• Journal of KIISE:Computing Practices and Letters
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• v.7 no.6
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• pp.724-732
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• 2001

In this paper, a new method of feature extraction of major objects to represent an image using Vector Quantization(VQ) is proposed. The principal features of the image, which are used in a content-based image retrieval system, are color, texture, shape and spatial positions of objects. The representative color and texture features are extracted from the given image using VQ(Vector Quantization) clustering algorithm with a general feature extraction method of color and texture. Since these are used for content-based image retrieval and searched by objects, it is possible to search and retrieve some desirable images regardless of the position, rotation and size of objects. The experimental results show that the representative feature extraction time is much reduced by using VQ, and the highest retrieval rate is given as the weighted values of color and texture are set to 0.5 and 0.5, respectively, and the proposed method provides up to 90% precision and recall rate for 'person'query images.

• Proceedings of the Korean Information Science Society Conference
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• 1999.10b
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• pp.530-532
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• 1999

백혈구는 형태상으로 임파구, 중성구, 반핵구 등 7~8 종의 정상적인 백혈구 종류가 있으며 비정상적인 백혈구는 변형으로 인하여 수 십 가지가 되어 분류시 많은 어려움이 있다. 백혈구는 질환에 대한 많은 정보를 가지고 있어 질병 유무 및 상태 판단에 절대적으로 필요한 검사로서 현재는 전문가에 의해 백혈구 크기, 색상, 내부 핵유무, 핵의 모양 및 boundary 모양 등을 개인적 판단 기준으로 검사하고 있어 많은 어려움이 있다. 이에 질환별 백혈구 형태 분류 알고리즘과 이에 따른 백혈구 영상 정보 확보 및 검색 시스템을 설계 구현하였다.

• Proceedings of the Korea Multimedia Society Conference
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• 2001.11a
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• pp.596-601
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• 2001

본 논문에서는 두 대의 카메라로부터 입력받은 인간의 신체와 같은 관절체의 움직임을 Color Marker의 색상 특성을 이용하여 3차원 공간 정보를 인식하는 방법에 관해 기술한다. 이 방법은 인체에 물리적인 장치를 하지 않고 단순히 영상정보만을 이용하여 3차원 정보를 구하였다. 보다 정확한 인체의 특징점을 구하기 위해 환 논문에서는 신체의 관절각에 칼라 마커를 부착하고 칼라 마커틀을 세그먼트하여 관절각의 2차원 정보를 구한 다음 스테레오 기하(Stereo Geometry)를 이용하여 3차원 정보를 계산하고 가상 공간상에서 인간의 움직임을 추적하는 방법을 제안한다. 제안하는 방법은 제스쳐 인식과 3차원 Virtual Reality 인터페이스 시스템 구성 등에 사용될 수 있다.

• Proceedings of the Korean Institute of Communication Sciences Conference
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• 2006.07a
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• pp.451-451
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• 2006

• Journal of Biosystems Engineering
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• v.17 no.4
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• pp.382-395
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• 1992

The surface color of several varieties of apples were expressed quantitatively in xyz chromaticity coordinates. The spectral reflectance of 'Fuji' apples were measured in 400-820 nm range by using a spectrophotometer. Based on the spectrophotometer data and the result of visual sensory test, linear regression models were developed to select wavelengths effective for sorting apples. The models utilized reflectance at single wavelength, and the difference and ratio of the reflectance at two distinct wavelengths. The model which best fitted the visual sensory test data was one utilizing the ratio of the reflectance at 618 nm and 514nm. The correlation coefficient for this model was 0.967. Several other models were also described.

• Journal of Biosystems Engineering
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• v.18 no.4
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• pp.382-389
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• 1993

In this research, the surface color of 'Fuji' apples and tomatoes were measured by using Sharp PD 151 semiconductor color sensors. The measurements were compared with color-difference-meter readings and with visual sensory test scores. A negative exponential function was developed which describe the relationship between the dominant wavelength of the surface color of 'Fuji' apples and the ratio of the photoelectric currents of the color sensor. Also a linear relationship was found for the surface color of tomatoes and the color sensor output. There were good correlations between the visual test scores and the color sensor output for both 'Fuji' apples and tomatoes.

• Proceedings of the Korean Society of Dyers and Finishers Conference
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• 2009.11a
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• pp.41-42
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• 2009

천연가죽 제조 공정에서 유해성 금속성 성분인 크롬이 전혀 함유되지 않은 비크롬 가죽을 제조한 후에 염색 공정에서 다색성 염료인 오배자와 소목을 각각 원료피 무게대비 5%를 사용하고, 매염제를 2~3% 사용하여 염료의 흡착성 증대, 음이온성 가지제 10~12%를 사용하여 가죽에 유연성 및 매염제의 표면 흡착성 증대를 통해서 천연염료에는 존재하지 않는 블랙색상의 가죽을 제조하였다.

• Proceedings of the IEEK Conference
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• 2006.06a
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• pp.727-728
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• 2006

In this paper, we analyzed the color restoration method to be used in the Multi-Scale Retinex and proposed new color restoration method. and, we compared the result of the algorithm to be proposed with conventional algorithm through the experiment.

• Proceedings of the Korean Institute of Surface Engineering Conference
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• 2009.10a
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• pp.147-147
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• 2009

Shadow mask는 OLED의 R-G-B 컬러를 구현하기 위한 유기화합물을 증착하는데 사용하는 금속막으로 수없이 많은 홀이 뚫려있고 디스플레이의 화질, 선명도 및 색상을 좌우하는 핵심적인 소모성 부품이다. 하지만 증착공정시 발생되는 열에 의해 홀의 치수변화가 발생되기 때문에 이를 방지하기 위하여 본 연구에서는 열팽창에 치수변화가 없는 인바소재를 이용하여 Shadow mask를 제조하였다.

• Journal of the Institute of Electronics Engineers of Korea CI
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• v.40 no.6
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• pp.47-55
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• 2003

In this paper, we propose a new approach to detect peculiar features of license plates using intensity vector and composite color component in order to extract license plates from parking regulation images, which is captured in various locations around the front or the rear of cars at various times and places, and in which complex background is included. We fundamentally use both features that intensity value repeats frequently increasing and decreasing because intensity is obviously different at numerics and background, and that color is uniform in the area of license plates. First, we search each row at regular intervals starting from the bottom of a license-plate image, and we set up a rough region for a certain zone in which tile sign of intensity vector changes frequently enough and color of license plate is detected enough, assuming it as a candidate location of a license plate. And then, we extract an elaborate area of a license plate by projecting vertical edges horizontally and vertically. Here, type of cars, such as the urinate and the public, is easily classified according to the color of extracted plates. We used 200 actual regulation images, which are captured at various times and places, to evaluate the performance of the proposed method. As a result, the proposed method showed extraction rate of 96%, which is 9% higher than the previous method using only intensity vector.