• Journal of the Institute of Convergence Signal Processing
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• v.18 no.1
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• pp.25-30
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• 2017

Currently, most of the grain sorter uses CCD optic camera to find defective products. The aim of this paper is to use the CCD camera, and aim for improving the sorting power of the grain separator by using NIR(Near Infrared Radiation) sensor based on moisture content measurement algorithm. We intend to develop a system to develop an NFC imaging system in real time by developing an NIR imaging system and developing the grain sorter system that is considered to be defective in real time by checking the internal moisture content of the raw material in the real time.

• Journal of the Korea Society of Computer and Information
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• v.20 no.3
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• pp.57-67
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• 2015

In this paper, we proposed the geolocation method using target detection information in infrared images. Our method was applied to geolocation system of hostile targets in ground-to-ground field. The major distortion that has bad effect of geolocation was composed of optic, topography, GPS(Global Positioning System) and IMU(Inertial Measurement Unit) of reconnaissance unit. We proposed enhanced geolocation method to cope with optic and topography distortion using polynomial fitting and slant-range calculation model to overcome earth curvature problem, and the result showed that the performance of our method was good for system requirements.

• The KIPS Transactions:PartB
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• v.18B no.3
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• pp.109-116
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• 2011

In this paper, we introduce non-touch style interface system technology without any touch style controlling mechanism, which is called as "Air-interface". To develop this system, we used the full reflection principle of infrared (IR) light and then user's hand is separated from the background with the obtained image at every frame. The segmented hand region at every frame is used as input data for an hand-motion recognition module, and the hand-motion recognition module performs a suitable control event that has been mapped into the specified hand-motion through verifying the hand-motion. In this paper, we introduce some developed and suggested methods for image processing and hand-motion recognition. The developed air-touch technology will be very useful for advertizement panel, entertainment presentation system, kiosk system and so many applications.

• Journal of Sensor Science and Technology
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• v.9 no.1
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• pp.44-50
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• 2000

Every object emits some energy from its surface. The emission energy forms surface heat distribution which we can capture by using an infrared thermal imager. The infrared thermal image may include valuable information regarding to the subsurface anomaly of the object. Since a thermal image reflects surface clutter and subsurface anomaly, we have difficulty in extracting the information on the subsurface anomaly only with thermal images taken under a wavelength. Thus, we use visible wavelength images of the object surface to remove exterior clutter. We, therefore in this paper, visualize the infrared image for overlaying it with a visible wavelength image. First, we make an interpolated image from two ordinary images taken from both sides of an infrared sensor. Next, we overlay the intermediate image with an infrared image taken from the infrared camera. The technique suggested in this paper can be utilized for analyzing the infrared images on non-destructive inspection against disaster and for safety.

• Journal of the Institute of Electronics Engineers of Korea SC
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• v.49 no.3
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• pp.53-61
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• 2012

This paper proposes a real-time distance measurement system of high temperature and high speed target using infrared stereo camera. We construct an infrared stereo camera system that measure the difference between target and background temperatures for automatic target measurement. First, the proposed method detects target region based on target motion and intensity variation of local region using difference between target and background temperatures. Second, stereo matching by left and right target information is used to estimate disparity about real-time distance of target. In the proposed method using infrared stereo camera system, we compare distances in three dimension trajectory measuring instrument and in infrared stereo camera measurement. In this experiment from three video data, the result shows an average 9.68% distance error rate. The proposed method is suitable for distance and position measurement of varied targets using infrared stereo system.

• Proceedings of the Korea Information Processing Society Conference
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• 2015.10a
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• pp.1470-1473
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• 2015

최근 빠른 인터넷 속도를 이용하여 SNS (Social Network Service), 인터넷 방송 등의 엔터테인먼트를 즐기는 사용자가 증가하였다. 이와 함께 직접 사진, 동영상 등의 멀티미디어를 직접 제작해 제공하는 사례도 크게 증가함에 따라 영상처리 기술이 발전하였다. 이에 따라 셀프촬영이 점점 증가하고 있지만, 동영상의 경우는 셀프촬영을 하는데 있어 한계가 있다. 이 문제를 해결하기 위한 한 방법으로 영상처리를 이용할 수 있다. 하지만 현재의 기술은 고성능에 초점이 맞춰있기 때문에 시스템 구현을 위해 비용 낭비가 발생할 수 있다. 따라서 본 논문에서는 셀프 동영상 촬영 분야의 적외선 영상처리 기반 저비용 사용자 추적 시스템을 제안한다. 실제 단순히 인식률을 측정한 결과 80%를 보였으며, 속도에 따라 1.5m/s에서 76%의 인식률을 보였다.

