• 한국정보통신학회논문지
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• 제8권3호
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• pp.714-720
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• 2004

얼굴검출 작업에서 다양한 형태를 가지는 후보영역을 정사하기 위한 기하학적 연산과정이 수반된다. 본 논문에서는 컬러영상에서 색도 분포 특성을 이용함으로써 얼굴가림과 방향에 영향을 받지 않고 얼굴 유효특징점을 검출할 수 있는 알고리즘을 제안한다. 제안한 알고리즘은 얼굴의 특징점 주변에서 Cb와 Cr이 일관적인 색도차를 가진다는 점에 착안한 것으로써, 기본 색도차 영상인 Eye맵 마스크에서 특징점을 효과적으로 강조시킬 수 있는 평균-그레이 모폴로지 연산을 수행한다. 실험을 통해, 제안한 방법이 가변적 형태의 후보영역에 대해서도 강인하게 얼굴의 유효특징점을 검출할 수 있음을 확인할 수 있었다.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2003년도 춘계종합학술대회
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• pp.161-164
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• 2003

본 논문은 그레이 영상에 대해 모폴로지 기법과 스플라인 보간법을 적용하여 영상 모핑을 실현한 연구이다. 모핑기법은 모핑 할 그레이 영상을 모폴로지 기법의 팽창으로 작은 끊김을 연결하고, 홀을 제거시킴으로서 영상 경계를 부드럽게 하고, 큐빅 스플라인으로 보간하여 특징 점을 추출하는 방법을 적용하였다. 실험 결과 처리시간단축과 보다 세밀하고 자연스러운 모핑 영상의 변환이 이뤄졌다.

• 펄프종이기술
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• 제35권4호
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• pp.17-22
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• 2003

A kind of image analysis system is used to investigate the structural features of the papers made from Indian mallow. The screen mark on the paper was identified and analyzed. The dusts, shives and fiber bundles were manifested and calculated. In the aspect of Indian mallow hanji's surface characteristics analyzed by an Image analyzer, the average of gray level and its standard deviation hanji from the woody core were rather lower than of bast fiber pulp because of better sheet formation of the formers. Hower. high brightness hanji showed high value of gray level. The sheet formation and paper opacity were increased with the decrease of standard deviation of gray level. From these results, gray level measurement could be used to predict the paper opacity as well as sheet formation.

• 한국윤활학회:학술대회논문집
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• 한국윤활학회 1999년도 제30회 추계학술대회
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• pp.57-61
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• 1999

The effect of the microstructure of gray cast iron on friction properties was investigated by using a pad-on-disk type friction tester. Cast iron samples used in this investigation were obtained from "step block" castings, which were designed to produce microstructure with different graphite flake morphologies from different cooling rate and solidification rate. Results of this work showed that the gray cast iron disks with long graphite flakes showed less fading. The rotors containing smaller amounts of ferrite showed higher friction coefficient and better fade resistance than others.an others.

• 한국통신학회논문지
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• 제17권10호
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• pp.1109-1116
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• 1992

Mathematical morphology는 이론적 배경으로 신호 및 시스템의 기하학적 특성을 해석하는데 우수하고 잡음이 섞인 데이터를 고르기에 있어서 매우 성공적으로 적용되고 있다. 본 논문에서는 morphological필터의 하드웨어 구현은 같은 회로에서 gray scale dilation과 erosion을 수행하여 최소값과 최대값을 선택하도록 함으로써 회로의 복잡성을 줄이고 병렬처리가 가능하도록 하였다. Morphological filter의 구조는 structuring element블록, 이미지 데이타 블록, 제어 블록, ADD 블록, MIN/MAX블록으로 구성되고 실시간 처리가 가능하도록 하드웨어를 설계, one chip화 한다.

• 한국통신학회논문지
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• 제17권11호
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• pp.1264-1270
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• 1992

Morphological 필터는 다양한 structuring element로서 morphological 연산으로 구성된다. 두개의 기본적인 morphological 연산은 erosion과 dilation이다. 두 연산에 기본을 두고 OC, CO 필터가 정의된다. 가우시안 잡음이 포함된 이미지의 잡음을 제거할 경우 OC 필터의 성능이 CO의 성능보다 우수함을 확인하였다. 본 논문에서는 이미지 처리에 있어서 하이브리드 메디안 필터를 구성하여 다른 필터 보다 화질의 선명도를 개선하고 컴퓨터 시뮬레이션을 통하여 해석하였다.

