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- 저자 : 김종민 ( Jong-Min Kim ) (검색결과 1,078 건)
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사각형 특징 기반 분류기와 클래스 매칭을 이용한 실시간 얼굴 검출 및 인식
김종민(Jong-Min Kim),강명아(Myung-A Kang) 한국콘텐츠학회 2010 한국콘텐츠학회논문지 Vol.10 No.1
본 논문은 사각형 특징 기반 분류기를 제안하여 실시간으로 얼굴 영역을 검출하며, 계산의 효율성과 검출 성능을 동시에 만족시키는 강인한 검출 알고리즘을 구현하고자 한다. 제안한 알고리즘은 특징 생성, 분류기 학습, 실시간 얼굴 영역 검출의 세 단계로 구성된다. 특징 생성은 제안된 5개의 사각형 특징으로 특징 집합을 구성하며, SAT(Summed-Area Tables)를 이용하여 특징 값을 효율적으로 계산한다. 분류기 학습은 AdaBoost 알고리즘을 이용하여, 분류기를 계층적으로 생성한다. 또한 중요한 얼굴 패턴은 다음 레벨에 반복적으로 적용함으로써 우수한 검출 성능을 가진다. 실시간 얼굴 영역 검출은 생성된 사각형 특징 기반 분류기를 통해, 빠르고 효율적으로 얼굴 영역을 찾아낸다. 또한 얼굴 영역을 검출한 영역을 인식의 입력 영상으로 사용하여 PCA 와 KNN 알고리즘을 이용하여 기존의 매칭 방법인 Point to point 방법이 아닌 Class to Class 방식을 이용하여 인식률을 향상시켰다. This paper proposes a classifier based on rectangular feature to detect face in real time. The goal is to realize a strong detection algorithm which satisfies both efficiency in calculation and detection performance. The proposed algorithm consists of the following three stages: Feature creation, classifier study and real time facial domain detection. Feature creation organizes a feature set with the proposed five rectangular features and calculates the feature values efficiently by using SAT (Summed-Area Tables). Classifier learning creates classifiers hierarchically by using the AdaBoost algorithm. In addition, it gets excellent detection performance by applying important face patterns repeatedly at the next level. Real time facial domain detection finds facial domains rapidly and efficiently through the classifier based on the rectangular feature that was created. Also, the recognition rate was improved by using the domain which detected a face domain as the input image and by using PCA and KNN algorithms and a Class to Class rather than the existing Point to Point technique.
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김종민(Jong-min Kim),이승로(Seungro Lee),하영철(Young-cheol Ha),이성민(Sung-Min Lee),이창언(Chang-Eon Lee) 대한기계학회 2010 대한기계학회논문집B Vol.34 No.8
본 연구는 등가가스를 이용하여 다양한 조성의 천연가스에 대한 부분예혼합 가스기기의 호환성 판정법을 실험을 통하여 검토 제시하였다. 본 판정법을 위해, 가정용 가스레인지를 이용 등가가스와 천연가스의 화염을 비교하였으며, 화염의 부상 및 불완전연소에 대해 측정을 하여 KS 규격과 비교하였다. 그 결과, 등가가스와 천연가스의 화염은 화염길이, 화염색, 화염모양 등의 차이가 거의 없었다. 또한 화염의 부상 발생은 웨버지수 51 MJ/㎥ 이상에서 안정함을 보였으며, 불완전 연소지수의 경우, 웨버지수 56.3 MJ/㎥에서 CO 농도가 95~100 ppm 정도를 보여주었다. 결과적으로 천연가스에 대한 화염의 부상과 불완전연소에 대해 호환 범위를 웨버지수 51~56.3 MJ/㎥로 제안하였으며, 이 범위 내의 천연가스는 국내 가정용 부분예혼합 가스기기에 대해 호환 가능하다는 의미이다. The estimation method of the interchangeability in a partial premixed appliance about various compositions of natural gases using equivalent gases, experimentally. The results of the experiment in which equivalent gases were used compared with those obtained in experiments in which natural gases were used; Images of flames, lift-off limits, CO emissions, and incomplete combustion indices in KS standard for the domestic gas range were considered. From the comparison, it was observed that the length and color of the flame of the equivalent gases were almost the same as those of imported natural gases. Further, in the case of gases with Wobbe indices greater than 51 MJ/㎥, the KS standard for lifting limits was satisfied. Furthermore, in the case of gases with Wobbe indices less than 56.3 MJ/㎥, the CO mole fractions are in the range 95?100 ppm. Hence, the range of Wobbe indices 51?56.3 MJ/㎥ was proposed to be the range for interchangeability from the points of view of lifting limits and incomplete combustion, as prescribed in the domestic gas range in the case of imported natural gases.
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Micro-EDM을 이용한 마이크로 채널 가공에 관한 연구
김종민(Kim Jong-min),Sharavsambuu Battseren,홍민성(Hong Min-sung) 한국생산제조학회 2010 한국공작기계학회 추계학술대회논문집 Vol.2010 No.-
Recently, there are increasing interests on micro shape machining according to miniaturization trend of the industrial products. Especially, micro machining technologies such as machining micro holes and micro channels have been developed for various industries such as optical and medical instruments, etc. Among them, micro electrical discharge machining(EDM) is advantageous for machining of the hard material as it has a feature to transcribe shape of a tool as it is, and has superior quality of machined surface comparing to other special machining method as the material is removed at an atom unit. In addition, it shows unsability for fabricating micro diaphragm or channel due to such machining characteristics. This study has carried out effects on machining speed and surface roughness from changes of various machining factors such as spindle speed and polarity in order to find characteristics of micro electrical discharge machining process.
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현장시험시공을 통한 폐기물매립지반의 지오셀 보강효과분석
김종민(Kim Jong-Min),박이근(Park Lee-Keun),오영인(Oh Young-In),이광수(Lee Gwang-Soo) 한국토목섬유학회 2010 한국지반신소재학회 학술발표회 Vol.2010 No.4
Many industrialized countries of the world have many problems about the reuse of waste landfill area because the increase of terminated waste disposal landfill. Especially, the effective use of the terminated waste landfill nearby the urban area has been demanded, because of the lack of the usable land. However, the reuse of terminated waste landfill is needed an adequate stabilization of ground for increasing the bearing capacity and reduce the allowable settlement for the given structure. This study is to evaluate the reinforcement effect of geocell for the increment of bearing capacity of solid waste landfill ground. The in-situ plate loading tests were performed to determine the static behaviors of reinforced ground with geocell. Three series of test were conducted with variations of ground condition and geocell reinforcement. Based on the in-situ plate load test results, the bearing capacity of geocell-reinforced ground gives 1.53 times higher value than un-reinforced ground.
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탄소나노튜브/에폭시 나노 복합소재 스트레인 센서의 계측 연구
김종민(Jong Min Kim),강인필(Inpil Kang) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.11
This paper studies characteristics of carbon nanotube (CNT) composite sensor. The sensor was made of multi-wall carbon nanotube(MWCNT) with epoxy nanocomposite (3 wt%) by using piezoresistivity of the composite. For signal processing of the sensor, signal processing system was developed with the circuit consisted of voltage divider and signal processor. The characteristics of the sensor were studied by its static and dynamic responses. An experimental strain model of the sensor was obtained and response time of the strain sensor was measured under strain deflection as well. For dynamic strain sensing characteristic, the sensor was tested by free vibration response. The characteristics of MWCNT/epoxy strain sensor was compared with foil type strain gauge. From this experimental study, the composite sensor showed fairy good response and it is expected to be a promising strain sensor for mechanical applications.
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