• KSCE Journal of Civil and Environmental Engineering Research
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• v.32 no.1D
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• pp.23-31
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• 2012

Busan Metropolitan City government has been implementing the local Bus Quasi-Public Operating policy since 2007. As a result of the policy, financial burden to cover financial deficit has become a big social issue. For successful settlement of the policy, the government should be able to gradually cut off the financial support for the deficit by continuously increasing the bus demand, which can be accomplished by providing more convenient bus services. The weather conditions that affect the public transportation demand include rain, fog and snow. They affect the mode choice for public transportation use, which in turn results in decrease in bus demand. In short, the adverse weather conditions result in significant profit loss of bus transportation, and consequently it financially burdens the City of Busan. In this research, the pattern of travelers' use of transportation modes given various weather conditions was analyzed. In addition, the reasons why people transfer from one to other transportation modes were analyzed by conducting a field survey, and policy implications on desirable public transportation facilities and transfer system were discussed.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2017.10a
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• pp.170-172
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• 2017

Due to the technological advances in modern society, the distinction between mask and authenticity is becoming very difficult. to solve these problems, this paper describes a high-level improvement of the image processing technique of the code authentication system which discriminates the good and the bad by using the color information and the dot information. Labels were given to each genuine article and the article, which can not be distinguished from each other. In the proposed method, image matching of labels is performed using the opencv library, and genuine and good products are discriminated by using the halftone dots and w dot dots of each label. In this paper, the proposed method stores genuine and good labels on the server and compares them with the user's labels to determine genuine products.

• 전자공학회논문지 IE
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• v.43 no.4
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• pp.37-42
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• 2006

This paper proposes a adaptive video watermarking algorithm according to bitrate and motion vector size in MPEG2 system. The watermark strength in the I-frames is adapted for quantization step size and the strength in the P-B-frames is adapted for quantization step size and motion vector of macroblock to make the watermark more robust against the accompanying degradation due to aggressively compression. A realtime watermark extraction is done directly in the DCT domain during MPEG decoding without full decoding of MPEG video. The experimental simulations show that the video quality results almost invisible difference between the watermarked frames and the original frames and the watermark is resistant to frame dropping, MPEG compression, GoP conversion and low pass filter attacks.

• Journal of Broadcast Engineering
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• v.22 no.6
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• pp.817-828
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• 2017

In this paper, we propose an efficient stabilization algorithm for 360 VR sequence, where the geometric information and the relationship between various projection formats have been utilized. The proposed scheme consists of '1st stitching', 'extraction of wide angle picture from VR data', 'stabilization', and '2nd stitching'. The simulation results show that the proposed method outperforms the conventional algorithms in the viewpoint of image quality for end-user.

• The Inventors News
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• no.44
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• pp.1-16
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• 2006

한국여성발명협회,제7회 정기총회 개최/2006 대한민국 여성발명품 박람회/제12회 여성발명 우수사례 발표회/새롭게 바뀐 특허분류, 무엇이 달라졌나/해외 특허, 3월부터 무료로 검색 서비스/'디자인 등록증' 취업에 필수 요소 되다/전상우 특허청장 취임식 갖다/인라인 스케이트에도 특허 열풍/김종갑 전 특허청장, 산자부 제 1차관에 임명/공익변리사에게 무료 특허상담 받으세요/전상우 특허청장, 2006년 업무계획 발표/'제41회 발명의 날' 포상계획 공고/특허기술동향조사 확대/상표 불사용 취소심판 제도 개선/한국특허정보원, 한양대학교와 업무협약 체결/담배 상표, 다등록업체 1위KT&G/계절 관련 상표 출원, '봄'을 가장 선호/사회적 취약 계층, 심판.소송 비용 지원/국제문화대학원대학교,'국제 특허.경영학, 통해 전문가 과정 양성/'2006 대한민국 특허기술 이전박람회' 신청 접수/산업재산권분쟁조정 효력, '재판상 화해'로 강화/점차 늘고 있는 '유방암' 자가 진단법/'태국 발명가의 날 전시회' 한국발명진흥회 참가/'상표 판결문 요지집' 발간/역사 속의 발명품/하루 10분 발명교실/특허Q&A/'신뢰와 성실로 지식재산의 권리화를 돕겠습니다'/설봉초등학교 발명교실/아이디어 착상 및 발명 기법/사업화 지원 제도를 제대로 활용하려면/손님의 주문으로 만든 다니의 단팥죽/일본과 유럽, 브라질 디지털 방송 쟁탈전/미국, 도요타 흔들기 나섰다/새집증후군, 시스템 환기로 줄인다/공무원이 대나무로 분뇨 구린내 잡았다/획기적인 '기능성 목발' 탄생/발광 현수막, 눈에 띄네/리빙 아이디어/특허기술평가수수료 지원/한국여성발명협회 회원사 발명품 가이드

