• Title/Summary/Keyword: inconsistency

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Precise Geometric Registration of Aerial Imagery and LIDAR Data

  • Choi, Kyoung-Ah;Hong, Ju-Seok;Lee, Im-Pyeong
    • ETRI Journal
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    • v.33 no.4
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    • pp.506-516
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    • 2011
  • In this paper, we develop a registration method to eliminate the geometric inconsistency between the stereo-images and light detection and ranging (LIDAR) data obtained by an airborne multisensor system. This method consists of three steps: registration primitive extraction, correspondence establishment, and exterior orientation parameter (EOP) adjustment. As the primitives, we employ object points and linked edges from the stereo-images and planar patches and intersection edges from the LIDAR data. After extracting these primitives, we establish the correspondence between them, being classified into vertical and horizontal groups. These corresponding pairs are simultaneously incorporated as stochastic constraints into aerial triangulation based on the bundle block adjustment. Finally, the EOPs of the images are adjusted to minimize the inconsistency. The results from the application of our method to real data demonstrate that the inconsistency between both data sets is significantly reduced from the range of 0.5 m to 2 m to less than 0.05 m. Hence, the results show that the proposed method is useful for the data fusion of aerial images and LIDAR data.

Inconsistency of Online Self-presentation across SNS Platforms and Its Impact on Impression Formation

  • Vyshemirskaya, Olga;Na, Eunkyung
    • International Journal of Internet, Broadcasting and Communication
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    • v.13 no.2
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    • pp.127-135
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    • 2021
  • The goal of this study was to explore the use of multiple SNS platforms and determine whether the number of used platforms affects one's online self-presentations across the said platforms and if there is any difference in one's online and offline self-presentations based on how many SNS platforms are used. This work studied online self-presentations, compared the on/offline ones and tried to find out if the inconsistencies of one's own (observer's) self-presentations both online (across platforms) and on/offline affected the observer's impression formation (likability, trustworthiness and hypocrisy) of others. The study also aimed to find out if the impression of the others' inconsistency both online and offline would differ based on the level of intimacy between the observer and the discussant. Three levels of intimacy were studied in order to do this: friends, acquaintances and strangers (online-only friends). The results showed that the more platforms people used the more inconsistent their online self-presentations got. Even though the results of the study showed barely significant relationship between the number of SNS accounts and one's online and offline self-presentation, and partial connection between observer's inconsistent self-presentations and impression formation of others, interestingly enough, the results managed to find significant differences between the impressions based on the level of intimacy between the observer and the discussants.

Effect of Inconsistency Between Visually Perceived Walking Speed and Physically Perceived Walking Speed on VR Sickness in VR-Treadmill Walking (가상현실-트레드밀 보행에서 시각적 속도감과 보행 속도감의 불일치가 가상현실 멀미에 미치는 영향)

  • Choi, InBeom;Park, Jong-Jin;Kim, ShinWoo;Li, Hyung-Chul O.
    • Science of Emotion and Sensibility
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    • v.23 no.3
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    • pp.79-90
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    • 2020
  • The inconsistency in different sensory information causes virtual reality (VR) sickness. This research verifies whether the consistent sensory information reduces VR sickness within treadmill-based virtual reality. Furthermore, we examined the inconsistency between the visually perceived walking speed by optical flow in VR and the physically perceived walking speed in treadmill walking on VR sickness. In Experiment 1, participants reported VR sickness levels while experiencing an increase in the virtual reality. We compared the VR sickness level reported on the standing still condition with that on the treadmill-walking condition. Based on our results, less VR sickness and more sense of presence and immersion were reported on the treadmill-walking condition than on the standing still condition. In Experiment 2 and Experiment 3, the effect of inconsistency between perceived visual speed and perceived walking speed on VR sickness was examined. Interestingly, participants reported less sickness when the perceived visual speed was faster than the perceived walking speed, compared to when the sense of speed was consistent. These results imply that allowing participants to walk on a treadmill while experiencing virtual reality reduces VR sickness. Hence, the perceived visual-walking speed consistency is not necessarily required to reduce VR sickness.

