• 대한방사선기술학회지:방사선기술과학
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• 제1권1호
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• pp.55-59
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• 1978

The photographic characteristics have been studied in relation with various molecular weights of Polyvinylpyrrolidone(PVP). The shape of silver halogen crystals by physical ripening of mixture of photographic gelatine and various molecular weights of PVP were observed. Then, the photographic characteristics have been studied by chemical ripening. Results were concluded as follows: 1. All of the crystals have formed in the shape of (100) or (111). 2. Photographic characteristics were inferior by using PVP of higher molecular weight. 3. Photographic characteristics were superior by using PVP of lower molecular weight. 4. Photographic characteristic were compared with various Emulsion thickness and Tested Resolving power.

• 정보학연구
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• 제8권3호
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• pp.51-56
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• 2005

In this paper, we describe a study on the relationship between spectral sensitization and photographic characteristics of color paper. The photographic emulsion used in this study is a green-sensitizing emulsion. U.V maximum absorption peak value of 9-phenyl-5,5'-diphenyl-3,3'-bis(3-sulfopropyl)benzoxazolo carbocyanine triethyl ammonium salt was observed 507nm, and wedge spectrograms maximum peak value of color paper added dye to photographic emulsion was shown 553nm. As compared with the absorption peak of the dye in methanol solution, the sensitizing peaks of 9-phenyl-5,5'-diphenyl-3,3'-bis(3-sulfopropyl)benzoxazolo carbocyanine triethyl ammonium salt have red shifts of 46nm. The photographic characteristics of green-sensitizing emulsion were obtained contrast(2.6), speed(48-57), fog(0.08). Therefore, benzoxazolo carbocyanine dye is of industrial importance as green-sensitizing dye in the spectral sensitization of photographic emulsion.

• 한국응용과학기술학회지
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• 제13권1호
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• pp.87-98
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• 1996

In this study, benzoxazolo carbocyanine dye was used as sensitizer for photographic emulsion, and the photographic characteristics were examined. The basic properties of sensitizer such as stability in various solvents were examined. The sensitizer was very stable in methanol, acetonitrile, acetone, dimethylformamide, and chloroform solution. Absorption spectra of benzoxazolo carbocyanine dye $2.5{\times}10^{-6}M$ and $5{\times}10^{-6}M$ concentrations in 10% aqueous methanol solutions containing $10^{-2}M$ potassium chloride show the monomer-J-aggregation characteristics. Compared to the absorption peak of the monomer in pure methanol solution, the red shifts of the monomer-J-aggregate peaks of benzoxazolo carbocyanine dye of $2.5{\times}10^{-6}M$ and $5{\times}10^{-6}M$ concentrations in 10% aqueous methanol solutions containing $10^{-2}M$ potassium chloride are 34nm respectively, and the sensitizing peak of benzoxazolo carbocyanine dye in photographic emulsion has red shift of 34nm. Therefore, if was concluded that benzoxazolo carbocyanine dye can be used as green sensitizing dye for the spectral sensitization of photographic emulsion.

• 한국응용과학기술학회지
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• 제20권4호
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• pp.366-371
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• 2003

In this paper, it was studied about the red-sensitive layer. UV-Vis data of the dye at monomeric and J-state were considered with respect to their performance(contrast, speed, density and fog) in photographic emulsion. The sensitizing effect of the dye is found to be strongly structure-dependent. Naphthctbiazolo carbocyanine dye can be used as red sensitizing dye for the spectral sensitization of photographic emulsion.

• Journal of Photoscience
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• 제3권2호
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• pp.65-69
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• 1996

In this paper, it was studied about the red-sensitive layer. UV-Vis data of the dye at monomeric and J-state were considered with respect to their performance(contrast, density and fog) in photographic emulsion. The sensitizing effect of the dye is found to be strongly structuredependent. Naphthothiazolo carbocyanine dye can be used as red-sensitizing dye for the spectral sensitization of photographic emulsion.

• 한국응용과학기술학회지
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• 제16권3호
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• pp.199-203
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• 1999

The symmetric benzoxazolo carbocyanine is of industrial importance as green-sensitizing dye in the spectral sensitization of emulsion microcrystals in positive paper and negative film-making. The stability on the solvents of benzoxazolo carbocyanine dye was measured by UV-Vis spectrophotometer, and then all of solvents were stabilized sensitizer. The maximum absorption peak range in methanol, acetonitrile, acetone, DMF, dichloromethane, chloroform solvents was $501nm{\sim}511nm$. But it was identified that only methanol can be used to photographic emulsion. The photographic characteristics have contrast of 2.8, speed of 50-55$(lux{\cdot}sec)^{-1}$, fog of 0.07-0.08, respectively.

