• Journal of Korea Multimedia Society
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• v.13 no.4
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• pp.512-525
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• 2010

A PDP(Plasma Display Panel) Frame is critical part of PDP and also produces couple hundred thousand every month. In the process of mass production, product inspection is very important process. Also to increase the reliance, inspection each part and every final product is asked quite often. Purpose of this paper is to use computer vision system to inspect the PDP parts which is Automated visual process inspection. This paper contains the system design for inspecting defects of hole, tab, stud, rivet of PDP Frame. The system also can inspect various kinds of PDP frames. Quick and accurate 100% inspection of all shapes can improve the manufacturing productivity. Inspection results can be stored in a database and analyzed to find the cause of defects. After applying the system to the industry, the result shows the possibility of fast and accuracy of the inspection.

• The Journal of Korean society of community based occupational therapy
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• v.3 no.2
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• pp.25-32
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• 2013

Objective : The purpose of this study was to investigate the effect of the ankle movement and the balance when the elderly conducted self-exercise with ankle movement control device through visual feedback. Method : This case-study included pre-test and post-test. The elderly women aged 80 did self-exercise for 20 minutes both morning and afternoon every day. The pre-test and post-test was conducted tracking test for evaluating ankle control movement and running time measurement of standing on one foot and Timed up-And-Go test for balance. Result : The subject improved the ankle control movement on tracking test and improved the balance in running time measurement of standing on one foot. But, Timed up-And-Go test was no change. Conclusion : The self-exercise with device of ankle movement control through visual feedback improved the ankle control movement and the balance for elderly.

• The KIPS Transactions:PartA
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• v.13A no.5 s.102
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• pp.399-404
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• 2006

In Jana 2, to enforce a suity policy of a program, programmer writes permission sets required by the code at the policy file, sets Security Manager on system and executes the program. Then Security Manager checks by stack inspection whether an access request to resource should be granted or denied whenever code tries to access critical resource. In this paper, we develop a visualization tool which helps programmers enforce security policy effectively into programs. This system is based on the static permission check analysis which analyzes permission checks which must succeed or fail at each method. Based on this analysis information, programmer can examine visually how permission checks and their stack inspection are performed. By modifying program or policy file if necessary and examining analysis information repeatedly, programmer can enforce security policy correctly.

• The Journal of Korean society of community based occupational therapy
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• v.3 no.1
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• pp.67-75
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• 2013

Objective : The purpose of study was to visual scanning program on the effect of visual memory in stroke patients. Method : A single subject experimental research with ABA design was employed in this study. The experiment composed of 15 sessions in total: 5 sessions for baseline, 7 session for visual scanning program, and 3 sessions for the second baseline. Each session for intervention took 30 minutes daily. MVPT, CNT(visual span test, visual learning test) were used for assessment visual perception, visual memory. Result : After visual scanning program, changing faster processing time MVPT 5.5 seconds to 4.5 seconds. Also all itme raw score changes of CNT visual span test, visual learning test. Conclusion : Visual scanning program in stroke patients give a positive impact on the visual memory. To improve stroke patients' perception visual scanning program utilizing visual perception research as well as training programs for a variety of looks forward to being developed.

• 재활복지
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• v.21 no.1
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• pp.27-46
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• 2017

The purpose of this study is to develop tool for the assessment of employment preparedness for people with visual impairments. First, we developed a draft assessment factors. Expert opinion survey, delphi survey, pilot test were conducted to modify contents of the factors. Actual assessments were carried out to test the reliability and validity of the developed tool targeting job seeker with visual disabilities. The total number of valid samples are 253. Principal component analysis, confirmatory factors analysis, and correlation analysis were used for the validity test. Chronbach' alpha analysis was used for the reliability test. As a result of the reliability analysis, the reliability coefficient showed good level of 0.88-0.92. As a result of the factor analysis, it was confirmed that the composition concept of 9 factors were well reflected. The correlation coefficient between employment preparedness tool and job screening tool was 0.501, Which was statistically significant. Therefore, it was evaluated as having a concurrent validity. Finally, it was confirmed that the assessment of employment preparedness for people with visual impairments was valid as assessment tool.

