Contrast Enhancement Based on Layered Difference Representation of 2D Histograms
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1,364 citations
Cites background or methods from "Contrast Enhancement Based on Layer..."
...For instance, contextual and variational contrast enhancement (CVC) [6] tries to find a histogram mapping that pays attention on large gray-level differences, while the work [7] achieves improvement by seeking a layered difference representation of 2D histograms (LDR)....
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...Equalization (AHE), Gamma Correction (GC), Contextual and Variational Contrast enhancement (CVC) [6], Layered Difference Representation (LDR) [7], dehazing based method [14] (DeHz), Multi-deviation Fusion method (MF) [12], Naturalness Preserved Enhancement algorithm (NPE) [11] and Simultaneous Reflection and Illumination Estimation (SRIE) [13]....
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464 citations
Cites background or methods from "Contrast Enhancement Based on Layer..."
...In this experiment, we use 40 different kinds of weakly illumination images and enhance them using [1,10,16,20,22,23] and our proposed method....
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...As the global brightness darkens, LDR [1] and GUM [23] fail to improve the visibility and the building cannot be seen clearly....
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...Input images and other six methods [1,10,16,20,22,23] correspond to 0....
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...The proposed method requires a slightly longer running time than LDR [1] and GUM [23], while significantly less time than CVC [10], NEPA [20] and GOLW [22]....
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...We compare the proposed method with six other image enhancement methods: two Retinex-based methods, MSR [16] and NPEA [20], two histogram-based methods, CVC [10] and LDR [1], and two filtering-based methods, GUM [23] and GOLW [22]....
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447 citations
Cites background from "Contrast Enhancement Based on Layer..."
...Histogram distribution of images is adjusted at both global [6, 9] and local levels [23, 13]....
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428 citations
Cites background from "Contrast Enhancement Based on Layer..."
...One technical line, with histogram equalization (HE) [1], [2], [3] and its follow-ups [4], [5] as representatives, tries to map the value range into [0, 1] and balance the histogram of outputs for avoiding the truncation problem....
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300 citations
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"Contrast Enhancement Based on Layer..." refers background in this paper
...(12) This implies that the output transformation function should increase linearly between xk and xk+l....
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6,853 citations
"Contrast Enhancement Based on Layer..." refers background in this paper
...However, finding the sparsest solutions is NP-hard [25], and the solution dl to our problem cannot be sparse due to the constraints in (10) and (11)....
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6,136 citations