Fig. 11

Compute \( {m}_i=\sum \limits_{k=1}^5\left({x}_k\right)\left(i,j\right),\kern0.75em x\in X,\kern0.75em \left(i,j\right)\in \left(I\times I\right) \) and compute \( {r}_i=\sum \limits_{j=1}^9\ \left({m}_i-{m}_j\right)\kern0.75em \left(i=1,2,3,4,5\right) \). The maximal value of ℂ_M to state the optimal alternative for the suitability of S-box to image encryption based on 3-polar fuzzy soft set. (2) Second way:

Compute \( {m}_i=\sum \limits_{k=1}^5\left({x}_k\right)\left(i,j\right),\kern0.75em x\in X,\kern0.75em \left(i,j\right)\in \left(I\times I\right) \) and compute \( {r}_i=\sum \limits_{j=1}^9\ \left({m}_i-{m}_j\right)\kern0.75em \left(i=1,2,3,4,5\right) \)