• 한국기록관리학회지
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• 제9권2호
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• pp.79-102
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• 2009

19세기에 발명된 이래 대표적인 이미지 기록 수단으로 사용되어온 사진은 사회의 전 분야에 대한 시각적인 정보를 제공한다. 이러한 시각적 자원을 이용하기 위해서는 사진매체의 특성을 반영한 체계적인 관리가 선행되어야 한다. 국내에 생산 및 축적되어 있는 방대한 양의 사진을 수집하고 관리하기 위해서는 평가업무가 우선적으로 수행될 필요성이 있다. 평가는 기록이 지닌 의미와 가치를 판단하는 작업으로, 지속적 가치를 가지는 대상을 선별하기 위해서는 합리적인 평가기준이 필요하다. 이에 본 논문에서는 기록학의 평가선별론의 이론적 구조와 사진의 특성을 기반으로 한 사진기록의 평가기준을 제안하고자 했다. 이를 위해 문헌연구를 중심으로 먼저 사진기록의 개념, 가치 및 평가에 있어서의 특수성에 관한 논의를 정리했다. 다음으로 개별적인 기록의 평가에 이용되는 기존의 평가기준과 사진기록의 평가에 관한 논의에서 제기된 평가기준을 분석했다. 마지막으로 이러한 분석을 바탕으로 사진기록의 평가영역을 범주화하여 설계하고 각 영역별로 평가요소를 제시했다.

• 정보학연구
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• 제8권2호
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• pp.53-58
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• 2005

In this study, we made experiments the preparation of silver halide microcrystals, physical ripening, chemical ripening, spectral sensitivity, additives and coating in order to develop medical laser scanner film which has photographic characteristic suitable for exposure to He-Ne and Ar laser. In the practice of sensitometry, the photographic material is exposed to a known quantity and quality of radiant energy, developed under standard conditions, and the densities resulting from the various exposures are then measured. The results are usually expressed in graphic form as curves, and from these curves numerical values are derived which are used to specify the characteristics of the material.

• 기록학연구
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• 제79호
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• pp.471-513
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• 2024

장준하가 창간한 『사상계(思想界)』(1953년~1970년)는 당시 권위주의 정부를 정면으로 비판하며 한국 사회의 지성인을 대변했던 월간 시사교양지다. 『사상계』는 다양한 시사 주제를 사진화보로 제작하여 사진을 뉴스밸류를 갖는 시각적 도구로 활용했다. 본 논문은 이러한 『사상계』의 사진화보를 기록물로 바라보고 그 가치를 고찰하고자 한다. 가치 평가에 앞서 『사상계』 사진화보의 전개과정과 특징을 전반적으로 살펴보았다. 그리고 사진화보가 담고 있는 주제를 본문 내용 구분을 기준으로 정치, 경제, 사회, 문화면 및 기타로 나눈 뒤 대표 화보를 소개했다. 기록학적 관점으로 사진을 바라보는 것이란, 사진이 단순 데이터 그 이상의 의미를 갖고 있음을 확인하는 과정이다. 『사상계』 사진화보는 1960년대 사회를 증거하며 주요 시각정보를 담고 있는 사진기록물이다. 또한 『사상계』 사진화보는 한국 잡지 기록사진(다큐멘터리사진)의 측면에서 사진사적 의미를 갖는다. 본 논문을 통해 『사상계』의 사진화보가 미술사의 분과 학문의 사진사적 가치를 갖고 있을 뿐만 아니라 사진기록물로서 기록학적 차원의 증거적, 정보적 가치를 충실하게 갖춘 한국 현대사회의 기록 유산임을 밝히고자 한다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2008년도 학술대회 논문집 정보 및 제어부문
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• pp.153-154
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• 2008

Digital photographic analysis is currently considered as a routine procedure in clinic because periodic follow-up examinations can provide meaningful information for diagnosis. However, it is impractical to separately evaluate all suspicious lesions with conventional digital photographic systems, which have inconsistent characteristics of the environmental conditions. To address the issue, it is necessary for total diagnostic evaluation in clinic to integrate conventional systems. Previously, a multimodal digital photographic imaging system, which provides a conventional color image, parallel and cross polarization color images and a fluorescent color image, was developed for objective evaluation of facial skin lesions. Based on our previous study, we introduce a commercial product, "DermaVision-PRO," for routine use in clinical application in dermatology. We characterize the system and describe the image analysis methods for objective evaluation of skin lesions. In order to demonstrate the validity of the system in dermatology, sample images were obtained from subjects with various skin disorders, and image analysis methods were applied for objective evaluation of those lesions.