Optimal Local Dimming Based on an Improved Shuffled Frog Leaping Algorithm

Zhang, Tao; Zhao, Xin; Pan, Xihao; Li, Xuan; Lei, Zhichun

doi:10.1109/access.2018.2858827

Cited by 24 publications

(29 citation statements)

References 32 publications

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“…In [12], a Gaussian distribution model is proposed to reduce power consumption and improve image quality. In Swarm Intelligence (SI), the authors of [13,14] transformed the local backlight dimming to an optimization problem to preserve the image quality with low power consumption. A guided firework algorithm proposed in [14] achieves higher performance than the one in [13].…”

Section: Backlight Extractionmentioning

confidence: 99%

“…In Swarm Intelligence (SI), the authors of [13,14] transformed the local backlight dimming to an optimization problem to preserve the image quality with low power consumption. A guided firework algorithm proposed in [14] achieves higher performance than the one in [13]. Although there are other local dimming algorithms [15,16], most of them favor only specific characteristic of an image.…”

Section: Backlight Extractionmentioning

confidence: 99%

“…BL sm = IBMA BL op (13) where BL sm represents the backlight after IBMA and BL op is the optimal backlight. The comparison results of using or not using IBMA are shown in Figure 6.…”

Section: Pixel Compensation Modulementioning

confidence: 99%

“…The early method in [4] explores the maximum and the average luminance of the corresponding image block to determine the luminance level of each BLU. The following methods [5][6][7][8][9][10][11][12][13][14][15][16] extract luminance for BLUs from many other perspectives, such as image histogram, image details, and image quality. However, each method can hardly handle images with diverse and complicated contents.…”

Section: Introductionmentioning

confidence: 99%

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A Stronger Aadaptive Local Dimming Method with Details Preservation

Zhang

Zeng

et al. 2020

Applied Sciences

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Local dimming technology focuses on improving the contrast ratio of the displayed images for a great visual perception. It consists of backlight extraction and pixel compensation. Considering a single existing backlight extraction algorithm can hardly adapt to images with diverse characteristics and rich details, we propose a stronger adaptive local dimming method with details preservation in this paper. This method, combining the advantages of some existing methods and introducing the combination of the subjective evaluation and the objective evaluation, obtains a stronger adaptation compared with others. Besides, to offset the luminance reduction caused in the backlight extraction process, we improve the bi-histogram equalization algorithm and propose a new pixel compensation method. To preserve image details, the Retinex theory is adopted to separate details. Experimental results demonstrate the effect of the proposed method on contrast ratio improvement and details preservation.

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Section: Backlight Extractionmentioning

confidence: 99%

Section: Backlight Extractionmentioning

confidence: 99%

“…BL sm = IBMA BL op (13) where BL sm represents the backlight after IBMA and BL op is the optimal backlight. The comparison results of using or not using IBMA are shown in Figure 6.…”

Section: Pixel Compensation Modulementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A Stronger Aadaptive Local Dimming Method with Details Preservation

Zhang

Zeng

et al. 2020

Applied Sciences

Self Cite

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“…Our literature review shows that SFLA and its variants have been used in various areas, including water distribution network design [19], project management [36], knapsack problem [37], component pick-and-place problem [38], routing problem [39], gateway loading balance [40], local dimming optimization [41], underwater sonar image detention [42], job scheduling [43], big data [44], feature selection [45], etc. However, to our best knowledge, SFLA has never been used to deal with the BAP.…”

Section: The Basic Sflamentioning

confidence: 99%

An Improved Shuffled Frog-Leaping Algorithm for Solving the Dynamic and Continuous Berth Allocation Problem (DCBAP)

Hsu¹,

Chiang

2019

Applied Sciences

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This research deals with the dynamic and continuous berth allocation problem (DCBAP) in which both arrived and incoming ships are considered and a quay is used as a continuous line to accommodate as many ships as possible at one time. The DCBAP is solved by a two-stage procedure. In the first stage a heuristic/metaheuristic is used to generate alternative ship placement sequences while in the second stage a specific heuristic is employed to place ships and resolve overlaps of ships for the development of a feasible solution. Different methods, including FCFS (First Come First Served), SFLA (Shuffled Frog-Leaping Algorithm), and ISFLA (Improved Shuffled Frog-Leaping Algorithm), were employed in the first stage for comparison. The experimental results show that the ISFLA outperforms the others in terms of solution quality, implying that the ISFLA has the potential to deal with the DCBAP in a container terminal.

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Flicker‐Free Fringe‐Field Switching Liquid Crystal Display Operable at Extremely Low Frequencies for Power Saving

Choi

Lee

et al. 2021

Adv Eng Mater

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A fringe‐field switching (FFS) liquid crystal (LC) mode used with a negative dielectric LC (n‐LC) that is operable at an extremely low‐frequency signal voltage regime, without image flickering, is proposed. By doping charge‐trapping fullerenes (doping concentration: 0.2 wt%) into a low‐resistivity polyimide LC alignment layer of the FFS n‐LC mode, the mobile ionic‐charge density within the n‐LC layer can be drastically decreased. Thus, excellent voltage‐holding ratios of 98.24% and 87.91% are achievable in the proposed FFS n‐LC mode at low operation frequencies of 0.5 Hz and 0.2 Hz, respectively, corresponding to the improvement rates of 155.69% and 1127.05% at each operation frequency, compared with the FFS n‐LC mode without the fullerene doping case. The evaluation results by the modulation flicker level reveal that the operation frequency of the proposed device scheme can be decreased significantly (≈0.2 Hz) without inducing the perceptible image‐flickering problems.

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Optimal Local Dimming Based on an Improved Shuffled Frog Leaping Algorithm

Cited by 24 publications

References 32 publications

A Stronger Aadaptive Local Dimming Method with Details Preservation

A Stronger Aadaptive Local Dimming Method with Details Preservation

An Improved Shuffled Frog-Leaping Algorithm for Solving the Dynamic and Continuous Berth Allocation Problem (DCBAP)

Flicker‐Free Fringe‐Field Switching Liquid Crystal Display Operable at Extremely Low Frequencies for Power Saving

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