• 기록학연구
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• 제62호
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• pp.225-258
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• 2019

조선의 개항 이후 조선 말기와 대한제국 시대를 찍은 사진기록물은 당시의 기술적 수준이나 대외 개방의 정도를 감안하면 생각보다 많이 존재한다. 한국 관련 사진기록은 서구 사회에 한국을 소개하기 위해 인쇄한 서적의 삽화, 화보 신문이나 잡지의 도판, 빈티지 프린트, 사진엽서, 스테레오 사진, 카드형 사진, 랜턴슬라이드(Lantern Slide) 등 다양한 형태로 보급되었고, 현재도 상당량이 남아 있다. 관련 연구자들의 견해에 따르면 조선 사람이 처음 사진에 찍힌 1863년부터 1910년 이전에 촬영된 한국 관련 사진은 최소 3,000점에서 4,000점 이상이고, 같은 사진이 중복되기는 하지만 발행된 사진엽서의 수는 25,000점 이상이며, 그중 대부분이 현존하고 있다고 한다. 본 논문은 근대 초기인 구한말 한국 관련 사진기록이 생산되고 유통되는 경로를 크게 두 가지로 분류하고, 이를 전형적인 사진가 또는 기관의 활동 사례를 들어 분석했다. 사진에 찍힌 대상은 분명 한국 또는 한국인의 모습이지만, 사진의 생산 주체는 거의 대부분 제국주의의 부역자들인 서양인들과 일본인들이었다. 사진의 경우 생산 주체의 필요나 관점에 따라 사실 관계의 왜곡 가능성이 무척 크다. 그 왜곡을 바로 잡기 위해서는 사진의 내용뿐만 아니라 생산자의 의도와 생산 및 소통 경위가 파악되어야 한다. 세월이 많이 흘러 실제 경험자가 없는 시대의 사진기록을 정확하고 공정하게 판독하는 문제는 근대 한국을 올바르게 이해하고 한국의 근현대사를 폭넓게 연구하기 위한 초석이기 때문이다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제5권11호
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• pp.2160-2174
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• 2011

In this paper, a new technique for color reproduction based on color variation characteristics of digital camera under a dim light condition is proposed. Generally, photographers should adjust a camera exposure properly for obtaining an image with real color tone of subjects. Thus, in case of taking a picture under a dim light condition, the exposure time of a camera has to be relatively longer than the one under a bright light condition. Although images with real color tone of the subject are obtained, the images may get blurred due to the shaky hands of photographer holding the camera. In order to avoid the blur effect, an input image is captured from a camera set as a short exposure time under a dim light condition. Then we propose a method to reproduce color tone of the dim input image. To this end, color variation characteristics which represent color variations of a digital camera are first extracted by analyzing the Macbeth color checker images taken under various exposure values. Then, a color reproduction is performed by an estimation based on the color variation characteristics. Experimental results have shown that the proposed method has achieved better performance of color reproduction, compared with existing methods.

• 대한물리의학회지
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• 제10권3호
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• pp.9-17
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• 2015

PURPOSE: This paper aims to present the available angle to evaluate the severity of forward head posture (FHP) with the observation method and photographic method. METHODS: A cross-sectional observation research design study consisted of 29 subjects who was divided two groups (slight FHP group, moderate FHP group) in Eulji university was used. We evaluated the FHP and the angles including CranioVertebral Angle (CVA), Head Tilting Angle (HTA), Head Position Angle (HPA) and Forward Shoulder Angle (FSA) with the Body style S-8.0 (South Korea, LU Commerce). RESULTS: The mean of CVA, FSA from the slight FHP group was shown higher than moderate severe FHP group. According to independent t-test result, but there was no difference among all angles in two groups. The linear discriminate analysis showed the size of distinction of FSA was the biggest, and then CVA, HTA and HPA were in the order. 55.6% of FSA is properly classified in the slight FHP group. CONCLUSION: The FSA is the best to distinguish the severity of FHP and then CVA as the second best. Therefore, FSA is recommended to check the FHP.

