• Proceedings of the Korean Society of Computer Information Conference
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• 2018.01a
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• pp.37-38
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• 2018

본 논문에서 제안하는 시각장애인용 스마트장갑은 시각장애인들이 지팡이를 사용할 때 발생하는 불필요한 접촉을 방지하고, 초음파센서를 이용해 전방의 장애물을 탐지하여 서보모터를 이용해 손등을 두드려 장애물의 유무를 알려준다. 또한 손가락에 있는 정전식 근접 터치 모듈은 손가락끼리 접촉하였을 때 블루투스로 연결된 스마트폰의 특정 어플리케이션을 실행하여 길을 잃거나 긴급 상황이 발생 했을 때 시각장애인도 불편함 없이 문자나 전화를 이용할 수 있도록 고안하였다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2023.07a
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• pp.457-458
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• 2023

본 논문에서는 실시간 영상처리 라이브러리인 OpenCV와 YOLO를 활용하여 사용자가 횡단보도 보행 시 안전을 제공해 주는 시스템을 개발하였다. 객체 인식 알고리즘인 YOLOv4-tiny를 이용하여 Ubuntu 환경에서 구현하였다. 데이터 셋은 인도 보행 영상 데이터 셋을 이용하였고 하드웨어는 Jetson Nano를 이용하여 구현하였다. 신호등의 색에 따른 보행 가능 여부를 카메라를 이용하여 전방의 장애물을 음성신호를 이용하여 사용자에게 전달한다. 제안된 시스템은 횡단보도와 신호등, 자동차와 같은 도로 위의 객체들로 설계된 알고리즘을 이용해 다양한 곳에서 사용이 가능하여 활용도가 높을 것으로 예상된다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2014.07a
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• pp.405-406
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• 2014

도시의 복잡성이 증가할수록 장애인의 외출은 많은 제약을 받는다. 특히 시각장애인들은 사물뿐만 아니라 사물 주위의 환경을 인지할 수 없어 야외 활동을 하는데 있어 수많은 환경적 어려움을 겪는다. 하지만 현재 국내의 야외 환경은 시각장애인을 포함한 장애인들의 활동을 보조하는 정책적, 수단적 시설이 많이 부족한 것이 현실이다. 이에 본 논문에서는 시각장애인의 야외 활동에 도움을 줄 수 있는 길안내 시스템을 제안한다. 제안한 시스템은 시험을 위해 한국교통대학교 증평캠퍼스에 적용하였다.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.21 no.1
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• pp.99-106
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• 2017

Audible Pedestrian Signal(APS) is an additional equipment to provide information about pedestrian signals in non-visual formats such as audible tones and verbal messages. It can provide information to pedestrians about the location and directions of a crosswalk, and the traffic signal status. In general, a pedestrian who is visually impaired uses a 358.5MHz wireless remote controller to activate the APS and crosses at the crosswalk with the help of the APS. The existing APS can only receive an activation message from the remote controller. Therefore, the APS has an issue, especially at intersections, that all APSs within the communication range of the remote controller are activated simultaneously. It makes to confuse the visual impaired pedestrians. In this paper, we propose a BLE-enabled APS that can enable two-way communication via Bluetooth with a smartphone. The proposed system solves the problem and provides them with additional information, so that visually impaired pedestrians can cross at the crosswalk more conveniently.

• Journal of the Korean BIBLIA Society for library and Information Science
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• v.32 no.3
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• pp.285-304
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• 2021

The study has a purpose of understanding the factors that affect the oranizational commitment of the employees working in the libraries for visually impaired. To do this, the study chose personal background, emotional labor, role, job characteristics, organizational culture and organizational justice and attempted to find out how these factors affect the oranizational commitment. As a research method, mixed study method was used where quantitative analysis was complemented by qualitative analysis. For quantitative analysis, statistical analysis was conducted using the retrieved questionnaires. For qualitative analysis, the researcher had a one-on-one talk with the experts and employees who want to participate using an interview note was recomposed based on the survey responses. In the study results, emotional labor, job characteristics, organizational culture and organizational justice was proven to have influence on job engagement. To improve the job engagement, autonomy should be guaranteed by minimizing the organizational intervention to the assigned works and expanding the discretionary power. Furthermore, intensive management of the employees' emotional labor and fair process regarding the work performance is highly important.

