표정인식을 위한 PCA와 템플릿 정합을 사용한 얼굴 요소 추출

우효정, 이슬기, 김동우, 류성필, 안재형 충북대학교 산업과학기술연구소 2013 산업과학기술연구 논문집 Vol.27 No.2

This paper proposed an extracting algorithm of human facial components for the recognition of facial expressions. First face image is acquired using the Haar-like feature mask from an input image. The face image is divided into two images. One is the upper image including eye and eyebrow. The other is the lower image including mouth and jaw. The extraction of facial components, such as eye and mouth, begins getting eye image and mouth image. Then eigenfaces are produced by the PCA training process with learning images. An eigeneye and an eigenmouth are produced from eigenfaces. Result eye image is obtained by template matching the upper image with the eigeneye, and the mouth image is obtained by template matching the lower image with the eigenmouth. The simulation results show that the proposed method has superior extraction ratio than previous method.

Impedance Matching with Parallel Coupled Lines in Amplifier

Dong Sik Ahn,Dong Pil Jang,Sung Joon Lim 대한전자공학회 1997 CDMA International Conference and Exhibition Vol.- No.-

Collision Avoidence Sense in Vehicle

Dong Sik Ahn,Dong Pil Jang,Sung Joon Lim 대한전자공학회 1997 CDMA International Conference and Exhibition Vol.- No.-

沙上地域 産業體 勞動者의 職場體育 參與擴大 方案

安永弼,鄭琮勳,鄭三鉉,金海禮,趙在基,朴俊東,金垠利,張禎允,金福善,孔庚鎬 東亞大學校附設스포츠科學硏究所 1989 스포츠科學硏究論文集 Vol.7 No.-

정보통신 서비스의 실패 요인 : 한국의 텔레콤 서비스시장에서의 실패사례연구

안재현,권재원,김명수,이동주,이상윤,한상필 한국경영과학회 2002 한국경영과학회지 Vol.27 No.3

In this paper, 15 South Korean telecommunications service failure cases were analyzed. Through the in-depth case study, 8 factors were found to be the major causes contributing to the telecommunications service failure. They were (1) ineffective marketing, (2) poor demand forecasting due to misjudgment of customer preference, (3) failure to satisfy technical specifications, (4) loss of cost advantage due to the price cut of competing service or new entry with power price, (5) loss of utility advantage due to the increased utility of competing service or new entry with higher utility (6) decrease of market attractiveness due to change of customer preference, (7) impact of government policy, and (8) insufficient or low quality of contents. Additional analysis was done to derive managerial implications to the new telecommunications service development strategy. The findings from the paper will provide valuable insight to the successful implementation of new service development and service provisioning processes.

영지추출액의 혈관신생에 대한 실험적 연구

안교필,김동원,김형환,최호영 대한한방성인병학회 2000 韓方成人病學會誌 Vol.6 No.1

Objectives : To discover and test the efficacy of new angiogenic materials, The angiogenic effect of the water extract of Ganoderma lucidum (EGL) was measured under rat sponge model for quantitative in-vivo studies. Methods : It was based on subcutaneous implantation of sterile polyester sponges in the male sprague dawley (SD) rats and we have characterized a dye method and histology. The angiogenic response was verified by quantitation of histological evaluation of vascularized sponges. Angiogenesis was assessed by the dye method that incorporate 5% carmine red (490 nm), 1% cresyl violet (609 nm) in 10% gelatin solution. It was used to monitor at fixed time points (days 7 and 14). vascularity index expressed as ㎍ dye/㎎ dry tissue. Results : Subcutaneous implantation of sterile polyester sponges in SD rats enhanced the neovascularization between days 7 and 14. Daily doses of 1 μ㎎/㎏ and 10 μ㎎/㎏ EGL produced no apparent effect on spongeinduced angiogenesis but 100, 300 and 1000 ㎍/㎏ EGL caused intense neovasculalization. The vasoconstrictor peptide, angiotensin Ⅱ, in daily doses of 100 nmol, caused an intense neovascularization but lower doses of angiotensin Ⅱ produced no apparent effect (1 nmol, 10 nmol). 100 ㎍/㎏ EGL - induced angiogenesis represents a special form of angiogenesis and We have shown that co-administration of 100 ㎍/㎏ EGL and 100 nmol All accelerated potent angiogenesis. Conclusion : Thus we concluded that the EGL was possessed intense angiogenesis and EGL may have therapeutic potential for the management of endometrial development, wound repair and embryonic development.

암반사면의 안정성 검토에 관한 연구

안종필,박주원,오수동 朝鮮大學校 建設技術硏究所 1999 建設技術硏究 Vol.19 No.3

In general the evaluation process of rock slope stability is an ambiguous system which is made up of ideas subjected to practical experience of an expert. This paper aims to propose more effective methods that helps engineers to evaluate the stability of rock slope by using RMR(Rock Mass Rating for the Geomechanics Classification) and Stereo-graphic Projection and Fuzzy Approximate Reasoning Concept. The result of this paper is that a rational evaluation of rock slope stability and countermeasures can be achieved through RMR and Stereo-graphic Projection and Fuzzy Approximate Reasoning Concept.

