• ETRI Journal
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• v.37 no.2
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• pp.251-261
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• 2015

We present a novel method for real-time automatic license plate detection in high-resolution videos. Although there have been extensive studies of license plate detection since the 1970s, the suggested approaches resulting from such studies have difficulties in processing high-resolution imagery in real-time. Herein, we propose a novel cascade structure, the fastest classifier available, by rejecting false positives most efficiently. Furthermore, we train the classifier using the core patterns of various types of license plates, improving both the computation load and the accuracy of license plate detection. To show its superiority, our approach is compared with other state-of-the-art approaches. In addition, we collected 20,000 images including license plates from real traffic scenes for comprehensive experiments. The results show that our proposed approach significantly reduces the computational load in comparison to the other state-of-the-art approaches, with comparable performance accuracy.

• International journal of advanced smart convergence
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• v.3 no.1
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• pp.7-10
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• 2014

Upbringing requires an active intervention in the process of children growing up. Convergence in technology and media makes it possible to augment nurturing by making blended infrastructures with new digital resources available in learning environments at schools. A game-based provision of educationally-valuable content within a collective, virtual environment combined with an analysis of events in the game after it has been played (blended nurture environment) may help to better communicate human values especially where old-fashioned discussion methods fail or do not fulfill the promise of effective, educational institution-based methods of bringing up. This is where life sciences, psychology, media, pedagogy and technology (need to) converge.

• Carbon letters
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• v.19
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• pp.32-39
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• 2016

In this work, we studied the effects of electrochemical oxidation treatments of carbon fibers (CFs) on interfacial adhesion between CF and epoxy resin with various current densities. The surface morphologies and properties of the CFs before and after electrochemical-oxidation-treatment were characterized using field emission scanning electron microscopy, atomic force microscopy, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and single-fiber contact angle. The mechanical interfacial shear strength of the CFs/epoxy matrix composites was investigated by using a micro-bond method. From the results, electrochemical oxidation treatment introduced oxygen functional groups and increased roughness on the fiber surface. The mechanical interfacial adhesion strength also showed higher values than that of an untreated CF-reinforced composite.

• ETRI Journal
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• v.32 no.5
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• pp.761-765
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• 2010

In this paper, we introduce an improved adaptive boosting (AdaBoost) classifier and its application, a disguised-face discriminator that discriminates between bare and disguised faces. The proposed classifier is based on an AdaBoost learning algorithm and regression technique. In the process, the lookup table of AdaBoost learning is utilized. The proposed method is verified on the captured images under several real environments. Experimental results and analysis show the proposed method has a higher and faster performance than other well-known methods.

• Proceedings of the Korea Information Processing Society Conference
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• 2017.04a
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• pp.433-435
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• 2017

본 논문은 영상 장치를 이용한 자동화 시스템으로 용접 시 발생하는 용접 비드 정보 검출 방법에 대한 연구이다. 조명시스템과 결합된 2D 비전 카메라를 이용하여 용접된 시료 영상을 획득하고 영상처리과정을 거처 비드 부분만 획득한다. 획득된 비드 폭의 길이와 기공과 같이 용접 불량 상태 등의 정보 얻는다. 이 정보들과 산업체에서 요구되는 기준과 비교하여 정상적인 용접이 이루어 졌는지를 판별한다.

• Proceedings of the KIEE Conference
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• 2009.07a
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• pp.1823_1824
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• 2009

원자력 발전소 운전과정에서 발생하는 각종 폐액은 저장/여과 과정을 거치게 된다. 이러한 폐액의 저장/여과 과정에서 탱크 내에 침적된 방사성 슬러지들은 농축 고화 처리가 요구 되며 방사선량에 따라 작업자의 접근이 제한적이다. 본 논문에서는 탱크나 섬프(Sump)내의 방사성 슬러지를 제거하기 위하여 개발 중인 로봇의 기능과 이를 이용한 슬러지 제거 기초실험 결과를 제시한다.

• ETRI Journal
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• v.35 no.6
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• pp.1021-1028
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• 2013

Automatic facial expression recognition is a widely studied problem in computer vision and human-robot interaction. There has been a range of studies for representing facial descriptors for facial expression recognition. Some prominent descriptors were presented in the first facial expression recognition and analysis challenge (FERA2011). In that competition, the Local Gabor Binary Pattern Histogram Sequence descriptor showed the most powerful description capability. In this paper, we introduce hybrid facial representations for facial expression recognition, which have more powerful description capability with lower dimensionality. Our descriptors consist of a block-based descriptor and a pixel-based descriptor. The block-based descriptor represents the micro-orientation and micro-geometric structure information. The pixel-based descriptor represents texture information. We validate our descriptors on two public databases, and the results show that our descriptors perform well with a relatively low dimensionality.

• ETRI Journal
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• v.35 no.6
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• pp.1094-1104
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• 2013

Home appliance manufacturers have recently been trying to provide smart products capable of various Internet services. For example, one health care manufacturer provides a Wi-Fi-capable scale. Once users register their information with the manufacturer's server, their weight and body fat records are automatically uploaded to the server whenever they measure their weight. The users can then watch and check their weight log easily using a smart device, such as a smartphone or tablet. One of the biggest problems, however, is that the initial configuration of the appliances and the user registration process may be quite complicated to typical users who are unfamiliar with such IT devices. This paper proposes an autoconfiguration system structure and protocol for Internet-capable home appliances, which supports the initial configuration and remote maintenance service of the device with only little user effort. Manufacturers can develop their own information appliances and provide differentiated services using the proposed system and protocol.

• Journal of the Korean Chemical Society
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• v.59 no.5
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• pp.466-470
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• 2015

• Proceedings of the Korea Contents Association Conference
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• 2013.05a
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• pp.431-432
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• 2013

본 연구는 기존에 운영 중인 항만건설통합정보시스템의 활용성과 시스템 운영관리의 효율성을 높이기 위해 시스템을 통합화하였다. 도로와 항만 건설사업관리는 대상목적물만 다르고 기본적인 업무프로세스는 유사하다. 따라서 통합 개발기간을 단축하고 안정적으로 통합화하기 위해 항만건설통합정보시스템을 기존에 운영하고 있는 도로건설사업관리시스템으로 통합하는 방식으로 추진하였다. 도로건설사업관리시스템은 항만건설통합정보시스템보다 시스템 사용이 쉽고 편리하며 건설사업관리 업무프로세스 지원 및 관리기능이 안정적으로 설계되었다. 본 연구는 시스템 통합화 과정에서 겪었던 애로사항과 이를 해결하기 위한 방안을 제시하였다. 타 시스템을 통합화할 경우에 본 연구 결과를 활용한다면 반복적인 시행착오를 미연에 예방할 수 있을 것으로 사료된다.