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You searched for subject:(Stereo Exposure). Showing records 1 – 2 of 2 total matches.

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1. Costa, Anita Gabriela Moreira Nunes da. Consequências visuais da exposição a estímulos estereoscópicos.

Degree: 2014, RCAAP

A tecnologia de imagem tridimensional (3D) enriquece a experiência visual, através da inclusão da informação de profundidade. Atualmente, e embora todo o sucesso da técnica, muitos estudos demonstram as suas implicações na visão. Os utilizadores relatam queixas associadas á exposição estereoscópica, nomeadamente desconforto, fadiga visual, enjoos e dor de cabeça. Neste trabalho são estudadas as consequências visuais que resultam da exposição a estímulos estereoscópicos. Para 30 indivíduos com média de idade de 23; 33 4; 32 anos, foram medidos antes e após a visualização de um lme em 3D todos os parâmetros do sistema vergencial e a estereopsia. A exposição de estímulos estereoscópicos foi dividido em tês sessões com duração de 20 , 40 e 60 minutos em dias diferentes. O lme "HUGO" foi escolhido para produzir o estímulo visual, visualizado á distância de 1 metro. Foram observadas alterações estatisticamente signi cativas nos valores de estereopsia e reservas fusionais positivas após longos períodos de exposição. O mesmo não acontece para as reservas fusionais negativas. A heteroforia e a disparidade de xação apresentaram tendência signi cativa para a direção exo. Por conseguinte, conclui-se que a longa exposição a estímulos 3D poderá reduzir signi cativamente a estereopsia. A análise destes parâmetros e a sua possível relação com o cansaço visual é uma questão importante, tendo em conta o renovado interesse pelo conteúdo 3D entre os consumidores.

The three-dimensional (3D) technology enhances the viewing experience by adding the depth information. Currently, and although all the success of the technique, there are many studies that demonstrate some vision implications. Users reported complaints associated with stereoscopic display, especially discomfort, eyestrain, headaches and dizziness. Thus, in this work the visual consequences that result of the exposure to 3D stimulus in the near vision are studied. Hence, the whole vergence system and stereopsis of 30 subjects with 23; 33 4; 32 years were measured, before and after the visualization of a 3D movie. The exposure of stereoscopic stimulus was divided in 3 sessions with duration 20, 40 and 60 minutes in different days. The "HUGO" lm was chosen to produce the visual stimulus, watched with a viewing distance of 1 meter. Signi cant statistical changes in the values of stereopsis and positive fusional reserves after long exposures to 3D stimulus were observed. However, the same is not true for the negative fusional reserves, disparity xation and phoria. Therefore was concluded that long exposure to 3D stimuli signi cantly reduces the stereopsis. Moreover, the phoria and disparity xation tends to move in the exo direction. The analysis of these parameters and the relation with the typical visual fatigue that results of 3D stimulus exposure is an important issue considering the increased interest for 3D content among consumers.

Advisors/Committee Members: Ferreira, Francisco Brardo, Pinheiro, António Manuel Gonçalves.

Subjects/Keywords: Negative Fusional Reserves and Visual Fatigue; Phoria; Positive Fusional Reserves; Stereo Exposure; Stereopsis; Xation Disparity; Domínio/Área Científica::Ciências Médicas::Ciências da Saúde::Ciências da Visão

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Costa, A. G. M. N. d. (2014). Consequências visuais da exposição a estímulos estereoscópicos. (Thesis). RCAAP. Retrieved from https://www.rcaap.pt/detail.jsp?id=oai:ubibliorum.ubi.pt:10400.6/6172

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Costa, Anita Gabriela Moreira Nunes da. “Consequências visuais da exposição a estímulos estereoscópicos.” 2014. Thesis, RCAAP. Accessed April 14, 2021. https://www.rcaap.pt/detail.jsp?id=oai:ubibliorum.ubi.pt:10400.6/6172.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Costa, Anita Gabriela Moreira Nunes da. “Consequências visuais da exposição a estímulos estereoscópicos.” 2014. Web. 14 Apr 2021.

