• 한국정밀공학회:학술대회논문집
• /
• 한국정밀공학회 2005년도 추계학술대회 논문집
• /
• pp.966-970
• /
• 2005

A Robot Performance Evaluation System(RPES) Program with auto extraction algorism was developed according to the ISO 9283 robot performance criteria. The developed program looks for order point automatically in data that get laser measurement Instrument and estimate performance of robot using this order point. In addition, this program estimates Each Joint Motion of robot. Robot Performance Evaluation System(RPES) Software was developed with Visual Basic satisfying the need of Hyundai Motor Company. The developed system was implemented on NACHI 8608 AM 11 robot. The resulted output shows the effectiveness of the developed system.

• Smart Structures and Systems
• /
• 제30권3호
• /
• pp.287-301
• /
• 2022

The machine-vision based structural displacement measurement methods are widely used due to its flexible deployment and non-contact measurement characteristics. The accuracy of vision measurement is directly related to the image resolution. In the field of computer vision, super-resolution reconstruction is an emerging method to improve image resolution. Particularly, the deep-learning based image super-resolution methods have shown great potential for improving image resolution and thus the machine-vision based measurement. In this article, we firstly review the latest progress of several deep learning based super-resolution models, together with the public benchmark datasets and the performance evaluation index. Secondly, we construct a binocular visual measurement platform to measure the distances of the adjacent corners on a chessboard that is universally used as a target when measuring the structure displacement via machine-vision based approaches. And then, several typical deep learning based super resolution algorithms are employed to improve the visual measurement performance. Experimental results show that super-resolution reconstruction technology can improve the accuracy of distance measurement of adjacent corners. According to the experimental results, one can find that the measurement accuracy improvement of the super resolution algorithms is not consistent with the existing quantitative performance evaluation index. Lastly, the current challenges and future trends of super resolution algorithms for visual measurement applications are pointed out.

• 대한감각통합치료학회지
• /
• 제21권3호
• /
• pp.39-53
• /
• 2023

목적 : 본 연구는 발달장애아동에게 아이트래커를 병행한 감각통합치료가 감각처리 및 시지각에 미치는 효과를 알아보고자 하였다. 연구방법 : 본 연구의 설계는 단일대상연구의 대상자간 중다기초선 설계이며, 중재는 아이트래커를 병행한 감각통합치료를 적용하였다. 기초선 기간과 중재 기간의 매 회기 평가로 시각-운동 속도와 단속적 눈의 움직임을 평가하였으며, 사전·사후 평가로 감각프로파일, 한국판시지각발달검사, 선잇기검사를 실시하였다. 매 회기 평가와 사전·사후 평가는 시각적 분석 및 경향선 분석을 통해 중재의 효과를 연구하였다. 결과 : 회기별 평가 결과, 시각-운동속도와 단속적 눈의 움직임에서 모든 아동의 경향선 기울기가 기초선기간보다 중재기간에 급격하게 증가하였다. 사전·사후 평가결과, 감각처리에서는 움직임, 몸위치, 시각의 감각처리가 또래보다 많음에서 또래와 유사 수준으로 변화하였으며, 시지각에서는 모든 아동의 시각통합능력이 증가하였다. 또한, 아동의 시각추적 및 시각-운동 능력의 향상을 확인하기 위해 실시한 선잇기검사 결과, 모든 아동이 사전보다 사후에 수행시간이 감소하였다. 결론 : 발달장애아동의 아이트래커를 병행한 감각통합치료는 감각처리 및 시지각에 긍정적인 영향을 미쳤으며, 최근 기술의 향상과 스마트기기의 보급과 맞추어 아동의 흥미와 동기를 부여할 수 있어 임상적으로 중요한 역할을 할 것으로 사료된다.

• 한국멀티미디어학회논문지
• /
• 제7권12호
• /
• pp.1671-1679
• /
• 2004

This study has proposed visual-feature extraction methods for each band in wavelet domain with both spatial frequency features and multi resolution features. In addition, it has brought forward similarity measurement method using fuzzy theory and new color feature expression method taking advantage of the frequency of the same color after color quantization for reducing quantization error, a disadvantage of the existing color histogram intersection method. Experiments are performed on a database containing 1,000 color images. The proposed method gives better performance than the conventional method in both objective and subjective performance evaluation.

