SVM 결정법칙에 의한 얼굴 및 서명기반 다중생체인식 시스템

민준오,이대종,전명근,Min Jun-Oh,Lee Dae-Jong,Chun Myung-Geun 한국정보처리학회 2004 정보처리학회논문지B Vol.11 No.7

본 논문에서는 SVM에 기반을 둔 결정법칙에 의해 얼굴인식과 서명인식시스템으로 구성된 다중생체인식시스템을 제안하고자 한다. 이를 위해 퍼지 선형판별기법(Fuzzy Linear Discriminant Analysis : Fnzzy LDA)를 이용한 얼굴인식과 선형판별분석기법과 구간매칭기법을 이용한 서명인식을 구축하였다. 두 개의 단일생체인식시스템을 효과적으로 융합시키기 위해 우선 독립적인 두 개의 생체인식시스템에 의해 산출된 매칭도로부터 등록자(Genuine)와 침입자(Impostor)의 확률 분포 모델을 생성한 후, SVM(Support Vector Machine)에 의해 최종 인증하는 구조로 되어있다. 제안된 방법인 SVM기반 결정법칙을 적용하여 실험한 결과 기존에 결정법칙으로 많이 사용되고 있는 가중치합과 결정트리 방식에 비해 각각 $1.654{\%}$와 $3.3{\%}$의 인식률 향상을 나타내 제안된 방법의 우수성을 나타냈다. In this paper, we propose a multi-modal biometrics system based on face and signature recognition system. Here, the face recognition system is designed by fuzzy LDA, and the signature recognition system is implemented with the LDA and segment matching methods. To effectively aggregate two systems, we obtain statistical distribution models based on matching values for genuine and impostor, respectively. And then, the final verification is Performed by the support vector machine. From the various experiments, we find that the proposed method shows high recognition rates comparing with the conventional methods.

하계 한반도 해역(동해, 서해, 남해 및 동중국해)의 하위영양단계 먹이망 구조 : 탄소 및 질소 안정동위원소 활용

민준오,이창화,윤석현,Min, Jun-Oh,Lee, Chang-Hwa,Youn, Seok-Hyun 해양환경안전학회 2020 해양환경안전학회지 Vol.26 No.5

본 연구는 2019년 8월 한반도 주변해역(동해, 서해, 남해, 동중국해)에서 탄소 및 질소 안정동위원소 기법을 활용하여 하위영양 단계에서의 먹이망 구조를 파악하였다. 입자성 유기물(POM)의 δ¹³C 범위는 -26.18 ~ 20.61 ‰, δ¹⁵N 범위는 5.36 ~ 15.20 ‰의 넓은 범위를 보였다. POM과 각 생물별 개체군 사이의 δ¹³C 분별작용의 결과는 대부분 micro-POM을 섭식하는 것으로 확인하였으나 해역 간 차이를 보였다. 각 생물별 영양단계는 chaetognaths (3.40±0.61)가 가장 높은 영양단계에 있음을 확인하였다. 동위원소 혼합모델을 적용한 결과에서 chaetognaths의 먹이원으로 copepods (13 ~ 48 %)와 euphausiids (20 ~ 51 %)가 가장 높은 기여도를 나타냈다. 본 연구결과 각 해역별 먹이원의 제한적 공급 및 다양성의 차이가 먹이망 구조 및 각 생물별 동위원소 비에 영향을 미친 것으로 판단된다. Food web structures in the lower trophic levels of the seas around the Korean peninsula were investigated in August 2019 using stable isotopes. There were variable ratios of the carbon (-26.18 ~ -20.61 ‰) and nitrogen stable (5.36 ~ 15.20 ‰) isotopes in the particulate organic matter (POM). Most of the organisms ingested micro-POM as a major food source, but this varied spatially. The chaetognaths (3.40 ± 0.61) occupied the highest trophic level. The isotope mixing model showed that the proportions (13 ~ 51 %) of some organisms (i.e., copepods and euphausiids) reflected the relative contributions as major food sources for chaetognaths at each site.

웨이블렛 변환과 LDA를 이용한 얼굴인식

민준오(Jun-Oh Min),고현주(Hyoun-Joo Go),전명근(Myung-Geun Chun) 한국지능시스템학회 2003 한국지능시스템학회 학술발표 논문집 Vol.13 No.2

보분: 섬진강 하구역의 계절별 일차생산력 및 식물플랑크톤 색소 조성 변화

민준오 ( Jun Oh Min ),하선용 ( Sun Yong Ha ),정미희 ( Me Hee Chung ),최보형 ( Bo Hyung Choi ),이연정 ( Yeon Jung Lee ),윤석현 ( Seok Hyun Youn ),윤원득 ( Won Duk Yoon ),이재성 ( Jae Seong Lee ),신경훈 ( Kyung Hoon Shin ) 한국하천호수학회 2012 생태와 환경 Vol.45 No.2