• Journal of the Korean Institute of Intelligent Systems
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• v.10 no.5
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• pp.459-465
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• 2000

In this paper, we propose a method for controlling camera focus in the short distance by analyzing NTSC signal of a CCD camera. When the distance between a camera and an object is less than about 1 meter, the existing CCD cameras with auto-focusing function are hard to acquire the proper images because they focus on the protruding minute parts ofthe object without taking into account the whole state of the object. To solve such a problem, we use an annealing algorithm to control the motor of a camera by analyzing the overall signal obtained from the camera. By doing so, we can acquire the adequate images at the near distance. The proposed method will be used for a personal identification system by human iris patterns.

• Convergence Security Journal
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• v.11 no.6
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• pp.17-23
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• 2011

In this paper, we propose mobile Augmented Reality(AR) for smart learning system which is advanced e-learning. AR is technology that seamlessly overlays computer graphics on the real world. AR has become widely available because of mobile AR. Mobile AR is possible to get information from real world anytime, anywhere. Nowadays, there are various areas using AR such as entertainment, marketing, location-based AR. One of the most promising areas is education. AR in education shows lifelike images to users for realism. It's a good way for improving concentration and attention. We utilize only a camera for image-based AR without other sensor.

• Journal of the Korean Society of Propulsion Engineers
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• v.12 no.6
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• pp.7-11
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• 2008

The helicopter flies at low level flight mode in its own operational range comparing to other aircraft categories. The low level flight means that the engine operates at variable atmospheric condition such as hot and cold temperature, snow, heavy rain, etc. Furthermore it may increase the entering possibility of engine foreign object damage particles like sand, dust, etc., i.e. this operating condition gives rise to damages of engine gas path components. An on-line condition monitoring program was developed by using SIMULINK, where measurement signals were simulated as an input module. The reliability and capability of the developed on-line condition monitoring were confirmed through application to a real helicopter engine health monitoring.

• Proceedings of the Korea Information Processing Society Conference
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• 2005.05a
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• pp.823-826
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• 2005

본 논문에서는 얼굴 영상으로부터 얼굴인식을 위한 눈동자를 검출하기 위한 방법을 제안하고자 한다. 제안된 방법은 분리 필터를 사용하여 홍채의 후보가 되는 영역을 구한 후 양자를 잇는 선분의 길이 및 기울기의 허용치 안에 있는 모든 영역에 대해 본 논문에서 제안한 방식으로 그 값을 계산한다. 이 값은 영역의 근방영역에서 홍채의 경계선에 대응하는 원을 허프변환으로 구했을 때 후보 영역의 원에서의 후보 영역과 인접하면서 분리된 영역 내의 평균 휘도 값 및 영역을 포함한 부분화상과 눈의 템프릿 사이의 정규화된 상관계수를 사용하여 계산된다. 그리고 그 값을 최소로 하는 영역들을 택하여 이것을 양눈의 홍채로 검출한다. 안경을 쓰지 않은 총 150장의 얼굴영상을 사용하여 실험한 결과 최대 97.3%, 최소 95.3%의 성공률을 얻을 수 있었으며, 약간의 오차를 허용한 경우에는 최대 99.3%, 최소 96.7%의 성공률을 얻을 수 있었다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• v.9 no.1
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• pp.489-492
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• 2005

In this paper, we present a system for robust face detection based on wavelet transform using the standard models of image distortion. In the previous works, it was known to be difficult to treat a distorting of image information such as noises and light of the images obtained by a still camera and a movie camera. we analyze the high frequence information by using wavelet transform. This information is used for testing the image distortion and constructing the standard models of image distortion. The experimental results show that our extracting method based on standard models of image distortion is very effective.