• Proceedings of the Korea Multimedia Society Conference
• /
• 2000.04a
• /
• pp.474-477
• /
• 2000

최근 3D 애니메이션 , 영화 특수효과 그리고 게임제작시 모션 캡처 시스템(Motion Capture System)을 통하여 실제 인간의 동작 및 표정을 수치적으로 측정해내어 이를 실제 애니메이션에 직접 사용함으로써 막대한 작업시간 및 인력 드리고 자본을 획기적으로 줄이고 있다. 그러나 기존의 모션 캡처 시스템은 고속 카메라를 이용함으로써 가격이 고가이고 움직임 추적에서도 여러 가지 문제점을 가지고 있다. 본 논문에서는 일반 저가의 카메라와 신경회로망 및 영상처리를 이용하여 얼굴 애니메이션용 모션 캡처 시스템에 적용할 수 있는 경제적이고 효율적인 얼굴 움직임 추적 기법을 제안한다.

• Proceedings of the Korean Society of Computer Information Conference
• /
• 2024.01a
• /
• pp.71-72
• /
• 2024

본 논문에서는 Adobe Mixamo, 에픽게임즈 마켓플레이스, 유니티 에셋스토어 등에서 제공되는 모션캡쳐 FBX 데이터를 3ds Max 바이패드 애니메이션 시스템에 리타게팅 적용할 때 발생하는 문제점과 해결 방법을 살펴본다. 모션캡쳐 FBX를 바이패드에 리타게팅 하는 과정은 다양한 측면에서 이슈가 발생하는데 본 논문에서는 종아리와 하박 관절의 X축 회전 오차를 중심으로 살펴본다.

• The Journal of the Institute of Internet, Broadcasting and Communication
• /
• v.8 no.6
• /
• pp.111-117
• /
• 2008

In this paper, we describes the boxing motion recognition which is used in the part of games, animation. To recognize the boxing motion, we have used two algorithms, one is principle component analysis, the other is dynamic time warping algorithm. PCA is the simplest of the true eigenvector-based multivariate analyses and often used to reduce multidimensional data sets to lower dimensions for analysis. DTW is an algorithm for measuring similarity between two sequences which may vary in time or speed. We introduce and compare PCA and DTW algorithms respectively. We implemented the recognition of boxing motion on the motion capture system which is developed in out research, and depict the system also. The motion graph will be created by boxing motion data which is acquired from motion capture system, and will be normalized in a process. The result has implemented in the motion recognition system with five actors, and showed the performance of the recognition.

• The Journal of the Korea institute of electronic communication sciences
• /
• v.8 no.1
• /
• pp.159-164
• /
• 2013

Recently the solution integrated of vision and motion controller which are important element in automatiomn system has been many developed. However typically such a solutions has a many case that integrated vision processing and motion control into network or organized two chip solution on one module. We implement one chip solution integrated into vision and motion controller using Zynq-7000 that is developed recently as extended processing platform. We also apply EtherCAT to motion control that is industrial Ethernet protocol which have compatibility for open standardization Ethernet in order to control of motion because EtherCAT has a secure to realtime control and can treat massive data.

• Journal of KIISE:Software and Applications
• /
• v.31 no.11
• /
• pp.1474-1482
• /
• 2004

In this paper, we propose an approach for extracting and filtering block motion vectors using an adaptive weight function. We first extract motion vectors from a sequence of images by using size-varibale block matching and then process them by adaptive robust estimation to filter out outliers (motion vectors out of concern). The proposed adaptive robust estimation defines a continuous sigmoid weight function. It then adaptively tunes the sigmoid function to its hard-limit as the residual errors between the model and input data are decreased, so that we can effectively separate non-outliers (motion vectors of concern) from outliers with the finally tuned hard-limit of the weight function. The experimental results show that the suggested approach is very effective in filtering block motion vectors.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2011.05a
• /
• pp.365-368
• /
• 2011

Image is the one of the media that satisfy the wants of people. A motion graphics is a new media stimulating not only a visual but also a hearing of people, and has gained attention by an important emotion communication way that communicates the sound and the visual messages to the audience. In this paper we study on what feelings the motion graphics used on the stage background communicates to the audience, and what its effects and efficiencies are. Because it is not generalized to apply the motion graphics to the stage background, the range of the study can't help being limited. However, recently during two or three years, the use of the motion graphics is increasing more and more, and we expect that its utilization is more expanded.

