• Journal of the Institute of Convergence Signal Processing
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• v.11 no.4
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• pp.303-309
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• 2010

We proposes a new approach for testing the self visual-acuity by using the KS standard optotype. The proposed system provides their hand-gesture recognition method for the convenient response of subjects in the visual acuity measurement. Also, this system can measure a visual-acuity that excludes the examiner's subjective judgement or the subject's memorized guess, because of presenting a random optotype automatically by computer without a examiner. Especially, Our system guarantees the reliability by using the KS standard optotype and its presentation(KS P ISO 8596), which is defined by the Korea Standards Association in 2006. And the database management function of our system can provide the visual-acuity data to the EMR client easily. As a result, Our system shows the 98% consistency in the limit of the ${\pm}1$ visual-acuity level error by comparing the visual-acuity chart test.

• Journal of Korean Ophthalmic Optics Society
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• v.6 no.2
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• pp.99-104
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• 2001

This study surveyed common sense of testing eye vision, feeling of own vision and wearing glasses, and method of wearing glasses using questionnaire for 625 primary student(male 322, female 303) live in Iksan city, Jeon buk Province. The question about the selection of testing vision office answered ophthalmic optics only 12.6% by common sense but 38.8% among testing vision students had been checked the visual acuity in ophthalmic optics. 40% student of all answerer have a poor vision by self-evaluation testing and realized when they look far vision is 46.4% among the poor vision answerer, look black board is 26.0%, look monitor is 18.4%, and reading is 9.9%. 46% answerer of the subjective poor vision who tested eye vision by self-evaluation did not correct eye vision. 48.7% answerer among uncorrect eye vision is because of having no chance to test. The question of effect in wearing glasses answered that the 48% of a1l answerer will be worse the visual acuity, the other is getting better and unchanged eye vision by common sense. The question about how looks like glasses wearer answered that the 45.8% answerer is uncomfortable appearance by common sense. 32.3% answerer of the glasses wearer became a failure wearer because glasses was uncomfortable to fit primary student.

• Proceedings of the Korea Information Processing Society Conference
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• 2010.04a
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• pp.1082-1085
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• 2010

인간의 시력 측정을 위한 방법은 표준 시표(Optotype)에 따라 제작된 시표를 이용하여 검사자가 피검자를 측정하여 기록하는 방법이 대부분으로 컴퓨터 기반의 자가 검사가 가능한 시력 측정 시스템은 미흡한 실정이다. 또한 측정된 시력의 자동 데이터베이스에 의한 시력 관리 기능도 제공되지 않고 있다. 따라서 본 논문에서는 2006년에 국제규격(ISO 8596)에 따라 정의된 KS 표준 시표(한국 산업규격 P ISO 8596)와 시력 측정 방법을 참조하여 자가 시력 측정과 측정된 시력 데이터의 데이터베이스 관리가 가능한 컴퓨터 기반의 측정 시스템을 구현한다. 구현된 시스템은 피실험자를 대상으로 실제 시력표에 의한 시력 측정 방법과 비교 실험한 결과, 시력 측정에 있어서 객관성과 편의성을 보장하며 측정된 시력에 있어서도 데이터 관리의 유효성과 정확성을 보였다.

• Proceedings of the Korea Information Processing Society Conference
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• 2009.11a
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• pp.893-894
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• 2009

인간의 시력 측정을 위한 방법은 검사자를 필요로 하는 표준 시표 제작을 위한 수동적인 방법이 대부분으로 컴퓨터 기반의 자가 검사가 가능한 시력 측정 시스템 개발은 미흡한 설정이다. 따라서 본 논문에서는 2006년에 국제규격(ISO 8596)에 따라 정의된 KS 표준 시표(한국 산업규격 P ISO 8596)를 참조 한 컴퓨터 기반의 자가 시력 측정 시스템을 구현한다. 구현된 시스템은 란돌프 고리(Landolt's rings) 시표를 이용하여 측정거리에 제약이 없이 검사자의 주관적 판단이 배제된 시력 측정이 가능하며 효율적 사용자 인터페이스를 제공한다. 구현된 자가 시력 측정 시스템의 성능은 시력 측정자 100명을 대상으로 시력표에 의한 측정치와 비교 실험한 결과 시력 등급을 기준으로 87%의 일치도를 보였다.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.13 no.1
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• pp.121-127
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• 2013

A vision based hand-gesture interface method for substituting a pointing device is proposed in this paper, which is used the ratio and size variation of Gesture Region. Proposed method uses the skin hue&saturation of the hand region from the HSI color model to extract the hand region effectively. This method can remove the non-hand region, and reduces the noise effect by the light source. Also, as the computation quantity is reduced by detecting not the static hand-shape recognition, but the ratio and size variation of hand-moving from the clipped hand region in real time, more response speed is guaranteed. In order to evaluate the performance of the our proposed method, after applying to the computerized self visual acuity testing system as a pointing device. As a result, the proposed method showed the average 86% gesture recognition ratio and 87% coordinate moving recognition ratio.