• Journal of Korean Society for Geospatial Information Science
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• v.5 no.2 s.10
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• pp.87-97
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• 1997

For real-time data Process of digital images, all things that related to problem-domain are understood individual object and then it Is necessary to program using object oriented approach to grasp all problem as a objects operation by means of message transmission among objects. In this study, for digital photogrammetry class is designed using object oriented programming and class hierarchy is established Also, it is very useful to construct to digital photogrammetry system using class library when it is applied to close range photogrammetry.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.14 no.1
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• pp.17-25
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• 1996

The development of still video CCD cameras has simplified dramatically the digital imaging process. Still video cameras have flexibility that allows digital image acquisition and on-board image storage without being connected to a computer. The objective of this paper is to evaluate the performance of digital close-range photogrammetric system using the still video camera for dimensional inspection and structural monitoring being required in various industries. Some sub-pixel measurement techniques, which is indispensable for digital image measurement, were suggested. The author carried out the self-calibration of a high resolution DCS420 still video camera and then test application of a structure. The self-calibrating bundle adjustments resulted in object space accuracies which exceed 1 :46,000. It is ascertained that this digital close-range photogrammetric system has high accuracy potential and task effectiveness for industrial applications.

• Journal of the Korean earth science society
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• v.39 no.1
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• pp.46-52
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• 2018

This paper is to study the development of three dimensional Digital Surface Model (DSM) using photogrammetry technique based on self-developed Drone (Unmanned Aerial Vehicle (UAV)). To develop DSM, we selected a study area in Jeju island and took 24 pictures from the drone. The three dimensional coordinates of the photos were made by Differential Global Positioning System (DGPS) surveying with 10 ground control points (GCP). From the calculated three dimensional coordinates, we produced orthographic image and DSM. The accuracy of DSM was calculated using three GCPs. The average accuracy of X and Y was from 8.8 to 14.7 cm, and the accuracy of Z was 0.8 to 12.4 cm. The accuracy was less than the reference accuracy of 1/1,000 digital map provided by National Geographic Information Institute (NGII). From the results, we found that the self-developed drone and the photogrammetry technique are a useful tool to make DSM and digital map of Jeju.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.22 no.3
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• pp.233-244
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• 2004

Recently, digital image is increasing greatly practical use degree in several industry fields including construction. And interest about 3D digital image that can express practical object realistically is augmented greatly. In this study, developed 3D digital image generation system based on digital photogrammetry and created 3D digital image fer object. And, wished to verify of 3D digital image through comparative analysis with processing result by digital photogrammetry system been using much the latest for acquisition of 3D information. Also, wished to apply to surface information acquisition about rock slope and execute investigation about discontinuity of joint etc. As the result, could created 3D digital image fur object using the 3D digital image generation system developing in this study, and acquire surface information about rock slope efficiently.

• Proceedings of the Korean Society of Surveying, Geodesy, Photogrammetry, and Cartography Conference
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• 2005.11a
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• pp.379-392
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• 2005

• 한국지형공간정보학회:학술대회논문집
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• 2002.11a
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• pp.81-92
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• 2002

일반적으로 수치사진측량시스템을 통해 도심지역에서 자동으로 DEM을 추출하는 경우 해석도화원도에서 추출하는 DEM에 비하여 정확도가 크게 저하되어 도심지역에 대한 정사투영영상 생성이나 정사투영영상을 이용한 수치지도 제작시 품질저하의 요인이 되고 있다. 따라서 본 연구는 수치사진측량기법을 이용한 도심지역 지형공간정보 생성시 정확도에 영향을 크게 미치는 도심지역 DEM의 정확도를 향상시키는데 목적이 있다. 본 논문의 수행결과, 수치사진측량기법을 이용하여 도심지역에 대한 DEM 추출시 대상지역에 대한 지형분류를 통한 DEM추출방법을 적용하여 도심지역에 대한 DEM의 정확도를 향상시킬 수 있었다.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.19 no.2
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• pp.109-115
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• 2001

Recently, in accordance with the introduction of Digital Photogrammetry Systems the use of Digital ortho-photo images have increased and progressed in the study which extract the features from digital ortho-photo image semi-automatically or automatically. However, there are a limit. It has proved in many studies that recognition of the attribution or the features from panchromatic aerial photo is restricted. In this study, I compared color aerial images with panchromatic aerial images and analyzed the characteristics of color aerial images and feature entities which can be extracted semi-automatically. I analyzed extracted feature entities are compared with digital map at a scale of 1:5,000 have constructed in National Geography Institute. With this result, I analyzed the capability of feature extraction and proposed a plan for the study in the future.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.17 no.2
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• pp.105-116
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• 1999

Owing to the rapid development of computer system and the introduction of image processing technique, recent photogrammetric studies have been concentrated on the automation of photogrammetric orientation work that have been carried out by skilled professionals in analog and/or analytical pbotogrammetric field. To automate the whole photogrammetric work, the automation of the orientation processes including interior, relative and absolute orientation should be preceded. This study aims to automate interior orientation and relative orientation process. For this purpose, we applied Hough transform to interior orientation process and object space matching technique to relative orientation process. As the result of this study, we can present a method to automate interior and relative orientation process that has been semi-automatically operated in most commercial digital photogrammetric workstations currently available.

• Proceedings of the Korean Society of Surveying, Geodesy, Photogrammetry, and Cartography Conference
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• 2002.10a
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• pp.89-92
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• 2002

• Proceedings of the KSRS Conference
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• 2001.03a
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• pp.15-18
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• 2001

아리랑 1호 위성은 EOC 센서를 이용하여 지도제작에 활용될 수 있는 고해상도의 입체영상을 제공하는 기능을 포함하고 있다. 그러나, 기존의 사진측량 도화장비나 대부분의 수치사진측량 시스템에서 아리랑 1호 위성영상을 이용한 도화기능이 제공되고 있지 않으므로, 아리랑 1호 위성영상을 이용한 지도제작은 정사영상에 의한 영상지도 제작으로 국한되어 이루어져 왔다. 본 연구에서는 상용 수치사진측량 시스템 상에서 아리랑 1호의 입체위성영상을 DLT 모델에 적용하여 입체표정을 수행한 후에 도화작업을 시범적으로 실시하였다. 또한 그 결과를 분석함으로써 아리랑 1호 입체영상에 의한 도화원도 제작의 범위와 타당성을 분석하였다.