The Effect of Light Field Reconstruction and Angular Resolution Reduction on the Quality of Experience

Kara, Péter A.; Kovács, Péter Tamás; Vagharshakyan, Suren; Martini, Maria G.; Barsi, Attila; Balogh, Tibor; Chuchvara, Aleksandra; Chehaibi, Ahmed

doi:10.1109/sitis.2016.128

Cited by 15 publications

(24 citation statements)

References 7 publications

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“…Yet it needs to be noted that in this research angular resolution was only reduced from 0.5 to 1 degree, which can be considered a borderline of toleration [14] [15] [16]. We expect that further, larger extents of reductions in angular resolution could easily reverse this ratio, as users would rather wait 1500 ms than face severe visual degradations (e.g., see Figure 2).…”

Section: Resultsmentioning

confidence: 78%

“…We chose the higher value because according to previous studies [42] [16], it can provide a smooth horizontal motion parallax and thus a good user experience (at least in that regard). The lower value was chosen for multiple reasons.…”

Section: A Test Conditions and Video Contentmentioning

confidence: 99%

“…The test participants had to compare them in a full paired comparison test, using a 5-point discrete comparison scale. The concept that this paper addresses was initially proposed and briefly introduced in our prior publication [13], and several experiments involving subjective tests were performed to investigate the underlying perceptual thresholds and phenomena, such as the perceived angular resolution [14] [15] [16], spatial resolution [17] and the interdependence between them [18]. The tests in these experiments used still content for quality evaluation purposes.…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of the Concept of Dynamic Adaptive Streaming of Light Field Video

Kara

Cserkaszky

Martini

et al. 2018

IEEE Trans. on Broadcast.

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Abstract-Light field visualization has progressed and developed significantly in the past years. At the time of this paper, light field displays are utilized in the industry and they are commercially available as well. Although their appearance on the consumer market is approaching, many potential applications of light field technology have not yet been addressed, such as video streaming. In this paper, we present our research on the dynamic adaptive streaming of light field video. In order to evaluate the presented concept of quality switching, we carried out a series of subjective tests, where test participants were shown light field videos containing stallings and switches in spatial and angular resolution.

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Section: Resultsmentioning

confidence: 78%

Section: A Test Conditions and Video Contentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Evaluation of the Concept of Dynamic Adaptive Streaming of Light Field Video

Kara

Cserkaszky

Martini

et al. 2018

IEEE Trans. on Broadcast.

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“…In case the captured medical content does not have the required angular resolution, estimative techniques such as interpolation can be used to increase the density. Although it has already proven to enhance the perceived quality despite the inaccuracies of synthesis, 20 and the content may become more appealing visually through the increased content contrast, 21 again, it may result in errors in medical diagnostics. Future research on interpolation involving medical experts shall prove to be beneficial in the design and standardization of light-field visualization for medical use cases.…”

Section: Discussion On Visualizationmentioning

confidence: 99%

The potential synergies of visual scene reconstruction and medical image reconstruction

Cserkaszky

Kara²,

Barsi

et al. 2018

Novel Optical Systems Design and Optimization XXI

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Image reconstruction in nuclear medicine produces valuable volumetric data of vital markers in living bodies. Visual scene reconstruction methods, that aim to recreate a scene from camera images, are also continuously improved by the recent advancements of light-fields and camera systems. The parallels of the two fields are increasingly noticeable as we now have the computing power and methods to take into account transparent materials and ray trace the scattering and other effects of lights for visual scene reconstruction. In this paper, we aim to highlight and analyze the similarities and potential synergies of the two methods.

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“…The research on perceived quality carried out by Kara et al exhaustively investigated content spatial and angular resolution. Their findings point out the possible compromises with spatial resolution, as lower values come with no pixelation that is uniform across the entire scene in the plane of the display.…”

Section: The Perceived Quality Of Light‐field Visualizationmentioning

confidence: 99%

Angularly continuous light‐field format: Concept, implementation, and evaluation

et al. 2019

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In this paper, we present the concept, the implementation, and the evaluation of our novel angularly continuous light-field format. We compared the subjective visual performance of our format with the perspective camera format through a series of subjective and objective tests. In our extensive subjective study, we used multiple absolute and comparative rating scales and various visual stimuli with different contents and angular resolutions. The perceived quality was assessed by a total of 36 test participants, who were separated based on their scientific expertise. The objective quality was evaluated through the degradations caused by three well-known compression methods. The obtained results indicate that our light-field format may outperform the conventional format, and it generally can provide at least equivalent visual quality. Furthermore, these findings open the way for data size optimization, without compromising the achieved level of perceived quality.

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The Effect of Light Field Reconstruction and Angular Resolution Reduction on the Quality of Experience

Cited by 15 publications

References 7 publications

Evaluation of the Concept of Dynamic Adaptive Streaming of Light Field Video

Evaluation of the Concept of Dynamic Adaptive Streaming of Light Field Video

The potential synergies of visual scene reconstruction and medical image reconstruction

Angularly continuous light‐field format: Concept, implementation, and evaluation

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