Author Affiliations
School of Electronic Information Engineering, Changchun University of Science and Technology, Changchun, Jilin 130022, Chinashow less
Fig. 1. Flow chart of proposed algorithm
Fig. 2. Contrast before and after details enhancement. (a) Before processing; (b)after processing
Fig. 3. Comparison of the enhancement effects of various algorithms in scene1.(a) Original image; (b) MSR; (c) ALTM; (d) MF; (e) Ref. [14] algorithm; (f) proposed algorithm
Fig. 4. Comparison of the enhancement effects of various algorithms in scene2. (a) Original image; (b)MSR; (c) ALTM; (d) MF; (e) Ref. [14] algorithm; (f) proposed algorithm
Fig. 5. Comparison of the enhancement effects of various algorithms in scene3. (a) Original image; (b) MSR; (c) ALTM; (d) MF; (e) Ref. [14] algorithm; (f) proposed algorithm
Fig. 6. Comparison of the enhancement effects of various algorithms in scene4. (a) Original image; (b) MSR; (c) ALTM; (d) MF; (e) Ref. [14] algorithm; (f) proposed algorithm
Fig. 7. Comparison of the enhancement effects of various algorithms in scene5. (a) Original image; (b) MSR; (c) ALTM; (d) MF; (e) Ref. [14] algorithm; (f) proposed algorithm
Algorithm | Parameter |
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MSR | σ1=15,σ2=80,σ3=250 | ALTM | σ=0.001 | MF | σ=0.025,μ=0.5,α=2,φ=250° | Ref. [14] | ε=0.01, λr=0.001,λs=0.01,λb=0.15 |
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Table 1. Selection of parameters for comparison algorithms
Figure | MSR | ALTM | MF | Ref. [14] algorithm | Proposed algorithm |
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Fig. 3 | 328.6 | 215.1 | 433.7 | 636.7 | 231.5 | Fig. 4 | 352.8 | 833.9 | 760.7 | 687.8 | 145.4 | Fig. 5 | 255.8 | 488.0 | 609.5 | 566.6 | 176.1 | Fig. 6 | 420.3 | 652.2 | 454.0 | 701.7 | 283.9 | Fig. 7 | 381.1 | 202.3 | 675.0 | 902.9 | 324.1 | Average | 347.7 | 478.3 | 586.6 | 699.1 | 232.2 |
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Table 2. Quantitative evaluation table of LOE
Figure | Original image | MSR | ALTM | MF | Ref. [14] algorithm | Proposed algorithm |
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Fig. 3 | 6.3698 | 6.5552 | 7.3236 | 7.5411 | 7.3504 | 7.3883 | Fig. 4 | 5.7130 | 6.1958 | 6.2335 | 5.9350 | 6.2706 | 6.6912 | Fig. 5 | 5.9424 | 6.8171 | 6.8503 | 6.5728 | 6.6456 | 7.1247 | Fig. 6 | 5.8426 | 6.8431 | 6.8884 | 6.8987 | 6.8589 | 6.9993 | Fig. 7 | 6.7449 | 7.4020 | 7.4344 | 7.5643 | 7.3847 | 7.6231 |
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Table 3. Quantitative evaluation table of entropy
Figure | Original image | MSR | ALTM | MF | Ref. [14] algorithm | Proposed algorithm |
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Fig. 3 | 0.0123 | 0.0166 | 0.0153 | 0.0196 | 0.0162 | 0.0165 | Fig. 4 | 0.0148 | 0.0380 | 0.0351 | 0.0275 | 0.0248 | 0.0415 | Fig. 5 | 0.0168 | 0.0506 | 0.0401 | 0.0364 | 0.0313 | 0.0453 | Fig. 6 | 0.0226 | 0.0369 | 0.0358 | 0.0389 | 0.0338 | 0.0448 | Fig. 7 | 0.0637 | 0.0604 | 0.0709 | 0.0934 | 0.0828 | 0.0841 |
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Table 4. Quantitative evaluation table of gradient energy