• Cartoon and Animation Studies
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• s.36
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• pp.643-667
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• 2014

Recently, shooting photographs have become highly popular among general public and been used by various media such as digital camera, mobile, and kiosk. We could find that users prefer to Funology which is combined by fun and hardware technology on emotional point of view. Shooting photographs attracts user participation and makes effect of design to expand. The goal of this study is to classify user actions in a electronic kiosk which includes digital photography function based on the perspective of Funology and to bulit user behaviors model. Therefore user group model will be defined, and then interaction design guidelines of shooting photographs will be proposed. For this research, first of all, the concepts of Funology and user interaction with taking photographs are classified to three types which is based on literature investigation. Secondly, "Phodosee" kiosk is examined with Funology design elements which have been categorized beforehand. Then user's behaviors which are shown their interaction with "Phodosee" kiosk are observed and analyzed using video ethnography based on Funology perspectives. Finally, four persona models are suggested based on user's behaviors as follows; 1) to avoid being taken photography, 2) to try to shoot photography, 3) to participate shooting photography and 4) to lead others to take photography. To summarize this study, effects and limitations of Funology design elements using digital photography are discussed and guideline is suggested to improve user experience design.

• Proceedings of the Korean Association of Geographic Inforamtion Studies Conference
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• 2003.04a
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• pp.383-387
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• 2003

최근 고해상도의 영상의 출현과 더불어 도심지역의 지물ㆍ지모에 대한 상세한 묘사가 가능해지고 있다. 하지만 도심지역의 지물ㆍ지모의 복잡성으로 인하여 그 추출이 쉽지 않다, 특히, 건물에 의한 가림, 그림자에 의한 정보 왜곡 등의 발생으로 추출의 어려움을 겪고 있다. 건물에 의한 폐색은 다른 위치에서 촬영을 하므로서 보정을 할 수 있지만 그림자에 의한 영향은 촬영위치에 상관없이 항상 발생한다. 본 연구에서는 도심지역에서 촬영한 컬러항공사진에서 그림자에 의한 정보 왜곡을 보정하여 그 판독력을 증대하고자 한다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2014.07a
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• pp.269-270
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• 2014

본 연구는 스마트폰에 내장된 다양한 영상촬영 기술들이 교육영상 제작에 활용되는 사례를 제작 과정을 중심으로 고찰한 것이다. 모바일이 용이한 스마트폰은 대용량 메모리와 다양한 애플리케이션을 갖추고 있기 때문에 영상 촬영이 가능하다. 본 연구를 통해 스마트폰이 사전기획에서 영상의 후반작업에 이르기까지 효과적으로 사용됨을 알 수 있었다. 현대인들의 애용품인 스마트폰은 이제 통화에서부터 교육콘텐츠 제작에 이르기까지 없어서는 안 될 필수품이 된 것이다.

• 한국HCI학회:학술대회논문집
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• 2006.02a
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• pp.692-698
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• 2006

점점 더 많은 디지털 카메라와 휴대폰이 고해상도 카메라가 장착되고 대용량의 저장공간이 제공되면서 사용자들의 사진촬영 빈도가 증대하고 있다. 조만간 휴대폰의 저장된 사진을 효과적으로 관리하고 브라우징할 수 있는 기술이 필요한 시기가 올 것이다. 본 논문은 휴대폰이나 디지털 카메라 혹은 카메라가 장착되어 사진을 찍을 수 있는 모든 형태의 휴대단말에서 촬영된 개인사진을 지리적 위치정보를 이용하여 자동으로 분류하는 시스템을 제시한다. 기존의 시간정보를 이용하여 촬영시간의 근접성을 이용해 순차적으로 자동 분류하는 시스템과는 달리 위치정보를 이용하여 촬영위치에 따라 비순차적으로 자동 분류한다. 촬영위치 근접성을 결정하기 위해 밀도기반 클러스터링 알고리즘을 사용하여 전체 사진을 대분류하고 기존의 자동사진 분류방식에서는 다루지 않았던 일상사진과 비일상사진을 분류하고, 대분류된 사진을 시간정보를 이용하여 소분류 함으로서 자동 사진분류 성능을 높이고자 한다.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2017.11a
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• pp.3-5
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• 2017

가상 현실 시장은 꾸준한 성장을 하고 있다. 가상 현실 시장이 성장함에 따라 게임 엔진을 이용한 가상 현실콘텐츠 뿐만 아니라 실제 특수 디바이스를 이용하여 촬영한 $360^{\circ}$ 비디오 콘텐츠 시장도 성장하고 있다. 하지만 실제로 촬영한 $360^{\circ}$ 비디오같은 경우 4D 가상 현실 콘텐츠를 즐기기 위해서는 먼저 특수 장치와 $360^{\circ}$ 비디오 간의 이벤트를 정의해야 하는 성가심이 있다. 이러한 불편함을 극복하기 위해 물리적 감각 효과를 일으키는 객체를 인식하고 서술하는 기법을 제시한다. $360^{\circ}$비디오 내의 감각 효과를 일으키는 객체를 인식하고 좌표계 내에 위치를 설정하여 사용자와의 거리가 임계값 이하면 효과를 일으키게 하여 사전에 콘텐츠를 확인하고 감각 효과를 미리 설정하는 번거로움을 없앨 수 있다.

