• 센서학회지
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• 제25권5호
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• pp.349-353
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• 2016

Recently, research on bolometer-type uncooled infrared image sensor which is made for industrial applications has been increasing. In general, it is difficult to calibrate fixed pattern noise (FPN) of bolometer array. In this paper, average-current calibration algorithm is presented for reducing bolometer resistance offset. A resistor which is produced by standard CMOS process, on the average, has a deviation. We compensate for deviation of each resistor using average-current calibration algorithm. The proposed algorithm has been implemented by a chip which is consisted of a bolometer pixel array, average current generators, current-to-voltage converters (IVCs), a digital-to-analog converter (DAC), and analog-to-digital converters (ADCs). These bolometer-resistor array and readout circuit were designed and manufactured by $0.35{\mu}m$ standard CMOS process.

• Journal of Acupuncture Research
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• 제17권3호
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• pp.199-207
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• 2000

Objectives : Yogaktong is the general term of lowback and sciatic pain. Simplely this is not for the syndrom or illiness but for the symptoms. In the field of western medicine, it's difficult to find out the cause and to be objective when the patient feel back and sciatic pain without HNP of L-spine. Methods : To get objective yogaktomg symptoms I did this study. This is the case study of 103 patients who felt yogaktomg, and had taken DITII(Digital Infrared Thermal Imaging) at department of acupuncture and moxibustion in Conmaul Oriental medical hospital from september 1, 1998 to august 30, 1999. Results : The temperature raised 53.4% at center of lowback. There is a temperature differance on both legs, in 70.73% of patients the pain side of leg is lower temperature than the other side. Conclusions : Generally, DITI of patients who have lowback and sciatic pain is shown increasing temperature in center of lowback, decreasing temperature in pain side of leg.

• 한국컴퓨터정보학회논문지
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• 제22권5호
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• pp.21-28
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• 2017

As technology related to digital imaging equipment is developed and generalized, digital imaging system is used for various purposes in fields of society. The object tracking technology from digital image data in real time is one of the core technologies required in various fields such as security system and robot system. Among the existing object tracking technologies, cam shift technology is a technique of tracking an object using color information of an object. Recently, digital image data using infrared camera functions are widely used due to various demands of digital image equipment. However, the existing cam shift method can not track objects in image data without color information. Our proposed tracking algorithm tracks the object by analyzing the color if valid color information exists in the digital image data, otherwise it generates the lightness feature information and tracks the object through it. The brightness feature information is generated from the ratio information of the width and the height of the area divided by the brightness. Experimental results shows that our tracking algorithm can track objects in real time not only in general image data including color information but also in image data captured by an infrared camera.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2003년도 Proceedings of ACRS 2003 ISRS
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• pp.869-872
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• 2003

The thermal contamination of the Younggwang coastal marine ecosystem has been investigated using space borne thermal infrared data acquired over the period 1985-2003 by the Landsat and NOAA satellites. The analysis of AVHRR data brought out the general pattern and extension of thermal plume while TM data yielded more accurate information about the plume shape, dimension, dispersion direction etc. The examination of sea surface temperature (SST) computed from these images clearly indicates that the thermal plume extends 70 to100km southward during summer and 50 to70km northwestward during winter monsoons. The maximum plume temperature was 29$^{\circ}C$ in summer and 12$^{\circ}C$ in winter. The comparative analysis shows that the temperature retrieved from TM is slightly higher (1.8$^{\circ}C$, 3$^{\circ}C$ and 2.2$^{\circ}C$ for the images of 98/11/10, 99/05/05 and 99/05/21 respectively) than those derived from AVHRR data. The correlation coefficient between the TM-derived SST and AVHRR-derived SST was 0.72.

• 대한안전경영과학회지
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• 제23권3호
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• pp.83-88
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• 2021

Recently, due to the aging of workers and the weakening of the labor base in the automobile industry, research on quality inspection methods through ICT(Information and Communication Technology) convergence is being actively conducted. A lot of research has already been done on the development of an automated system for quality inspection in the manufacturing process using image processing. However, there is a limit to detecting defects occurring in the automotive sunroof sealer application process, which is the subject of this study, only by image processing using a general camera. To solve this problem, this paper proposes a system construction method that collects image information using a infrared thermal imaging camera for the sunroof sealer application process and detects possible product defects based on the SVM(Support Vector Machine) algorithm. The proposed system construction method was actually tested and applied to auto parts makers equipped with the sunroof sealer application process, and as a result, the superiority, reliability, and field applicability of the proposed method were proven.

