Region-based Corner Detection by Radial Projection

이대호,SeungGwan Lee,최진혁 한국광학회 2011 Current Optics and Photonics Vol.15 No.2

We propose a novel method which detects convex and concave corners using radial projection. The sum of two neighbors’ differences at the local maxima or minima of the radial projection is compared with the angle threshold for detecting corners. In addition, the use of oriented bounding box trees and partial circles makes it possible to detect the corners of complex shapes. The experimental results show that the proposed method can separately detect the convex and concave corners, and that this method is scale invariant.

인삼포지(人蔘圃地)의 토양화학성(土?化?性)이 생육(生育) 및 수량(收量)에 미치는 영향(影響)

이대호,육창수,한강완,남기열,배효원,Lee, Il-Ho,Yuk, Chang-Soo,Han, Kang-Wan,Nam, Ki-Yeui,Bae, Hyo-Won 한국토양비료학회 1981 한국토양비료학회지 Vol.13 No.4

인삼(人蔘)의 생육(生育)에 적합(適合)한 토양화학성분별 함량(含量)과 이들과 인삼(人蔘)의 생육(生育) 및 수량(收量)과의 관계를 구명(究明)코저 인삼주산지(人蔘主産地) 강화외(江華外) 4개군(個郡)의 농가포장(農家圃場)(홍삼포(紅蔘圃)) 49개소(個所)을 조사(調査)한 결과(結果)를 요약(要約)하면 다음과 같다. 1. 인삼(人蔘)의 생육(生育) 및 수량(收量)과 상관관계가 있는 화학성분별 함량(含量)은 우량포지(優良圃地)에서 CEC가 8.9~14.5me/100g, 유기물(有機物) 1.5~3.5% 유효인산 45~257ppm, 가리(加里) 0.34~0.55me/100g이었고, K/P비(比)는 0.002~0.012이었다. 2. 이들중 CEC, 유기물(有機物), 치환성가리(置換性加里) 및 K/P비(比)는 수량(收量)과 정상관을 CEC는 생육상황과 유의성(有意性)있는 상관을 나타냈으며, 유효인산은 수량(收量)과 부(負)의 상관을 보여주었다. 3. 임삼포지(人蔘圃地)의 K/P비(比)와 수량(收量)과는 고도(高度)의 정상관을 보여주어 인삼엽중(人蔘葉中)의 K/P비(比)와 수량(收量)과의 밀접(密接)한 관계가 있음을 보여 주었다. To find the relationship between the adequate amount of soil chemical components and ginseng growth including root weight, 49 farmer's red ginseng field from the main ginseng growing area were studied intensively. 1. The ranges of soil chemical component of high yield ginseng field were 8.9 to 14.5 me/100g of CEC 1.5 to 3.5% of organic matter, 45 to 257 ppm of available phosphorus, 0.34 to 0.55 me/100g of potassium and 0.002 to 0.012 of K/P ratio respectively. 2. Higher content of organic matter, CEC, exchangeable potassium and higher rate of K/P were observed in soils of ginseng field with high yield than in soils of low one. The CEC content in soil was positively correlated with the plant growth, and available phosphate content in soil was negatively correlated with yield of ginseng root. 3. There was highly positive significant correlation between root yield of ginseng and K/P ratio of ginseng soil. Similar result also observed between root yield of ginseng and K/P ratio of upper part of ginseng plant.

Vision-Based Finger Action Recognition by Angle Detection and Contour Analysis

이대호,SeungGwan Lee 한국전자통신연구원 2011 ETRI Journal Vol.33 No.3

In this paper, we present a novel vision-based method of recognizing finger actions for use in electronic appliance interfaces. Human skin is first detected by color and consecutive motion information. Then, fingertips are detected by a novel scale-invariant angle detection based on a variable k-cosine. Fingertip tracking is implemented by detected region-based tracking. By analyzing the contour of the tracked fingertip, fingertip parameters, such as position, thickness, and direction, are calculated. Finger actions, such as moving, clicking, and pointing, are recognized by analyzing these fingertip parameters. Experimental results show that the proposed angle detection can correctly detect fingertips, and that the recognized actions can be used for the interface with electronic appliances.

