• 제목/요약/키워드: Dynamic texture

검색결과 96건 처리시간 0.024초

시험 비트열을 이용한 MPEG-4 텍스처 디코딩의 정적 Conformance Test (Static Conformance Test of MPEG-4 Visual Decoders Using Test Bitstreams)

  • 김우식;박인수;박수현;이병욱;박래홍
    • 대한전자공학회논문지SP
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    • 제38권1호
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    • pp.69-78
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    • 2001
  • MPEG-4 비주얼 conformance test는 비트열과 디코더가 주어진 프로파일과 레벨의 표준을 정확히 따르는 가를 시험하는 것이다. 디코더 시험에는 정적 시험과 동적 시험이 있는데 이중에서 정적 시험은 시험 비트열을 제작하여 제작된 디코더에서 복원된 영상과 참조 디코더에서 복원된 영상을 비교하여 수행할 수 있다. 본 논문에서는 텍스처 디코딩 부분의 정적 시험을 위한 시험 비트열을 제작하여 conformance test를 수행하는 과정을 보이고 그 결과를 보였다.

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물체 탐지와 범주화에서의 뇌의 동적 움직임 추적 (Brain Dynamics and Interactions for Object Detection and Basic-level Categorization)

  • 김지현;권혁찬;이용호
    • 한국감성과학회:학술대회논문집
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    • 한국감성과학회 2009년도 춘계학술대회
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    • pp.219-222
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    • 2009
  • Rapid object recognition is one of the main stream research themes focusing to reveal how human recognizes object and interacts with environment in natural world. This field of study is of consequence in that it is highly important in evolutionary perspective to quickly see the external objects and judge their characteristics to plan future reactions. In this study, we investigated how human detect natural scene objects and categorize them in a limited time frame. We applied Magnetoencepahlogram (MEG) while participants were performing detection (e.g. object vs. texture) or basic-level categorization (e.g. cars vs. dogs) tasks to track the dynamic interaction in human brain for rapid object recognition process. The results revealed that detection and categorization involves different temporal and functional connections that correlated for the successful recognition process as a whole. These results imply that dynamics in the brain are important for our interaction with environment. The implication from this study can be further extended to investigate the effect of subconscious emotional factors on the dynamics of brain interactions during the rapid recognition process.

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Interaction of Mechanics and Electrochemistry for Magnesium Alloys

  • Han, En-Hou;Wang, JianQiu;Ke, Wei
    • Corrosion Science and Technology
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    • 제7권5호
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    • pp.243-251
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    • 2008
  • Magnesium alloys become popular research topic in last decade due to its light weight and relatively high strength-to-weight ratio in the energy aspiration age. Almost all structure materials are supposed to suspend stress. Magnesium is quite sensitive to corrosive environment, and also sensitive to environmental assisted cracking. However, so far we have the limited knowledge about the environmental sensitive cracking of magnesium alloys. The corrosion fatigue (CF) test was conducted. Many factors' effects, like grain size, texture, heat treatment, loading frequency, stress ratio, strain rate, chemical composition of environment, pH value, relative humidity were investigated. The results showed that all these factors had obvious influence on the crack initiation and propagation. Especially the dependence of CF life on pH value and frequency is quite different to the other traditional structural metallic materials. In order to interpret the results, the electrochemistry tests by polarization dynamic curve and electrochemical impedance spectroscopy were conducted with and without stress. The corrosion of magnesium alloys was also studied by in-situ observation in environmental scanning electron microscopy (ESEM). The corrosion rate changed with the wetting time during the initial corrosion process. The pre-charging of hydrogen caused crack initiated at $\beta$ phase, and with the increase of wetting time the crack propagated, implying that hydrogen produced by corrosion reaction participated in the process.

다중해상도 kd-트리와 클러스터 유효성을 이용한 점증적 EM 알고리즘과 이의 영상 분할에의 적용 (Incremental EM algorithm with multiresolution kd-trees and cluster validation and its application to image segmentation)

  • 이경미
    • 한국지능시스템학회논문지
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    • 제25권6호
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    • pp.523-528
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    • 2015
  • 본 논문은 효율적인 영상 분할을 수행하기 위한 다중해상도와 동적인 성질을 가지고 있는 새로운 EM 알고리즘을 제안한다. EM 알고리즘은 가장 많이 사용되고 성능이 우수한 클러스터링 방법이다. 그러나, 기존의 EM 알고리즘은 다중해상도 데이터 처리에 대한 문제점과 클러스터 개수에 대한 사전 지식 요구라는 단점을 가지고 있다. 본 논문에서는 이러한 문제점을 해결하기 위해서 E-단계에 다중해상도 kd-트리를 적용함으로써 다중해상도 데이터 처리 문제를 해결하였고, 순차적 데이터에 따라 클러스터를 할당할 수 있데 하였다. 클러스터의 유효성을 검사하기 위해서, 클러스터 병합 원칙을 이용한다. 본 논문에서는 제안하는 알고리즘을 텍스쳐 영상 분할에 적용하였고, 우수한 성능을 보였다.