• The Journal of the Korea Contents Association
• /
• v.10 no.3
• /
• pp.1-9
• /
• 2010

In this paper, we propose a new method of improving accuracy of motion estimation in mobile environments, compared with Rosten's algorithm. The present method selects corners as feature points. The Rosten's algorithm uses simple addition and subtraction to detect the corners. Although it has the advantage of faster processing speed, Rosten's algorithm has a drawback of low performance in motion estimation. We use the NCC(Normalized Cross Correlation) coefficients to match the corners, and remove in two steps the outliers of inaccurate matching corners. We compare the proposed algorithm with Rosten's algorithm by applying both to the real images. We find that the proposed method shows better performance than Rosten's algorithm in motion estimation. In addition, we implement the present method on mobile devices and confirm that it works in mobile environments in real time.

• Proceedings of the Korea Society for Simulation Conference
• /
• 2002.05a
• /
• pp.109-114
• /
• 2002

현재 게임시장에서는 사용자가 직접 게임을 체험하는 체감형 게임기가 활발히 개발되고 있다. 대다수의 제품들은 운동을 재현하기 위하여 6개의 축으로 이루어진 Stewart 형의 모션 플랫폼을 사용하고 있다. 본 연구개발에서 시도되고 있는 게임기는 모션이 가미된 콘솔형 아케이드 시뮬레이션 게임기에 해당되는데, 인간의 감성인자중 운동감성에 바탕을 둔 운동 재현을 고려하여 워시아웃(Washout) 알고리즘을 적용하였고, 일반적으로 6개의 축으로 구현하는 운동 자유도를 짐발(Gimbal)형으로 재현하고자 하였다. 또한 실시간 스케줄러와 H/W 입출력 및 통신 드라이버에 대한 개발을 수행하였으며, 게임용 실시간 시뮬레이션에 적합한 정확도와 실시간성을 유지하도록 롤러코스터 상에서 이루어지는 차량운동이 모델링 되었다. 특히, 연구사례를 찾기 어려운 짐발형 운동판에 대한 워시아웃 필터를 시뮬레이터 탑승자의 감성공학적 특성을 반영할 수 있도록 설계하였다.

• Journal of the HCI Society of Korea
• /
• v.9 no.1
• /
• pp.11-21
• /
• 2014

We present an experimental framework to analyze the physical reactions and causal factors of Visually Induced Motion Sickness (VIMS) using electroencephalography (EEG) signals and vital signs. We studied eleven subjects who are voluntarily participated in the experiments and conducted online and offline surveys. In order to simulate videos including global motions that could cause the motion sickness, we extracted global motions by optical flow estimation method from hand-held captured video recordings containing intense motions. Then, we applied the extracted global motions to our test videos with action movies and texts. Each genre of video includes three levels of different motions depending on its intensity. EEG signal and vital sign that were measured by a portable electrocorticography device and an electronic monometer in real time while the subjects watch the videos including ones with the extracted motions. We perform an analysis of the EEG signals using Distance Map(DM) calculated by correlation among each channel of brain signal. Analysis using the vital signs and the survey results is also performed to obtain relationship between the VIMS and causal factors. As a result, we clustered subjects into three groups based on the analysis of the physical reaction using the DM and the correlation between vital sign and survey results, which shows high relationships between the VIMS and the intensity of motions.

• Proceedings of the Korean Information Science Society Conference
• /
• 2011.06a
• /
• pp.535-538
• /
• 2011

최근 모바일 기기가 활성화되면서 자바스크립트의 성능 향상이 이슈가 되고 있다. 적시 컴파일러를 탑재한 자바스크립트 엔진들이 등장하면서 이러한 요구를 충족하고 있다. 대표적 웹 브라우징 엔진인 WebKit의 자바스크립트 엔진인 SquirrelFish Extreme(SFX)는 콘텍스트 쓰레딩 방식의 적시 컴파일러를 사용하고 있다. 하지만 모바일 환경에서의 성능은 여전히 문제가 된다. 모바일 환경에서 많이 사용되는 ARM CPU를 위한 SFX의 적시 컴파일러는 가상 레지스터를 머신 코드에서 사용하기 위해 많은 수의 메모리 로드와 스토어를 사용하고 있다. 또한 ARM 아키텍처가 제공하는 레지스터를 제대로 사용하지 못하고 사용되지 않는 레지스터가 존재하고 있다. 사용되지 않는 레지스터를 활용하여 메모리 로드와 스토어를 줄이는 레지스터 프로모션을 적용하였다. 루프에서 머신 코드로 수행되는 바이트 코드를 중심으로 가상레지스터를 실제 머신 레지스터로 할당하여 메모리 로드와 스토어를 줄이고 일부 벤치마크에서 성능향상이 나타남을 확인 했다. 레지스터 프로모션의 효과를 더 증대하기 위해 레지스터 프로모션의 범위를 함수 전체로 넓히고 핸들러 함수 호출에서 발생하는 오버헤드를 줄이는 최적화가 필요할 것으로 보인다.