• Title, Summary, Keyword: Vision

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Effects of Myopia Alleviation Lenses in accordance with Parents' Refractive Errors (부모의 굴절이상에 따른 근시완화렌즈 효과)

  • Cho, Yoon Chul;Kang, JoongGu;Leem, Hyun Sung
    • The Korean Journal of Vision Science
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    • v.20 no.4
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    • pp.569-577
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    • 2018
  • Purpose : The study looked at how effective each group wearing MyoVison lens, MC lens, and Single Vision lensdepending on their parents' myopia condition. Methods : The study observed the changeof spherical equivalent among customers, who visited between January 2010 and December 2016,of an optical shop in Incheon Metropolitan City. And we observed MyoVision 152 eyes, MC Lens 86 eyes and Single Vision lens 270 eyes. This study was conducted using SPSS ver18, which analyzes the changes in average values of MyoVision, MC Lens, and Single Vision for a year.In each group, the differences in the group were compared using the Paired T-test and then one-way ANOVA (post-hoc; Bonferroni) Results : Group-to-group comparisons showed that MyoVision and MC Lens have a shorterinhibition than Single Vision. In particular, MyoVisionand MC Lens showed different relief effects depending on the degree of refraction of parents.When both parents had normal refractive, the change between MyoVision and Single Vision lens was $-0.35{\pm}0.05D$. When the father had a refraction MC lens were $-0.36{\pm}0.14D$ more effective than Single Vision. When only the mother had refraction, the mean value between MyoVision and Single Vision lens was $-0.37{\pm}0.06D$, and the mean between MC lens and Single Vision lens was $-0.38{\pm}0.08D$. And when both parents had refraction problems, the mean value change between MyoVision and Single Vision lens was $-0.28{\pm}0.07D$, and $-0.31{\pm}0.07D$, respectively. Conclusion : MyoVision and MC Lens appeared to have no effect on the functions of mitigating myopia in within group comparisons, but MyoVision and MC Lens showed reducing myopia than Single Vision in between group.

Low cost, printed P-OLED displays for entry into the flexible display market

  • MacKenzie, J.Devin;Breeden, J.J.;Carter, S.A.;Chen, J.P.;Hinkle, P.;Jones, E.;Kreger, M.A.;Nakazawa, Y.;Roeloffs, R.;Vo, Vung;Wilkinson, M.
    • 한국정보디스플레이학회:학술대회논문집
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    • pp.641-643
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    • 2006
  • Add-Vision has developed a low-cost print technology for P-OLED displays on flexible substrates that meets several essentials for a new technology including: (1) Functionality including low DC voltage and wide color gamut; (2) Utilization of inexpensive tools; (3) Performance matching entry applications and markets. AVI's process is based on large-area printing of a combination of doped emissive and air-stable cathode inks utilizing truly low-cost tools to create printed P-OLEDs.

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A real-time vision system for SMT automation

  • Hwang, Shin-Hwan;Kim, Dong-Sik;Yun, Il-Dong;Choi, Jin-Woo;Lee, Sang-Uk;Choi, Jong-Soo
    • 제어로봇시스템학회:학술대회논문집
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    • pp.923-928
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    • 1990
  • This paper describes the design and implementation of a real-time, high-precision vision system and its application to SMT(surface mounting technology) automation. The vision system employs a 32 bit MC68030 as a main processor, and consists of image acquisition unit. DSP56001 DSP based vision processor, and several algorithmically dedicated hardware modules. The image acquisition unit provides 512*480*8 bit image for high-precision vision tasks. The DSP vision processor and hardware modules, such as histogram extractor and feature extractor, are designed for a real-time excution of vision algorithms. Especially, the implementation of multi-processing architecture based on DSP vision processors allows us to employ more sophisticated and flexible vision algorithms for real-time operation. The developed vision system is combined with an Adept Robot system to form a complete SMD system. It has been found that the vision guided SMD assembly system is able to provide a satisfactory performance for SND automation.

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Case Study of Vision Therapy in Binocular Dysfunction-Convergence Insufficiency (양안시이상-폭주부족 교정의 임상사례)

  • Park, Hyun-Ju;Seong, Jeong-Sub
    • Journal of Korean Ophthalmic Optics Society
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    • v.12 no.3
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    • pp.131-135
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    • 2007
  • To investigate whether vision therapy (vision training) are an effective way to influence the near point of convergence, fusion range and asthenopic symptoms in convergence insufficiency. For one chosen patient who had convergence insufficiency, vision therapy (vision training) was prescribed for 4 weeks. 4 weeks later vision therapy (vision training) was quite effective in convergence insufficiency. That is, vision therapy (vision training) was an effective means of reducing symptoms, improving fusion range and decompensating exophoria in patient with convergence insufficiency.

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Development of a Ubiquitous Vision System for Location-awareness of Multiple Targets by a Matching Technique for the Identity of a Target;a New Approach

  • Kim, Chi-Ho;You, Bum-Jae;Kim, Hag-Bae
    • 제어로봇시스템학회:학술대회논문집
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    • pp.68-73
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    • 2005
  • Various techniques have been proposed for detection and tracking of targets in order to develop a real-world computer vision system, e.g., visual surveillance systems, intelligent transport systems (ITSs), and so forth. Especially, the idea of distributed vision system is required to realize these techniques in a wide-spread area. In this paper, we develop a ubiquitous vision system for location-awareness of multiple targets. Here, each vision sensor that the system is composed of can perform exact segmentation for a target by color and motion information, and visual tracking for multiple targets in real-time. We construct the ubiquitous vision system as the multiagent system by regarding each vision sensor as the agent (the vision agent). Therefore, we solve matching problem for the identity of a target as handover by protocol-based approach. We propose the identified contract net (ICN) protocol for the approach. The ICN protocol not only is independent of the number of vision agents but also doesn't need calibration between vision agents. Therefore, the ICN protocol raises speed, scalability, and modularity of the system. We adapt the ICN protocol in our ubiquitous vision system that we construct in order to make an experiment. Our ubiquitous vision system shows us reliable results and the ICN protocol is successfully operated through several experiments.

