• 제목/요약/키워드: Visual value

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적응적 이진화를 이용하여 빛의 변화에 강인한 영상거리계를 통한 위치 추정 (Robust Visual Odometry System for Illumination Variations Using Adaptive Thresholding)

  • 황요섭;유호윤;이장명
    • 제어로봇시스템학회논문지
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    • 제22권9호
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    • pp.738-744
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    • 2016
  • In this paper, a robust visual odometry system has been proposed and implemented in an environment with dynamic illumination. Visual odometry is based on stereo images to estimate the distance to an object. It is very difficult to realize a highly accurate and stable estimation because image quality is highly dependent on the illumination, which is a major disadvantage of visual odometry. Therefore, in order to solve the problem of low performance during the feature detection phase that is caused by illumination variations, it is suggested to determine an optimal threshold value in the image binarization and to use an adaptive threshold value for feature detection. A feature point direction and a magnitude of the motion vector that is not uniform are utilized as the features. The performance of feature detection has been improved by the RANSAC algorithm. As a result, the position of a mobile robot has been estimated using the feature points. The experimental results demonstrated that the proposed approach has superior performance against illumination variations.

비주얼파닉스를 활용한 조음중재가 청각장애아동의 말 명료도와 모음공간에 미치는 영향 (The effect of articulation therapy using visual phonics to improve the speech intelligibility and vowel space of children with impaired hearing)

  • 심희정;이효주;서창원
    • 말소리와 음성과학
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    • 제10권2호
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    • pp.85-96
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    • 2018
  • The purpose of this study was to investigate the effect of articulatory intervention using visual phonics to improve the speech intelligibility of children with impaired hearing. The subjects of the study were five hearing impaired children. As per the results of the UTAP articulation tests, five phonemes with the most frequent errors were selected for each child and a total of 10 sessions were provided. The methodology involved analyzing vowel space and related measures (vowel space area, vowel articulatory index, formant centralization ratio, and F2i/F2u ratio) before and after the visual phonics intervention. After the articulation intervention, every child's speech intelligibility improved, their vowel space area was widened, the FCR value decreased, and the F2ratio value increased. These results show that the use of visual phonics through symbolic images and hand clues has a positive effect in terms of improving the speech intelligibility of children with impaired hearing.

실내조경에 있어서 식물의 시각량이 시각선호에 미치는 영향 (The Influence of the Ratio of Greenery on the Visual Preference in interior Landscape)

  • 이남현;방광자
    • 한국조경학회지
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    • 제24권2호
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    • pp.13-24
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    • 1996
  • The purpose of this study is to suggest optimum level of the Ratio of Greenery within the frame of vision in the interior landscape design through the analysis of visual character and preference of the interior landscape. The concept of the RG was defined as the ratio of projected area of plants higher than 1.2M against background wall from eye level. 5 photography of Interior landscape space -- 10,20,30,40 and 50% of the RG-- were constructed by computer graphic techinques. Likert scale and semantic differential scale were used to analyse visual character and preference of the interior landscape space. The analysis results are as follows : 1. Factors that compose of the image of the interior landscape have been found to be the "evaluation ", "complexity". The mean value of semantic differential scale showed a significant difference according to RG. When the RG was 20~30%, "Harmony" and "stability" was strongly recognized than the other factors and the interior landscape made the interior space natural and intimate. But at the RG 40!50%, users felt "stuffy" and "too complex" by many plants, so it was not efficient the Interior Landscape. 2. The visual preference was significantly different according to RG. The mean value of the visual preference was increased as the RG was higher, it was the highest at the RG 30%. But over the RG 30%, the preference level was declined. 3. Based on these results, this study suggests that the optimum level of RG in the Interior Landscape is 30%.at the optimum level of RG in the Interior Landscape is 30%.

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현대 실내디자인에 표현된 디지털미디어의 비주얼 인터페이스 경향에 관한 연구 (Visual Interface Trend of Digital Media Expressed on Contemporary Interior Design)

  • 은이선;정미렴
    • 한국실내디자인학회논문집
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    • 제15권5호
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    • pp.104-111
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    • 2006
  • Digital media changed not only our lifestyle and sense of value but also art and space design, and development of technology will accelerate the alteration. It provided limitless possibility and inspiration to art, architecture and design. In this 'image' era, media communicate with us mostly in visual method, which gets to he realized by visual interface. The purpose of this study is to analyze the tendency of visual interface of contemporary interior design cases in the standpoint of digital media characteristics and suggest directions for future space design. The characteristics of digital media and interface are defined, and how the concept unfolded in art, design is also discussed. In interior design, the concepts come out as various types of visual interface, showing the characteristics of composition of material and immaterial, interaction between visual information and space users and among users, realization of cyberspace and simultaneous coexistence of multiple space-time multi-layer.