• Proceedings of the Korea Information Processing Society Conference
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• 2011.04a
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• pp.540-543
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• 2011

최근 멀티 터치 인터랙션을 반영한 인터랙티브 인터페이스에 대하여 많은 연구가 진행중에 있다. 손을 이용한 터치 인터랙션은 여러 가지 제약이 따르므로 본 논문에서는 증강현실 기술의 하나인 마커인식 인터페이스와 멀티 터치 인터랙션 인터페이스를 이용한 체감형 적외선 멀티 카드 터치 기반 인식 시스템을 제안한다. 이를 위해 DI기반의 인식 알고리즘을 적용하여 카드의 고유한 정보와 위치정보, 각도 등을 인식 할 수 있도록 하였다. 또한 사용자의 손 제스처 정보를 트래킹 하여 다양한 인터랙션 메타포를 제공한다. 다양한 인터랙션 메타포는 시스템에 높은 몰입감을 제공하여서 아케이드 게임기기 에도 활용이 가능하다.

• Journal of the Korea Society of Computer and Information
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• v.19 no.11
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• pp.43-52
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• 2014

In this paper, we propose the target detection method using image displacement, and classification method using SURF(Speeded Up Robust Features) feature points and BAS(Beam Angle Statistics) in infrared images. The SURF method that is a typical correspondence matching method in the area of image processing has been widely used, because it is significantly faster than the SIFT(Scale Invariant Feature Transform) method, and produces a similar performance. In addition, in most SURF based object recognition method, it consists of feature point extraction and matching process. In proposed method, it detects the target area using the displacement, and target classification is performed by using the geometry of SURF feature points. The proposed method was applied to the unmanned target detection/recognition system. The experimental results in virtual images and real images, we have approximately 73~85% of the classification performance.

• Journal of the Korean Institute of Intelligent Systems
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• v.24 no.4
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• pp.343-348
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• 2014

Face recognition system has advanctage to automatically recognize a person without causing repulsion at deteciton process. However, the face recognition system has a drawback to show lower perfomance according to illumination variation unlike the other biometric systems using fingerprint and iris. Therefore, this paper proposed a robust face recogntion method against illumination varition by slective fusion technique using both visible and infrared faces based on fuzzy linear disciment analysis(fuzzy-LDA). In the first step, both the visible image and infrared image are divided into four bands using wavelet transform. In the second step, Euclidean distance is calculated at each subband. In the third step, recognition rate is determined at each subband using the Euclidean distance calculated in the second step. And then, weights are determined by considering the recognition rate of each band. Finally, a fusion face recognition is performed and robust recognition results are obtained.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2011.07a
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• pp.432-434
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• 2011

얼굴을 인식하는 방법은 많은 연구가 이루어져 왔으며, 이를 통해 다양한 형태의 어플리케이션으로 보급되어 왔다. 특히, 사용자의 인식은 사용자와 시스템 간의 한 차원 높은 인터랙션을 제공하는 것이 가능하다. 본 논문에서는 사용자에게 내츄럴한 인터랙션을 제공하기 위해 적외선 영상과 컬러영상을 동시에 입력 받아 추출된 휴먼 영역을 이용하여 사용자의 얼굴 인식을 수행하고 특정 사용자에게만 인터랙션을 제공하는 인터페이스 구현 방법을 제안한다. 이를 위해, 간단하게 제작된 시스템을 통해 같은 시점의 적외선과 컬러 영상을 추출하여 조명 변화에 강인하게 얼굴과 손 영역을 인식한다. 이는 얼굴 인식을 기반으로 사용자를 분별하여 서비스 하는 것이 가능하여, 다양한 어플리케이션으로 향상된 서비스를 제공할 것으로 기대한다.