• 한국지구물리탐사학회:학술대회논문집
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• 2003.11a
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• pp.526-528
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• 2003

There are some reports which are about measuring the discontinuity from 3D model of rock surface. To generate 3D model is mainly based on remote sensing technique like laser scanning and digital stereo photogrammetry. It is obtained the DEM of the rock slope using above techniques in this study, and examined a suitability and improvement of the photogrammetry for the rock slope by overlap the DEM. It seems that accuracy of DEM generated by photogrammetry technique is influenced by the geometry of rock and type of joint.

• Proceedings of the KIEE Conference
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• 1987.11a
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• pp.534-538
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• 1987

State-space techniques are employed to derive an equivalent nonlinear recurrent time-domain model that describes the series resonant converter behavior exactly. This model is employed effectively to analyze large signal behavior by propagating the recurrent equation and matching boundary conditions through digital computation. The model is verified with a laboratory converter for a steady-state operation.

• Journal of The Korean Radiological Technologist Association
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• v.27 no.2
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• pp.222-228
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• 2001

Ⅰ. Purpose : The development of new imaging techniques and the increasing proportion of medical imaging modalities that generate images in digital form has naturally lead to the development of digital image management systems. Many people would agree that

• 한국정보디스플레이학회:학술대회논문집
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• 2007.08a
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• pp.993-996
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• 2007

Depending on applications where transmission bandwidth, wire distance, power consumption and EMI environments vary, design trade-offs must be made to optimize the display interface. After introducing the digital display interface architecture, topics such as cost, EMI, signal integrity, scalability and content protection are discussed with available techniques. Implementation issues are discussed regarding their cost and design complexity. Existing standards are reviewed and comparison on their strengths and shortcomings are discussed.

• Proceedings of the IEEK Conference
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• 2000.07b
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• pp.815-818
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• 2000

As the growth of internet and the diffusion of wide multimedia applications are increased, the ownership verification and authentication in communication channel for a digital image become more important. For these purpose there are many watermarking scheme available for image, video stream and audio data. In this paper we studied on techniques for integrity and authentication of digital images and proposed new watermarking algorithm. The proposed algorithm is implemented in C language on IBM-PC and the test results are shown.

• Communications for Statistical Applications and Methods
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• v.11 no.3
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• pp.503-511
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• 2004

In Korea, OCR-based techniques have been developed for digital library construction of historical documents. In this paper, we propose the nonlinear transform of contour directional feature (CDF) vectors using log it and power transforms with skewness criterion to enhance the discriminant power. Experiments were conducted using samples from Seung-jung-won diaries (Diaries of King's Secretaries). Our results show that proposed method outperforms the others like Box-Cox transform in this database.

• Proceedings of the Korea Contents Association Conference
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• 2019.05a
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• pp.55-56
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• 2019

본고는 캐나다 국립영화위원회(NFB, National Film Board of Canada)의 단편 애니메이션 (1999) 속에 재현을 위한 새로운 시도로서 로토스코핑 기법이 갖는 미학적 의미를 도출해내고자 한다. 이러한 연구를 통해, 관습적인 제작방식에서의 탈피와 응용이 창조적 정신을 갖춘 작가를 배양할 수 있음을 강조하고, 로토스코핑 기법의 새로운 미학 발견으로 인한 다양한 영상 분야 속 로토스코핑의 효과적 도입 가능성을 함께 제시하고자 한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2023.11a
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• pp.138-139
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• 2023

최근에 들어 디지털 트윈에 대한 관심이 급증하고 있다. 디지털 트윈은 컴퓨터 기반 시뮬레이션을 통해 물리적 사물이나 현상을 모사함으로써 대상을 최적화하는 기술이다. 그러나 기존의 독립된 디지털 트윈으로는 현실의 복합적인 상호작용을 분석할 수 없다는 한계가 존재한다. 이를 극복하고자 도입된 개념이 연합 디지털 트윈이다. 본 논문에서는 연합 디지털 트윈의 기술적 정의를 살펴보고, 이를 활용한 디지털 트윈의 모듈화 기법을 제안한다.

• Journal of Digital Contents Society
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• v.16 no.1
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• pp.113-121
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• 2015

Artifact pattern representation of a method using the digital technology is largely are two digital rubbing technique and digital contrast technique. Digital rubbing technique is clearly with the naked eye to see the original prestigious and difficult to build a digital rubbing data patterns by scanning a prestigious and patterns carved into the artifacts in three dimensions without compromising the circle to represent the three-dimensional effect by contrast it to the objective value refers to a technique that can be represented in digital. Digital contrast technique can not be calculated if the depth information of the object due to the glassy film of artefacts in a three-dimensional surface scanning and the application of this technique refers to a realistic image mapped digital technique for generating digital image contrast. Digital rubbing technique is mainly useful to express the most prestigious and patterns expressed in pottery or tile and stone monument, etc. engraved or embossed, digital contrast techniques can be used effectively to artifacts such as magnetic or glass can not be applied to the digital rubbing technique.

• Journal of Institute of Control, Robotics and Systems
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• v.13 no.5
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• pp.487-492
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• 2007

This paper presents the development of digital robust fuzzy controller for uncertain nonlinear systems. The proposed approach is based on the intelligent digital redesign(IDR) method with considering the relaxed stability condition of fuzzy control system. The term IDR in the concerned system is to convert an existing analog robust control into an equivalent digital counterpart in the sense of the state-matching. We shows that the IDR problem can be reduced to find the digital fuzzy gains minimizing the norm distance between the closed-loop states of the analog and digital robust control systems. Its constructive conditions are expressed as the linear matrix inequalities(LMIs) and thereby easily tractable by the convex optimization techniques. Based on the nonquadratic Lyapunov function, the robust stabilization conditions are given for the sampled-data fuzzy system, and hence less conservative. A numerical example, chaotic Lorentz system, is demonstrated to visualize the feasibility of the proposed methodology.