• Proceedings of the Korea Contents Association Conference
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• 2010.05a
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• pp.350-352
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• 2010

본 논문은 3D 가상공간에서 사용자와의 상호작용적인 사용자 인터페이스를 기반으로 실내 인테리어 시뮬레이션 시스템의 구현을 목적으로 한다. 시스템에서 시각적으로 보여줄 실내 모델링을 위해서는 구글 스케치업을 사용하였으며, 사용자 인터페이스의 실행을 위해서는 스크립트를 사용하였다. 본 논문에서 제안하는 시스템은 기존 시스템들의 기본적인 시뮬레이션 기능보다 계층적인 사용자 인터페이스를 가시적이고 현실적으로 추가하여 보다 개선된 시뮬레이션이 될 수 있도록 하였다.

• Journal of Korea Multimedia Society
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• v.15 no.3
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• pp.388-397
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• 2012

Recently, one of the received attraction fields in web based service is 'Human Relationship Service' that is called SNS. This relationship map service is able to deliver information to user more easily and visually because it is intuitive data that is linked with offline real world. While past map service put physical real information in the map, present map service is evolving into new communicative platform that expresses social relationship beyond simple search platform that shows real world. In this paper, we propose smart social grid system using sketch map that is based on online map service structure. This system has features such as standardized interface provision for various SNS, use to governance hub tool in case of establishing a personal network through expanded social grid, a role of bridge to mashup software linked with other SNS, user environment construction that reproduces social grid data, and the faster service setup by improved search technology.

• The KIPS Transactions:PartD
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• v.13D no.1 s.104
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• pp.29-36
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• 2006

In this paper, we present a leaf image retrieval system that represents and retrieves leaf images based on their shape. For more effective representation of leaf images, we improved an existing MPP algorithm. Also, in order to reduce the response time, we proposed a new dynamic matching algorithm at basically revises the Nearest Neighbor search. The system provides users with an interface for uploading query images or tools to generate queries based on shape features and retrieves images based on their similarity. For convenience, users are allowed to easily query images by sketching leaf shape or leaf arrangement on the web. In the experiment, we constructed an image database of Korean native plants and measured the system performance by counting the number of similar images retrieved for queries.

• Korean Journal of Computational Design and Engineering
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• v.13 no.4
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• pp.255-264
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• 2008

Research that reconstructs a 3D model from a freehand 2D sketch has gained attention since 1990s, when data integration in the CAD/CAPP/CAM/CNC chain was an important issue. However, 2D sketches in the conceptual design phase have not been integrated with the downstream CAD/CAPP/CAM/CNC chain. In this paper, we present a method to interface a freehand sketch modeling to commercial CAD systems by mapping a sketch modeling history to the macro parametric history. We use an extended ISO10303-112 standard to represent the modeling history in a gestural modeling system and translate sketch files to neutral macro files. Macro parametric translators are used to translate netural macro files to commercial CAD files.

• Journal of the Korea Computer Graphics Society
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• v.11 no.3
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• pp.41-48
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• 2005

시청자의 개입에 따라 내용이 변하는 영상은 영상산업 및 컴퓨터 그래픽스 분야에서 대중들의 새로운 흥미를 불러일으킨다. 그러나, 그러한 영상을 생성하는 시스템을 만드는 일은 제한된 개수의 영상으로 다양하면서 온전한 영상의 변화를 만들어야 하고, 사용자에게 그 변화를 조정하는 권한을 주어야 하기 때문에 어려운 일이다. 본 논문에서는 이 문제를 해결하는 한 방법으로 개별적인 실사 촬영물을 이용하여 인터랙티브 드라마를 생성하는 시스템을 제안한다. 이 시스템은 개별적인 영상 알갱이들을 부드럽게 연결하여, 다양한 줄거리와 완결된 구조를 갖춘 드라마를 생성한다. 또한, 사용자는 생성된 드라마의 내용, 길이, 장르, 등장인물을 원하는 대로 바꿀 수 있다. 이러한 시스템을 만들기 위하여 씬(scene)을 새로운 방법으로 모델링 하였고, 씬들을 적절히 선택하여 연결하기 위한 방법으로 씬 그래프(scene graph)를 제안한다. 최종 영상과 사용자와의 상호 작용을 위해서는 비젼, 모션, 그리고 스케치 기반 인터페이스를 제시한다. 끝으로 설문 조사를 통해 이 시스템의 유용성을 평가한다.

• Journal of KIISE:Software and Applications
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• v.33 no.9
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• pp.741-750
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• 2006

In this paper, we propose a method for reconstructing a 3D object (or a set of objects) from a 2D drawing provided by a designer. The input 2D drawing consists of a set of contours that may partially overlap each other or be self-overlapping. Accordingly, the resulting 3D object(s) may occlude each other or be self-occluding. The proposed method is composed of three major steps: 2D contour analysis, 3D skeleton computation, and 3D object construction. Our main contribution is to compute the 3D skeleton from the self-intersecting 2D counterpart. We formulate the 3D skeleton construction problem as a sequence of optimization problems, to shape the skeleton and place it in the 3D space while satisfying C1-continuity and intersection-free conditions. Our method is mainly for a silhouette-based sketching interface for the design of 3D objects including self-intersecting objects.

• The KIPS Transactions:PartB
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• v.15B no.3
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• pp.219-228
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• 2008

For real-time social networking service, mobile interaction in a usable-unified-ubiquitous (U3) web service was studied. Both as a convenient mobile HCI for real-time social networks and as indexing keys to metadata information in ubiquitous web service, the multi-lingual single-character domain names (e.g. 김.net, 이.net, 가.net, ㄱ.net, ㄴ.net, ㅎ.net, ㅏ.net, ㅔ.net, ㄱ.com, ㅎ.com) are convenient mobile interfaces when searching for social information and registering information. We introduce the sketched design goals and experience of mobile interaction in Korea, Japan and China, with the implementation of real-time social networking service as an example of U3 Web service. We also introduce the possibility of extending the application to the metadata directory service in IP-USN (IP-based Ubiquitous Sensor Network) for a unified information management in the service of social networking and sensor networking.

• Journal of KIISE
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• v.43 no.5
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• pp.516-523
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• 2016

For old-age makeups, makeup artists first make a mold cast of an actor's face using plaster and then sculpt wrinkles in clay on the plaster mold. After finishing the clay sculpture, its negative plaster mold is fabricated and silicone skin patches are finally made for application to the actor's face. This process takes a few days and is tedious for actors and makeup artists. With recent advances in 3D printing and scanning technology, it is becoming easier to scan and fabricate 3D faces. This paper presents a new pipeline composed of facial scanning, interactive wrinkle modeling, and mold printing stages to easily and efficiently fabricate silicone masks for old-age makeups without the use of plaster and clay. An intuitive sketch interface based on a normal map is proposed for the creation of wrinkles in real time, even with a high-resolution face model. Then the geometry of the final wrinkles is reconstructed using a depth map and the negative mold of the wrinkled face is printed. We also show that the presented pipeline can fabricate a silicone mask more conveniently than the traditional one that consists of pouring silicone into the prepared negative mold and then overlapping the mold with the original positive one.