital Library, look for the ACM Author-izer link below each ACM published article, and begin the authorization process. If you have published many ACM articles, you may find a batch Authorization process useful. It is labeled: "Export as: ACM Author-Izer Service"

ACM Author-Izer also provides code snippets for authors to display download and citation statistics for each “authorized” article on their personal pages. Downloads from these pages are captured in official ACM statistics, improving the accuracy of usage and impact measurements. Consistently linking to the definitive version of ACM articles should reduce user confusion over article versioning.

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Q. What is ACM Author-Izer?
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Authors who do not use ACM Author-Izer links will not have downloads from their local, personal bibliographies counted. They do, however, retain the existing right to post author-prepared preprint versions on their home pages or institutional repositories with DOI pointers to the definitive version permanently maintained in the ACM Digital Library.

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Sanghwa Lee

Sanghwa Lee

Applied Filters

People

Colleagues

Publication

Journal/Magazine Names

Proceedings/Book Names

All Publications

Content Type

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Results

Saliency detection based on seed propagation in a multilayer graph

Discrimination and description of repetitive patterns for enhancing the performance of feature-based recognition

An interface between users and virtual objects using two hands

SERP: SURF enhancer for repeated pattern

An intelligent video security system using object tracking and shape recognition

Stereo matching using hierarchical belief propagation along ambiguity gradient

Real-time 3D surface modeling for image based relighting

Tangible video teleconference system using real-time image-based relighting

Interactive e-learning system using pattern recognition and augmented reality

Bayesian object extraction from uncalibrated image pairs

Image-Based relighting of moving objects with specular reflection