Non - Hodgkin`s lymphoma of the thyroid and adrenal glands

이대호(Dae Ho Lee),박재홍(Jae Hong Park),이제정(Je Jung Lee),정익주(Ik Joo Chung),정동진(Dong Jin Chung),정민영(Min Young Chung),이태희(Tai Hee Lee) 대한내과학회 1998 대한내과학회 추계학술대회 Vol.55 No.-

Non-Hodgkin`s Lymphoma of the thyroid and adrenal glands

이대호 ( Dae Ho Lee ),박재홍 ( Jae Hong Park ),이제정 ( Je Jung Lee ),정익주 ( Ik Joo Chung ),정동진 ( Dong Jin Chung ),정민영 ( Min Young Chung ),이태희 ( Tai Hee Lee ) 대한내과학회 1998 대한내과학회 추계학술대회 Vol.1998 No.1

정신분열병 환자에서 Heat Shock Protein 70(HSP70) 유전자 다형성

이대호(Dae-Ho Lee),이선우(Sun-Woo Lee),왕성근(Seong-Keun Wang),신윤오(Yun-O Shin),지익성(Ik-Seoung Chee),김정란(Jeong-Ran Kim),이영호(Young-Ho Lee),김지욱(Ji-Wook Kim) 대한생물치료정신의학회 2006 생물치료정신의학 Vol.12 No.2

목적 : 본 연구는 정신 분열병과 관계 있다고 알려진 HSP70 유전자 중, HSP70-2(HSPA1B) 유전자 다형성에 초점을 맞추어 정신분열병과 관계가 있는지를 알아보기 위해 시행되었다. 방법 : DSM-Ⅳ 진단기준에 의해 진단된 정신분열병 환자군 104명과 정상 대조군 107명을 대상으로 하였다. HSPA1B 유전자형 판별을 위해 restriction fragment length enzyme(RFLP)을 이용한 polymerase chain reaction(PCR)이 사용되었다. 결과 : 정신분열병 환자군에서 HSPA1B 유전자형의 분포는 AA 32(30.8%), AG 57(54.8%), GG 15(14.4%)였으며, 대립 유전자의 빈도는 A 121(58.2%), G 87(41.8%)였다. 정상 대조군에서 HSPA1B 유전자형의 분포는 AA 35(32.7%), AG 63(58.9%), GG 9(8.4%)였으며 대립 유전자의 빈도는 A 133(62.1%), G 81(37.9%)였다. 정신분열병 환자군과 대조군 간 HSPA1B 유전자형의 분포와 대립 유전자의 빈도에 있어서의 차이는 유의하지 않았다. 또한, 환자군을 성별, 정신과적 질병의 가족력, PANSS scale에 따른 증상 심각도 등의 변수에 따라 분류하였을 때도 유전자형의 분포와 대립 유전자의 빈도 차이는 유의하지 않았다. 결론 : 이 연구의 결과는 한국인 정신분열병 환자들에서 HSPA1B 유전자 다형성이 정신분열병의 병인과 관계가 없음을 나타낸다. 가족-기초 비교 위험 연구와 정신분열병의 다른 임상적 변수들을 포함한 향후의 연구가 필요할 것이다. Objectives:The heat shock protein 70(HSP70) is believed to be involved in the pathogenesis of schizophrenia with regards to neurodevelopment. An aberration in the HSP70 has been proposed in schizophrenia patients, suggesting that it is a candidate gene for schizophrenia. This study aimed to investigate the association between polymorphsims of HSP70-2(HSPA1B) and schizophrenia. Methods:One hundred and four patients with schizophrenia and One hundred and seven normal controls were enrolled in the study. A polymerase chain reaction(PCR) with restriction fragment length enzyme(RFLP) was used to genotype the HSPA1B polymorphisms. Results:1) In schizophrenic patients, genotype distributions of the HSPA1B polymorphism were AA 32(30.8%), AG 57(54.8%) and GG 15(14.4%), and allele frequencies were A 121(58.2%), and G 87(41.8%). In normal control, genotype distributions of the HSPA1B polymorphism were AA 35(32.7%), AG 63(58.9%) and GG 9(8.4%), and allele frequencies were A 133(62.1%), and G 81(37.9%). There were no significant differences in the allelic or genotype frequencies of the HSPA1B polymorphisms between the schizophrenia patients and the controls. 2) There were no difference in genotype distribution and allele frequencies of the HSPA1B polymorphism, when patients were categorized by sex, family history of psychiatric disease, severity of symptom with PANSS scale. Conclusion:These results suggest a HSPA1B polymorphism is not causally related to the pathogenesis of schizophrenia in the Korean population. Further study of HSPA1B polymorphism should be needed, including family based association study and other clinical variations of schizophrenia.

