Research Article

Modified Discrete Grey Wolf Optimizer Algorithm for Multilevel Image Thresholding

Table 4

PSNR metrics of MTEMO, DE, ABC, GWO, and MDGWO.

ImageMTEMODEABCGWOMDGWO

Cameraman213.62612.58413.92014.27914.463
318.80317.58414.46219.69619.934
420.58620.11120.8120.80921.168
520.66121.28222.4022.40423.119

Lena214.6728.82314.59014.68014.716
317.24714.38617.19717.41617.514
418.25116.15118.55919.76220.173
520.01916.72020.32121.29921.820

Baboon216.0168.10316.00716.02416.035
316.01612.59618.59218.63218.634
418.48513.17818.41720.48020.519
520.50713.13520.22422.06022.092

Butterfly211.0658.70214.40214.76214.932
314.17613.02814.50417.87318.553
416.72513.02816.18921.02121.071
519.02614.78619.28621.48522.453

Maize213.63310.54913.59013.95014.040
315.22913.02215.29516.20116.585
416.28014.27016.34618.71318.981
517.21115.07917.04620.41020.879

Sea Star214.3988.61014.39514.80914.885
316.98714.07816.98117.43117.458
418.30416.19118.42719.42119.448
520.16516.47420.33020.88720.968

Smiling Girl213.42014.98613.51417.98918.003
318.25411.24318.06918.74219.114
418.86014.55618.82619.82320.075
519.84022.98019.76921.21421.793

Surfer211.7449.73711.87816.15416.434
318.58411.63818.76218.89518.934
419.47821.86619.64720.23420.721
520.46819.57620.47921.69921.896