• 한국경영과학회지
• /
• 제32권2호
• /
• pp.17-40
• /
• 2007

Most research on web site design has focused on technological factors, while visual aesthetic factors have been considered less important. In contrast, this study focuses on visual aesthetic factors in web site design. Findings of this study can be summarized as follows : (1) The result of SPSS-factor analysis shows that there are 3 distinct factors, 'classical aesthetics', 'expressive aesthetics', and 'usability' 'Classical aesthetics' and 'expressive aesthetics' can be described by visual aesthetic design, 'Visual aesthetic design' can be distinguished from 'usability'. This conceptual confusion relating to 'usability' and 'visual aesthetic design' can be clarified by these findings. (2) As a result of multiple regression analyses, 'classical aesthetics', 'expressive aesthetics', and 'usability' have a positive influence on 'interactivity' and 'web site evaluation'. This research clarifies the concepts of 'expectations' of Grier [18] and 'engagement' of Rosen and Purinton [33] as the 'interactivity' between users and web sites. Furthermore, this research suggests a valid model with high $R^2$(interactivity, 48% : web site evaluation, 68%). (3) Empirical tests show that the differences among users in 'entry point' are related to the characteristics of web sites and the personal characteristics of users. The differences among users in terms of 'scanning time' are closely related to the attitudes and evaluation tendencies of users with respect to web sites. These findings could contribute to the 'search phase' of the Faraday model [16], enabling it to be more precise and extensible. The managerial implication of this study is that customers' preferences regarding web site designs are differences, as their preferences are based on their individual characteristics. Therefore, marketing managers should consider promotional tools on web sites that are relevant to the target market. An optimal strategy for web design could be a carefully-selected combination of factors that are relevant to the 'interactivity' and 'evaluation' of web sites. Additionally, if marketing managers want to attract more favorable attitudes and more affirmative evaluations from users, web sites should be designed so that they are understood more quickly by users. finally, this study suggests that 'good design' for web sites depends on understanding how to attain the appropriate balance between 'classical aesthetics' and 'expressive aesthetics', based on the target customer.

• 한국도로학회논문집
• /
• 제18권6호
• /
• pp.115-122
• /
• 2016

OBJECTIVES : This study develops an evaluation method, which is useful to inspect pavement condition of specific boroughs. This is because pavement condition is broadly divided into five grades via visual inspection, which does not consider the types of deteriorations, and is decided by an investigator having a subjective viewpoint. This visual inspection method is not a satisfactory method for accurate maintenance when various deteriorations occur. METHODS : The performance model considers several factors such as crack, rutting, and IRI. This method is also modified from borough SPI based on SPI (Seoul Pavement Index). Considering limited budget of borough, PI (prediction index) is suggested, which is related to the grade of pavement condition evaluation and type of materials. Practical correlation review is also conducted with statistical verification by using the Monte Carlo simulation. RESULTS : The results of the study show that modified criteria are reasonable. First, the comparison between the visual inspection result and the SPI result indicates that the R-square value is sufficiently high. Second, through the common section, each evaluation method could be compared, and the result shows considerable similarity, which increases when the range is modified. Finally, PI for predicting remaining life and the random number SPI have common parts, which means that each indicator would be adequate to be used as an evaluation method. CONCLUSIONS : Comparison and analysis results show that the developed evaluation method is reasonable for specific boroughs where financial support is inadequate for the evaluation process by using the newer equipment. Moreover, for more accurate evaluation method, previous visual inspection data should be utilized, and the database of inspection equipment have to be collected.

