Proceedings of the 15th ACM Symposium on Applied Perception最新文献_第2页

The role of avatar fidelity and sex on self-motion recognition 化身保真度和性别在自我动作识别中的作用

Proceedings of the 15th ACM Symposium on Applied Perception Pub Date : 2018-08-10 DOI: 10.1145/3225153.3225176

A. Thaler, Anna C. Wellerdiek, Markus Leyrer, E. Volkova-Volkmar, N. Troje, B. Mohler

{"title":"The role of avatar fidelity and sex on self-motion recognition","authors":"A. Thaler, Anna C. Wellerdiek, Markus Leyrer, E. Volkova-Volkmar, N. Troje, B. Mohler","doi":"10.1145/3225153.3225176","DOIUrl":"https://doi.org/10.1145/3225153.3225176","url":null,"abstract":"Avatars are important for games and immersive social media applications. Although avatars are still not complete digital copies of the user, they often aim to represent a user in terms of appearance (color and shape) and motion. Previous studies have shown that humans can recognize their own motions in point-light displays. Here, we investigated whether recognition of self-motion is dependent on the avatar's fidelity and the congruency of the avatar's sex with that of the participants. Participants performed different actions that were captured and subsequently remapped onto three different body representations: a point-light figure, a male, and a female virtual avatar. In the experiment, participants viewed the motions displayed on the three body representations and responded to whether the motion was their own. Our results show that there was no influence of body representation on self-motion recognition performance, participants were equally sensitive to recognize their own motion on the point-light figure and the virtual characters. In line with previous research, recognition performance was dependent on the action. Sensitivity was highest for uncommon actions, such as dancing and playing ping-pong, and was around chance level for running, suggesting that the degree of individuality of performing certain actions affects self-motion recognition performance. Our results show that people were able to recognize their own motions even when individual body shape cues were completely eliminated and when the avatar's sex differed from own. This suggests that people might rely more on kinematic information rather than shape and sex cues for recognizing own motion. This finding has important implications for avatar design in game and immersive social media applications.","PeriodicalId":185507,"journal":{"name":"Proceedings of the 15th ACM Symposium on Applied Perception","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116253659","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

An appearance uniformity metric for 3D printing 3D打印的外观均匀度度量

Proceedings of the 15th ACM Symposium on Applied Perception Pub Date : 2018-08-10 DOI: 10.1145/3225153.3225169

Michael Ludwig, G. Meyer, I. Tastl, N. Moroney, Melanie Gottwals

{"title":"An appearance uniformity metric for 3D printing","authors":"Michael Ludwig, G. Meyer, I. Tastl, N. Moroney, Melanie Gottwals","doi":"10.1145/3225153.3225169","DOIUrl":"https://doi.org/10.1145/3225153.3225169","url":null,"abstract":"A method is presented for perceptually characterizing appearance non-uniformities that result from 3D printing. In contrast to physical measurements, the model is designed to take into account the human visual system and variations in observer conditions such as lighting, point of view, and shape. Additionally, it is capable of handling spatial reflectance variations over a material's surface. Motivated by Schrödinger's line element approach to studying color differences, an image-based psychophysical experiment that explores paths between materials in appearance space is conducted. The line element concept is extended from color to spatially-varying appearances-including color, roughness and gloss-which enables the measurement of fine differences between appearances along a path. We define two path functions, one interpolating reflectance parameters and the other interpolating the final imagery. An image-based uniformity model is developed, applying a trained neural network to color differences calculated from rendered images of the printed non-uniformities. The final model is shown to perform better than commonly used image comparison algorithms, including spatial pattern classes that were not used in training.","PeriodicalId":185507,"journal":{"name":"Proceedings of the 15th ACM Symposium on Applied Perception","volume":"311 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117070530","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Individual differences and impact of gender on curvature redirection thresholds 个体差异及性别对曲率重定向阈值的影响

Proceedings of the 15th ACM Symposium on Applied Perception Pub Date : 2018-08-10 DOI: 10.1145/3225153.3225155

Anh Nguyen, Yannick Rothacher, B. Lenggenhager, P. Brugger, A. Kunz

{"title":"Individual differences and impact of gender on curvature redirection thresholds","authors":"Anh Nguyen, Yannick Rothacher, B. Lenggenhager, P. Brugger, A. Kunz","doi":"10.1145/3225153.3225155","DOIUrl":"https://doi.org/10.1145/3225153.3225155","url":null,"abstract":"To enable real walking in a virtual environment (VE) that is larger than the available physical space, redirection techniques that introduce multisensory conflicts between visual and nonvisual cues to manipulate different aspects of a user's trajectory could be applied. When applied within certain thresholds, these manipulations could go unnoticed and immersion remains intact. Research effort has been spent on identifying these thresholds and a wide range of thresholds was reported in different studies. These differences in thresholds could be explained by many factors such as individual differences, walking speed, or context settings such as environment design, cognitive load, distractors, etc. In this paper, we present a study to investigate the role of gender on curvature redirection thresholds (RDTs) using the maximum likelihood procedure with the classical two-alternative force choice task. Results show high variability in individuals' RDTs, and that on average women have higher curvature RDTs than men. Furthermore, results also confirm existing findings about the negative correlation between walking speed and curvature RDTs.","PeriodicalId":185507,"journal":{"name":"Proceedings of the 15th ACM Symposium on Applied Perception","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114279433","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 18

Foveated depth-of-field filtering in head-mounted displays 头戴式显示器的焦点景深滤波

Proceedings of the 15th ACM Symposium on Applied Perception Pub Date : 2018-08-10 DOI: 10.1145/3225153.3243894