• 한국윤활학회:학술대회논문집
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• 한국윤활학회 2002년도 제35회 춘계학술대회
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• pp.235-239
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• 2002

The objective of the experiment is to investigate the effect of microstructures of gray cast iron oil wear characteristics of automotive disc brakes. Six different gray cast iron rotors were manufactured by changing carbon equivalent and cooling rate. The change of DTV (disc thickness variation) before and after wear tests was measured to examine the wear properties according to the microstructures of gray iron discs since the DTV generation is caused by the circumferential uneven wear. Experimental results showed that the morphology of graphite flake and hardness in gray cast iron were crucially associated with the change of DTV. In particular, the DTV changes of rotor decrease when the length and area fraction of graphite flake in brake rotors increase and hardness of brake discs reduces.

• 한국균학회지
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• 제43권4호
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• pp.277-280
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• 2015

In August 2015, we collected samples of gray mold from sweet basil growing in Sachunmeon, Gangneung, Gangwon Province, Korea. Symptoms included extensive growth of mycelia with gray conidia on young leaves, stems, and blossoms. The pathogen was isolated from infected leaves and blossoms and the fungus was cultured on potato dextrose agar. For identification of the fungus, morphology and rDNA sequencing analysis of the fungus were performed, which confirmed its pathogenicity according to Koch's postulates. The results of morphological examinations, pathogenicity tests, and the rDNA sequences of the internal transcribed spacer regions (ITS1 and ITS4) and the three nuclear protein-coding genes G3PDH, HSP60, and RPB2 showed that the causal agent was Botrytis cinerea. This is the first report of gray mold caused by Botrytis cinerea on sweet basil in Korea.

• 한국동물학회:학술대회논문집
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• 한국동물학회 1997년도 한국생물과학협회 학술발표대회
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• pp.97.1-97
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• 1997

No Abstract, See Full Text

• 한국한의학연구원논문집
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• 제12권3호통권18호
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• pp.101-115
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• 2006

The purpose of this study was to introduce the differential standard of the types of Angelicae Pubescentis Radix. We established the classificatory standard according to the external and internal morphology and the physicochemistrical pattern for the four types of Aucklandiae Radix. The results follow: 1. At the external shape, Angelica pubescens f. biserrata has rising lenticel and dark brown surface, Its section is light gray and its xylem is yellow gray. Aralia continentalis has big stem mark in upper portion, its section has no dense tissue with yellow gray. Heracleum hemsleyanum has dark brown surface and little lenticel, its cortical layer is white yellow and xylem is isabella and powdered. 2. At the internal shape, Angelica pubescens f. biserrata has phloem with half of the root and rare vessel. Aralia continentalis has phloem with two-thirds of the root and it has broad cutting and putting vessel that formed 1-2 row. Heracleum hemsleyanum also has phloem with half of the root and wide scattered latex tube and many large vessel. 3. At the TLC pattern, Heracleum hemsleyanum has remarkable dark spot at $R_{f}$ 0.23 on the sulphuric acid color pattern test, but others have faint. 4. At the HPLC pattern, all samples have generally patterns. But Angelica pubescens f. biserrata shows diminutive continentalic acid content and the peak at Rt 20.278min comes out on Heracleum hemsleyanum, but do not come out on Aralia continentalis and Angelica pubescens f. biserrata. Heracleum hemsleyanum has remarkable peak at Rt 20.278min, but shows no peak at Rt 29.023min unlike Aralia continentalis or Angelica pubescens f. biserrata. Also Aralia continentalis and Angelica pubescens f. biserrata show one remarkable peak at Rt 29.023, but Heracleum hemsleyanum do not show. Consequently, Aralia continentalis and Angelica pubescens f. biserrata are comparable whit continentalic acid content and Heracleum hemsleyanum is comparable with the peak at Rt 20.273 and Rt 29.023. So it is thought that content of continentalic acid and the peaks at Rt 20.278 and Rt 29.023 can apply to differentiate a species from other. It is considered the results of this study will be furnished the basis to succeeding studies and it is needed to extensive comparative study for the same genus-degree of relatedness.