국부 다중 영역 정보를 이용한 교통 영상에서의 실시간 차량 검지 기법

이대호(Daeho Lee),박영태(Youngtae Park) 대한전자공학회 2000 대한전자공학회 학술대회 Vol.2000 No.6

레이저 투영 영상 분석에 의한 통신 관로 내벽 검사 기법

이대호(Daeho Lee) 한국멀티미디어학회 2006 멀티미디어학회논문지 Vol.9 No.9

본 논문에서는 지하에 매설된 통신 관로를 레이저 투영 영상 분석에 의해 검사하는 새로운 기법을 제안한다. 레이저 다이오드, 발광 다이오드와 카메라로 구성된 장비가 관내에 직접 투입되며, 레이저 다이오드는 관벽에 투영 영상을 생성하고 발광 다이오드는 내부 조명 장치로 사용되며, 카메라는 관로 영상을 획득한다. 카메라에서 전달된 다양한 조건의 관로 영상에 대해 투영 영역을 정확히 분할하기 위하여, 새로운 색차 모델과 다중 임계치 기법을 이용한다. 분할된 투영 고리의 형상은 최소 직경과 푸리에 표기자에 의해 표현하여 관로의 상태를 규칙에 기반하여 분류한다. 국부적인 최소 직경과 전역적인 푸리에 표기자를 모두 사용하므로 파손된 관로, 찌그러진 관로 등의 다양한 조건에서 높은 분류 성능을 나타낼 수 있으며, 여러 상태의 영상에 대한 실험 결과는 2% 미만의 오분류로 높은 성능을 나타냈다. This paper proposes a novel method for grading of underground communication conduits by laser projection image analysis. The equipment thrust into conduit consists of a laser diode, a light emitting diode and a camera, the laser diode is utilized for generating projection image onto pipe wall, the light emitting diode for lighting environment and the image of conduit is acquired by the camera. In order to segment profile region, we used a novel color difference model and multiple thresholds method. The shape of profile ring is represented as a minimum diameter and the Fourier descriptor, and then the pipe status is graded by the rule-based method. Both local and global features of the segmented ring shaped, the minimum diameter and the Fourier descriptor, are utilized, therefore injured and distorted pipes can be correctly graded. From the experimental results, the classification is measured with accuracy such that false alarms are less than 2% under the various conditions.

Dipeptidyl Peptidase-4 (DPP-4) 억제제

이대호 ( Dae Ho Lee ) 대한내과학회 2014 대한내과학회지 Vol.87 No.1

Recent advances in incretin biology have led to the development of a new class of oral anti-diabetic drugs. To date, there are two known incretin hormones, glucagon-like peptide-1 (GLP-1) and glucose-dependent insulinotropic polypeptide (GIP), of which the former is a more important therapeutic target for type 2 diabetes. GLP-1 is secreted by intestinal L-cells in response to oral nutrient intake, and it stimulates insulin secretion and suppresses glucagon secretion in a glucose-dependent manner. However, both GLP-1 and GIP are rapidly degraded by dipeptidyl peptidase-4 (DPP-4), a multifunctional type II transmembrane glycoprotein. Thus, several DPP-4 inhibitors with different pharmacologic features are now available and can be used either as monotherapy or in combination with other anti-diabetic agents for the treatment of type 2 diabetes. In both therapeutic regimens, DPP-4 inhibitors have been shown to reduce hemoglobin A1c levels by approximately 0.5-0.8%. In clinical trials, DPP-4 inhibitors were generally well-tolerated, posed a low risk of hypoglycemia, and did not increase body weight. Despite some reports of a possible increased risk of pancreatitis with GLP-1 receptor agonists and DPP-4 inhibitors, no causal associations have been found. Recent randomized controlled clinical trials have shown that DPP-4 inhibitors did not increase or decrease the rates of major adverse cardiovascular events in patients with type 2 diabetes at high risk of cardiovascular disease, even though this class of anti-diabetic agents had various salutary effects in many studies involving animals or healthy and diabetic humans. Additional studies will be required to resolve these disparate conclusions. (Korean J Med 2014;87:1-8)

환율과 주가간의 인과관계 분석

이대호(Lee Dae Ho),김응래(Kim Eung Rae) 한국무역학회 2000 貿易學會誌 Vol.25 No.1