Martin Weier, T. Roth, André Hinkenjann, P. Slusallek

{"title":"Foveated depth-of-field filtering in head-mounted displays","authors":"Martin Weier, T. Roth, André Hinkenjann, P. Slusallek","doi":"10.1145/3225153.3243894","DOIUrl":"https://doi.org/10.1145/3225153.3243894","url":null,"abstract":"In recent years, a variety of methods have been introduced to exploit the decrease in visual acuity of peripheral vision, known as foveated rendering. As more and more computationally involved shading is requested and display resolutions increase, maintaining low latencies is challenging when rendering in a virtual reality context. Here, foveated rendering is a promising approach for reducing the number of shaded samples. However, besides the reduction of the visual acuity, the eye is an optical system, filtering radiance through lenses. The lenses create depth-of-field (DoF) effects when accommodated to objects at varying distances. The central idea of this article is to exploit these effects as a filtering method to conceal rendering artifacts. To showcase the potential of such filters, we present a foveated rendering system, tightly integrated with a gaze-contingent DoF filter. Besides presenting benchmarks of the DoF and rendering pipeline, we carried out a perceptual study, showing that rendering quality is rated almost on par with full rendering when using DoF in our foveated mode, while shaded samples are reduced by more than 69%.","PeriodicalId":185507,"journal":{"name":"Proceedings of the 15th ACM Symposium on Applied Perception","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123672713","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 16

Learning to feel words: a comparison of learning approaches to acquire haptic words 感受词汇的学习:触觉词汇学习方法的比较

Proceedings of the 15th ACM Symposium on Applied Perception Pub Date : 2018-08-10 DOI: 10.1145/3225153.3225174

Jennifer Chen, Robert G. Turcott, Pablo Castillo, W. Setiawan, Frances Lau, A. Israr

引用次数: 10

Assessing vignetting as a means to reduce VR sickness during amplified head rotations 评估视晕作为在头部放大旋转期间减少VR疾病的一种手段

Proceedings of the 15th ACM Symposium on Applied Perception Pub Date : 2018-08-10 DOI: 10.1145/3225153.3225162

Nahal Norouzi, G. Bruder, G. Welch

{"title":"Assessing vignetting as a means to reduce VR sickness during amplified head rotations","authors":"Nahal Norouzi, G. Bruder, G. Welch","doi":"10.1145/3225153.3225162","DOIUrl":"https://doi.org/10.1145/3225153.3225162","url":null,"abstract":"Redirected and amplified head movements have the potential to provide more natural interaction with virtual environments (VEs) than using controller-based input, which causes large discrepancies between visual and vestibular self-motion cues and leads to increased VR sickness. However, such amplified head movements may also exacerbate VR sickness symptoms over no amplification. Several general methods have been introduced to reduce VR sickness for controller-based input inside a VE, including a popular vignetting method that gradually reduces the field of view. In this paper, we investigate the use of vignetting to reduce VR sickness when using amplified head rotations instead of controller-based input. We also investigate whether the induced VR sickness is a result of the user's head acceleration or velocity by introducing two different modes of vignetting, one triggered by acceleration and the other by velocity. Our dependent measures were pre and post VR sickness questionnaires as well as estimated discomfort levels that were assessed each minute of the experiment. Our results show interesting effects between a baseline condition without vignetting, as well as the two vignetting methods, generally indicating that the vignetting methods did not succeed in reducing VR sickness for most of the participants and, instead, lead to a significant increase. We discuss the results and potential explanations of our findings.","PeriodicalId":185507,"journal":{"name":"Proceedings of the 15th ACM Symposium on Applied Perception","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134151545","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 35

Analysis of neural correlates of saccadic eye movements 跳眼运动的神经关联分析

Proceedings of the 15th ACM Symposium on Applied Perception Pub Date : 2018-08-10 DOI: 10.1145/3225153.3225164

J. Tauscher, F. W. Schottky, S. Grogorick, M. Magnor, Maryam Mustafa

引用次数: 2

Virtual shadows for real humans in a CAVE: influence on virtual embodiment and 3D interaction 洞穴中真实人类的虚拟阴影:对虚拟化身和3D交互的影响

Proceedings of the 15th ACM Symposium on Applied Perception Pub Date : 2018-08-10 DOI: 10.1145/3225153.3225165

G. Cortes, F. Argelaguet, É. Marchand, A. Lécuyer

{"title":"Virtual shadows for real humans in a CAVE: influence on virtual embodiment and 3D interaction","authors":"G. Cortes, F. Argelaguet, É. Marchand, A. Lécuyer","doi":"10.1145/3225153.3225165","DOIUrl":"https://doi.org/10.1145/3225153.3225165","url":null,"abstract":"In immersive projection systems (IPS), the presence of the user's real body limits the possibility to elicit a virtual body ownership illusion. But, is it still possible to embody someone else in an IPS even though the users are aware of their real body? In order to study this question, we propose to consider using a virtual shadow in the IPS, which can be similar or different from the real user's morphology. We have conducted an experiment (N=27) to study the users' sense of embodiment whenever a virtual shadow was or was not present. Participants had to perform a 3D positioning task in which accuracy was the main requirement. The results showed that users widely accepted their virtual shadow (agency and ownership) and felt more comfortable when interacting with it (compare to no virtual shadow). Yet, due to the awareness of their real body, the users have less acceptance of the virtual shadow whenever the shadow gender differs from their own. Furthermore, the results showed that virtual shadows increase the users' spatial perception of the virtual environment by decreasing the inter-penetrations between the user and the virtual objects. Taken together, our results promote the use of dynamic and realistic virtual shadows in IPS and pave the way for further studies on \"virtual shadow ownership\" illusion.","PeriodicalId":185507,"journal":{"name":"Proceedings of the 15th ACM Symposium on Applied Perception","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134205827","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 9