59-3: Proper Luminance of HDR TV system

Fang, Jingyu; Xu, Haisong; Lv, Weige; Luo, M. Ronnier

doi:10.1002/sdtp.10795

Cited by 11 publications

(10 citation statements)

References 2 publications

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“…The performance of Peak brightness also shows the superiority of the OLED display: a higher local contrast and less image impairments make the perceptual luminance of highlight regions being brighter than its actual level. Though the VA LCD was physically brighter, it was visually dimmer than the OLED display because of the degradation of local contrast caused by the halos and glare on its screen (the proper luminance for displays to avoid glare is 600 cd/m²) [7]. Although the areas of color gamut of the three displays are very near, as can be seen in Figure 1, the visual results of Colorfulness show a big difference among them, which may also be caused by the different perceptions of visual contrast of the test displays.…”

Section: Resultsmentioning

confidence: 99%

81‐4: Image Quality Evaluation of HDR Displays

Qiu

et al. 2017

Symp Digest of Tech Papers

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We conducted psychophysical experiments to investigate the impacting factors on the image quality of HDR displays. The result indicated that the OLED display has advantages over IPS and VA LCDs due to its lower minimum luminance level and less pixel interaction, thus being an appropriate choice to display HDR contents. Keywordshigh dynamic range (HDR); display; image quality; psychophysical experiment.

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Section: Resultsmentioning

confidence: 99%

81‐4: Image Quality Evaluation of HDR Displays

Qiu

et al. 2017

Symp Digest of Tech Papers

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“…Meanwhile, various approaches from different perspectives have been examined to help select luminance and color gamut of display devices based on human perception and ergonomics as follows. For example, in terms of selecting luminance, optimal display luminance levels for HDR TVs under different illuminations and viewing conditions were suggested through a series of psychophysical experiments [2] . The optimal peak luminance levels were measured with simple black and white patches to determine the least luminance level, where more than 30% of the observers start to reporting discomfort glare.…”

Section: Introductionmentioning

confidence: 99%

Image quality equivalence between peak luminance and chromaticity gamut

Park

Murdoch

2020

J Soc Info Display

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This paper introduces a psychophysical experiment to investigate the image quality trade‐off relationship between peak luminance and the chromaticity area of the color gamut of a display device and models to predict equivalent image quality based on the experimental results. Our experimental results confirmed the hypothesis that the peak luminance required to maintain equivalent image quality tends to decrease as the color gamut area expands. At the same time, the relationship between peak luminance and color gamut strongly depends on image content. Based on the experimental results, two models are suggested. These models show good performance in terms of predicting the required luminance levels for given color gamut areas. Notably, the model built using an observer‐chosen region of interest (ROI) in an image slightly outperforms the model generated without this information.

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“…AMOLEDs are considered to be especially suitable for HDR content due to their beautiful blackness characteristics . For HDR displays, higher brightness levels are necessary to present content effectively . In general, however, a problem with AMOLED displays is the trade‐off in which the power consumption increases due to the higher brightness of the displays .…”

Section: Introductionmentioning

confidence: 99%

“…6 For HDR displays, higher brightness levels are necessary to present content effectively. 7 In general, however, a problem with AMOLED displays is the trade-off in which the power consumption increases due to the higher brightness of the displays. 8,9 Accordingly, display luminance levels need to be efficiently suppressed in order to properly manage the electric power necessary to drive larger AMOLED panels.…”

Section: Introductionmentioning

confidence: 99%

Picture level control method for bright regions of HDR images in power management of large AMOLED displays

et al. 2018

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Herein, a picture control method designed to facilitate power management of large active‐matrix organic‐light‐emitting‐diode displays is proposed. In this method, Hybrid Log‐Gamma (HLG) pictures are presented simply by multiplying the upper half of the picture level by the gain corresponding to the power suppression. HLG is a standard for high‐dynamic‐range images. The controlled picture is processed by nominal luminance transformation, as well as by color conversion from red–green–blue into hue–saturation–value (HSV) imagery. Results obtained via simulations show that high‐contrast HLG pictures can be better simulated by our proposed method than by currently used conventional methods. The simulation results also demonstrate that when the picture is presented using the proposed power consumption management method, both the dark and bright regions show less deterioration. In addition, through an examination of image histograms created to elucidate detail descriptions of simulated pictures in the red–green–blue and HSV color spaces, we found that using HSV color conversion in conjunction with the proposed method mitigates chromaticity shift and that the feasibility of HSV color conversions could be quantitatively clarified by the evaluation of color differences defined by the Euclidean distance in a uniform color space.

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59-3: Proper Luminance of HDR TV system

Cited by 11 publications

References 2 publications

81‐4: Image Quality Evaluation of HDR Displays

81‐4: Image Quality Evaluation of HDR Displays

Image quality equivalence between peak luminance and chromaticity gamut

Picture level control method for bright regions of HDR images in power management of large AMOLED displays

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