• Title/Summary/Keyword: Imagery

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Enhancing LANDSAT TM to update the structural analysis of the Mirs Bay Basin, Hong Kong, China

  • Leung, K.F.;Vohora, V.K.;Chan, L.S.;Malpas, J.G.
    • Proceedings of the KSRS Conference
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    • 2003.11a
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    • pp.295-297
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    • 2003
  • The coastal provinces of South China have been uniquely shaped by various tectonic events. During the midlate Mesozoic tectono-thermal event, the oblique subduction of the Paleo Kula-Pacific plate beneath the Eurasian plate has created a complicated tectonic setting for the whole region. However, the mechanism of this event is not completely understood. In this paper, we discuss the advantages of using LANDSAT TM satellite imagery over a small part of the region - the Mirs Bay Basin which is largely covered by dense vegetation and where limited outcrops is seen. The use of satellite imagery complements field mapping and the result shows a prominent sinistral offset along the eastern margin of the Mirs Bay Basin, which was not previously recognized on the ground.

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Application of Quantitative Indices for Urban Environment Analysis in the Consideration of Remote Sensed Imagery: Accessibility and Connectivity

  • Lee, Ki-Won;Oh, Se-Kyung
    • Proceedings of the KSRS Conference
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    • 2003.11a
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    • pp.228-230
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    • 2003
  • In this study, uses of remote sensed imagery in urban environment analysis are represented with the actual processed results with newly implemented programs running under ESRI ArcView-GIS to extract secondary information about mainly urban transportation environment. Implemented programs are about Accessibility index and Connectivity index. Accessibility index and Connectivity index are composed of four types of different algorithms and three types of algorithms such as alpha, gamma, and shimmel index. As show applied examples, tried to find out how remotely sensed imageries can be effectively utilized at actual processing in the direct or indirect ways in these algorithms.

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Watershed Segmentation of High-Resolution Remotely Sensed Imagery

  • WANG Ziyu;ZHAO Shuhe;CHEN Xiuwan
    • Proceedings of the KSRS Conference
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    • 2004.10a
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    • pp.107-109
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    • 2004
  • High-resolution remotely sensed data such as SPOT-5 imagery are employed to study the effectiveness of the watershed segmentation algorithm. Existing problems in this approach are identified and appropriate solutions are proposed. As a case study, the panchromatic SPOT-5 image of part of Beijing urban areas has been segmented by using the MATLAB software. In segmentation, the structuring element has been firstly created, then the gaps between objects have been exaggerated and the objects of interest are converted. After that, the intensity valleys have been detected and the watershed segmentation have been conducted. Through this process, the objects in an image are divided into separate objects. Finally, the effectiveness of the watershed segmentation approach for high-resolution imagery has been summarized. The approach to solve the problems such as over-segmentation has been proposed.

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A Fast Algorithm for Target Detection in High Spatial Resolution Imagery

  • Kim Kwang-Eun
    • Proceedings of the KSRS Conference
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    • 2006.03a
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    • pp.7-14
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    • 2006
  • Detection and identification of targets from remotely sensed imagery are of great interest for civilian and military application. This paper presents an algorithm for target detection in high spatial resolution imagery based on the spectral and the dimensional characteristics of the reference target. In this algorithm, the spectral and the dimensional information of the reference target is extracted automatically from the sample image of the reference target. Then in the entire image, the candidate target pixels are extracted based on the spectral characteristics of the reference target. Finally, groups of candidate pixels which form isolated spatial objects of similar size to that of the reference target are extracted as detected targets. The experimental test results showed that even though the algorithm detected spatial objects which has different shape as targets if the spectral and the dimensional characteristics are similar to that of the reference target, it could detect 97.5% of the targets in the image. Using hyperspectral image and utilizing the shape information are expected to increase the performance of the proposed algorithm.

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UPWELLING FILAMENTS AND THEIR ROLE IN CROSSFRONTAL WATER EXCHANGE

  • Kostianoy, A.G.;Soloviev, D.M.
    • Proceedings of the KSRS Conference
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    • v.2
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    • pp.954-957
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    • 2006
  • Satellite data (thermal and color imagery) show that offshore flowing filaments off the west coasts of North America, North and South Africa can influence significantly the cross-frontal mixing in the coastal upwelling zones. To evaluate this role, we investigated structure, dynamics and behavior of surface filaments in the Canary and Benguela upwelling regions on the base of daily satellite IR and VIS imagery (AVHRR NOAA, MODIS-Aqua). It was found that seasonal variability of the filaments location depends on intra-annual shift of general upwelling intensity along the coast. The main statistical characteristics of filaments - length, width, temperature anomaly and estimates of velocity were obtained. Estimates of cross-frontal water exchange due to filamentation based on the statistical data show that these coherent structures play a major role in the water and particle exchange between coastal zone and the open ocean in both upwelling regions.

