15 citations · 38 across the 11 of their papers we have counts for
3 papers · 2 filters
GA based robust blind digital watermarking
Víctor Álvarez, José-Andrés Armario, María-Dolores Frau +4
A genetic algorithm based robust blind digital watermarking scheme is presented. Starting from a binary image (the original watermark), a genetic algorithm is performed searching f…
Embedding cocyclic D-optimal designs in cocyclic Hadamard matrices
Víctor Álvarez, José-Andrés Armario, María-Dolores Frau +1
In this paper a method for embedding cocyclic submatrices with ``large'' determinants of orders 2t in certain cocyclic Hadamard matrices of orders 4t is described (t an odd integer…
Searching for partial Hadamard matrices
Víctor Álvarez, José-Andrés Armario, María-Dolores Frau +4
Three algorithms looking for pretty large partial Hadamard matrices are described. Here "large" means that hopefully about a third of a Hadamard matrix (which is the best asymptoti…