Evaluation of tone mapping operators in night-time virtual worlds

Petit, Josselin; Brémond, Roland; Tom, Ariane

doi:10.1007/s10055-012-0215-4

Cited by 6 publications

(4 citation statements)

References 29 publications

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“…Nine TMOs were then selected to conduct performance comparisons with the built-in video camera output (hereafter referred to as Video), based on their coverage of a wide range of algorithmic approaches, their usage in previous VR research (Petit et al, 2012;Melo et al, 2018;Chamilothori, 2019), and their availability through open-source implementations (Radiance and pfstools). Seven of these TMOs are sourced from publications (Ward, 1997;Pattanaik, 2000;Durand 2002;Reinhard, 2002;Drago, 2003;Reinhard, 2005; and are labeled by primary author and two-digit year for brevity.…”

Section: Tone Mapping Comparisonsmentioning

confidence: 99%

CIE x050:2023 Proceedings of the 30th Session of the CIE, Ljubljana, Slovenia, September 15 – 23, 2023, Volume 1

2023

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Current view representation methods for Virtual Reality (VR), monitors, and projection screens predominantly rely on static photographs and tone-mapping operators without temporal variations, limiting the exploration of dynamic features in a view. Capturing views with real-time video overcomes this limitation but has a limited dynamic range and relies on an unverified built-in tone-mapping process. This study investigates the adequacy and reliability of using realtime video captures of dynamic daylit views in VR. To evaluate the suitability of the camera's built-in tone-mapping procedures, a comparison to normative tone-mapping operators is conducted with a focus on brightness and contrast, based on pixel-by-pixel luminance values from calibrated high dynamic range images. This study finds that real-time video reliably maintains relative contrast, enabling more comprehensive investigations in future studies involving dynamic movements and temporal changes in VR. Furthermore, the proposed method provides the foundations to establish a workflow generalizable to new experimental approaches for the validation of tone-mapping in VR environments.

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Section: Tone Mapping Comparisonsmentioning

confidence: 99%

CIE x050:2023 Proceedings of the 30th Session of the CIE, Ljubljana, Slovenia, September 15 – 23, 2023, Volume 1

2023

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“…Another possibility, which is the one we used in our experiments, is to have the participants rank the tone mapped images against a reference. Previous TMO evaluations that have used psychophysical experiments include work by [21], [22], [23], [24], [25], [26].…”

Section: Tmo Evaluationmentioning

confidence: 99%

“…More recently Petit et al [26] investigated images within virtual environments. These studies consisted of two experiments that tested TMOs not on predetermined scenes but rather within a virtual environment with dynamically changing environmental conditions.…”

Section: Tmo Evaluationmentioning

confidence: 99%

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Evaluation of HDR video tone mapping for mobile devices

Melo

Bessa

Debattista

et al. 2014

Signal Processing: Image Communication

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Tone mapping operators (TMOs) allow the visual appearance of High Dynamic Range (HDR) video to be reproduced on Low Dynamic Range (LDR) displays. While several studies have been made to compare the performance of different TMOs on standard displays, there is only one preliminary study that take into account the characteristics of Small Screen Devices, common on mobile platforms. Due to the unique characteristics of mobile devices, the variety of viewing conditions where they are used, and the fact that they are becoming so widespread, it is important to identify what is the best method to deliver HDR video content to these devices. This paper presents an evaluation of HDR video using and HDR display as reference as well as six state-of-the-art HDR video tone mappers by conducting a psychophysical experiment where participants were asked to rank the tone mappers applied to different HDR video footage. A comparison was made between tone mapped HDR video footage shown on a tablet and an LCD display compared with the same HDR video footage shown on an HDR display. This study shows interesting results like the fact that for each display results obtained are different but the the preferred TMOs order remains the same.

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