• Proceedings of the Korean Information Science Society Conference
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• 2011.06a
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• pp.320-323
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• 2011

최근 전자기술의 발달로 인해 인쇄 회로 기판(Printed Circuit Board)이 정밀화되고 세분화됨에 따라 고도로 집약되어 육안에 의한 시각검사 방법이 어려워지고 있다. 이에 따라 컴퓨터 시각 기술을 이용한 자동시각검사가 점차 늘어가는 추세다. 이러한 PCB의 설계 또는 검사 시 참조할 이미지를 만드는 방법 중 하나로 Gerber Interface로 표현된 PCB용 CAD파일인 거버파일을 이용하여 디지털 이미지를 생성하는 법이 널리 이용되고 있다. 반면 이러한 파일 및 이미지는 상호간에 인과관계(causality)를 가지며, 이미지 유출시 그 피해가 크다. 따라서 생성된 이미지를 효과적으로 보호하고 관리해야할 필요가 있다. 본 논문에서 상기의 인과관계를 이용하여 이를 관리하고 보호하는 이미지 권한관리 기법을 제안한다.

• Proceedings of the Korean Information Science Society Conference
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• 2001.10b
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• pp.430-432
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• 2001

일반적으로 안과 의사들과 안경사 등을 포함하는 시각 관련 전문가들은 시력 피검자에 대한 굴절력 측정시 약 30% 이상의 오류율을 가진다고 한다. 이는 검사를 행하는 전문가의 비 숙련도에 기인한다기보다는 그만큼 시각 관련 측정이 유동적이고 민감해서 정확한 측정값을 얻어내는 것이 어렵다는 것을 말해주는 것이다. 만약 자동화된 시스템이 광학계로부터 나오는 영상을 이용하여 내부 처리를 거친 후 정확한 시각 측정치를 검사자에게 알려줄 수 있다면 잘못 측정되는 측정 횟수를 크게 줄일 수 있을 것이다. 본 연구는 형태학적 필터링(morphological filtering)과 그레이-레벨의 신호 강조(signal enhance) 기술들을 이용한 자동 시각 굴절력 측정 시스템을 개발하였다. 본 시스템에서는 광학계로부터 도출된 영상으로부터 첫째로 형태학적 필터링 처리를 행한다. 이 과정은 처리가 어려운 원 영상을 좀 더 다루기 쉬운 상태로 바꿔주는 역할을 하게 된다. 둘째는 일차 처리된 영상에 가해주는 그레이 수준 한계 기법을 통한 신호 강조 기법으로서 이는 영상의 그레이 값 분포가 다양함으로 인해서 발생되는 오차를 줄이기 위해서 사용된다. 그리하여 본 시스템은 정확한 측정값 도출이 어려운 시각 영상에 적용되어 효과적으로 오차를 줄임으로써 보다 효율적인 시각 측정을 가능하게 하였다.

• Journal of Korea Multimedia Society
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• v.13 no.3
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• pp.392-399
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• 2010

The Automobile has developed and changed through the years from the invention and increased human-being's scope of activity. Junction Box, one of the part of automobile, is inspected by human eyes which caused mistakes and slow progress. To achieve the speed and accuracy the system was compensated by vision system which is inspecting automatically. This paper is automatic inspection of fuse and relay which is inserted in the junction box by checking the color and pattern of the cover. After checking the performance of the system by using the junction box, the result was 100 percent perception and open the possibility to inspect junction box fast and easy and accurate if it is applied to the industry.

• Communications of the Korean Institute of Information Scientists and Engineers
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• v.11 no.5
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• pp.94-103
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• 1993

• Journal of the Korea Institute of Information and Communication Engineering
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• v.10 no.4
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• pp.667-673
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• 2006

In this paper, we present a visual inspection system for a CoG using statistical features. After rotational error of an input image is compensated using Hough transformation, an inspection area is obtained by using projection method. Then the final result is derived from statistical features of segmented pad areas.