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- 저자 : Yousun Park(박유선) (검색결과 7 건)
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Fast distortion measurement method for MPEG point cloud compression
Yousun Park(박유선),Euee S. Jang(장의선) 대한전자공학회 2018 대한전자공학회 학술대회 Vol.2018 No.11
In this paper, we propose fast distortion quality measurement to improve efficient compression of massive point cloud data by introducing distortion search metric. In MPEG, point cloud compression standard is being actively standardized. As a new medium, point clouds pose new challenges in compression. One of them is to accurately assess the distortion of the encoded point clouds. If a point cloud is compressed lossy, there is no guarantee in mapping exact points between the original and encoded point clouds. For this reason, a tool called PC_ERROR [1] has been adopted for PCC. The PC_ERROR tool nicely solves the distortion measurement in an accurate manner; yet, it suffers from substantial computational complexity. To deal with this problem, we propose a fast distortion computing method to measure the Point Cloud Compression sequences. On top of PC_ERROR we designed new searching algorithm. Throughout the experimental results, we showed that the proposed method outperforms the PC_ERROR tool by 75 percent in execution time while preserving the accuracy in distortion measure.
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디지털 아카이브 구축 방안 연구 : 장성군 홍길동 문화 콘텐츠를 중심으로
박윤성(Park Yoonsung),박유선(Park Yousun) 한국디지털디자인학회 2010 디지털디자인학연구 Vol.10 No.1
급격한 사회 변화를 주도하는 정보기술(IT: Information Technology)환경에서 전통적인 문화와 첨단 정보통신을 접목한 디지털 문화구축을 위해서 새로운 틀과 내용들이 요구되고 있다. 이에 디지털 기술에 의해 가공된 멀티미디어 문화 콘텐츠인 디지털 아카이브는 글로벌 경쟁력의 확보가 요구되는 현시점에서 통합적 개념의 필수적인 요소라 할 수 있다. 그러므로 본 연구는 사회구조적인 측면에서 미래 지식기반의 하나인 디지털 아카이브의 중요성을 분석하고 그에 따른 지역정보문화산업의 일환인 장성군 홍길동 문화 콘텐츠 디지털 아카이브 구축에 대한 사례 분석을 통해 디지털 아카이브 활용방안 가능성과 그 기대효과를 제시한다. 따라서 본 논문에서는 디지털 아카이브 구축 방안의 이론적 토대와 그 구체적인 사례를 제공함으로 인해 디지털 아카이브가 갖는 중요한 역할의 확대된 의미에 대해 재조명해 본다. 또한 문화자원으로써 정보와 지식을 수집하고 보관·전시하는 것을 넘어 재가공하고 문화 교류의 새로운 장으로 활용함으로 정보문화 생산과 소비의 확산 그에 따른 고용 창출과 민족적 자긍심의 함양 등 선진적 정보문화 중심국가의 기반을 다지는 확대된 가치와 다른 차원의 개념들을 밝히고자 한다. In order to build a new border for digital cultural contents it is required that the rapidly changing world lead information technology environments and traditional culture is combined with cutting-edge information and communications. Digital technology can be integrated as an essential element of this concept along with a digital archive of culture to secure the current global competitiveness. Therefore the social structure in terms of research-based knowledge of the future is one of analyzing the importance of digital archives. According to part of the local cultural project 'Hong Gil-dong' in Jangsung on building a digital archive of cultural contents through the digital archive use case analysis and the expected effects of possible measures is presented. Therefore this study measures the theoretical foundation for building a digital archive and the specific arrangement by crossing real world data with digital archives is important to recognize the extended meaning. Culture as information and knowledge resources to collect and to exhibit over custody remanufacturing and cultural exchanges take advantage of the new chapters of the spread of information cultural production and consumption This results in job creation and fostering national pride while the country's advanced cultural information center cement the foundation of the concept of extended value as well as give a different dimension.
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압축 비트스트림 기반의 향상된 동영상 움직임 검출 방법
이민구(Min-Ku Lee),박유선(Yousun Park),장의선(Euee Seon Jang) 대한전자공학회 2018 대한전자공학회 학술대회 Vol.2018 No.11
In this paper, we propose an improved motion detection method from a compressed bitstream without decoding. In general, it is believed that a compressed video data is statistically uniform in that no meaningful data can be assessed solely from the bitstream without decoding. In this paper, we tackled this problem to classify an input video bitstream with or without motion activity. We extended our previous detection method to come up with higher accuracy in classification. Experimental results show that the proposed method improves the motion detection accuracy of the previous method.
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Context-based compression of point cloud octree structure
Haiyan Xu(허해연),Seung-ho Lee(이승호),Yousun Park(박유선),Euee S. Jang(장의선) 대한전자공학회 2017 대한전자공학회 학술대회 Vol.2017 No.6
In this paper, we propose a context-based efficient octree structure compression method to efficiently compress the geometry data of point cloud. Recently, the compression of (static and dynamic) point clouds is gaining more attention as new media applications include point clouds as an important asset. In MPEG, an exploration activity to exploit the feasibility of defining a new standard for point cloud compression has been active for several years. In this paper, we proposed an extended method from MPEG Point Cloud Compression (PCC) that exploits the octree structure (e.g. leaf/non-leaf nodes) to further increase the compression efficiency compared to the existing MPEG method. Through the experiments, the proposed method further reduced the compression ratio up to 7% on average.
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