• Journal of Advanced Marine Engineering and Technology
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• 제29권5호
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• pp.560-570
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• 2005

In this paper, we discuss the tracking system for a wheelchair which can follow the path of a human target such as a nurse in hospital. The problem of human tracking is that it requires recognition of feature as well as the tracking of human positions. For this purpose the use of a high cost visual sensor such as laser finder or streo camera makes the tracking a high cost additional expense. This paper proposes the tracking system uses a low cost infrared range-finder and CCD camera, The Infrared range-finder and CCD camera can create a target candidate through each target recognition algorithm. and this information is fused in order to reduce the uncertainties of a target decision and correct the positional error of the human. The effectiveness of the proposed system is verified through experiments.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2002년도 전력전자학술대회 논문집
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• pp.711-714
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• 2002

Thermal infrared camera have poor image qualities compared to commercial CCD cameras, as in contrast, brightness, and. resolution. To compensate the poor Image quality problems associated with the thermal infrared camera, the technique of superimposing thermal infrared image into real ccd image is proposed. The mobile robot KAEROT/m2, loaded with sensor head system at the mast, is entered to monitor leakage of heavy water and thermal abnormality of the calandria reactor area in overhaul period. The sensor head system is composed of thermal infrared camera and cod camera In parallel. When thermal abnormality on observation points and areas of calandria reactor area is occurred, unusual hot image taken from thermal infrared camera is superimposed on real CCD image. In this inspection experiment, more accurate positions of thermal abnormalities on calandria reactor area can be estimated by using technique of mapping thermal infrared image into CCD image, which include characters arranged in MPOQ order.

• 한국측량학회지
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• 제23권4호
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• pp.367-374
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• 2005

최근 들어 자주 발생하는 산림피해는 세계적으로 커다란 이슈가 되고 있으며, 그 중에서도 산불에 의한 피해는 그 자체로서의 피해뿐 만이 아니라, 홍수 등으로 이어지는 2차 피해로 연결이 된다. 또한 산불 등은 자연적인 원인보다는 사람에 의한 인위적인 재해가 많은 것도 주지의 사실이다. 본 연구에서는 위성영상 자료를 이용하기 위한 사전작업으로 근적외 CCD카메라와 분광반사계를 사용한 식생의 분광반사특성을 이용하여 산불의 피해 정도를 파악하고자 하였다. 즉 육안 관측에 의해 산림 피해도를 무(無), 중(中), 강(强)으로 구분하여 산림의 활성도를 평가하여 산림의 소생가능성을 파악하였다. 분광반사계와 근적외 CCD 카메라에 의한 분광 반사 특성간의 상관 관계를 구한 결과, 피해도 무(無), 중(中), 강(强)에서 높은 상관관계를 얻을 수 있었다. 따라서 산불피해 조사시 분광반사계와 근적외 CCD카메라를 병용하여 사용함으로서, 육안으로 관측하기 어려운 산불의 피해를 파악할 수 있었다.

• 융합신호처리학회논문지
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• 제18권1호
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• pp.25-30
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• 2017

현재 곡물선별기는 대부분 CCD 광학카메라를 이용하여 불량품을 찾아내고 있다. 본 논문에서는 CCD 카메라를 이용함과 동시에 근거리적외선 센서의 수분측정 방법을 추가하여 곡물선별기의 선별력향상을 목표로 한다. 그리고 구현한 알고리즘을 곡물선별기에 실제로 적용할 수 있도록 근거리적외선 영상보드 시스템을 개발하여, 원료의 내부 수분 함량을 고속으로 체크하여 일정함량 미달인 경우 불량으로 간주하여, 불량품을 실시간으로 제거하는 곡물선별기 시스템을 개발하고자 한다.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2002년도 Proceedings of International Symposium on Remote Sensing
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• pp.578-578
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• 2002

Thermal infrared imaging is a highly promising technology for condition monitoring and predictive maintenance of electronic, electrical and mechanical elements in nuclear power plants. However, conventional low-cost infrared imaging systems suffer from poor spatial resolution compared to commercial CCD cameras. This paper describes an approach to enhance inspection performances for calandria reactor area of Wolsung nuclear power plant through the technique of superimposing thermal infrared image into real CCD image. In the occurrence of thermal abnormalities on observation points and areas of calandria reactor area, unusual hot image taken from thermal infrared camera is mapped upon real CCD image. The performance of the technique has been evaluated in the experiment carried out at Wolsung nuclear power plant in the overhaul period. The results show that localizations of thermal abnormalities on calandria reactor face can be estimated accurately.

