• KSCE Journal of Civil and Environmental Engineering Research
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• v.31 no.3A
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• pp.173-180
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• 2011

This paper aims to propose an image processing technique for measuring the static displacement of bridges from general inspection photograph; the color, shape, and spatial transformations of an arbitrary image stored in bridge management system database are used. This study is verified by using numerical analyses with experiments; the results demonstrate that the static displacement of bridges are measured by proposed technique. Moreover, this technique is able to obtain the static structural response of the bridge with changes in temperatures.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.3 no.2
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• pp.32-38
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• 1985

The purpose of this paper is to develope the analytical calibration model and to present its efficiency and problems for elimination of systematic errors. For this purpose, lens distortion in close-range photogrammetry is analized. From the obtained accuracy of object space coordinates, it is found that the calibration model included only $K_1$ term is effective for metric camera, and film deformation has to be considered not only in non-metric camera but also in metric camera.

• Tunnel and Underground Space
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• v.19 no.6
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• pp.517-525
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• 2009

Stereophotogrammetry is used to extract spatial information of an interested object by constructing a stereo-image from two or more photos. In this study, the stereophotogrammetry was adopted for a rock joint survey in mine tunnels. The orientations of discontinuities were measured from two mine tunnels with a clinocompass. To evaluate the effect of photographing light level on the stereophotogrammetry analysis, the light intensity was changed within a predefined range for every photograph. Those photographs were analyzed by using a commercial code for stereophotogrammetry - ShapeMetriX 3D, and the results from the analysis were compared with the manual measurement using a clinocompass.

• The Optical Journal
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• s.134
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• pp.65-68
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• 2011

풍경을 촬영하다 보면 꽃의 아름다움과 함께 생태계의 독특한 신비로움을 담고 싶을 때가 있다. 그 중에서도 접사촬영을 통한 꽃의 촬영은 다양한 해석과 정서를 담아낼 수 있고 곤충촬영 역시 작은 세상을 가깝게 들여다 볼 수 있는 흥미로운 일이다. 이번호에서는 접사촬영을 통한 꽃과 곤충사진 촬영방법을 알아보자.

• Proceedings of the Korea Water Resources Association Conference
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• 2010.05a
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• pp.1822-1826
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• 2010

본 연구의 지리정보시스템(GIS)을 이용한 야계의 입지해석모델 개발은 사방댐 하류 야계에 대한 야계사방사업의 위치 선정, 하도계획 및 구조물 계획 등을 기 구축되어 있는 국가 DB와 강우 강도 산정, 홍수유출해석 및 수리계산 소프트웨어를 연계하여 체계적으로 표준화된 시스템을 구축하는 것이 목표이다. 따라서, 본 연구에서는 강우, 지형 지질 토지이용 자료를 이용하여 홍수유출해석을 통해 기본 홍수량을 산정하고, 홍수량과 수치지형도 및 항공사진으로부터 추출한 야계의 종단, 평면 및 횡단지형정보를 기본자료로 HEC-RAS의 지형자료(geometry data) 및 흐름자료(flow data)를 구축하여 수리계산을 수행하였다. 수리계산 결과를 토대로 종단, 평면, 횡단의 하도계획과 호안, 수제 및 하상유지공 등 구조물 계획 등에 필요한 야계입지해석모델을 개발하고자 하였다. 연구결과 강우, 지형 지질 토지이용, 항공사진 자료 등 국가 DB자료만을 이용하여 야계입지를 해석할 수 있는 시스템을 개발하였으며, 1 : 5000의 수치지형도 및 항공사진으로부터 야계부분에 대한 지형도를 분리하여 1m 간격의 등고선으로 된 수치지형도에서 야계의 종단, 평면 및 횡단지형정보를 기본자료로 수리계산을 위한 HEC-RAS의 지형자료(geometry data)를 구축할 수 있음을 제시하였다. 또한 수리계산 결과를 토대로 최심하상고, 수위, 수심, 유속, 소류력, Froude수 등 종단, 평면, 횡단의 하도계획과 호안, 수제 및 하상유지공 등 야계 구조물 계획 등에 필요한 수리학적 인자를 추출할 수 있었으며, 시험유역에 대한 적용 가능성을 검토한 결과 야계사방사업의 입지선정을 위한 수단으로 활용할 수 있음를 제시하였다.

