• Laser & Optoelectronics Progress
  • Vol. 57, Issue 20, 201022 (2020)
Ruoyou Wu, Dexing Wang*, and Hongchun Yuan*
Author Affiliations
  • School of Information, Shanghai Ocean University, Shanghai 201306, China
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    DOI: 10.3788/LOP57.201022 Cite this Article Set citation alerts
    Ruoyou Wu, Dexing Wang, Hongchun Yuan. Low-Light Image Enhancement Based on Attention Mechanism and Convolutional Neural Networks[J]. Laser & Optoelectronics Progress, 2020, 57(20): 201022 Copy Citation Text show less
    A-Unet network structure
    Fig. 1. A-Unet network structure
    Algorithm flowchart
    Fig. 2. Algorithm flowchart
    Examples of sample data
    Fig. 3. Examples of sample data
    Qualitative comparison of synthetic low-light images obtained by different algorithms. (a) Image “flowersonih35”; (b) image “plane”; (c) image “house”; (d) image “lighthouse”
    Fig. 4. Qualitative comparison of synthetic low-light images obtained by different algorithms. (a) Image “flowersonih35”; (b) image “plane”; (c) image “house”; (d) image “lighthouse”
    Qualitative comparison of different algorithms on real low-light images. (a)(c) Images from DICM dataset; (b) image from LIME dataset; (d) image from MEF dataset
    Fig. 5. Qualitative comparison of different algorithms on real low-light images. (a)(c) Images from DICM dataset; (b) image from LIME dataset; (d) image from MEF dataset
    ImagePSNR /dBSSIM
    LMSELSSIMLtotalLMSELSSIMLtotal
    img15123.082023.498025.83300.73530.81260.8161
    img16522.729225.337826.55700.78320.81180.8115
    img16725.433022.835027.48500.84590.89290.9000
    img16826.301019.462026.19400.89430.91100.9253
    img16925.062024.964026.15800.83280.87340.8752
    Average±SD24.5200±1.380023.2200±2.090026.4500±0.57000.8180±0.05500.8600±0.04100.8660±0.0450
    Table 1. Performance comparison of different loss functions
    ImageMSEPSNR /dBSSIMTMQIGMSD
    Input image7600.199.830.460.820.115
    Image obtained by CLAHE2799.8915.750.760.830.087
    Image obtained by NPE[7]463.4422.060.850.870.034
    Image obtained by LIME[8]1885.2416.340.790.820.052
    Image obtained by LLCNN[14]463.4922.170.870.860.054
    Image obtained by Ma[15]417.7722.640.820.880.085
    Image obtained by our method146.5626.720.880.880.033
    Table 2. Quantitative comparison of synthetic low-light images obtained by different algorithms
    MethodIENIQELOESSEQ
    CLAHE7.598.081279.3615.64
    NPE[7]7.446.64997.3619.79
    LIME[8]7.558.24875.3313.50
    LLCNN[14]7.217.42805.7317.93
    Ma[15]7.277.06942.9714.84
    Ours7.566.29664.7611.06
    Table 3. Quantitative comparison of different algorithms on real low-light images
    Ruoyou Wu, Dexing Wang, Hongchun Yuan. Low-Light Image Enhancement Based on Attention Mechanism and Convolutional Neural Networks[J]. Laser & Optoelectronics Progress, 2020, 57(20): 201022
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