• 제목/요약/키워드: Single high resolution satellite image

검색결과 38건 처리시간 0.026초

3D BUILDING INFORMATION EXTRACTION FROM A SINGLE QUICKBIRD IMAGE

  • Kim, Hye-Jin;Han, Dong-Yeob;Kim, Yong-Il
    • 대한원격탐사학회:학술대회논문집
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    • 대한원격탐사학회 2006년도 Proceedings of ISRS 2006 PORSEC Volume I
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    • pp.409-412
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    • 2006
  • Today's commercial high resolution satellite imagery such as IKONOS and QuickBird, offers the potential to extract useful spatial information for geographical database construction and GIS applications. Recognizing this potential use of high resolution satellite imagery, KARI is performing a project for developing Korea multipurpose satellite 3(KOMPSAT-3). Therefore, it is necessary to develop techniques for various GIS applications of KOMPSAT-3, using similar high resolution satellite imagery. As fundamental studies for this purpose, we focused on the extraction of 3D spatial information and the update of existing GIS data from QuickBird imagery. This paper examines the scheme for rectification of high resolution image, and suggests the convenient semi-automatic algorithm for extraction of 3D building information from a single image. The algorithm is based on triangular vector structure that consists of a building bottom point, its corresponding roof point and a shadow end point. The proposed method could increase the number of measurable building, and enhance the digitizing accuracy and the computation efficiency.

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단일 위성 영상 기반의 반자동 건물 모델링 시스템 (A Semi-Automatic Building Modeling System Using a Single Satellite Image)

  • 오선호;장경호;정순기
    • 정보처리학회논문지B
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    • 제16B권6호
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    • pp.451-462
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    • 2009
  • 최근 고해상도 위성 영상의 보급에 따라 이를 활용한 서비스가 증가하고 있다. 특히, $Google\;Earth^{TM}$$Virtual\;Earth^{TM}$와 같은 전 지구 차원 의 3차원 가시화 서비스나 최근 일부 도시에 대하여 제공되고 있는 3차원 GIS 서비스는 지형과 지물에 대한 사실적인 기하정보를 제공하고 있다. 이러한 서비스들은 도시 개발 계획의 수립, 도로망의 개선, 엔터테인먼트 사업, 군사 시뮬레이션, 재난 및 재해 관리 등의 다양한 분야에 활용이 가능하다. 이러한 활용을 위해서는 고해상도 위성 영상을 이용하여 지형 및 지물 정보를 효과적으로 추출하는 연구가 요구된다. 본 논문 에서는 단일 위성 영상으로부터 건물의 3차원 모델을 추출하기 위한 요구사항을 살펴본 뒤 이를 기반으로 효과적인 모델 추출을 위한 시스템 을 제안한다. 제안하는 시스템은 영상의 특징 정보와 건물, 위성, 태양의 기하 관계를 이용하여 최소한의 사용자 조작으로 건물의 3차원 모델을 추출한다. 마지막으로 실제 위성 영상으로부터 건물의 3차원 모델 추출을 수행하고 효과적으로 3차원 모델을 획득할 수 있음을 보인다.

구조-텍스처 분할을 이용한 위성영상 융합 프레임워크 (Image Fusion Framework for Enhancing Spatial Resolution of Satellite Image using Structure-Texture Decomposition)

  • 유대훈
    • 한국컴퓨터그래픽스학회논문지
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    • 제25권3호
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    • pp.21-29
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    • 2019
  • 본 논문에서는 구조-텍스처 분할 기법을 기반으로 위성영상을 분할 융합하여 공간 해상도를 개선시키는 프레임워크를 제시한다. 위성영상은 센서가 감지하는 파장에 따라 다양한 공간해상도를 가진다. 전정 영상 (panchromatic image)은 일반적으로 높은 공간해상도를 가지지만 단일 흑백컬러를 가지고 있는 반면, 다중분광 영상 (multi-spectral image)나 적외선 영상은 전정 영상에 비해 낮은 공간해상도를 가지지만 다양한 분광 밴드정보와 열 정보를 가지고 있다. 본 논문에서는 다중분광 영상이나 적외선 영상의 공간 해상도를 향상시키기 위해 영상의 디테일이 텍스처 영상에만 존재한다는 것에 착안하여 본 프레임워크를 고안하였다. 고안된 프레임워크에서는 저해상도 영상과 고해상도 영상이 구조 영상과 텍스처 영상으로 분할된 뒤, 저해상도 구조영상은 고해상도 구조 영상을 참조하여 가이디드 필터링 된다. 구조-텍스처 영상 모델에 따라 필터링된 저해상도 영상의 구조 영역과 고해상도 영상의 텍스처 영역을 픽셀 단위로 더해져서 최종 영상이 생성된다. 생성된 영상은 저해상도 영상의 밴드와 고해상도 영상의 디테일을 포함한다. 제시하는 방법은 분광해상도와 공간해상도를 모두 보존할 수 있음을 실험적으로 확인하였다.