• The Journal of the Korea Contents Association
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• v.14 no.12
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• pp.618-628
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• 2014

A photograph used in a film poster summarizes the story of the film that lasts for around two hours. The image must contain a picture that represents the story and text including the title, with various design elements composed in a harmonious way. However, given that a photograph is the most noticeable element in a film poster, this study aims to examine the function, role, and types of a film poster and analyze poster photographs. Currently, there are companies specialized in photography for film posters, but sometimes recognized photographers are commissioned to take a photograph that will be used for a film poster. Hein-kuhn Oh actively produced such photographs in the early and mid-2000s, and this study deals with 'how the photographs recreate the content of the films' focused on three selected photographs taken by him. Also, There were commonalities found between the tree photographs and Oh's personal portrait photographs, which were then analyzed from the photographic aesthetic point of view. The three selected works are: , , and .

• KSCE Journal of Civil and Environmental Engineering Research
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• v.7 no.2
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• pp.89-98
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• 1987

X-Ray photogrammetry is the method that register and analize the anatomical or physiological information about the human body by the photography form. In this paper, using X-Ray, accuracy of three dimensional coordinates of objects which are deformed and a part of human body is analyzed. An objective of this analysis lies in improving the accuracy of three dimensional coordinates and enhancing the practical use. Through the observation, X-Ray Photogrammetry is used in practical use. And X-Ray photograph is used the reform of graphical model by the determination of the three dimensional coordinates about all sides of object.

• The Journal of the Korea Contents Association
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• v.13 no.5
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• pp.126-134
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• 2013

The object of this study is to investigate how to effect on the response characteristic if the image were used in the internet survey about the social issues. Especially in case of the social issues with pros and cons opinions, the effects of the image on the response characteristics were investigated. In this study, the response attitude of the 4 different groups to 3 social issues was measured at March, 2013. The 4 different groups are following: group with only text information, group with positive image, group with negative image, and group with both image. It is shown in the outcome of analysis on survey that the group with negative images tend to respond negatively and the group with positive images tend to respond positively. It means the priming effect. As a conclusion of this study, if the image were used in the social investigation, the image should be selected discreetly and the effect of image should be reflected in the analysis in consideration of the priming effect of the image.

• The Sea:JOURNAL OF THE KOREAN SOCIETY OF OCEANOGRAPHY
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• v.3 no.4
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• pp.228-233
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• 1998

This study presents a close-range photogrammetry that is applicable to beach profile estimation using a non-metric camera. Based on the analysis of oblique video image in which the video camera was installed on a horizontal plane and the field of view was fixed, a new equation to analyze a photograph was developed considering the following aspects: (1) camera is allowed to be rotated about its optical axis and (2) a simple error model is adopted to correct lens distortion and other systematic errors associated with the non-metric camera, which improves accuracy of non-metric imageries. To test the modified technique, photographs of the beach were taken near the Donghae City in February, 1998. In addition, beach profiles were surveyed with conventional dumpy level and surveying staff. RMS error between the estimated and measured beach profiles is less than 10 cm in elevation.

• Journal of Korean Society for Geospatial Information Science
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• v.8 no.2 s.16
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• pp.89-99
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• 2000

The Quality and Accuracy of digital image is important factor for decision of accuracy in digital photogrammetry because all the inside works in digital photogrammetry are based on digital image. But it is still difficult to ensure quality assurance and appication of data because there is no distinct criterion about quality and accuracy of digital image when the works in digital photogrammetry is accomplished. This study presents optimal resolution of aerial photo through error analysis of image coordinate using auto inner orientation in digital photograrnrnetry workstation. In second step, we are valified to optimum resolution of aerial photo image with orientation analysis. Finally, we are established to validity optimal resolution of aerial photo image with production of ortho image and mosaic image using optimal resolution aerial photo image.