Vancouver:

Costa AGMNd. Consequências visuais da exposição a estímulos estereoscópicos. [Internet] [Thesis]. RCAAP; 2014. [cited 2021 Apr 14]. Available from: https://www.rcaap.pt/detail.jsp?id=oai:ubibliorum.ubi.pt:10400.6/6172.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Costa AGMNd. Consequências visuais da exposição a estímulos estereoscópicos. [Thesis]. RCAAP; 2014. Available from: https://www.rcaap.pt/detail.jsp?id=oai:ubibliorum.ubi.pt:10400.6/6172

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

2. Hoekstra, A.R.D. (author). 3D Audio for Virtual Reality Exposure Therapy.

Degree: 2013, Delft University of Technology

Virtual Reality Exposure Therapy (VRET) is an effective method to treat anxiety disorders and comes with many advantages over exposure in vivo, the latter being exposure in real-life. VRET is done by exposing patients gradually with their fear by using immersive virtual environments (VEs). Most attention in VRET research goes to visuals and less to audio, haptics, smell and taste. This report focuses on the use of audio, and in particular on 3D audio, in VRET systems. 3D audio is the only audio technique that is able to reproduce sounds as they are heard in real-life. Unlike other audio techniques, 3D audio uses a model of the human hearing in order to replicate accurate horizontal (azimuth), vertical (elevation) and distance information cues. Audio, especially combined with other modalities like vision, provides added value in terms of immersion. Audio is also indicated to have a significant effect on presence and presence is assumed to be a key factor in VRET performance. This report discusses if 3D audio can create more presence, anxiety and spatial perception compared to other commercially available audio techniques. This was done by doing three experiments, using stimuli of a flying wasp in order to generate a global sense of anxiety and/or discomfort. All audio was represented using headphones. Results indicate that people are able to hear differences in a direct comparison between 3D audio and mono, stereo and dolby headphones for the given wasp stimuli. People also report more presence and anxiety for 3D audio without the addition of visual information, but they don't focus on these differences anymore as soon as visual information is added to the audio. This is probably because the audio is overruled by the visuals when combining the information. Vision is known to be the dominant sense, and when combining audio with visuals, visuals "take over". As a consequence, different audio techniques may result in a similar experience. Suggestions are done for future research and it is currently advised to use stereo audio in a VRET system until future research shows otherwise. It is also stated that it may be more effective to increase the number of matching modalities instead of optimizing only one in particular.

Media & Knowledge Engineering

Interactive Intelligence

Electrical Engineering, Mathematics and Computer Science

Advisors/Committee Members: Brinkman, W.P. (mentor), Heynderickx, I. (mentor), Egmond, R. (mentor).

Subjects/Keywords: 3D audio; binaural; virtual reality exposure therapy; vret; exposure therapy; audio; stereo; dolby surround; dolby headphones; mono; headphones; vr; virtual reality; anxiety; fear; gradual exposure; sound; virtual environments; presence; immersion; spatial perception; sud score; sud; heart rate; galvanic skin response

…Involvement, Experienced Realism and Global Presence for mono, stereo, dolby surround and 3D audio… …4-5 Box plots of the SPQ and SSPQ data for mono, stereo, dolby surround and 3D audio… …4-6 Box plot of the SUD score data for mono, stereo, dolby surround and 3D audio. . 37 40… …experiment . . . . . 47 4-8 Box plot of the heart rate means data for mono, stereo, dolby… …Spatial Presence, Involvement, Experienced Realism and Global Presence for no audio, stereo and… 

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Hoekstra, A. R. D. (. (2013). 3D Audio for Virtual Reality Exposure Therapy. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:cee403d1-2999-4224-b71c-6dc3116dc1e1

Chicago Manual of Style (16th Edition):

Hoekstra, A R D (author). “3D Audio for Virtual Reality Exposure Therapy.” 2013. Masters Thesis, Delft University of Technology. Accessed April 14, 2021. http://resolver.tudelft.nl/uuid:cee403d1-2999-4224-b71c-6dc3116dc1e1.

MLA Handbook (7th Edition):

Hoekstra, A R D (author). “3D Audio for Virtual Reality Exposure Therapy.” 2013. Web. 14 Apr 2021.

Vancouver:

Hoekstra ARD(. 3D Audio for Virtual Reality Exposure Therapy. [Internet] [Masters thesis]. Delft University of Technology; 2013. [cited 2021 Apr 14]. Available from: http://resolver.tudelft.nl/uuid:cee403d1-2999-4224-b71c-6dc3116dc1e1.

Council of Science Editors:

Hoekstra ARD(. 3D Audio for Virtual Reality Exposure Therapy. [Masters Thesis]. Delft University of Technology; 2013. Available from: http://resolver.tudelft.nl/uuid:cee403d1-2999-4224-b71c-6dc3116dc1e1

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