• Proceedings of the KSRS Conference
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• 2002.10a
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• pp.553-558
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• 2002

Physical sensor model in pushbroom satellite images can be made from sensor modeling by rotation parameters and attitude parameters on the satellite track. These parameters are determined by the information obtained from GPS, INS, or star tracker. Provided from satellite image, an auxiliary data error is connected directly with an error of rotation parameters and attitude parameters. This paper analyzed how obtaining satellite images influenced errors of rotation parameters and attitude parameters. furthermore, for detailed analysis, this paper generated simulated satellite image, which was changed variously by rotation parameters and attitude parameters of satellite sensor model. Simulated satellite image is generated by using high-resolution digital aerial image and DEM (Digital Elevation Model) data. Moreover, this paper determined correlation of rotation parameter and attitude parameters through error analysis of simulated satellite image that was generated by various rotation parameters and attitude parameters.

• Proceedings of the KSRS Conference
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• 2003.11a
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• pp.219-221
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• 2003

With regarding to web GIS, OGC promotes WFS allowing a client to retrieve geospatial data encoded in GML which is a modeling language to encode the semantics, syntax and schema of geospatial information resources. Even though GML provides benefits for geographic description, it is too heavy to be processed by mobile devices. In order to address the issue, this paper evaluates GML service with WFS server and GML viewers. Through this paper, we get analyses of properties of GML geospatial data and the effects on wireless devices, which are expected to be fundamental materials onto a design of mobile applications.

• Proceedings of the KSRS Conference
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• 2003.11a
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• pp.866-868
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• 2003

In this paper, we developed those Directory Services based on the Web-Service, because Web-Service environments provide a suitable method to gather requested information in an appropriate way. The proposed architecture cooperate with other OpenLS(Open Location Service) Core Services ( Location Utility Service and Router Determin ation service) and is an interoperability one - it ident ifies those global elements of the global Web-Services network that are required in order to ensure interoperability between Web-Services. In this paper, a new architecture of Directory Service with OpenLS Core Services is proposed and tested in OpenLS Core Services environments.

• Proceedings of the KSRS Conference
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• 2003.11a
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• pp.204-206
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• 2003

In order to utilize remote sensed images effectively, a lot of image classification methods are suggested for many years. But, the accuracy of traditional methods based on pixel-based classification is not high in general. In this study, object oriented classification based on image segmentation is used to classify Landsat images. A necessary prerequisite for object oriented image classification is successful image segmentation. Object oriented image classification, which is based on fuzzy logic, allows the integration of a broad spectrum of different object features, such as spectral values , shape and texture. Landsat images are divided into urban, agriculture, forest, grassland, wetland, barren and water in sochon-gun, Chungcheongnam-do using object oriented classification algorithms in this paper. Preliminary results will help to perform an automatic image classification in the future.

• Proceedings of the KSRS Conference
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• 2003.11a
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• pp.549-551
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• 2003

Satellite images are utilized for various purposes and many people are concerned about them. But it is necessary to process geometric correction for using of satellite images. However, common user regards geometric correction, which is basic preprocessing for satellite image, as laborious job. Therefore we should provide an automatic geometric correction method for Landsat image using GCP chip database. The GCP chip database is the collection of pieces of images with geoinformation and is provided by XML web service. More specifically, XML web service enables common users to easily use our GCP chip database for their own geometric correcting applications.

• Proceedings of the KSRS Conference
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• 2003.11a
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• pp.631-633
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• 2003

Invisible networks have hidden bits flows from human being and become the periphery in the Internet overload; technologies become invisible and everywhere computing. The appearance of the calm environment requires a new relationship between human being and machines and geographic features: a paradigm shift. However no one says what next steps to those environments on details are, a reason why lots of people focus on the endeavors. In this paper, we touch the geographic features on ubiquitous environments and research the transition step of GIS mobile applications in order to achieve a natural integration of connectivity, capability and functionality.

• Proceedings of the Korea Information Processing Society Conference
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• 2022.11a
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• pp.275-276
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• 2022

본 연구는 웹캠을 기반으로한 시선 추적 알고리즘에 대한 성능을 실시간으로 분석함과 동시에 그 결과를 직관적으로 비교해볼 수 있는 프로그램 개발에 대한 것이다. 시선 추적을 위한 훌륭한 알고리즘들과 학습 모델이 개발되고 있으나 개발 대상 어플리케이션에 적합한 알고리즘을 선별하거나 파라미터를 최적화하기 위해서는 알고리즘의 성능을 빠르고 효과적으로 가늠해볼 수 있는 테스트베드 개발이 동반되어야한다. 따라서 본 연구는 웹캠을 기반으로 시선 추적 알고리즘을 구현한 사례와 함께 개발된 알고리즘의 성능을 테스트해볼 수 있는 프로그램 개발에 대한 내용을 기술하였다.

• Proceedings of the Korea Information Processing Society Conference
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• 2022.11a
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• pp.277-278
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• 2022

본 연구는 3차원 포인트클라우드로부터 단면 정보를 자동으로 추출할 수 있는 알고리즘에 관한 것이다. 3차원 스캐너로부터 획득한 포인트클라우드 데이터는 다양한 제조 공정의 결과물인 산업 제품의 접합 상태를 파악하는데 자주 사용된다. 하지만 많은 노이즈를 포함하는 포인트클라우드 데이터로부터 제조 상태에 대한 수치적인 결과를 반복적으로 획득하기에는 많은 비용이 수반된다. 따라서 본 연구는 산업 제품의 접합부에 대한 포인트클라우드로부터 단면 정보를 자동으로 추출할 수 있는 알고리즘을 소개하고자 한다.

• Proceedings of KOSOMES biannual meeting
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• 2018.06a
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• pp.184-185
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• 2018

• Journal of Korean Association for Spatial Structures
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• v.15 no.4
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• pp.24-30
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• 2015