• 한국인터넷방송통신학회논문지
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• 제11권4호
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• pp.187-194
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• 2011

본 논문에서는 JPEG(Joint Photographic Experts Group)영상 디코더에서 영상데이타를 디코딩하는 기술에 관한 것으로, 종래의 정지영상 처리기에서는 허프만 코드화 처리를 하여 제1영상을 부호화한후 분할기반 부호화 방식의 연속영상 처리기법을 사용하였으나 작은화면의 코드화시에도 많은 계산 알고리즘이 필요하고 이미지의 닮음정도를 객관적수치로 표현할 수 없어서 비슷한 이미지를 중복 코드화 및 전송 작업을 하는 결함이 있었다. 본 논문에서는 이를 해결하기 위하여 이미지의 닮음정도를 수치화하고 기준값 이하의 영상은 코드화 작업을 하지않고 계산된 영상 변화값에 의해 구현된 영상으로 대체하여 저장 및 전송하도록 저장용량의 감축 및 시각적으로 전혀 거부감이 없는 정지영상을 구현하였다.

• Journal of Photoscience
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• 제3권3호
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• pp.159-161
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• 1996

Photosensitivity of silver halide emulsion depends on the properties of the microcrystals. Size, shape, grain distribution and chemical composition as well as the inner structure or the topography of the latent image specks affect on the optical properties and play an important role in the photographic process. In the present paper, a study on the sensitization of emulsion containing AgBrClI core/shell grains showed that for the given size, shape, halide content and crystal habit, under the optimal conditions the photosensitivity of the heterojunction type grains are different from that of the common regular grains. The optimal photosensitivity was obtained at the iodide content of 2.0 mo1%.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2009년도 9th International Meeting on Information Display
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• pp.1158-1159
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• 2009

Tri-stimulus values of CIE-XYZ and RGB values obtained by photographic film, CCD camera or scanner depend on the spectral sensitivity of imaging devices and the spectral radiant distribution of the illumination. It is important to record and reproduce the reflectance spectra of the object for true device independent color reproduction and high accurate recording of the scene. In this paper, a method to record the reflection spectra of the object is introduced and its application to spectral endoscopes is presented.

• 한국정보보호학회:학술대회논문집
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• 한국정보보호학회 1994년도 종합학술발표회논문집
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• pp.193-202
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• 1994

In this paper, we investigate possible scrambling methods for the JPEG(Joint Photographic Export Group) still image compression standard. In particular, we compare the conventional line rotation and line permutation methods to the DCT block scrambling in terms of the number of bits to be increased and the easiness of buffer control. Computer simulation results show that the DCT block scrambling method is suitable for both data security and buffer control in one-chip JPEG applications.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2005년도 추계학술대회 논문집 전기기기 및 에너지변환시스템부문
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• pp.89-91
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• 2005

In This paper the convertor topology using single diode bridge rectifier for the now two-phase switched reluctance motor is proposed. The single diode bridge rectifier is supplied by the Ac voltage source. The nonlinear model of two-phase SRM is implement by maxwell and result show the photographic.

• 한국측량학회:학술대회논문집
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• 한국측량학회 2007년도 춘계학술발표회 논문집
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• pp.161-164
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• 2007

The paper studies in the wide-angle lens and distortion tendency and employs the correction techniques suitable to the fish-eye lens using the existing photographic survey methods. After carrying out the calibration of the the fish-eye lens, we calculated the correction parameters, and then developed the method that convert the original image-point to new image-point correcting distortion. The objectives of suggested calibration method in this paper are to calibrate the image of the the fish-eye lens used in the computer-vision and the control-instrumentation field widely. The proposed technique expects to improve the accuracy of the image of the fish-eye lens in the indoor tracking and monitoring field. Also the referenced cross point auto-extraction program is embodied for improving efficiency of the lens correction techniques. Consequently, this calibration method would be applied to the automated distorting correction method on not only the fish-eye lens also general lens.

• 펄프종이기술
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• 제41권5호
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• pp.38-43
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• 2009

A conservation corrugated box for storing document archives was developed. The specifications of the double-walled E-flute corrugated conservation box were modified from those of the Library of Congress, USA. The Photographic activity test (PAT) of ISO 18916 was used to ensure protection of the archival contents from adverse effects of the container itself. Accelerated aging was conducted to evaluate the conservative properties of the box components. Atomic force microscopy was also used to evaluate changes in the cellulose surface due to accelerated aging.