실리콘 마이크로 몰드와 유리의 열-재흐름 현상을 이용한 초소수성 유리 표면 제작 및 젖음 특성 평가 (Fabrication and Characterization of Superhydrophobic Glass Surfaces Using Silicon Micro-mold and Thermal-reflow Process)

  • 김승준;공정호;이동윤;김종만
    • 대한금속재료학회지
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    • 제50권8호
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    • pp.591-597
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    • 2012
  • This paper presents regularly micro-textured glass surfaces ensuring the superhydrophobic properties in the Cassie-Baxter regime. The proposed surfaces were fabricated simply and efficiently by filling the glass material into a silicon micro-mold with periodic micro-cavities based on a thermal-reflow process, resulting in a successful demonstration of the textured glass surface with periodically-arrayed micro-pillar structures. The static and dynamic wetting properties of the micro-textured glass surfaces were characterized by measuring the static contact angle (SCA) and contact angle hysteresis (CAH), respectively. In addition, the surface wettability was estimated theoretically based on Wenzel and Cassie-Baxter wetting theories, and compared with the experimental ones. Through the experimental and theoretical observations, it was clearly confirmed that the proposed micro-textured glass surfaces showed the slippery superhydrophobic behaviors in the Cassie-Baxter wetting mode.

EMOS: Enhanced moving object detection and classification via sensor fusion and noise filtering

  • Dongjin Lee;Seung-Jun Han;Kyoung-Wook Min;Jungdan Choi;Cheong Hee Park
    • ETRI Journal
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    • 제45권5호
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    • pp.847-861
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    • 2023
  • Dynamic object detection is essential for ensuring safe and reliable autonomous driving. Recently, light detection and ranging (LiDAR)-based object detection has been introduced and shown excellent performance on various benchmarks. Although LiDAR sensors have excellent accuracy in estimating distance, they lack texture or color information and have a lower resolution than conventional cameras. In addition, performance degradation occurs when a LiDAR-based object detection model is applied to different driving environments or when sensors from different LiDAR manufacturers are utilized owing to the domain gap phenomenon. To address these issues, a sensor-fusion-based object detection and classification method is proposed. The proposed method operates in real time, making it suitable for integration into autonomous vehicles. It performs well on our custom dataset and on publicly available datasets, demonstrating its effectiveness in real-world road environments. In addition, we will make available a novel three-dimensional moving object detection dataset called ETRI 3D MOD.

조선시대 복식에 표현된 선의 유형과 조형특성 (TheTypes and Formative Characteristics of Seon Represented of Costume in the chosun Dynasty)

  • 옥명선;박옥련;이주영
    • 복식
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    • 제53권8호
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    • pp.39-52
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    • 2003
  • This study was classified according to types added ‘Seon(선)’ to the dress of Chosun Dynasty and analyzed them into formative characteristics. the results were as follows ; 1, ‘Seon’ is divided into three types of the standard, the decoration and the application. According to three types, the types of the standard are subdivided into Jemul Seon(the shape put the right side into lining) and the different color Seon. The types of the decoration are subdivided into Stitch, Surround, Gild and Embroidery form. And the types of the application are subdivided into Piping, Fur, Braid and Metallic form. 2, It showed as the different color Seon and Jemul Seon in the case of men dress and as the different color Seon and Gild form in that of women dress. 3, Its application showed in the ceremonial dress and ‘Po(袍)’ types of men dress and in the ceremonial dress and as accessories of women dress. 4, It was used as complementary color tone in both men and women dress. 5, It was used as its surface in men dress and as its reverse side in women dress according to Seon of style. 6, It was used as ‘Sa(紗)’ in men dress and as ‘Dan(緞)’ in women dress according to Seon of texture. 7, Seon of an aesthetic characteristics was distinguished according to Seon of forms, that is to say, Jemul Seon standed for calm beauty, Two color Seon standed for dynamic beauty, Stitch, Surround and Piping form standed for delicate beauty, Gild and Embroidery form standed for brilliant beauty and Fur, Braid and Metallic form standed for solid beauty.

