• The Journal of Korea Robotics Society
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• v.2 no.2
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• pp.137-142
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• 2007

In an information-oriented society, visually impaired persons also should obtain the information with relative ease. They tend to receive the information of letters by tactile sensation through braille display systems. Several types of braille display systems have been suggested so far, but none of them have been widely used yet. The braille display system should provide multiple lines of braille units to improve the level of understanding. In this paper, we propose a cell type braille unit with $3{\times}2$ dots, each of which consists of a piezoelectric linear motor. A braille cell is small and lightweight enough to be portable, and it can be easily assembled in multiple lines. The preliminary tests using the proposed braille display system show that it can provide the information that can be well perceived by visually impaired persons.

• ETRI Journal
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• v.36 no.5
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• pp.696-703
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• 2014

In this paper, we present a walking guidance system for the visually impaired for use at subway stations. This system, which is based on environmental knowledge, automatically detects and recognizes both exit numbers and arrow signs from natural outdoor scenes. The visually impaired can, therefore, utilize the system to find their own way (for example, using exit numbers and the directions provided) through a subway station. The proposed walking guidance system consists mainly of three stages: (a) sign detection using the MCT-based AdaBoost technique, (b) sign recognition using support vector machines and hidden Markov models, and (c) three verification techniques to discriminate between signs and non-signs. The experimental results indicate that our sign recognition system has a high performance with a detection rate of 98%, a recognition rate of 99.5%, and a false-positive error rate of 0.152.

• Proceedings of the IEEK Conference
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• 2002.07a
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• pp.389-392
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• 2002

In this paper, we implemented system to detect obstacle in that develop a guidance robot for the visually impaired through sound. We used ultra sonic sensor to detect obstacle. We supposed the algorithm that classifies distance and direction of obstacle using information that produce correct warning negative sign according to direction and distance of obstacle. According to the experiment, a reagent could detect obstacle without sight information.

• Proceedings of the KIEE Conference
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• 2002.11c
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• pp.130-133
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• 2002

In this paper we suggest Inertial navigation system(INS) for the guidance robot for the visually impaired. we use 3 gyroscopes and 3 accelerometers and calculate using pentium III computer, we can acquire altitude and position of the guidance robot using this system.

• IEMEK Journal of Embedded Systems and Applications
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• v.13 no.2
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• pp.73-81
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• 2018

This paper describes a device platform which the blind can wear to keep path and to get surrounding information during their independent walking. Compared to the existing technologies, the proposed device could be used indoors and outdoors, and maps need not be provided in advance. It is composed of a glasses type device equipped with image sensors, and a portable device that analyzes sensor data for sighted guiding. RGB images and depth images are extracted to generate a walking map based on feature points. It also can cope with the risk of collision with bollard, color cone by applying vertical obstacle detection technology based on floor detection.

• Journal of the Korean Institute of Rural Architecture
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• v.26 no.2
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• pp.17-25
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• 2024

This study is to use B.F. certification standards to identify the application and differences of B.F. facilities according to various approaches, and to use the analysis results as basic data for the expansion and renovation of new facilities, the National University (Jeonnam University Library), which underwent remodeling before the implementation of the certification system, and the two newly established private universities (Joseon University Library) that were subject to legal application before the implementation of the certification system. First, Chosun University met more B.F. certification standards than Chonnam National University, and mainly intermediary facilities belonged to the best to the best. Second, Chosun University and Chonnam National University's internal facilities met many B.F. certification standards, and Chonnam National University had many areas to improve and found areas to remodel. Third, information facilities at Chonnam National University and Chosun University only had facilities for the hearing impaired, and there were no information facilities for the visually impaired. Facilities for the visually impaired had to be installed, and compared to Chosun University, Chonnam National University fell short of the B.F. certification standard, so there were many areas that needed to be remodeled.

• International Journal of Advanced Culture Technology
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• v.6 no.1
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• pp.50-59
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• 2018

Generally, disabled people have a lot of bad health status at low income levels, the need for health care is higher than for non-disabled people. Although the number of persons with disabilities is increasing with each passing year, their medical services and support are still limited and limited. This problem is not so different from approach to medical information. Conventional medical information is usually printed and transmitted to the patient, but visually impaired people have difficulty accessing such printed information. In the case of the visually impaired, there are many cases where it is not possible to read not only the printed letter but also the braille because the acquired incidence is high. Therefore, this paper tried to solve this problem by transmitting the information of medicine by voice using RFID. In addition, ontology was used to select more accurate drug information. Currently, there are drug information sites provided by the Ministry of Health and Welfare. However, since duplicate information is scattered on these sites, the ontology was used to build up the database.

• Proceedings of the Korea Contents Association Conference
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• 2008.05a
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• pp.152-156
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• 2008

The public concept of digital broadcasting is all about anytime, anywhere and anyone. It implies that the viewing rights of digital broadcasting have to be blessed with anyone, in anywhere and at anytime. Here anyone connotes the notion included visually and hearing impaired viewers as well as the non-disabled. Considering the current circumstance, which is a milestone of digital switchover by 2012, it seems destitute of the accessibility for the disabled. Hence this study is to manage the embodiment of broadcasting accessibility in digital interactive services originated from W3C for impaired viewers in order to cotton to the unlimited contents on digital television.

• Proceedings of the Korean Society of Computer Information Conference
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• 2021.01a
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• pp.181-182
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• 2021

시각장애인이 길거리에 나설 때 주변에 보행 안전을 위한 시설이 많이 부족하다. 본 연구에서는 시각장애인에게 전방의 장애물을 알려주어 안전한 보행을 위한 스마트 지팡이를 제안한다. 초음파센서를 통하여 사물을 감지하여 진동으로 보행자의 진로 방향을 안내하며 조도 센서를 통하여 다른 사람들이 원거리에서 인식 할 수 있게 발광 기능을 포함한다. 또한, 긴급버튼을 통하여 비상시 보호자에게 알릴 수 있는 통보기능도 내장하고 있다. 향후 소형화와 지능화를 통하여 사회적 약자인 시각장애인의 안전한 보행권을 확보할 수 있는 기술로 발전시키고자 한다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2015.10a
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• pp.664-665
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• 2015

최근 IT기술이 점점 발달함에 따라 장애인의 일상생활을 편리하게 하는 도구들이 속속 개발되고 있다. 본 연구에서는 시각장애인들이 색상판별을 진동을 통해 감지할 수 있는 시스템을 개발하였다. 이것은 최근 대중화되고 있는 사물인터넷(IoT)의 기반이 되는 아두이노 기술을 접목하여 다양한 스위치와 센서로 입력 값을 받아들여 LED, 모터와 같은 외부출력장치를 제어함으로써 상호 작용을 만들어 낼 수 있는 시스템이다. 구체적으로 제안하는 시스템은 컬러센서를 통해 색상을 감지하고 색상 값을 수치 값으로 읽어 들이고 수치 값에 진동의 세기 주기 등을 달리함으로 시각장애인이 색상을 판별할 수 있도록 되어있다.