Table 2: Common image quality metrics.

NumberImage quality measurementEquation

1Mean square error (MSE)
2Root mean square error (RMSE)
3Peak signal-to-noise ratio (PSNR)
4Universal image quality index (IQI)
5Measure of enhancement (EME)
6Pearson correlation coefficient (PCC)
7Signal-to-signal noise ratio (SNR)
8Mean absolute error (MAE)
9Structural similarity (SSIM)
10Weight peak signal-to-noise ratio (WPSNR)
11Normalized Hamming distance (NHD)
12Bit error rate (BER)