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Design Vision Box base on Embedded Platform (Embedded Platform을 기반으로 하는 Vision Box 설계)

  • Kim, Pan-Kyu;Hoang, Tae-Moon;Park, Sang-Su;Lee, Jong-Hyeok
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • v.9 no.2
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    • pp.1103-1106
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    • 2005
  • The purpose of this research is design of Vision Box which can capture an image which inputs through the camera and understand movement of object included in captured image. In design, we tried to satisfy user's requirements. We made Vision Box can analyze movement of object in image captured by camera without additional instruments. In addition, it is possible that communicate with PLC and operate Vision Box by remote control. We could verify the Vision Box capability by using it to automobile engine pattern analysis. We expect the Vision Box will be used various industrial fields.

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A study on the Vision-related Knowledge and Behaviors of the 1st and 2nd graders of Primary School and their Parents in a City (일 초등학교 1·2학년 아동과 학부모의 시력관련 지식 및 행태에 관한 조사)

  • Kim, Seol-Yi;Kang, Hae-Young
    • Journal of the Korean Society of School Health
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    • v.15 no.1
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    • pp.141-150
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    • 2002
  • The purpose of this study was to investigate the visual acuity and the degree of vision-related knowledge and behaviors of the 1st and 2nd graders of primary school and their parents in a city. The research design was a descriptive study and the subjects were 579 pupils and their parents in Namwon City, Chonbuk province. Children's vision screening was conducted with Han's test by author, school nurse according to the guidelines. The data were analyzed by frequency, percentage, mean, S.D., t-test, ANOVA, Pearson's correlation coefficient, $x^2$-test with SAS program. Subnormal visual acuity group (SVAG) in children was 17.3%, and was higher in girls and in the 2nd graders, but there were no significant differences statistically. The mean score of the vision-related knowledge in children was 6.8 points out of 10 points and that of vision-related behaviors was 23.5 points out of 33 points. The mean scores of the vision-related knowledge were significantly higher in 2nd graders (p= .02), in girls (p= .02) and SVAG (p= .01) and the group of high scores in vision-related knowledge presented significantly high scores in vision-related behaviors (p= .001). The mean score of the vision-related knowledge in parents was 6.4 points out of 10 points and that of vision-related behaviors was 28.4 points out of 33 points. The group with high scores of vision-related knowledge in parents presented significantly high scores in vision-related behaviors (p= .003). As SVAG were higher in 2nd graders and the group of high scores of vision-related knowledge showed also high scores in vision-related behaviors in both children and their parents, From the above results, the author suggests a school-based visual health program for them.

Robot vision interface (로보트와 Vision System Interface)

  • 김선일;여인택;박찬웅
    • 제어로봇시스템학회:학술대회논문집
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    • pp.101-104
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    • 1987
  • This paper shows the robot-vision system which consists of robot, vision system, single board computer and IBM-PC. IBM-PC based system has a great flexibility in expansion for a vision system interfacing. Easy human interfacing and great calculation ability are the benefits of this system. It was carried to interface between each component. The calibration between two coordinate systems is studied. The robot language for robot-vision system was written in "C" language. User also can write job program in "C" language in which the robot and vision related functions reside in the library.side in the library.

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Design and Application of Vision Box Based on Embedded System (Embedded System 기반 Vision Box 설계와 적용)

  • Lee, Jong-Hyeok
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.13 no.8
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    • pp.1601-1607
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    • 2009
  • Vision system is an object recognition system analyzing image information captured through camera. Vision system can be applied to various fields, and automobile types recognition is one of them. There have been many research about algorithm of automobile types recognition. But have complex calculation processing. so they need long processing time. In this paper, we designed vision box based on embedded system. and suggested automobile types recognition system using the vision box. As a result of pretesting, this system achieves 100% rate of recognition at the optimal condition. But when condition is changed by lighting and angle, recognition is available but pattern score is lowered. Also, it is observed that the proposed system satisfy the criteria of processing time and recognition rate in industrial field.

A Ubiquitous Vision System based on the Identified Contract Net Protocol (Identified Contract Net 프로토콜 기반의 유비쿼터스 시각시스템)

  • Kim, Chi-Ho;You, Bum-Jae;Kim, Hagbae
    • The Transactions of the Korean Institute of Electrical Engineers D
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    • v.54 no.10
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    • pp.620-629
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    • 2005
  • In this paper, a new protocol-based approach was proposed for development of a ubiquitous vision system. It is possible to apply the approach by regarding the ubiquitous vision system as a multiagent system. Thus, each vision sensor can be regarded as an agent (vision agent). Each vision agent independently performs exact segmentation for a target by color and motion information, visual tracking for multiple targets in real-time, and location estimation by a simple perspective transform. Matching problem for the identity of a target during handover between vision agents is solved by the Identified Contract Net (ICN) protocol implemented for the protocol-based approach. The protocol-based approach by the ICN protocol is independent of the number of vision agents and moreover the approach doesn't need calibration and overlapped region between vision agents. Therefore, the ICN protocol raises speed, scalability, and modularity of the system. The protocol-based approach was successfully applied for our ubiquitous vision system and operated well through several experiments.