## 3 Results and Discussion
\begin{table}
\begin{tabular}{c c c c c c} \hline \hline
**ROI** & **PSNR Original** & **PSNR Fractal** & **PSNR CLAHE** & **PSNR Atrous** & **PSNR Haar** \\ \hline Mammogram1 & 14.9520375 & 26.0173658 & 5.29331434 & 19.1798131 & 28.3784897 \\ Mammogram2 & 10.3780269 & 25.7073607 & 3.75265808 & 9.82987038 & 8.113002 \\ Mammogram3 & 6.2968653 & 17.1834711 & 2.74185551 & 7.55762459 & 9.03115773 \\ Mammogram4 & 12.531327 & 19.8738643 & 4.56125727 & 13.7681427 & 20.5082699 \\ Mammogram5 & 5.02124095 & 21.8352635 & 3.34005048 & 4.58755005 & 5.8595959 \\ Mammogram6 & 7.39672241 & 12.8427779 & 3.22695738 & 7.38436646 & 13.7693594 \\ Mammogram7 & 6.57004815 & 21.9250510 & 3.07412349 & 8.04142869 & 6.91677123 \\ Mammogram8 & 6.39077642 & 18.7973014 & 2.82520137 & 6.0909552 & 10.0848015 \\ Mammogram9 & 9.13698222 & 31.4672378 & 4.64409266 & 11.7880713 & 16.5602278 \\ Mammogram10 & 8.61808019 & 14.7112292 & 3.25784414 & 11.5992335 & 29.5477321 \\ Mammogram11 & 7.57780888 & 34.0763958 & 2.9028926 & 6.91335505 & 8.87043705 \\ Mammogram12 & 4.89290219 & 13.1691046 & 2.36540812 & 5.1120106 & 7.4325419 \\ Mammogram13 & 4.84325384 & 30.2829792 & 3.14601435 & 7.74845119 & 50.0889064 \\ Mammogram14 & 6.12435205 & 25.5351583 & 2.35412286 & 4.75589499 & 11.180581 \\ Mammogram15 & 4.6581734 & 8.83677307 & 2.4930723 & 5.90852575 & 11.0134513 \\ Mammogram16 & 8.18221154 & 10.0063355 & 3.43123805 & 9.03891051 & 0.2717053 \\ Mammogram17 & 5.28929 & 18.080768 & 2.77471237 & 4.6410416 & 21.225357 \\ Mammogram18 & 10.9771912 & 27.0783787 & 3.59516952 & 14.4752557 & 16.5651798 \\ Mammogram19 & 2.98289168 & 14.2268846 & 2.2561202 & 2.47962232 & 10.8961836 \\ Mammogram20 & 5.23672425 & 13.0167117 & 2.13761694 & 6.33414072 & 6.64206507 \\ Mammogram21 & 7.962661649 & 19.1265475 & 3.63517605 & 9.917016164 & 28.8666667 \\ Mammogram22 & 6.07544615 & 26.030846 & 2.62601951 & 6.32458276 & 14.6507345 \\ Mammogram23 & 3.44512195 & 13.6106648 & 1.89943456 & 5.28660093 & 8.60732738 \\ Mammogram24 & 3.70408645 & 16.7877909 & 2.06785039 & 5.77580242 & 8.76845222 \\ Mammogram25 & 4.06758289 & 10.116543 & 2.05662157 & 5.89074025 & 1.7334873 \\ Mammogram26 & 2.71627173 & 8.5 & 1.96199084 & 5.04315432 & 4.74570783 \\ Mammogram27 & 6.0246116 & 17.6884346 & 3.1371602 & 7.05380693 & 7.44753125 \\ Mammogram28 & 4.1505851 & 18.3424969 & 2.21777943 & 3.14137946 & 10.2381395 \\ Mammogram29 & 9.23976876 & 18.5481108 & 2.96087432 & 6.22028179 & 9.17295229 \\ Mammogram30 & 10.2501316 & 17.795401 & 3.8837785 & 13.3533498 & 14.1378149 \\ Mammogram31 & 5.05765431 & 11.6534946 & 2.56873638 & 11.6788344 & 7.8616893 \\ Mammogram32 & 11.3763816 & 27.0865679 & 3.97316532 & 15.7074364 & 13.3525884 \\ Mammogram33 & 9.23906741 & 28.088304 & 3.50745082 & 17.0012467 & 20.5801554 \\ Mammogram34 & 13.2308365 & 27.5411554 & 3.83210849 & 14.1484887 & 17.3376225 \\ Mammogram35 & 11.1090101 & 15.000136 & 3.7831803 & 15.1415094 & 18.3323799 \\ Mammogram36 & 4.0641894 & 15.29422129 & 2.09897274 & 6.4998754 & 5.28183644 \\ Mammogram37 & 3.71631451 & 0.00761101 & 2.01044365 & 4.7762951 & 6.33515326 \\ Mammogram38 & 4.67/2777 & 15.3555181 & 3.19396062 & 11.467325 & 7.46167068 \\ Mammogram39 & 12.2380422 & 23.4266447 & 5.00444973 & 17.1568245 & 16.6131838 \\ Mammogram40 & 3.47104752 & 15.1217554 & 2.3643739 & 5.45404851 & 5.07032952 \\ Mean & 6.92460218 & 18.7448156 & 3.07386053 & 8.85615834 & 13.0874717 \\ \hline \hline \end{tabular}
\end{table} 
Table 3: Peak signal-to-noise ratio (PSNR) index evaluation. The results of Tables 3 and 4 confirm that the approach proposed herein produces a very good enhancement of the microcalcification region over the surrounding tissue, which would thus help radiologists in their visual discriminations.