Four in situ incubation experiments were conducted in May, August and November 2009, as well as February 2010 to determine the seasonal primary productivity and the community structure of phytoplankton at the Seomjin estuary. The primary production of phytoplankton ranged from 9 to 3560 mgC m-2 d-1. Primary productivity was the highest in the summer season (August), which was influenced by improved optical and temperature conditions of the water, as well as the supply of nutrients derived from its surrounding watershed. Particularly, the upper station (SJ-1, SJ-2) of Seom-jin estuary showed a higher productivity, as a result of inflow of input nutrients originated from the terrestrial source. The fucoxanthin, as an index pigment of diatoms showed the highest concentration (0.74~9.51 μg L-1) at all stations, occupying 30~80% to total Chl a concentrations. The phytoplankton species composition determination, using a microscope showed similar results to the pigment analysis, which indicated diatom Skeletonema costatum, as the dominant species. The primary productivity in Seom-jin estuary indicates temporally and spatially large variation, according to different environmental conditions. Also, Skeletonema costatum has euryhaline features with relatively higher contribution.

보문 : 하계 강우기 섬진강 하구역의 일차생산력 및 식물플랑크톤 색소조성 변화

민준오 ( Jun Oh Min ),하선용 ( Sun Yong Ha ),최보형 ( Bo Hyung Choi ),정미희 ( Mi Hee Chung ),윤원득 ( Won Duk Yoon ),이재성 ( Jae Seong Lee ),신경훈 ( Kyung Hoon Shin ) 한국하천호수학회(구 한국육수학회) 2011 생태와 환경 Vol.44 No.3

Field observations and culture experiments have been carried out during the rainy season (on the 6th, 8th and 27th July 2009) to examine changes in the primary productivity and associated plant pigments in the estuary of the Seom-jin River. Primary productivity was determined at four sampling stations along the salinity gradient. On 6th July (before heavy rain) primary productivity ranged from 689~1,169 mgC m-2 d-1. On the 8th, just after more than 216.5 mm of precipitation, euphotic layers at all stations were reduced to very shallow water because of the high concentration of suspended solids in the water. This resulted in dramatically decreased primary productivity down to as low as 12~32 mg C m-2 d-1. However, after the rain, primary productivity on the 27th ranged from 266~999 mgC m-2 d-1, demonstrating a fast recovery in the upper stream water to similar productivity levels to those before the rainy season. Concentration of fucoxanthin in the water was highest on the 6th July. Before the rain, concentration of the zeaxanthin, increased as the salinity decreased. Immediately after the heavy rain, the Chl b (Chlorophytes) concentration was higher at all sites than before the rainy season. The concentration of fucoxanthin decreased after the heavy rain. At the downstream site, peridinin (Dinoflagellates) were found. During the rainy season, the diatoms contributed to the primary productivity at all sites. However, after the rainy season, Chl b (Chlorophytes) and Peridinin (Dinoflagellates) increased, demonstrating the enhanced contribution of those species in addition to diatoms.

보문 : 영산강 하구역 및 목포 연안 해역 식물플랑크톤 1차생산력의 시,공간적 변화

이연정 ( Yeon Jung Lee ),민준오 ( Jun Oh Min ),신용식 ( Yong Sik Shin ),김성환 ( Sung Hwan Kim ),신경훈 ( Kyung Hoon Shin ) 한국하천호수학회(구 한국육수학회) 2011 생태와 환경 Vol.44 No.4

Temporal and spatial variations of primary productivity were investigated in the estuary of Youngsan River and Mokpo coastal areas in 2009. After heavy rain, concentrations of ammonium, phosphate, and silicate increased at six stations in August. The torrential rainfall may cause an increase in untrient concentrations during summer. There is no limitation of nutrients(except for February at the mid-Youngsan estuarine region YS2)but a potential phosphate limitation was apparent at all stations. Silicate depletion was observed at YS2 in February due to a massive diatom bloom. The trophic status of the Youngsan estuary and Mokpo coastal areas were inferred from an assessment of the primary productivity. In February and May, YS1(upper Youngsan estuary site) and YS2, YS3(near the Youngsan river estuary barrage), MP1 (upper Mokpo coastal region site) were appropriately assigned to the mesotrophic category. MP2(mid-Mokpo coastal region site) and MP3(outer site of Mokpo coastal region) were assigned to the oligotrophic category. All stations were classified to the oligotrophic status in November. In August, after heavy rain, Youngsan estuary stations maintained mesotrophic status. On the ofter hand, Mp1 and MP2 were classified in the eutrophic category and MP3 to mesotrophic status. In Particular, primary productivities of MP1 and MP2 were 9 and 7 times higher respectively than the standard of eutrophic status(1,000-mgC m-2 d-1). These results suggest that a massive freshwater discharge from the Youngsan River estuary should be considered a Main factor in the occurrence of phytoplankton bloom in Mokpo coastal areas during summer. Seasonal variations of primary productivity are closely related with depth-integrated Chl.a.