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The Study of Clothing Imagery Expressed in Moliere`s PlayII-focused on Les precieuses Ridicules- (Moliere의 희극에 나타난 의상 Imagery에 관한 연구II-재치를 뽐내는 아가씨들을 중심으로-)

  • 이영숙
    • The Research Journal of the Costume Culture
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    • v.9 no.3
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    • pp.447-457
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    • 2001
  • Moliere completed classical French comedy by combining farce and commedia dell\`arte. Moliere believed that it was a plays obligation to give a lesson and entertainment. Moliere recreated commedia dell\`arte\`s typical acting patterns and characters in his work. He created with Lully comedie ballet that combined ballet and comedie for taste of Louis 14. Les precieuses ridicules critically displayed women at that time. Both contemporary high status women\`s custom and behavior were the targets of the author\`s synical criticism. There are three notable clothing imageries are shown in this work. First, Moliere used a variety of items in order to show emptiness of noble at that time. Items are ribbon and loop decorated rhingrave, feather decorated hat, perfumed wig and glove, lace covered canon and flower decorated shoes. Second, the author showed people\`s stutus through their clothes. Last, the author used clothing used clothing as a metaphor for hypocrisy. Thus when he said “take off the clothes” he meant take off hypocrisy and return truth.

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An Estimation of the of Tropical Cyclone Size Using COMS Infrared Imagery (천리안 위성 적외영상 자료를 이용한 태풍강풍반경의 산출)

  • Lee, Yoon-Kyoung;Kwon, MinHo
    • Atmosphere
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    • v.25 no.3
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    • pp.569-573
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    • 2015
  • An algorithm to symmetric radius of $15ms^{-1}$ isotaches of tropical cyclones is suggested using infrared (IR) imagery of geostationary satellite. It is assumed that symmetric tangential winds outside the maximum winds exponentially decrease with the radial distances of the tropical cyclone, which has a clear eye-wall structure. Four parameters for estimation of the tropical cyclone size are center location, maximum sustained wind, radius of the maximum wind, and relaxation coefficient for the decreasing rate with distances of the tropical cyclone. The estimation results are limitedly verified as comparing to surface winds of polar orbiting satellite such as ASCAT data.

DISCRIMINATING MAJOR SPECIES OF TREE IN COMPARTMENT FROM OPTIC IMAGERY AND LIDAR DATA

  • Hong, Sung-Hoo;Lee, Seung-Ho;Cho, Hyun-Kook
    • Proceedings of the KSRS Conference
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    • 2008.10a
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    • pp.41-44
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    • 2008
  • In this paper, major species of tree were discriminated in compartment by using LiDAR data and optic imagery. This is an important work in forest field. A current digital stock map has created the aerial photo and collecting survey data. Unlike high resolution imagery, LiDAR data is not influenced by topographic effects since it is an active sensory system. LiDAR system can measure three dimension information of individual tree. And the main methods of this study were to extract reliable the individual tree and analysis techniques to facilitate the used LiDAR data for calculating tree crown 2D parameter. We should estimate the forest inventory for calculating parameter. 2D parameter has need of area, perimeter, diameter, height, crown shape, etc. Eventually, major species of tree were determined the tree parameters, compared a digital stock map.

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SUBPIXEL UNMIXING TECHNIQUE FOR DETECTION OF USEFUL MINERAL RESOURCES USING HYPERSPECTRAL IMAGERY

  • Hyun, Chang-Uk;Park, Hyeong-Dong
    • Proceedings of the KSRS Conference
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    • 2008.10a
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    • pp.66-67
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    • 2008
  • Most mineral resources are located in subsurface but mineral exploration starts with a step of investigation in wide-area to find evidence of buried ores. Conventional technique for exploration on wide-area as a preliminary survey is an observation using naked eyes by geologist or chemical analysis using lots of samples obtained from target area. Hyperspectral remote sensing can overcome those subjective and time consuming survey and can produce mineral resources distribution map. Precise resource map requires information of mineral distribution in a subpixellevel because mineral is distributed as rock components or narrow veins. But most hyperspectral data is composed of pixels of several meters or more than ten meters scale. We reviewed subpixel unmixing algorithms which have been used for geological field and tested detection ability with Hyperion imagery, geological map and seven spectral curves of mineral and rock specimens which were obtained from study areas.

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Stereo Matching Method using Directional Feature Vector (방향성 특징벡터를 이용한 스테레오 정합 기법)

  • Moon, Chang-Gi;Jeon, Jong-Hyun;Ye, Chul-Soo
    • Journal of Institute of Control, Robotics and Systems
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    • v.13 no.1
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    • pp.52-57
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    • 2007
  • In this paper we proposed multi-directional matching windows combined by multi-dimensional feature vector matching, which uses not only intensity values but also multiple feature values, such as variance, first and second derivative of pixels. Multi-dimensional feature vector matching has the advantage of compensating the drawbacks of area-based stereo matching using one feature value, such as intensity. We define matching cost of a pixel by the minimum value among eight multi-dimensional feature vector distances of the pixels expanded in eight directions having the interval of 45 degrees. As best stereo matches, we determine the two points with the minimum matching cost within the disparity range. In the experiment we used aerial imagery and IKONOS satellite imagery and obtained more accurate matching results than that of conventional matching method.