Constructing HVS-Based Optimal Substitution Matrix Using Enhanced Differential Evolution

Algorithm 1

The proposed embedding algorithm.

Algorithm ModEmbedding (𝐻,𝐸^∗)

   𝐷←Ø

  for each pixel 𝑝∈𝐻 and each k-bit element 𝑒∈𝐸^∗

  𝑞←𝑝/2^𝑘

  𝑟←𝑝 mod 2^𝑘

  𝑎^∗←arg_{{}𝑎∈−1,0.1}min𝑎×2^𝑘+𝑟−𝑒

  𝑝^′←(𝑞+𝑎^∗)×2^𝑘+𝑒

  𝐷←𝐷∪𝑝^′

  return 𝐷