On the edge of the seat: Reduced angular resolution of a light field cinema with fixed observer positions

Applications of Digital Image Processing XLI

et al. 2018

Self Cite

Light-field visualization allows the users to freely choose a preferred location for observation within the display's valid field of view. As such 3D visualization technology offers continuous motion parallax, the users location determines the perceived orientation of the visualized content, if we consider static objects and scenes. In case of interactive light-field visualization, the arbitrary rotation of content enables efficient orientation changes without the need for actual user movement. However, the preference of content orientation is a subjective matter, yet it is possible to be objectively managed and assessed as well. In this paper, we present a series of subjective tests we carried out on a real light-field display that addresses static content orientation preference. The state-of-the-art objective methodologies were used to evaluate the experimental setup and the content. We used the subjective results in order to develop our own objective metric for canonical orientation selection.

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Canonical 3D object orientation for interactive light-field visualization

Tamboli¹,

Kara²,

Applications of Digital Image Processing XLI

et al. 2018

Self Cite

“…Their subjective tests were conducted on the HoloVizio C80 light-field cinema system 7 . In this paper, the content was rendered at a recommended angular resolution of 2 views per degree [13]. Therefore, although no explicit angular distortions were studied in this paper, the objective results can be qualitatively compared to the perceptual quality of stimuli rendered at sufficient or high angular resolutions used in the aforementioned expert evaluation study.…”

Section: Discussionmentioning

confidence: 99%

“…In this section, we describe the LF content chosen for compression experiments [13]. A subset of this content was also used to derive stimuli for the expert evaluation of the s-t-phi format by Cserkaszky et al [12].…”

Section: Investigated Light-field Contentmentioning

confidence: 99%

Objective Quality Evaluation of an Angularly-Continuous Light-Field Format

Tamboli

2018 International Conference on 3D Immersion (IC3D)

Kara

et al. 2018

Self Cite

With the rapid advances in light-field display and camera technology, research in light-field content creation, visualization, coding and quality assessment has gained momentum. While light-field cameras are already available to the consumer, lightfield displays need to overcome several obstacles in order to become a commonplace. One of these challenges is the unavailability of a light-field visualization format which can be used across various light-field displays. Existing light-field representations are optimized for specific displays and converting them for visualization on a different display is a computationally expensive operation, often resulting in the degradation of perceptual quality. To this end, an intermediate, display-independent and angularly-continuous light-field representation format has been proposed recently, targeted towards large-field-of-view light-field displays. In this paper, we evaluate the said data format in terms of degradation in objective quality under three compression methods. We found that, while offering display-independence, the intermediate light-field format maintains the same objective quality in general and achieves higher objective quality in some cases compared to the conventional linear camera representation.

“…We also studied how having static observers may increase the tolerance towards angular resolution reduction [15]. Currently there is no consent within the research community whether test participants should be static during the tests and view light field visualization from a fixed viewing angle and distance, or observe the content from multiple discrete viewing positions, or even include actual user movement during assessment.…”

Section: The Concept Of Dynamic Adaptive Streaming Of Light Fielmentioning

confidence: 99%

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

Kara

IEEE Trans. on Broadcast.

Martini

et al. 2018

Self Cite

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.