• KIPS Transactions on Software and Data Engineering
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• v.5 no.11
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• pp.511-520
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• 2016

Automatic License Plate Detection (ALPD) is a key technology for a efficient traffic control. It is used to improve work efficiency in many applications such as toll payment systems and parking and traffic management. Until recently, the hand-crafted features made for image processing are used to detect license plates in most studies. It has the advantage in speed. but can degrade the detection rate with respect to various environmental changes. In this paper, we propose a way to utilize a Faster Region based Convolutional Neural Networks (Faster R-CNN) and a Conventional Convolutional Neural Networks (CNN), which improves the computational speed and is robust against changed environments. The module based on Faster R-CNN is used to detect license plate candidate regions from images and is followed by the module based on CNN to remove False Positives from the candidates. As a result, we achieved a detection rate of 99.94% from images captured under various environments. In addition, the average operating speed is 80ms/image. We implemented a fast and robust Real-Time License Plate Detection System.

• Journal of the Korean Orthopaedic Association
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• v.56 no.5
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• pp.440-444
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• 2021

In advanced gout, monosodium urate crystals are deposited in the joints and surrounding tissues, resulting in gouty tophi. A 45-year-old man was admitted to hospital due to pain and a limited range of motion in his right knee. Magnetic resonance imaging revealed a mass, and arthroscopic surgery and biopsy were then performed. Gouty tophi invading the anterior horns of the medial and lateral menisci were identified and surgically removed. To the best of the author's knowledge, there is no case report of intrameniscal gouty tophi invading both the medial and lateral menisci. This paper presents this case along with a review of the relevant literature.

• Transactions of the Korean Society of Mechanical Engineers
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• v.14 no.4
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• pp.937-944
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• 1990

본 연구에서는 파이프내에 부분 오리피스판을 장착하여 이 장애벽 전후에서 발생하는 유동현상을 박리 전단층의 유동구조와 재부착 경계층을 중심으로 실험적으로 연구하였다. 측정방법으로 유동의 속도장변화를 구하기 위하여 NMR 위상 영상법을 사용하였고, 과망간산칼륨을 염료로 가시화 실험을 수행하여 그 결과를 비교 검토하였 다.

• The Science & Technology
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• v.17 no.1 s.176
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• pp.22-25
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• 1984

자연식에도 발암물질있다 / 폐열이용 수경재배 / 레이저추적장치로 비행기연료 크게 절약 / 대기시간 신호표시판 / IBM, 조셉슨 소자 컴퓨터 연구중단 / 플라스틱 포도주병 / 택시의 컴퓨터 배차 / 영상을 기억하는 컴퓨터 등장 / 싼비용으로 백만불 미소를 / 로스알라모스연 소련여행 금지 / 자연질소의 바다로 덮인 트리톤

• Journal of Korean Electronics
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• v.10 no.9
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• pp.50-53
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• 1990

일렉트로닉스기기를 가정생활의 여러장면에서 활용해서 보다 쾌적한 생활을 목표로 하는 HA는 OA의 가정판인데 단순히 가사의 효율화를 지향하는 것만이 아니라 방범 ㆍ영상ㆍ통신ㆍ홈 쇼핑, 홈 뱅킹 등 풍부한 생활과 안전 대책을 전체적으로 실현 하는것을 목적으로 하고 있다.

• Journal of radiological science and technology
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• v.30 no.4
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• pp.407-417
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• 2007

The purpose of this study is to determine whether change of the lumbar intervertebral disc diameters and size is a risk factor for development of lumbar disc lesion and this changes are associated with aging. The L4-5 and L5-S1 intervertebral disc diameters and size were measured in 50 normal subjects and 50 low back pain patients in the age range $20{\sim}60$ by MRI. The data were analysed with independent t-test to differentiation between normal subjects and low back patients. We also analysed with one-way ANOVA, Pearson correlation and simple linear regression to differentiate between different age ranges. This study has shown that older subjects of both normal and low back pain patients have significantly larger transverse diameters and sizes of the L4-5 and L5-S1 intervertebral disc, compared with those of younger subjects. In addition, low back pain patients's disc sizes were larger than normal subjects but there was statistically no significant difference. The measurement of the intervertebral disc size can be considered as a clinically useful method for diagnosis of the low back pain and aging of the intervertebral disc. However, further study should be conducted to establish normal value of intervertebral disc size on large number of subjects.

• Journal of radiological science and technology
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• v.33 no.4
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• pp.335-340
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• 2010

This paper is about a projection method to check existence of radius groove penetration of screw after distal radius fracture operation using the T-type plate. Angle of Radius groove was analyzed by fifty one CT images that contains patients' wrist and twenty cases of radius specimens. After making radius phantom by plaster, we set the screw so that it penetrated 2.4 mm depth of radius groove. Then, we projected the phantom by X-ray in change of the elevation and supination angle of distal radius by 5 degree interval on 0~30 degree. The average value of groove angle in the wrist CT images was 14.4 degree and the radius specimens was 16.3 degree. Screws penetrating radius groove of the phantom have different lengths according to elevation angle and supination angle. Consequently, in order to confirm existence and nonexistence of radius groove penetration of the screw in tangential projection after distal radius fracture operation using the T-type plate, we recommend 5 degree of elevation angle and 20 degree of supination angle.

• Journal of Korea Multimedia Society
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• v.2 no.3
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• pp.297-307
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• 1999

A character recognition system, where a large amount of character images arrive continuously in real time, must preprocess character images very quickly. Moreover, information loss due to image trans-formations such as geometric normalization and thinning needs to be minimized especially when character images are small and noisy. Therefore, we suggest a prompt and effective feature extraction method without transforming original images. For this, boundary pixels are defined in terms of the degree in classification, and those boundary pixels are considered selectively in extracting features. The proposed method is tested by a handwritten character recognition and a car plate number recognition. The experiments show that the proposed method is effective in recognition compared to conventional methods. And an overall reduction of execution time is achieved by completing all the required processing by a single image scan.

• The Journal of Korea Institute of Information, Electronics, and Communication Technology
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• v.6 no.2
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• pp.95-100
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• 2013

Smart surveillance, is the use of automatic video analysis technologies in video surveillance applications. We present a robust object tracking method using pan-tilt-zoom camera for intelligent surveillance System, As the result of the experiment using 78 vehicle, the success rate of the tracking for moving object & non-moving object werw 97.4% and 91%. and 84.6%. the success rate o PTZ control for license plate image.

• The Journal of Korea Institute of Information, Electronics, and Communication Technology
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• v.1 no.2
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• pp.65-70
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• 2008

Smart surveillance, is the use of automatic video analysis technologies in video surveillance applications. We present a robust object tracking method using pan-tilt-zoom camera for intelligent surveillance System, As the result of the experiment using 78 vehicle, the success rate of the tracking for moving object & non-moving object werw 97.4% and 91%. and 84.6%. the success rate o PTZ control for license plate image.