온라인 패션 쇼핑몰에서 쇼핑몰 속성과 쇼핑가치가 구매의도에 미치는 영향 (Effects of Shopping Mall Attributes and Shopping Values on Online Purchase Intentions)

  • 박은주;강은미
    • 한국의류학회지
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    • 제29권11호
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    • pp.1475-1484
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    • 2005
  • The purposes of this study were 1) to examine the dimension of fashion shopping mall attributes and shopping value related to online shopping, and 2) to investigate the effects of fashion shopping mall attributes and shopping value on purchase intention in online shopping. Data were obtained from 423 online fashion shopping mall consumers who have experiences of buying products or visiting to online fashion shopping mall in Busan, and were analyzed using by factor analysis, Cronbach's alpha, path analysis of LISREL 8.53. The results showed online fashion shopping mall attributes were composed of Visual information, Loading speed Space composition, Product assortment, Checkout service, and Help desk. Shopping value perceived by online fashion shopping mall consumers were consisted two factors: Hedonic value and Utility value. Hedonic value and Utility value Perceive by online consumers were influenced by Product assortment, Visual information, Help desk, and Space composition of shopping mall. Additionally, hedonic and utility shopping values perceive by online consumers impacted online purchase intention. Findings suggest that fashion shopping mall attributes mediated by shopping values are important in predicting purchase intention of online shopping mall. Implications are drawn for the information useful to consumer behavior researchers and retailers of online fashion shopping mall.

A study on the corrosion evaluation and lifetime prediction of fire extinguishing pipeline in residential buildings

  • Jeong, Jin-A;Jin, Chung-Kuk;Lee, Jin Uk
    • Journal of Advanced Marine Engineering and Technology
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    • 제39권8호
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    • pp.828-832
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    • 2015
  • This study is conducted for the evaluation of corrosion and lifetime prediction of fire extinguishing pipelines in residential buildings. The fire extinguishing pipeline is made of carbon steel. Twenty-four samples were selected among all the fire extinguishing pipelines in a building; the selection was based on specimenspositions, pipeline diameters, and pipeline thickness. Analysis was conducted by using the results of visual inspection, electrochemical potentiodynamic anodic polarization test, pitting depth measurements, and extreme value statistics with the Gumbel distribution. The maximum pitting depth and remaining life were statistically predicted using extreme value statistics. During visual inspection, pitting corrosion was observed in several samples. In addition, extreme value statistics demonstrated that there were several pipelines that were very sensitive to pitting corrosion. However, the pitting corrosion was not critical in all the pipelines; thus, it was necessary to change only those pipelines that were severely corroded.

Use of real-time ultrasound imaging for biofeedback of diaphragm motion during normal breathing in healthy subjects

  • Cho, Ji-Eun;Hwang, Dal-Yeon;Hahn, Joohee;Lee, Wan-Hee
    • Physical Therapy Rehabilitation Science
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    • 제7권3호
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    • pp.95-101
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    • 2018
  • Objective: To determine if the provision of visual biofeedback using real-time rehabilitative ultrasound imaging (RUSI) enhances the acquisition and retention of diaphragm muscle recruitment during exercise. Design: Two group pretest posttest design. Methods: Thirty healthy subjects were randomly assigned to the verbal feedback group (VG, n=15) or the visual and verbal feedback group (VVG, n=15). The VG performed breathing exercises 10 times with verbal feedback, and the VVG also performed breathing exercises 10 times with verbal feedback and visual feedback with the use of RUSI to measure changes in diaphragm thickness (DT). For DT, the mid-axillary lines between ribs 8 and 9 on both sides were measured in standing, and then the chest wall was perpendicularly illuminated using a linear transducer with the patients in supine to observe the region between rib 8 and 9 and to obtain 2-dimensional images. DT was measured as the distance between the two parallel lines that appeared bright in the middle of the pleura and the peritoneum. After one week, three repetitions (follow-up session) were performed to confirm retention effects. Intra- and between- group percent changes in diaphragm muscle thickness were assessed. Results: In the VVG, the intervention value had a medium effect size compared to the baseline value, but the follow-up value decreased to a small effect size. In the between-group comparisons, during the intervention session, the VVG showed no significant effect on percent change of DT but had a medium effect size compared to the VG (p=0.050, Cohen's d=0.764). During the follow-up session, retention effect did not persist (p=0.311, Cohen's d=0.381). Conclusions: RUSI can be used to provide visual biofeedback and improve performance and retention in the ability to activate the diaphragm muscle in healthy subjects. Future research needs to establish a protocol for respiratory intervention to maintain the effect of diaphragmatic breathing training using RUSI with visual feedback.

