• Infrared and Laser Engineering
  • Vol. 50, Issue 6, 20200426 (2021)
Ronghua Li, Zhichao Tang, Junfeng Piao, and Hongliang Li
Author Affiliations
  • School of Mechanical Engineering, Dalian Jiaotong University, Dalian 116028, China
  • show less
    DOI: 10.3788/IRLA20200426 Cite this Article
    Ronghua Li, Zhichao Tang, Junfeng Piao, Hongliang Li. Underwater degraded image–sharpening method based on optimal polarization parameter reconstruction[J]. Infrared and Laser Engineering, 2021, 50(6): 20200426 Copy Citation Text show less
    Underwater polarization imaging
    Fig. 1. Underwater polarization imaging
    Polarization detector
    Fig. 2. Polarization detector
    Flow chart of the system program
    Fig. 3. Flow chart of the system program
    Schematic of experimental devices for polarization image
    Fig. 4. Schematic of experimental devices for polarization image
    Polarization image obtained by single channel detector
    Fig. 5. Polarization image obtained by single channel detector
    Image restoration under high concentration
    Fig. 6. Image restoration under high concentration
    Image restoration under low concentration
    Fig. 7. Image restoration under low concentration
    Recovered image under different concentration
    Fig. 8. Recovered image under different concentration
    Fig.6(a)Fig.6(b)Fig.6(c)Fig.6(d)Fig.6(e)
    Information entropy5.45054.94135.51116.62617.2706
    Average gradient0.54070.25941.16390.88522.9033
    Gray variance10.18877.62858.388622.253034.2354
    Table 1. Comparison results of high density image restoration algorithms
    Fig.7(a)Fig.7(b)Fig.7(c)Fig.7(d)Fig.7(e)
    Information entropy6.21145.79785.48285.01017.4050
    Average gradient0.82620.45691.25060.32381.4287
    Gray variance20.303914.691018.343410.331149.0291
    Table 2. Comparison results of low density image restoration algorithms
    Ronghua Li, Zhichao Tang, Junfeng Piao, Hongliang Li. Underwater degraded image–sharpening method based on optimal polarization parameter reconstruction[J]. Infrared and Laser Engineering, 2021, 50(6): 20200426
    Download Citation