Comparison of Sound Pressure for Detecting Incorrect Sonar Measurements (잘못된 초음파 센서 데이터를 여과하기 위한 음압 비교법)

  • Lee, Kyoung-Min;Chung, Wan-Kyun
    • Journal of Institute of Control, Robotics and Systems
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    • v.15 no.3
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    • pp.273-279
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    • 2009
  • In this paper, we address the problem of detecting incorrect sonar measurements. We use ideas from the inconsistency of information among sonar measurements together with the sound pressure of the wave from the sonar sensor to develop a new method, called the comparison of the sound pressure (CSP), to detect incorrect sonar readings. The inconsistency of information in cells can be a clue that indicates candidates for incorrect measurements, and the sound pressure of the wave from the sonar sensor determines incorrect readings among the candidates. From various experiments, the proposed method is confirmed that it is better than existing method at deciding the state of sonar measurements.

A data modelling for the inconsistency resolving on zoning data (용도지역. 지구 자료간 불부합 해결을 위한 데이터모델링에 관한 연구)

  • 최병남;김대종;이권한
    • Spatial Information Research
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    • v.8 no.1
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    • pp.1-14
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    • 2000
  • Zoning data such as national land use planning map, urban land use planning map, agricultural promotion zoning ap, forest land zoning map has a relationship each other in law and spatial context. But difficulties in data share and the lack of accuracy of manual work makes serious inconsistence son zoning data relationship. This causes many trial and error in land use. For resolving this problem the data modellingmethod is presented as a technical solution.

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Bias Reduction in Election Poll Analysis -Measurement Bias of Responses- (선거예측에서 편의의 감소 -거짓응답을 중심으로-)

  • 박용치
    • Proceedings of the Korean Association for Survey Research Conference
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    • 2000.11a
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    • pp.21-39
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    • 2000
  • Researchers in sample surveys have long recognized that what people say they are going to and what they do are not always the same, to say the least. Naturally this inconsistency distorts the survey results, especially in election poll surveys in Korea. How can one cope with this measurement bias\ulcorner This paper suggests two ideas: election poll tree and using posterior probability. By using two ideas the inconsistency of the poll survey results could be improved much or less.

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Young Children's Behavioral Problems and Attention Ability by Parenting Attitude (부모의 양육태도에 따른 유아의 문제행동과 주의집중력)

  • Lee, Soeun
    • Korean Journal of Child Studies
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    • v.28 no.2
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    • pp.71-89
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    • 2007
  • The subjects in this study of parenting attitudes, children's behavior problems and attention ability were 111 5-year-old children and their parents. Data was analyzed by mean, frequency, percent, three-way ANOVA, and Pearson's correlation. Results showed that behavior problems and attention ability of children varied by the parenting attitude of mothers and fathers. Behavior problems of boys were higher than girls, and boys' attention abilities were lower than girls.' Interaction effects were found between parenting attitudes and gender in children's behavior problems and attention ability : fathers' autonomy correlated negatively with boys' behavior problems (r=-.47), task processing speed (r=-.37), and attention inconsistency (r=-.36). Children's behavioral problems correlated positively with attention inconsistency (r=.28).

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Bias Reduction in Election Poll Analysis: Measurement Bias of Responses (선거예측에서 편의의 감소: 거짓응답을 중심으로)

  • 박용치
    • Proceedings of the Korean Association for Survey Research Conference
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    • 2000.06a
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    • pp.35-57
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    • 2000
  • Researchers in sample surveys have long recognized that what people say they are going to and what they do are not always the same, to say the least. Naturally this inconsistency distorts the survey results, especially in election poll surveys in Korea. How can one cope with this measurement bias\ulcorner This paper suggests two ideas: election poll tree and using posterior probability. By using two ideas the inconsistency of the poll survey results could be improved much or less.

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Contour based Algorithms for Generating 3D Models from CT Images (CT 이미지로부터 3차원 모델 생성을 위한 contour 기반 알고리즘)

  • 류재헌;김현수;이관행
    • Journal of the Korean Society for Precision Engineering
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    • v.20 no.4
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    • pp.174-182
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    • 2003
  • Recently, medical imaging has taken interest on CAD based solution for anatomical part fabrication or finite element analysis of human body. In principle, contours representing object boundary are obtained through image processing techniques. Surface models are then approximated by a skinning method. For this, various methods should be applied to medical images and contours. The major bottleneck of the reconstruction is to remove shape inconsistency between contours and to generate the branching surface. In order to solve these problems, bi-directional smoothing and the composite contour generation method are proposed. Bi-directional smoothing has advantage of removing the shape inconsistency between contours and minimizing shrinkage effect with a large number of iterations. The composite contour by the proposed method ensures smooth transition in branching region.