• 제어로봇시스템학회논문지
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• 제17권3호
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• pp.229-235
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• 2011

To make a robust object tracking and identifying system for an intelligent robot and/or home system, heterogeneous sensor fusion between visible ray system and infrared ray system is proposed. The proposed system separates the object by combining the ROI (Region of Interest) estimated from two different images based on a heterogeneous sensor that consolidates the ordinary CCD camera and the IR (Infrared) camera. Human's body and face are detected in both images by using different algorithms, such as histogram, optical-flow, skin-color model and Haar model. Also the pose of human body is estimated from the result of body detection in IR image by using PCA algorithm along with AdaBoost algorithm. Then, the results from each detection algorithm are fused to extract the best detection result. To verify the heterogeneous sensor fusion system, few experiments were done in various environments. From the experimental results, the system seems to have good tracking and identification performance regardless of the environmental changes. The application area of the proposed system is not limited to robot or home system but the surveillance system and military system.

• 제어로봇시스템학회논문지
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• 제16권1호
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• pp.25-32
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• 2010

The paper proposes a hierarchical fault detection method for the high voltage equipment using a microphone array which detects the location of fault and the thermal imaging and CCD cameras which verifies the fault and stores the image, respectively. There are partial arc discharges on the faulty insulators, which generates a specific pattern of sound. Detecting the signal using the microphone array, the location of the faulty insulator can be estimated. The 6th band-pass filter was applied to remove noise signal from wind or external influence. When the mobile robot carries the thermal and CCD cameras to the possible place of the fault insulator, the fault insulators or power transmission wires can be detected by the thermal images, which are caused by the aging or natural erosion. Finally, the CCD camera captures the image of the fault insulator for the record. The detection scheme of fault location using the microphone array and the thermal images have been proved to be effective through the real experiments. As a result of this research, it becomes possible to use a mobile robot with the integrated sensors to detect the fault insulators instead of a human being.

• 전자공학회논문지SC
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• 제43권3호
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• pp.25-30
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• 2006

디지털 영상처리를 이용해 CCD 센서의 스펙트럼 응답특성을 직접 측정할 수 있는 적외선 영상기법을 제안하고 있다. 이 방법은 쉽고 경제적인 방법으로 상용 CCD 센서의 스펙트럼 감도를 검출할 수 있도록 한다. 본 장치의 핵심 부품은 단색광원기, CCD 지지대, 디지털 영상처리 시스템이 내장된 컴퓨터이다. 방법의 타당성을 증명하기 위해 상용 CCD 카메라에 대해 시험적으로 행한 실험은 이론적인 모델과 잘 일치함을 보여 주었다.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2002년도 ICCAS
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• pp.96.4-96
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• 2002

Thermal infrared imaging is a highly promising technology for condition monitoring and predictive maintenance of electronic, electrical and mechanical elements in nuclear power plants. However, conventional low-cost infrared imaging systems suffer from poor spatial resolution compared to commercial CCD cameras. This paper describes an approach to enhance inspection performances for calandria reactor area of Wolsung nuclear power plant through the technique of superimposing thermal infrared image into real CCD image. In the occurrence of thermal abnormalities on observation points and areas of calandria reactor area, unusual hot image taken from thermal infrared camera is mapped upon re...

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2013년도 춘계학술대회
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• pp.597-598
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• 2013

국가산업시설인 통신망 및 전력시설과 원자력 및 화력발전소, 중대형 건물, 문화재, 금속 및 철강공장, 화학공장, 정유공장 등 대형공장의 화재위험 지역에서 많은 화재 및 범죄사고가 발생하여 국가적으로 지대한 손실을 초래하고 있다. 이러한 사건과 사고를 근본적으로 방지하기 위해서는 객체의 온도와 움직임을 고수준으로 감지 할 수 있는 화재감지 시스템의 개발이 필수적이다. 본 논문에서는 이러한 문제점을 해결하기 위하여 적외선 열영상 및 CCD 카메라 기반 화재감지 및 연기감지가 가능한 화재감지 시스템을 설계하였다.