Detection of The Pine Trees Damaged by Pine Wilt Disease using High Resolution Satellite and Airborne Optical Imagery

  • Lee, Seung-Ho;Cho, Hyun-Kook;Lee, Woo-Kyun
    • 대한원격탐사학회지
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    • 제23권5호
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    • pp.409-420
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    • 2007
  • Since 1988, pine wilt disease has spread over rapidly in Korea. It is not easy to detect the damaged pine trees by pine wilt disease from conventional remote sensing skills. Thus, many possibilities were investigated to detect the damaged pines using various kinds of remote sensing data including high spatial resolution satellite image of 2000/2003 IKONOS and 2005 QuickBird, aerial photos, and digital airborne data, too. Time series of B&W aerial photos at the scale of 1:6,000 were used to validate the results. A local maximum filtering was adapted to determine whether the damaged pines could be detected or not at the tree level from high resolution satellite images, and to locate the damaged trees. Several enhancement methods such as NDVI and image transformations were examined to find out the optimal detection method. Considering the mean crown radius of pine trees, local maximum filter with 3 pixels in radius was adapted to detect the damaged trees on IKONOS image. CIR images of 50 cm resolution were taken by PKNU-3(REDLAKE MS4000) sensor. The simulated CIR images with resolutions of 1 m, 2 m, and 4 m were generated to test the possibility of tree detection both in a stereo and a single mode. In conclusion, in order to detect the pine tree damaged by pine wilt disease at a tree level from satellite image, a spatial resolution might be less than 1 m in a single mode and/or 1 m in a stereo mode.

AUTOMATIC 3D BUILDING INFORMATION EXTRACTION FROM A SINGLE QUICKBIRD IMAGE AND DIGITAL MAPS

  • Kim, Hye-Jin;Byun, Young-Gi;Choi, Jae-Wan;Han, You-Kyung;Kim, Yong-Il
    • 대한원격탐사학회:학술대회논문집
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    • 대한원격탐사학회 2007년도 Proceedings of ISRS 2007
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    • pp.238-242
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    • 2007
  • Today's commercial high resolution satellite imagery such as that provided by IKONOS and QuickBird, offers the potential to extract useful spatial information for geographical database construction and GIS applications. Digital maps supply the most generally used GIS data probiding topography, road, and building information. Currently, the building information provided by digital maps is incompletely constructed for GIS applications due to planar position error and warped shape. We focus on extracting of the accurate building information including position, shape, and height to update the building information of the digital maps and GIS database. In this paper, we propose a new method of 3D building information extraction with a single high resolution satellite image and digital map. Co-registration between the QuickBird image and the 1:1,000 digital maps was carried out automatically using the RPC adjustment model and the building layer of the digital map was projected onto the image. The building roof boundaries were detected using the building layer from the digital map based on the satellite azimuth. The building shape could be modified using a snake algorithm. Then we measured the building height and traced the building bottom automatically using triangular vector structure (TVS) hypothesis. In order to evaluate the proposed method, we estimated accuracy of the extracted building information using LiDAR DSM.

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ESTIMATING CROWN PARAMETERS FROM SPACEBORNE HIGH RESOLUTION IMAGERY

  • Kim, Choen;Hong, Sung-Hoo
    • 대한원격탐사학회:학술대회논문집
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    • 대한원격탐사학회 2007년도 Proceedings of ISRS 2007
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    • pp.247-249
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    • 2007
  • Crown parameters are important roles in tree species identification, because the canopy is the aggregate of all the crowns. However, crown measurements with spaceborne image data have remained more difficult than on aerial photographs since trees show more structural detail at higher resolutions. This recognized problem led to the initiation of the research to determine if high resolution satellite image data could be used to identify and classify single tree species. In this paper, shape parameters derived from pixel-based crown area measurements and texture features derived from GLCM parameters in QuickBird image were tested and compared for individual tree species identification. As expected, initial studies have shown that the crown parameters and the canopy texture parameters provided a differentiating method between coniferous trees and broad-leaved trees within the compartment(less than forest stand) for single extraction from spaceborne high resolution image.

