Evaluation of Tone Mapping Operators for HDR Video

Eilertsen, Gabriel; Unger, Jonas; Mantiuk, Rafał

doi:10.1016/b978-0-08-100412-8.00007-3

Cited by 22 publications

(37 citation statements)

References 24 publications

(8 reference statements)

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“…A great deal of effort has been devoted to developing dynamic tonemapping algorithms that more effectively use the display's color reproduction capability to match the creative intent. The main challenge has been that these algorithms should not create flicker problems or other transient image artifacts . One approach is to use a scene‐specific tonemapping operator that is updated at each scene.…”

Section: Discussionmentioning

confidence: 99%

“…The remaining pixels were tone mapped such that pixel values from 250 nits to the Maximum Content Light Level (maxCLL, representing the maximum brightness for full content) mapped monotonically from 250 nits to the emulation display peak level of 500 nits following a nonlinear compressive function. No dynamic adjustment of the tonemapping function was used as it has the potential to create other temporal artifacts, including flicker that could mask the backlight control artifacts …”

Section: Methodsmentioning

confidence: 99%

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Efficacy of global dimming backlight and high‐contrast liquid crystal panel for high‐dynamic‐range displays

Choi

Hoffman

2017

J Soc Info Display

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Using an RGB organic light‐emitting diode display to emulate liquid crystal display systems, we examined the efficacy of different global dimming strategies for cinematic content. A global dimming solution with smoothed transitions was preferred over solutions using a static backlight level or the highly aggressive frame‐by‐frame backlight adjustment scheme. We compared two such smoothing approaches, one making use of causal data, and another using future information (which could be available via latency or dynamic metadata) and did observe some opportunities for an improved experience, but found the causal data to be a competitive approach. We also evaluated the importance of native panel contrast and how global dimming compares to local dimming approaches. For most content tested, a global dimming display with a high‐contrast liquid crystal panel was judged as being equivalent or more preferred to a full‐array local dimming display with a low‐contrast panel. These results build on the existing evidence that native panel contrast remains one of the strongest predictors of high‐dynamic‐range image quality even as backlight technologies continue to improve.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Efficacy of global dimming backlight and high‐contrast liquid crystal panel for high‐dynamic‐range displays

Choi

Hoffman

2017

J Soc Info Display

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“…Lee et al [18] extended gradient domain tone mapping operator presented in [11] to HDR video by incorporating motion field into Poisson equation. Recently, Gabriel et al [19] have given evaluation of tone mapping operators for HDR video.…”

Section: Related Workmentioning

confidence: 99%

Underexposed Video Enhancement via Perception-Driven Progressive Fusion

Zhang

Nie

Zhang

et al. 2016

IEEE Trans. Visual. Comput. Graphics

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Underexposed video enhancement aims at revealing hidden details that are barely noticeable in LDR video frames with noise. Previous work typically relies on a single heuristic tone mapping curve to expand the dynamic range, which inevitably leads to uneven exposure and visual artifacts. In this paper, we present a novel approach for underexposed video enhancement using an efficient perception-driven progressive fusion. For an input underexposed video, we first remap each video frame using a series of tentative tone mapping curves to generate an multi-exposure image sequence that contains different exposed versions of the original video frame. Guided by some visual perception quality measures encoding the desirable exposed appearance, we locate all the best exposed regions from multi-exposure image sequences and then integrate them into a well-exposed video in a temporally consistent manner. Finally, we further perform an effective texture-preserving spatio-temporal filtering on this well-exposed video to obtain a highquality noise-free result. Experimental results have shown that the enhanced video exhibits uniform exposure, brings out noticeable details, preserves temporal coherence, and avoids visual artifacts. Besides, we demonstrate applications of our approach to a set of problems including video dehazing, video denoising and HDR video reconstruction. he visited University of California-Davis for one year.His main interests include image and video processing, digital geometry processing, and computational photography. He is a member of IEEE.

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“…Because of the lack of high-quality HDR video content, the temporal coherency aspect of tone mapping has been dismissed for a long time. Several studies point out that naively applying a TMO to each frame of an HDR video sequence leads to different types of temporal artifacts [45], [46]. Recent works [47], [48] have addressed some of the problems inherent to video tone mapping, focusing either on their computational cost or their suitability for real-time applications.…”

Section: Color/tone Mapping and Inverse Color/tone Mappingmentioning

confidence: 99%

Demystifying High-Dynamic-Range Technology: A new evolution in digital media

Boitard

Pourazad

Nasiopoulos

et al. 2015

IEEE Consumer Electron. Mag.

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H igh-dynamic-range (HDR) technology has attracted a lot of attention recently, especially in commercial trade shows such as the Consumer Electronics Show, the National Association of Broadcasters Show, the International Broadcasting Convention, and Internationale Funkausstellung Berlin. However, a great deal of mystery still surrounds this new evolution in digital media.A new evolution in digital media.

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Evaluation of Tone Mapping Operators for HDR Video

Cited by 22 publications

References 24 publications

Efficacy of global dimming backlight and high‐contrast liquid crystal panel for high‐dynamic‐range displays

Efficacy of global dimming backlight and high‐contrast liquid crystal panel for high‐dynamic‐range displays

Underexposed Video Enhancement via Perception-Driven Progressive Fusion

Demystifying High-Dynamic-Range Technology: A new evolution in digital media

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