• Proceedings of the Korean Information Science Society Conference
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• 2000.04b
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• pp.547-549
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• 2000

버전스 눈동자 운동은 사람과 스테레오 시각을 가진 척추동물로 하여금 양안에 의해 응시점이 맞추어진 관심있는 물체까지의 떨어진 거리를 인식할 수 있도록 해준다. 이러한 버전스 눈동자 운동을 양안 헤드아이 로봇에 구현하기 위해서, 우리는 disparity flow와 flux를 이용하는 제어 모델을 개발하였다. 실험 및 결과 분석은 본 모델이 다양한 환경에서의 버전스 눈동자 운동을 효율적으로 제어할 수 있음을 보여준다. 인식-행동 주기가 실시간 프레임율에 근접하게 되면, disparity flow와 flux의 정확도는 증가되고 헤드아이 로봇의 버전스 눈운동을 더욱 정밀하게 제어하는 것이 가능해질 것이다.

• 농업기술회보
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• v.49 no.4
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• pp.34-34
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• 2012

• Journal of Korean Ophthalmic Optics Society
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• v.10 no.4
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• pp.375-380
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• 2005

To assess convergence and accommodation at a short distance, 92 selected subjects without any ocular diseases by apperatuses of visual chart(Shinnippon CT30) and phoropter(Shinnippon VT 10) at a short distance(40 cm) were tested upon MEM retinoscopy(Welch Allyn, USA). BELL retinoscopy(Welch Allyn, USA), binocular accommodative facility (${\pm}2.00$ D flipper. Bernell Co., USA), vergence facility(prism flipper, Bernell Co., USA). There were such test results as MEM retinoscopy(R/L)($+1.05{\pm}0.87/1.02{\pm}0.80$ D). BELL retinoscopy ($17.89{\pm}12.12/17.94{\pm}11.72cm$), binocular accommodative facility (R/G)($7.69{\pm}6.48cpm$). binocular accommodative facility(polaroid)($11.76{\pm}5.22cpm$), monocular accommodative facility(R/L) ($13.9{\pm}6.27/13.8{\pm}5.96cpm$), vergence facility($13.5{\pm}6.40cpm$).

• Korean Journal of Cognitive Science
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• v.22 no.3
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• pp.235-254
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• 2011

Two experiments were conducted to investigate the impact of binocular disparity information on Neon color spreading (NCS). The stimuli was the modification of Ehrenstein figure used by Redies and Spillmann(1981); inner and outer segments were achromatic and middle segments was chromatic. In experiment 1, the effect of binocular disparity was tested in each segment that were divided inner, middle and outer segments. In experiment 2, the impact of added segments that were put in different depth place were tested. The results showed that the segments on same place were, the clearer the NCS was. Consistent with the previous studies, the effect of color segment in front or in behind was not appeared. The case of added segments, regardless of added segments were placed either front or behind, the NCS was reduced. But the effect of added outer segments was more affect then added inner segments. This results were suggested that NCS could be affected by depth information but more affected by stage of before depth processing.

• Korean Journal of Cognitive Science
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• v.21 no.1
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• pp.1-24
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• 2010

The stationary image appears to move after we view a moving stimulus for a long time. The motion aftereffect(MAE) can spread to an adjacent region if there is no contrast discontinuity between two regions. In this study, it is investigated whether a phenomenon of MAE spreading to an adjacent non adapting area is affected by the depth discontinuity defined by binocular disparity. In the first experiment a disparity defined slanted pattern was presented in an unadapted region, and in the second experiment, a disparity defined pattern with a different depth was presented on the fronto-parallel plane. Although MAE duration in the condition with slanted pattern was not different from that in the non-slanted pattern condition, MAE durations in the pattern presented on pronto-parallel plane was vividly reduced, but not completely disappeared. These results suggest that a phenomenon of MAE spreading might be affected by depth discontinuity, and could be occurred after binocular information converges.

• Korean Journal of Cognitive Science
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• v.13 no.2
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• pp.37-45
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• 2002

Despite dynamical retinal image changes caused by pursuit eye movements, we usually perceive the stable spatial properties of the environment suite successfully Helmholtz and his followers have suggested that the visual system coordinates the retinal and extraretinal eye position information to represent the spatial properties of the environment. However. there have been a significant amount of researches showing that this kind of mechanism may not operate perfectly, and the pursuit eye movement employed in those researches were limited to conjugate eye movements. When an observer tracks an object moving away from the observer with his/her eyes. the two eyes rotate in opposite direction. and this kind of disjunctive eye movement may produce undesirable binocular disparities for the objects in the background. The present study examined whether the visual system compensated for the undesirable binocular disparities caused by disjunctive eye movements with extraretinal eye position information. Although the target object was presented frontoparellely to the subjects. the subjects reported that the object was slanted toward (or alway from) them in consistent with the undesirable binocular disparities produced by the disjunctive eye movements. These results imply that the visual system may not perfectly compensate for the undesirable binocular disparities with extraretinal eye position information.

