Constructing HVS-Based Optimal Substitution Matrix Using Enhanced Differential Evolution

<table class="table-group" width="800px"><tr class="fig-image" id="a"><td><img alt="824239.fig.004a" src="https://static.hindawi.com/articles/mpe/volume-2013/824239/figures/824239.fig.004a.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(a) </b>Secret image</td></tr></table></td></tr><tr class="fig-image" id="b"><td><img alt="824239.fig.004b" src="https://static.hindawi.com/articles/mpe/volume-2013/824239/figures/824239.fig.004b.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(b) </b>Sailboat</td></tr></table></td></tr><tr class="fig-image" id="c"><td><img alt="824239.fig.004c" src="https://static.hindawi.com/articles/mpe/volume-2013/824239/figures/824239.fig.004c.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(c) </b>Boat</td></tr></table></td></tr><tr class="fig-image" id="d"><td><img alt="824239.fig.004d" src="https://static.hindawi.com/articles/mpe/volume-2013/824239/figures/824239.fig.004d.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(d) </b>Pepper</td></tr></table></td></tr><tr class="fig-image" id="e"><td><img alt="824239.fig.004e" src="https://static.hindawi.com/articles/mpe/volume-2013/824239/figures/824239.fig.004e.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(e) </b>Bridge</td></tr></table></td></tr><tr class="fig-image" id="f"><td><img alt="824239.fig.004f" src="https://static.hindawi.com/articles/mpe/volume-2013/824239/figures/824239.fig.004f.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(f) </b>Gold</td></tr></table></td></tr></table>

Mathematical Problems in Engineering

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Figure 4

Figure 4: Constructing HVS-Based Optimal Substitution Matrix Using Enhanced Differential Evolution 