현대미술에 나타난 패브릭에 대한 고찰 - 08 광주 비엔날레 패브릭 작품 중심으로- (A Study on Fabrics Shown in Contemporary Art -Focused on Fabric Works in the Gwangju Biennale 2008-)

  • 정형호;배수정
    • 패션비즈니스
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    • 제14권4호
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    • pp.74-90
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    • 2010
  • The history of contemporary art in the 20th century can be said the history of changes. Today the variety of objects destroy the boundaries of each genre. This study aims to understand the relationship between fashion and art that becomes closer by examining contemporary art in the Gwangju Biennale 2008 to enlarge the range of understanding of mutual communication between contemporary art and fabrics which are the object of fashion. The research method was to investigate the characteristics and expression methods of object fabrics shown in contemporary art through the review of papers published at home and abroad, related literatures, and Internet materials. Also, the meaning, technique, and methods of fabrics were analyzed from works introduced in the Gwangju Biennale 2008. In order to achieve this purpose, fabric was examined as the object of work in Gwangju Biennale 2008. As a result, it is found that fabric plays an important role in changing environment newly with more dynamic, abundant, and comfortable and softer feeling than any other artistic materials and enlarging the boundaries of artistic materials by exploring formative possibility. Furthermore, its multi-dimensional expression characteristic presents unbounded possibility. Fabric which has long formed close relationship with human life has taken its place as one genre now. It departs from the past principles of fabric handicraft and the restriction of a classical norm and becomes characteristic of very wide-ranging selection of materials and free expression. Its soft and warm texture provides emotional stability for a human. Although the peculiarity of fabric as an active concept to human environment and new materials and technique based on the aesthetic consciousness of a human rely on the high development of industry, it is significant that artists' liberation from their concept and material sense is accompanied by the expression of freedom.

들뢰즈의 "주름 : Le Pli"을 통해 본 바로크 건축의 특성 (The Features of the Baroque Architecture viewed through the "Le Pli" of Deleuze)

  • 이영미;천득염
    • 건축역사연구
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    • 제17권6호
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    • pp.7-27
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    • 2008
  • The primary object of this study lies in reilluminating the meaning of the Baroque, through studying arts and architecture by means of the features of Baroque aesthetics suggested by Deleuze in his writing 'Le Pli' on the basis of Leibniz's 'Pli' concept. Through this study we can see the following. In the first place, the six features - pli, separation between the inner and the exterior, highs and lows, unfolding, texture and paradigm presented as the features of Baroque aesthetics - have to be understood not as being independent features but as those derived from a series of continuous process of folding and unfolding. In the second place, Deleuze's thinking ranging from the 'Pli' of the Baroque to the paradigm derived on the ground of Leibniz thinking is a dynamic world of folding and unfolding, ultimately seeking unity through the topological changes and succession repeating deterritorization and reterritorization. In the third place, most architectural trends claiming 'Fold Architect' or the 'Pli' of Deleuze as their architectural philosophy are committing errors of mass-producing standardized designs by confining the meaning of Deleuze's 'Pli' concept into a simple reproduction of plied superficial things. With this finding in mind, the concept of folding and unfolding examined through reilluminating the Baroque Architecture where the 'Pli' concept is embodied, suggests to us that the problems of contemporary architecture should be rightened, and shows us that it can become an architectural philosophy which can be concretely realized in architecture.

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Measurement of Mechanical and Physical Properties of Pepper for Particle Behavior Analysis

  • Nam, Ju-Seok;Byun, Jun-Hee;Kim, Tae-Hyeong;Kim, Myoung-Ho;Kim, Dae-Cheol
    • Journal of Biosystems Engineering
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    • 제43권3호
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    • pp.173-184
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    • 2018
  • Purpose: This study was conducted to investigate the mechanical and physical properties of a Korean red pepper variety for particle behavior analysis. Methods: Poisson's ratio, modulus of elasticity, shear modulus, density, coefficient of restitution, and coefficient of friction were derived for "AR Legend," which is a domestic pepper variety. The modulus of elasticity and Poisson's ratio were measured through a compression test using a texture analyzer. The shear modulus was calculated from the modulus of elasticity and Poisson's ratio. The density was measured using a water pycnometer method. The coefficient of restitution was measured using a collision test, and the static and dynamic friction coefficients were measured using a inclined plane test. Each test was repeated 3-5 times except for density measurement, and the results were analyzed using mean values. Results: Poisson's ratios for the pepper fruit and pepper stem were 0.295 and 0.291, respectively. Elastic moduli of the pepper fruit and pepper stem were $1.152{\times}10^7Pa$ and $3.295{\times}10^7Pa$, respectively, and the shear moduli of the pepper fruit and pepper stem were $4.624{\times}10^6Pa$ and $1.276{\times}10^7Pa$, respectively. The density of the pepper fruit and the pepper stem were $601.8kg/m^3$ and $980.4kg/m^3$, respectively. The restitution coefficients between pepper fruits, pepper stems, a pepper fruit and a pepper stem, a pepper fruit and plastic, and a pepper stem and plastic were 0.383, 0.218, 0.277, 0.399, and 0.148, respectively. The coefficients of static friction between pepper fruits, pepper stems, a pepper fruit and a pepper stem, a pepper fruit and plastic, and a pepper stem and plastic were 0.455, 0.332, 0.306, 0.364, and 0.404, respectively. The coefficients of dynamic friction between a pepper fruit and plastic and a pepper stem and plastic were 0.043 and 0.034, respectively.