• The Optical Journal
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• s.136
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• pp.68-71
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• 2011

야경사진은 자연광 일색인 일상의 낮과는 달리 인공광과 자연광이 함께 어우러져 있는 밤의 풍경을 표현한다. 특히, 야경사진은 빛을 어떻게 효과적으로 이용할 것인가라는 문제에서 한 발 더 나아가 얼마만큼의 빛을 받아들일 것인가를 고민하게 하는 촬영이다. 바로 이 문제는 노출시간으로 연결되며 조리개 값을 실정하게 한다. 더불어 작가의 낭만적인 미적 감각을 함께 표현할 수 있는 촬영방법이다.

• Journal of radiological science and technology
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• v.39 no.4
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• pp.483-491
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• 2016

The conditions after exposure to digital mammography and digital breast tomosynthesis were analyzed. The examinations for the ACR phantom were done using manual exposure, not auto exposure, to examine image discrimination and patient dose. As a result, the following results were derived: In the CC exposure, the kVp was 2kVp higher while mAs decreased to 58.6% for the 3D tomography. Such result showed an approximate decrease of 60mAs. At that time, the patients' Average Glandular Dose (AGD) was 1.65mGy in 2D and 1.87mGy in 3D; thus, AGD of 3D was shown to have about 1.13times higher. The result of the manual exposure revealed a reduced mAs of up to 80%; there was no effect in the assessment standard in terms of image discrimination, resulting in more than 10 points. When mAs was reduced to 80% in the manual exposure for ACR phantom, AGD was decreased to 0.66mGy. The diagnostic values of images were maintained and patients dose was reduced in the manual exposure in the AEC condition for 3D. Since the use of 3D has recently increased, using the manual exposure has been recommended in this study to improve the diagnostic value, while, simultaneously reducing patients dose.

• Journal of the Korean Society of Radiology
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• v.11 no.5
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• pp.413-421
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• 2017

Mammography, the basic test for finding and treating increased breast cancer, gives the anxiety of cancer and radiation exposure to most women. In addition, it gave very severe compression pain, so we studied the degree of pain and tried to reduce the pain. The purpose of this study is to compare and analyze the modified imaging technique and the basic imaging technique based on clinical experience, respectively. The subjects of this study were 160 women from 30 to 60 years old who visited to Seoul Boramae Hospital operated by Seoul National University Hospital from February to March 2017 for breast screening. Modified 80 persons and 80 persons were divided into two groups, and each group was asked to fill out questionnaires sequentially without knowing the subjects. The first method is a modified method in which an automatic pedal is divided into four or more presses, a manual pressure is used together, and an attitude is described in detail. Secondly, we used only the automatic pedal compression method and press it within 1-3 times. In the mean of the pain distribution, the experimental group (modified method) was 2.49 and the control group (basic method) had an average of 4.86, which showed 48.8% less pain. In this modified method, the pain scores of the experimental group were lower than those of the control group, and the degree of the pain was statistically significant.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.11 no.9
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• pp.3347-3352
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• 2010

It is recommended that the door of control room is closed during radiography to protect a radiologic technologist. However, for those patients such as of emergency or pediatrics, the door must be kept open unavoidably to apply immediate medical administration and treatment on the potential case of emergency which could be happened through the course of radiography. In addition, it could be efficient by reducing patients waiting time when the door is open for a general case. This study was conducted to evaluate practical exposure rate to a radiologic technologist when the door is open during the radiography, and to find out the ways to minimize radiation exposure and to increase the efficiency simultaneously. Measuring practical exposure rate was fulfilled with glass dosimeter, and it was 2.02 mGy/week at the location of radiologic technologist under the condition that the door is open during the radiography, which was about 2.3 times higher than the 100 mR/week. It means that the considerable amount of scattered rays through the door opening, and increase exposure rate at the radiologic technologist. Hence we confirmed that a radiologic technologist probably overexposed if the door is open during the radiography. It was also confirmed by the Monte Carlo simulation that the exposure rate could be reduced up to approximately 1/100 by change only the door opening direction. In conclusion, since the proper door opening direction provides same shielding effect whether it is open or close, the door opening direction need to be considered when it is installed at radiography facilities.

• Journal of radiological science and technology
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• v.31 no.4
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• pp.337-346
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• 2008

A questionaire survey was conducted for patients who had been examined at the Department of Radiology to investigate the items that need to be improved. Brainstorming was also conducted by team members to suggest the tactics that can efficiently perform the QI activity by selecting the most frequently answered topics for the reduction of waiting time of x-ray examination. From September 2006 to November 2007, number of patients before and after conducting QI was compared for 3 months by each category differentiated by types of detailed causes. A patient case was set as one shooting for one patient. After conducting QI, the waiting cases before conducting QI were evaluated for the method of improvement for 3 month through the QI team discussion and conducted by following the improvement method for the next 1 month and the waiting cases were measured and the difference before and after the QI activity was compared in percentage. 1. When patient waiting cases were compared before and after conducting QI activity against the causes of repetition, it resulted in 3.9% of reduction effect. 2. When patient waiting cases were compared before and after conducting QI activity against the causes for the lack of guiding, it resulted in 1.1% of reduction effect. 3. When patient waiting cases were compared before and after conducting QI activity against the causes of miss-inputting prescription, it resulted in 1.1% of reduction effect. 4. When patient waiting cases were compared before and after conducting QI activity against the causes for emergency patients, patients with acute pain and discomfort patients, it resulted in 12.0% of reduction effect. 5. When patient waiting cases were compared before and after conducting QI activity against the causes for shooting overlapping of outpatients and hospitalized patients, it resulted in 4.7% of reduction effect. There are many factors to reduce the patient waiting cases in radiography. The first step is for radiology department to find these factors through QI, to improve them, which is the reason why the QI team is organized to perform the QI activities.