• The Korean Journal of Archival Studies
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• no.40
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• pp.181-223
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• 2014

This study aims to present a Braille Library document creation and management status, and to identify ways to improve. This research field surveys and interviews were conducted three institutions, the quality requirements of the ISO 15489 standards. As a result, the Braille Library document management improvement plan is as follows. First, the policy and regulatory maintenance is needed. Copy of the regulations on the creation and management, access rights and related document management policies should be developed. Second, the document creation process needs to be improved. Electronic approval system responsible for the creation of persons who are visually impaired, visually impaired people can read documents created during document creation, and introduced measures and braille labels on the files attached to will have to be prepared. Third, the document management process needs to be improved. Changes in the creation copy of the records, and preserved along with the preservation of the original and the copy to have the same period, appointed to manage one set of all copies of the authentic copy of the plan is also required. Finally, for document management system should be introduced. Systematic document management system that can be introduced is required. This system will be designed to be accessible to the visually impaired, the search.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2021.10a
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• pp.388-390
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• 2021

This paper introduces a system that can help visually impaired people to board a bus using an embedded board with keypad, dot matrix, lidar sensor, NFC reader, a public data portal Open API system, and deep learning algorithm (YOLOv5). The user inputs the desired bus number through the NFC reader and keypad, and then obtains the location and expected arrival time information of the bus through the Open API real-time data through the voice output entered into the system. In addition, by displaying the bus number as the dot matrix, it can help the bus driver to wait for the visually impaired, and at the same time, a deep learning algorithm (YOLOv5) recognizes the bus number that stops in real time and detects the distance to the bus with a distance detection sensor such as lidar sensor.

• The Journal of the Korea institute of electronic communication sciences
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• v.12 no.4
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• pp.533-538
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• 2017

In this thesis, the ambulatory aid mechanism was implemented so that blind people could be safer at risk of walking outdoors. Using ultrasonic sensors, the obstacles can be detected when the distance between the obstacle is within 50 cm of the obstacle. If the light sensor becomes less than 25 lux, the LED will automatically turn on and help the safety of the visually impaired and the security of sight of the peripheral walkers. Color recognition sensors increase the rate of recognition of yellow color by the detection distance is 1cm, it vibrated when yellow light was detected. Using GPS with 7.3 m of error range, the guardian was able to check the location of the visually impaired.

• The Journal of Korea Institute of Information, Electronics, and Communication Technology
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• v.17 no.1
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• pp.67-75
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• 2024

Crosswalks play an important role for the safe movement of pedestrians in a complex urban environment. However, for the visually impaired, crosswalks can be a big risk factor. Although assistive tools such as braille blocks and acoustic traffic lights exist for safe walking, poor management can sometimes act as a hindrance to safety. This paper proposes a method to improve accuracy in a deep learning-based real-time crosswalk detection model that can be used in applications for pedestrian assistance for the disabled at the beginning. The image was binarized by utilizing the characteristic that the white line of the crosswalk image contrasts with the road surface, and through this, the crosswalk could be better recognized and the location of the crosswalk could be more accurately identified by using two models that learned the whole and the middle part of the crosswalk, respectively. In addition, it was intended to increase accuracy by creating a boundary box that recognizes crosswalks in two stages: whole and part. Through this method, additional frames that the detection model did not detect in RGB image learning from the crosswalk image could be detected.

• Journal of the Korean BIBLIA Society for library and Information Science
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• v.31 no.3
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• pp.191-211
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• 2020

The main purpose of this research is to identify limitations and problems in access to information using reading aids devices for the visually impaired and to suggest ways to activate the use of alternative materials using reading aids devices. A survey was conducted on adults with visual impairment in order to identify the factors of limitation in using reading aids devices. The analysis resulted in six aspects of limiting factors in activating the use of reading aids devices. The approaches for activating the use of reading aids devices were proposed by dividing them into policy and operational aspects, focusing on the limiting factors derived. Policy aspects suggested developing low-cost reading aids devices, increasing awareness of the devices, and complying with Web standard guidelines for improving the applicability of the devices, while operational aspects suggested reinforcing hearing-use functions, expanding information services related to reading aids devices, and enhancing portability of the devices.