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Table 4 Objective performance evaluation using PSNR and SSIM values with σ=20

From: Low-light image restoration using bright channel prior-based variational Retinex model

  [2] [3] [8] [23] [14] [16] Proposed
  PSNR SSIM PSNR SSIM PSNR SSIM PSNR SSIM PSNR SSIM PSNR SSIM PSNR SSIM
Figure 4 a 11.23 0.329 12.35 0.385 10.36 0.217 15.94 0.651 12.50 0.429 12.67 0.441 21.75 0.880
Figure 4 b 11.94 0.333 13.23 0.398 10.23 0.289 15.67 0.549 13.20 0.409 12.78 0.392 20.15 0.797
Figure 4 c 11.59 0.254 13.03 0.300 10.15 0.257 15.61 0.418 13.23 0.300 12.61 0.296 19.69 0.630
Figure 4 d 12.11 0.436 12.93 0.481 10.93 0.361 15.67 0.637 12.62 0.464 13.09 0.500 20.71 0.844
Figure 4 e 12.28 0.351 13.22 0.379 11.86 0.369 14.81 0.431 12.43 0.316 12.74 0.373 20.13 0.713
Figure 4 f 11.58 0.225 13.07 0.280 10.95 0.202 15.84 0.410 13.10 0.276 12.65 0.269 20.98 0.692
  1. The italicized number represents the highest value among the set of test methods