• 대한인간공학회지
• /
• 제19권3호
• /
• pp.13-21
• /
• 2000

Men perceive and react around him through the five senses. Also men give rise to the human sensibility and maintain his emotion. This study doesn't limit working environment to VDT environment, but considers the universal working environment acquiring information by eyesight stimulation. In case of forming an abnormal veiling reflection we consider the form ; a vertical(25%, 50%, 75%)and a horizontal(25%, 50%, 75%). The results from the subjective evaluation are analyzed by SD(Semantic Differentical methodology)of 5 point scale for visibility and nuisance when an abnormal veiling reflection forms on target. In addition, the results of the objective evaluation are suggested by measuring and analyzing EEG of bio-signal for visual sensitivity. The results of this study can apply to basic data which create a guideline of a visual operation. In particular, it can be designed as an illumination environment concerning an ergonomic factor on visual operations, mental stress such as a visual inspection operation, visual information search operation, etc. As a result, we can expect to reduce the visual nuisance and contribute to the improvement of the performance and the uplift of the competitive power.

• 감성과학
• /
• 제4권2호
• /
• pp.63-68
• /
• 2001

조명 색온도에 따른 작업자의 피로도를 평가하기 위하여 세 종류의 조명 색온도(2700 K, 4000 K, 6500 K)를 실험변수로 하여 모니터상에서 오류수정 작업이 수행되었다. 색온도의 변화에 따른 인체의 영향을 평가하기 위하여 먼저 주관평가와 작업수행도의 상관관계를 분석하였다. 시각피로·정신피로와 집중도에 관한 주관평가를 실시한 결과, 2700 K에서 시각피로 및 정신피로가 가장 적고 집중도가 높으며 작업수행도가 가장 좋았다. 6500 K에서 정신피로를 가장 많이 느끼고 집중도가 제일 낮았으나, 시각피로를 가장 많이 느낀 4000 K에서의 작업수행도가 가장 낮았다. 결과적으로 세 가지 색온도 조건 중 2700 K가 모니터상의 오류수정 작업에 가장 적합하다고 할 수 있다.

• 한국가시화정보학회지
• /
• 제11권2호
• /
• pp.18-26
• /
• 2013

An accurate and reliable performance evaluation technique is indispensable for the development of marine antifouling coatings. The existing standard practice is however, based on the visual observation of biofouling settlement area, which is prone to the subjective judgment of the inspector. In spite of the above mentioned importance, a systematic and objective fouling evaluation technique has not yet been introduced. In this study, a novel quantitative antifouling performance evaluation method for marine antifouling paints is devised based on the image analysis of panel immersion test results. The present image analysis method is to quantify settlement area for each fouling category by distinctive color. The fouling categories are set as unfouled, biofilm, green algae, brown algae, calcareous animal and spongy animal with specific HSL (Hue, Saturation, Lightness) color ranges. In order to assess the effectiveness of the proposed method, static immersion tests for three antifouling coatings were undertaken for two years.

• 대한물리의학회지
• /
• 제10권4호
• /
• pp.59-68
• /
• 2015

PURPOSE: The purpose of this study was to determine the comparison of visual and auditory biofeedback during sit-to-stand training in patients with stroke. METHODS: Thirty-five subjects with chronic stroke were divided into three groups: a visual feedback group (12 subjects), an auditory feedback group (12 subjects) and a control group (11 subjects). All Groups received neurodevelopmental treatment, and sit-to-stand training for 30minutes three times a week for four weeks. During the sit to stand training, the experimental groups received visual feedback and auditory feedback, whereas the control group performed sit-to-stand training without feedback. Five times sit-to-stand test (FTSST), motion analysis and postural sway during sit-to-stand were used to evaluate sit to stand performance ability. In addition, Berg balance scale (BBS) was performed for evaluation of balance function in participants. RESULTS: All groups showed significant increase on FTSST and BBS between pre- and post-intervention. The BBS scores in visual feedback group was significant increase than control group. The motion analysis and postural sway, more improvement was observed in the visual and auditory feedback groups compared with the control group. The only visual feedback group was a better performance of midline excursion during sit-to-stand than control group. CONCLUSION: These findings suggest that sit-to-stand training using a biofeedback may help to improve sit to stand performance and balance ability of stroke patients.