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삼각벡터구조를 이용한 고해상도 위성 단영상에서의 건물 높이 추출 (Building Height Extraction using Triangular Vector Structure from a Single High Resolution Satellite Image)

  • 김혜진;한동엽;김용일
    • 대한원격탐사학회지
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    • 제22권6호
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    • pp.621-626
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    • 2006
  • IKONOS나 QuickBird와 같은 고해상도 위성영상이 상용화됨에 따라 위성영상으로부터 3차원 건물 정보를 취득하기 위한 많은 연구가 진행되고 있다. 3차원 건물 높이를 추출하는 연구는 크게 스테레오 영상 기반의 연구들과 단영상 기반의 연구들로 나눌 수 있는데 센서 모델링을 수반하는 스테레오 영상 기반의 연구들은 그 과정이 복잡하고, 실제 스테레오 영상을 취득하기 위해서는 별도의 주문과 비용이 소요되는 등의 어려움이 따른다. 기존의 단영상을 이용한 건물 높이 추출 연구들은 대부분 DEM 등의 부가적인 데이터를 필요로 하며, 건물의 그림자 길이나 건물 지붕점과 바닥점 관측을 통해 높이를 추출하였다. 이러한 기법들은 도시지역과 같이 건물이 밀집한 지역에서는 적용하기 부적합하다. 이에 이태윤(2006)의 연구에서는 가상의 그림자 투영 기법을 이용하여 건물의 그림자가 다른 인공체에 드리운 경우에도 건물 높이 추출이 가능한 기법이 제안된 바 있으나 이 기법은 건물의 그림자 끝이 식별되지 않는 건물에는 적용이 불가능하다. 이에 본 연구에서는 고해상도 위성 단영상에서 보다 많은 건물 높이의 관측이 가능하도록 하는 삼각 벡터구조 기반의 새로운 기법을 제안하였다. 제안된 기법은 센서모델링 과정이나 부가적인 데이터 없이 간단히 구현 가능하며 디지타이징 과정에서 발생하는 오차를 줄일 수 있다.

Development of the forest type classification technique for the mixed forest with coniferous and broad-leaved species using the high resolution satellite data

  • Sasakawa, Hiroshi;Tsuyuki, Satoshi
    • 대한원격탐사학회:학술대회논문집
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    • 대한원격탐사학회 2003년도 Proceedings of ACRS 2003 ISRS
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    • pp.467-469
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    • 2003
  • This research aimed to develop forest type classification technique for the mixed forest with coniferous and broad-leaved species using the high resolution satellite data. QuickBird data was used as satellite data. The method of this research was to extract satellite data for every single tree crown using image segmentation technique, then to evaluate the accuracy of classification by changing grouping criteria such as tree species, families, coniferous or broad-leaved species, and timber prices. As a result, the classification of tree species and families level was inaccurate, on the other hand, coniferous or broad-leaved species and timber price level was high accurate.

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EXTRACTING BASE DATA FOR FLOOD ANALYSIS USING HIGH RESOLUTION SATELLITE IMAGERY

  • Sohn, Hong-Gyoo;Kim, Jin-Woo;Lee, Jung-Bin;Song, Yeong-Sun
    • 대한원격탐사학회:학술대회논문집
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    • 대한원격탐사학회 2006년도 Proceedings of ISRS 2006 PORSEC Volume I
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    • pp.426-429
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    • 2006
  • Flood caused by Typhoon and severe rain during summer is the most destructive natural disasters in Korea. Almost every year flood has resulted in a big lost of national infrastructure and loss of civilian lives. It usually takes time and great efforts to estimate the flood-related damages. Government also has pursued proper standard and tool for using state-of-art technologies. High resolution satellite imagery is one of the most promising sources of ground truth information since it provides detailed and current ground information such as building, road, and bare ground. Once high resolution imagery is utilized, it can greatly reduce the amount of field work and cost for flood related damage assessment. The classification of high resolution image is pre-required step to be utilized for the damage assessment. The classified image combined with additional data such as DEM and DSM can help to estimate the flooded areas per each classified land use. This paper applied object-oriented classification scheme to interpret an image not based in a single pixel but in meaningful image objects and their mutual relations. When comparing it with other classification algorithms, object-oriented classification was very effective and accurate. In this paper, IKONOS image is used, but similar level of high resolution Korean KOMPSAT series can be investigated once they are available.

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CREATION OF DIGITAL CITY MODEL FROM A SINGLE KOMPSAT-2 IMAGE

  • Kim, Hye-Jin;Choi, Jae-Wan;Han, You-Kyung;Kim, Yong-II
    • 대한원격탐사학회:학술대회논문집
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    • 대한원격탐사학회 2008년도 International Symposium on Remote Sensing
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    • pp.365-367
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    • 2008
  • A digital city model represents a 3D environment of a city with various city object information such as 3D building model, road, and land cover. Usually, at least two satellite images with some image overlap are necessary and a complex satellite-related computation needs to be carried out to create a city model. This is an expensive technique, because it requires many resources and excessive computational cost. The authors propose a methodology to create a digital city model including 3D building model and land cover information from a single high resolution satellite image. The approach consists of image pan-sharpening, shadow recovery, building occlusion restoration, building model extraction, and land cover classification. We create a digital city model using a single KOMPSAT-2 image and review the result.

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