초음파 센서를 이용한 모션 인식 수도꼭지 개발 및 연구

김동현(Dong-Hyun Kim),유재호(Jae-Hoo Ryu),주종수(Jong-Soo Ju),안종필(Jong-Pil Ahn),김재욱(Jae-Wook Kim) 한국전자통신학회 2022 한국전자통신학회 논문지 Vol.17 No.2

기술의 발전은 사람의 삶을 편하게 개선했고, 더 쉽고 안전하고 간단하게 발전해 왔다. 우리는 주로 화장실에서 물의 온도를 맞추기 위해 뜨거운 물로 틀고 온도를 점점 맞춰가며 자신이 원하는 온도를 피부로 찾는다. 이러한 상황에서 ‘만약 물의 온도를 눈으로 볼 수 있고, 안전한 시스템을 포함하면서 화장실의 인테리어까지 도울 수 있는 장치가 있으면 어떨까’라는 생각을 했고, 안정성을 중요시하는 시스템을 만들고자 했다. LCD와 LED를 넣어 우리가 온도를 촉각적으로 느끼기 전에 시각적으로 먼저 알 수 있게 하여, 보다 나은 안전성을 확보하는 것이 가장 큰 목적이다. 실험 결과 수온 센서에서 감지되는 온도와 LCD에서 표시되는 온도는 실 온도와의 오차가 없었고 초음파 센서를 이용한 거리 측정 실험에서는 27cm까지는 오차가 발생하지 않았다. 28cm 이상부터는 2% 정도의 오차가 발생했지만, 수도꼭지라는 카테고리 안에서 사용하기에는 큰 불편함은 없다. Advances in technology have improved people s lives comfortably and have developed more easily, safely and simply. We usually turn on hot water to set the temperature of the water in the bathroom and gradually adjust the temperature to find the temperature we want with our skin. In this situation, I thought, What if there is a device that can see the temperature of water with my eyes and help with the interior of the bathroom while including a safe system, and tried to create a system that values stability. For example, if a child accidentally changes the temperature of the water to high temperature while washing, he or she can get burned. And the biggest purpose is to secure better safety by adding LCDs and LEDs so that we can visually know the temperature before feeling it tactilely. As a result of the experiment, there was no error between the temperature detected by the water temperature sensor and the temperature displayed on the LCD, and no error occurred up to 27 cm in the distance measurement experiment using the ultrasonic sensor. There has been an error of about 2% since 28cm or older, but there is no significant inconvenience in using it within the category of faucets.

저해상도 H.264/AVC 비디오를 위한 개선된 디블럭킹 필터

권동진(Dong-Jin Kwon),유성필(Sung-Pil Ryu),곽내정(Nae-Joung Kwak),안재형(Jae-Hyeong Ahn) 한국지능시스템학회 2008 한국지능시스템학회논문지 Vol.18 No.2

비디오 압축 표준 중에서 H.264/AVC는 높은 압축률과 신뢰성 있는 비디오 전송을 지원하기 위해 설계된 표준이다. 이는 블록기반의 DCT를 이용하여 압축을 하기 때문에 블럭킹 효과가 나타나며 이를 감소시키기 위한 디블러킹 필터를 사용하지만 영상이 과도하게 평활화됨으로 화질이 저하된다. 본 논문에서는 이러한 단점을 해결하기 위해 개선된 디블록킹 필터를 제안한다. 제안된 디블록킹 필터는 블록 경계 강도를 재결정 하고 저주파 영역에서의 튀는 점(artifacts)을 제거하기 위해 코너 필터링을 적용한다. 성능을 평가하기 위해 제안된 디블록킹 필터와 기존의 방법을 다양한 비디오에 적용하여 주관적인 화질 평가와 객관적인 화질 평가를 하였다. 실험결과는 제안방법은 영상의 에지가 보존되면서 블록킹 현상이 감소되고 PSNR이 개선됨을 보여준다. H.264/AVC among moving picture compression standard is the standard format for high compression rate and reliable video transimission. It generates blocking effects in video due to compressing video using block-based DCT and includes de-blocking filter to reduce blocking effect. Therefore, the filter makes the video over-smoothing and the quality of it is reduced. In this paper, we propose a improved de-blocking filter to solve the demerit. The proposed de-blocking filter redetermine the block boundary strength and apply the comer filtering to eliminate artifacts in low frequency domain. To evaluate the performance, we apply the proposed deblocking filter and exiting method to various video and evaluated the quality of image subjectively and objectively by analyzing the result. The simulation result shows the proposed method preserves the edge of video, reduces blocking effects and improves PSNR than the existing method.

새로운 쿼드트리를 사용한 ROI 부호화

이동식(Dong-Shik Lee),안종필(Jong-pil Ahn),김영모(Young-Mo Kim) 한국정보기술학회 2011 Proceedings of KIIT Conference Vol.2011 No.5

Region of interest (ROI) 부호화 기술은 중요한 정보가 저장될 때 영상 데이터를 효과적으로 압축할 뿐만 아니라 원격 영상의 압축에도 적합하다. 본 논문은 새로운 정지 영상 압축 구조를 제안하고, 이 구조를 사용하여 ROI 압축에 적용한다. 제안하는 알고리즘은 정지 영상 압축을 위해서 쿼드트리를 기반으로 형태 부화와 우세 값을 사용하는 새로운 구조를 가진다. 제안하는 구조에서 영역에 따라 비트 플레인(bitplane)을 선택적으로 전송하여 ROI 부호화를 구현한다. 제안하는 쿼드트리 구조가 가지는 압축 성능과 기존 쿼드트리가 가지는 다중 해상도 특성과 계층적인 특성을 이용하여 ROI 압축에 적용한다. Region of Interest (ROI) coding be appropriate for efficient compression as well as remote image compression when an important data is saved. This paper proposes the new representation of image which is used for ROI coding. The proposed algorithm has a new structure which has type code and dominant value based on quadtree for image compression. The bitplanes to be sent are selected according to region in order to carry out ROI coding. The compression efficiency of the proposed quadtree, and a multi-resolution and a hierarchical feature are adopted in ROI coding.