## 3 Results
### Improving Image Quality by Removing Compression Artifacts
\begin{table}
\begin{tabular}{c c c c c c c c c c} \hline \hline
**Method** & **Metric** & **QF = 10** & **QF = 20** & **QF = 30** & **QF = 40** & **QF = 50** & **QF = 60** & **QF = 70** & **QF = 80** & **QF = 90** \\ \hline \multirow{2}{*}{JPEG} & \(SSIM\) & 0.8259 & 0.8928 & 0.9195 & 0.9330 & 0.9422 & 0.9495 & 0.9571 & 0.9646 & 0.9728 \\  & \(PSNR\) & 29.76 & 33.05 & 34.82 & 35.98 & 36.86 & 37.67 & 38.65 & 39.83 & 41.41 \\ \hline \multirow{2}{*}{EPIIC} & \(SSIM\) & **0.8790** & 0.9213 & **0.9391** & **0.9483** & **0.9545** & **0.9595** & **0.9649** & **0.9701** & **0.9757** \\  & \(PSNR\) & 30.93 & 34.07 & 35.75 & 36.85 & 37.67 & 38.42 & 39.31 & 40.33 & 41.56 \\ \hline \multirow{2}{*}{EPIIC Sobel} & \(SSIM\) & 0.8790 & 0.9213 & 0.9390 & **0.9483** & **0.9545** & **0.9595** & **0.9649** & **0.9701** & **0.9757** \\  & \(PSNR\) & 30.93 & 34.08 & 35.76 & **36.86** & _37.67_ & **38.43** & **39.32** & **40.34** & **41.58** \\ \hline \multirow{2}{*}{FBCNN} & \(SSIM\) & **0.9029** & **0.9403** & **0.9546** & **0.9617** & **0.9664** & **0.9701** & **0.9739** & **0.9774** & **0.9814** \\  & \(PSNR\) & **32.52** & **35.44** & **36.94** & **37.86** & **38.55** & **39.13** & **39.84** & **0.64** & **41.67** \\ \hline \multirow{2}{*}{Gaussian Filter} & \(SSIM\) & 0.8786 & 0.9211 & 0.9390 & 0.9482 & 0.9544 & 0.9594 & 0.9648 & **0.9701** & 0.9756 \\  & \(PSNR\) & 30.91 & 34.05 & 35.74 & 36.83 & 37.66 & 38.41 & 39.30 & 40.31 & 41.54 \\ \hline \multirow{2}{*}{Guided Filter} & \(SSIM\) & 0.8784 & **0.9217** & 0.9384 & 0.9476 & 0.9536 & 0.9582 & 0.9628 & 0.9672 & 0.9715 \\  & \(PSNR\) & **30.94** & **34.12** & **35.77** & 36.85 & **37.68** & 38.39 & 39.22 & 40.13 & 41.18 \\ \hline \multirow{2}{*}{Average Filter} & \(SSIM\) & 0.8751 & 0.9205 & 0.9388 & 0.9477 & 0.9535 & 0.9579 & 0.9624 & 0.9667 & 0.9709 \\  & \(PSNR\) & 30.82 & 34.04 & 35.72 & 36.76 & 37.51 & 38.16 & 38.89 & 39.68 & 40.54 \\ \hline \multirow{2}{*}{Median Filter} & \(SSIM\) & 0.8611 & 0.9115 & 0.9328 & 0.9431 & 0.9499 & 0.9551 & 0.9604 & 0.9656 & 0.9709 \\  & \(PSNR\) & 30.57 & 33.70 & 35.42 & 36.52 & 37.32 & 38.02 & 38.84 & 39.76 & 40.85 \\ \hline \multirow{2}{*}{Wiener Filter} & \(SSIM\) & 0.8754 & 0.9193 & 0.9386 & 0.9479 & 0.9538 & 0.9585 & 0.9630 & 0.9674 & 0.9718 \\  & \(PSNR\) & 30.86 & 33.98 & 35.73 & 36.83 & 37.63 & 38.33 & 39.13 & 40.00 & 40.99 \\ \hline \multirow{2}{*}{Non-local Means Filter} & \(SSIM\) & 0.8259 & 0.8928 & 0.9195 & 0.9330 & 0.9422 & 0.9495 & 0.9571 & 0.9646 & 0.9729 \\  & \(PSNR\) & 29.76 & 33.05 & 34.82 & 35.98 & 36.86 & 37.67 & 38.65 & 39.83 & 41.41 \\ \hline \multirow{2}{*}{Median Modified Wiener Filter} & \(SSIM\) & 0.8596 & 0.9095 & 0.9322 & 0.9431 & 0.9501 & 0.9556 & 0.961 & 0.9663 & 0.9718 \\  & \(PSNR\) & 30.52 & 33.73 & 35.40 & 36.54 & 37.38 & 38.13 & 39.01 & 40.01 & 41.21 \\ \hline \multirow{2}{*}{Anisotropic Diffusion Filter} & \(SSIM\) & 0.8750 & 0.9216 & 0.9385 & 0.9466 & 0.9518 & 0.9558 & 0.9597 & 0.9635 & 0.9672 \\  & \(PSNR\) & 30.83 & 34.10 & 35.71 & 36.70 & 37.40 & 37.98 & 38.64 & 39.33 & 40.05 \\ \hline \multirow{2}{*}{Gaussian Bilateral Filter} & \(SSIM\) & 0.8259 & 0.8928 & 0.9195 & 0.9330 & 0.9422 & 0.9495 & 0.9571 & 0.9646 & 0.9728 \\  & \(PSNR\) & 29.76 & 33.05 & 34.82 & 35.98 & 36.86 & 37.67 & 38.65 & 39.83 & 41.41 \\ \hline \hline \end{tabular}
\end{table} 
Table 1: \(SSIM\) and \(PSNR\) scores for the BreCaHAD dataset. The **first**, the **second**, and the _third_ best results are highlighted. The best methods mentioned above were evaluated on other image datasets containing natural images. Again, the best results for most cases were achieved by the FBCNN neural network. The EPIIC, EPIIC Sobel, Gaussian Filter, and Guided filter algorithms also improved the average \(SS1M\) and \(PSNR\) scores for selected datasets for most of the tested \(QF\) values. The best results of each method are included in the Appendix A. The diagram presented in Figure 4 shows the average difference between the \(SSIM\) and \(PSNR\) values before and after removal of the blocking artifacts for the top four methods.