• Journal of Ceramic Processing Research
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• 제20권1호
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• pp.59-62
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• 2019

Y2O3-MgO nanocomposites are promising materials for hypersonic infrared windows and domes due to their excellent midIR transmittance and mechanical properties. In this work, influence of SPS heating rate on the microstructure, IR transmittance, and mechanical properties of Y2O3-MgO nanocomposites was investigated. It was found that the average grain size decreases with a decreasing heating rate, which can be attributed to high defect concentration by rapid heating and deformation during densification. Also, the residual porosity decreases with a decreasing heating rate, which is ascribed to the enhancement of grain boundary diffusion by a large grain-boundary area (a small grain size). Consequently, high transmittance and hardness were attained by the low heating rate. On the other hand, the mechanical strength showed little difference with the heating rate change, which is somewhat different from the general knowledge on ceramics and will be discussed in this letter.

• 한국초지조사료학회지
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• 제34권4호
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• pp.277-282
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• 2014

Nutritive value analysis of feed is very important for the growth of livestock, and ensures the efficiency of feeds as well as economic status. However, general laboratory analyses require considerable time and high cost. Near-infrared reflectance spectroscopy (NIRS) is a spectroscopic technique used to analyze the nutritive values of seeds. It is very effective and less costly than the conventional method. The sample used in this study was a corn kernel and the partial least square regression method was used for evaluating nutrient composition, digestibility, and energy value based on the calibration equation. The evaluation methods employed were the coefficient of determination ($R^2$) and the root mean squared error of prediction (RMSEP). The results showed the moisture content ($R^2_{val}=0.97$, RMSEP=0.109), crude protein content ($R^2_{val}=0.94$, RMSEP=0.212), neutral detergent fiber content ($R^2_{val}=0.96$, RMSEP=0.763), acid detergent fiber content ($R^2_{val}=0.96$, RMSEP=0.142), gross energy ($R^2_{val}=0.82$, RMSEP=23.249), in vitro dry matter digestibility ($R^2_{val}=0.68$, RMSEP=1.69), and metabolizable energy (approximately $R^2_{val}$ >0.80). This study confirmed that the nutritive components of corn kernels can be predicted using near-infrared reflectance spectroscopy.

• 대한약침학회지
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• 제8권3호
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• pp.115-121
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• 2005

Objectives : This study was designed to find out the effect of seven acupoints of stroke in cerebrovascular hemiplegia patients. Methods : This study was performed on 6 patients with cerebrovascular hemiplegia (test group) and 6 health persons(control group). We measured temperature of skin surface of test and control group using digital infrared thermographic imaging(D.I.T.I) after acupunture on seven acupoints of stroke. And we calculated difference of skin temperature between healthful and affected side for each groups. Results : There was significant difference in area 3 in both two groups between before and after acupuncture. But in general there Was no significant difference between two groups on thermographic change. Conclusions : This is pilot study, so further studies are required to find out the effect of seven acupoints of stroke in cerebrovascular hemiplegia patients.

• Journal of Astronomy and Space Sciences
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• 제23권4호
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• pp.425-434
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• 2006

한국천문연구원에서 개발 중인 근적외선카메라 KASINICS(KASI Near Infrared Camera System)의 운용을 위한 온도 진공 모니터 시스템을 개발하였다. 이 시스템은 하드웨어 부분과 소프트웨어 부분으로 나누어지며, 온도와 진공도의 측정자료를 실시간으로 PC에서 출력하고 저장할 수 있도록 구성하였다. 이 시스템은 KASINICS와 같은 적외선카메라뿐만 아니라 극저온 냉각을 요하는 모든 장치에 적용할 수 있다. 우리는 KASINICS의 냉각 및 진공 시험을 수행하면서 우리가 개발한 모니터 시스템이 적외선카메라의 시험과 운용에 있어서 효율적이고 안정적이라는 것을 확인할 수 있었다.

• 대한원격탐사학회지
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• 제30권4호
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• pp.465-480
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• 2014

본 연구에서는 최근 발생한 집중호우 사례들 중 예보가 어려워 피해가 컸던 두 사례(2010년 9월 21일, 2011년 8월 9일)에 대해 적외영상과 수증기영상의 시 공간적인 변화 특성을 분석하였다. 두 사례에서 한반도지역에 집중호우를 유발한 대류 세포들은 적외영상에서 하층운이 광범위하게 분포하고 수증기 영상에서는 명역과 암역의 경계(boundary)에서 생성되는 특징을 보였다. 또한 대류 세포들의 이동속도 차에 의한 총 5번의 병합과정 중 4번의 병합과정에서 대류 세포들의 병합 후 대류 세포는 더욱 발달되었으며 강수 강도도 급격하게 강화되었다. 대류시스템에서의 강우강도 변화는 휘도온도의 평균보다 최소 휘도온도의 시간적 변화와 밀접하게 관련된 것으로 판단되며 대류 세포들의 병합도 집중호우의 강도 변화에 영향을 주는 주요 인자로 생각된다. 대류 세포들의 병합은 영상동화를 통해 어느 정도 예측이 가능하지만 대류 세포의 탐지는 적외 및 수증기 영상 모두에서 일정 강도 이상 발달한 상태에서만 탐지가 가능하였다.