• Journal of Broadcast Engineering
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• v.10 no.1 s.26
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• pp.68-76
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• 2005

We propose a new type of stereoscopic camera system with a zoom lens module to overcome the backlash for the stability of picture matching and the difficulty of zoom control. This system is designed to control a pair of zoom lens with a rotation lever. In this paper, we present the structural characteristics of our proposed system, and verify that there are no image mismatching at acquired stereo images and the zoom in$\cdot$out is easy to control. In our experiments, we achieve good results that a convergence control is very simple and distortion of images is decreased.

• Journal of Korean Ophthalmic Optics Society
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• v.14 no.4
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• pp.71-75
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• 2009

Purpose: This study was designed to investigate the condition of refractive correction and heterophoria and monocular pupillary distance on myopic elementary school children wearing glasses in Gwangju city. Methods: Subjective refraction and objective refraction were examined after investigating heterophoria and monocular pupillary distance on 145 (290eye) elementary school children wearing myopia-corrected glasses. Results: 1. Anisometropia > 2.00 D was present in 4 children (3%). 2. 9 anisometropia (47%) were present in 19 undercorrected visual acuity boy wearers. and 16 anisometropia (64%) were present in 25 undercorrected visual acuity girl wearers. 3. Among the 67 myopic glasses boy wearers, the distance between optical centers was coincided with the pupillary distance in 30% (Oculus Uterque), and discrepant in 70% (Oculus Uterque). Among the 78 myopic glasses girl wearers, the distance between optical centers was coincided with the pupillary distance in 23% (Oculus Uterque), and discrepant in 77% (Oculus Uterque). The mean optical center distance was longer than the pupillary distance on both boy and girl wearers 4. The result of measured heterophoria revealed 14% for orthophoria, 63% for exophoria, 23% for esophoria at far distance and 10% for orthophoria, 76% for exophoria, 14% for esophoria at near distance. Conclusions: Correct refractive test and monocular pupillary distance must be examined because incorrect refractive test and pupillary distance induce asthenopia and heterophoria.

• Journal of Digital Convergence
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• v.18 no.10
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• pp.95-105
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• 2020

The Hong Kong issue covered in the study refers to the problems caused by the various measures and policies taken by the Chinese government since Hong Kong's return to China on July 1, 1997, and the resistance and resistance shown by the Hong Kong people. Since Hong Kong's return The Chinese government carried out a policy of strengthening direct control over Hong Kong, and on June 30, 2020, the Standing Committee of the National People's Congress of China passed the Hong Kong National Security Act. This study will focus on the impact of the Hong Kong issue on Cross-Strait Relations. Through this, we will take a look at the application of the "one-country, two-system" policy, Taiwan and China's Unification Issues and the democratization of Hong Kong. This study predicts that after the passage of the "Hong kong National security law," the principle of "one-country, two-system" that China tried to apply to unification with Taiwan will be put into a big test, and that Cross-Strait Relations and U.S.-China relations will deteriorate. Tension will quickly arise around Northeast Asia in the future, and we should also analyze and prepare for it in various ways.

• The Journal of the Convergence on Culture Technology
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• v.9 no.1
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• pp.161-168
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• 2023

Recently, China-Taiwan relations are facing a crisis, and at the same time, the U.S.-China relationship and the structure of Northeast Asia are greatly shaken, so we should pay attention to changes in cross-strait relations. This study aims to predict how cross-strait relations will change after the party convention by analyzing Xi Jinping's Taiwan policy, focusing on the "Political Report" of the 20th party convention and the content analysis of leadership personnel. The results of the study are as follows. First, as the amendment to the party constitution announced after the closing of the party convention stipulates the possibility of armed invasion, Xi Jinping will implement a tough Taiwan policy emphasizing unification. Second, strategic competition with the United States will continue to intensify in the future when analyzing the contents of Chapters 2, 11, 13, and 14 of the "Political Reporting" and the personnel management of diplomatic and security leadership. As a result, cross-strait relations are expected to show instability for a considerable period of time. Third, at a time when Taiwan rejects the unification plan of "one country, two systems" and the tendency to de-Chineseize is strengthening, there is a possibility that legislation or specific enforcement ordinances will be enacted to strengthen the existing "Anti-Secession Law." Fourth, it is expected that strong and warm two-sided strategies will be used together, such as taking a strong response to external forces interfering with the Taiwan issue and Taiwan independence forces, and using incentives for the Kuomintang(KMT) and Taiwanese who are friendly to unification.