크리핑 벤트그래스 품종의 생육 특성 (Growth Characteristics of Creeping bentgrass Cultivars)

  • 이혜원;정대영;심상렬
    • 아시안잔디학회지
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    • 제17권2_3호
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    • pp.87-97
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    • 2003
  • The growth characteristics of creeping bentgrass seeded in the seaside landfill golf course are as follows. 1. As a result of analysis on the chemical characteristics of soil mixture used for turfgrass ground in this experiment, soil pH was 7.9, which is somewhat higher than the creeping bentgrass reference value of pH 5.5∼6.5; T-N(%) was 0.02, which is proper for the reference value, and trace element too lacked. 2. The cultivar with the fastest water infiltration was Seaside II recorded as 226.2cm/sec, while that with the slowest water infiltration was Pennlinks recorded as 141.1 cm/hr which was too faster than the USGA water infiltration reference value of 15∼30cm/hr. For the surface hardness of turfgrass ground with different cultivars, no statistically significant variation was found between the Penncross grass and the Pennlinks recorded as 18.6mm and 19.1 mm, respectively. The soil penetration was the highest in Pennlinks recorded as 7.6kg/$\textrm{cm}^2$ and lowest in Penn A-1 as 6.1kg/$\textrm{cm}^2$. 3. As a result of evaluation on visual quality at the early stage of growth, Penncross showed the most excellent visual quality compared to the others. However, Penn A-1 showed the most excellent visual quality at a late stage of growth around Sep. 17, 2003, and it was also excellent in the evaluation of visual color. Seaside II showed higher density around the root and the longest root length and was highly resistant to salt compared to others, but the initial sprouting rate was not satisfied, and the visual quality in the summer season was inferior to others. 4. As a result of measurement of the traffic injury, Penncross showed the most tolerant to the traffic stress and Pennlinks showed the most susceptible.

비주얼 머천다이징 효과에 관한 연구: 한국과 중국 소비자의 비교문화연구 (A Study of Visual Merchandising Effectiveness: A Cross-cultural Study of Korean and Chinese Consumers)

  • 박현희;이금;전중옥
    • 한국의류산업학회지
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    • 제12권4호
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    • pp.439-449
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    • 2010
  • The purpose of this study is to identify the differences in persuasive effectiveness of visual merchandising between consumers in Korea and China including the moderating roles of shopping value in effectiveness of visual merchandising. For the cross-cultural experiment, 2(degree of sensuousness of VM: high vs. low)${\times}$2(involvement: high vs. low)${\times}$2(nation: Korea vs. China) factorial design were used. A total of 480 questionnaires allocating 60 students to each group were distributed. The results were as follows. First, Chinese consumers were likely to respond favorably regardless of the degree of sensuousness of VM, while Korean consumers were more positive in high degree of sensuousness of VM. Second, aesthetic cognition of VM and attitude toward VM had positive influences on brand cognition in both countries. Third, Korean consumers with greater recognition of aesthetic attributes of VM had more positive brand attitude, while Chinese consumers with greater recognition of utilitarian attributes of VM had more positive brand attitude. Fourth, there were moderating effects of shopping value in persuasive effectiveness of VM in Chinese consumer group, while there were no significant moderating effects in Korean consumer group. With the cross-cultural interpretation of the fin-dings, strategic implications and suggestions for the global fashion retailing, specifically fashion visual merchandising, are provided.

Characteristic of back fat and quality of longissimus dorsi muscle from soft fat pork carcasses

  • Lim, Daewoon;Song, Minho;Lee, Juri;Lee, Chulwoo;Lee, Jaechung;Lee, Wangyeol;Seo, Jihee;Jung, Samooel
    • 농업과학연구
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    • 제43권4호
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    • pp.581-588
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    • 2016
  • The objective of this study was to investigate the accuracy of visual discrimination of soft fat pork carcasses when subjecting carcasses to quality grade evaluations. In addition, the quality of the longissimus dorsi muscle from soft fat carcasses was investigated. Iodine values of back fat from soft fat carcasses evaluated by visual discrimination were significantly higher than those from firm fat carcass (p < 0.05). However, those values were lower than the standard for soft fat (iodine value = 70). There were no significant differences in linoleic acid content, b-values, and L-values (p < 0.05) of back fat between firm and soft fat carcasses evaluated by visual discrimination. Color of longissimus dorsi muscle from soft fat carcasses (iodine value higher than 70) was not different from that of firm fat carcass (iodine value lower than 70). Except for linoleic acid, there were no significant differences in any fatty acid contents between longissimus dorsi muscles from firm fat and soft fat carcasses. Monounsaturated fatty acid content of longissimus dorsi muscles from soft fat carcasses was significantly lower than those of firm fat carcass (p < 0.05). However polyunsaturated fatty acid content was significantly higher (p < 0.05) in longissimus dorsi muscles from soft fat carcasses. In conclusion, visual discrimination results for soft fat pork carcass were inaccurate. Therefore, other indicators should be required to evaluate soft fat pork carcasses. In contrast, the quality of longissimus dorsi muscle from soft fat carcasses was superior in terms of fatty acid composition compared with that of firm fat carcasses.