private double[,] Extracted_pso_operation(double[,] hostcolor, double[,] wmcolor, double[,] vtWcolor, Bitmap pic, Bitmap WmPic, Bitmap vwPic, double[,] sWm)
{
svd_host = new svd_operation(pic, hostcolor);
svd_watermark = new svd_operation(WmPic, wmcolor);
svd_operation svd_ww = new svd_operation(vwPic, vtWcolor);
double[,] wmP = svd_ww.get_w();
double[,] hostP = svd_host.get_w();
double[,] newS = new double[WmPic.Width, WmPic.Height];
for (int i = 0; i < wmP.GetLength(0); i++)
{
for (int j = 0; j < wmP.GetLength(1); j++)
{
newS[i, j] = (wmP[i, j] - hostP[i, j]) / 0.0025;
}
}
double[,] wmU = svd_watermark.svd.U.ToArray();
double[,] wmVt = svd_watermark.svd.VT.ToArray();
double[,] recompo = new double[wmU.GetLength(0), wmU.GetLength(1)];
recompo = svd_watermark.perkalian_matrix(wmU, newS);
recompo = svd_watermark.perkalian_matrix(recompo, wmVt);
for (int i = 0; i < recompo.GetLength(0); i++)
{
for (int j = 0; j < recompo.GetLength(1); j++)
{
hostcolor[i, j] = recompo[i, j];
}
}
return(hostcolor);
}
private double[,] svd_pso_operation(double[,] hostcolor, double[,] wmcolor, Bitmap pic, Bitmap WmPic, double[,] vt, string color)
{
svd_host = new svd_operation(pic, hostcolor);
svd_watermark = new svd_operation(WmPic, wmcolor);
vt = svd_watermark.getP();
for (int i = 0; i < vt.GetLength(0); i++)
{
for (int j = 0; j < vt.GetLength(1); j++)
{
vt[i, j] *= 0.0025;
}
}
double[,] snew = new double[vt.GetLength(0), vt.GetLength(1)];
snew = svd_host.getnew_W(vt);
if (sWmRed == null)
{
sWmRed = new double[snew.GetLength(0), snew.GetLength(1)];
}
if (swGreen == null)
{
swGreen = new double[snew.GetLength(0), snew.GetLength(1)];
}
if (swBlue == null)
{
swBlue = new double[snew.GetLength(0), snew.GetLength(1)];
}
for (int i = 0; i < snew.GetLength(0); i++)
{
for (int j = 0; j < snew.GetLength(1); j++)
{
if (color.Equals("red"))
{
sWmRed[i, j] = snew[i, j];
}
else if (color.Equals("green"))
{
swGreen[i, j] = snew[i, j];
}
else if (color.Equals("blue"))
{
swBlue[i, j] = snew[i, j];
}
}
}
double[,] host_u = svd_host.svd.U.ToArray();
double[,] host_vt = svd_host.svd.VT.ToArray();
double[,] host_w = svd_host.get_w();
double[,] recompo = new double[host_u.GetLength(0), host_u.GetLength(1)];
recompo = svd_host.perkalian_matrix(host_u, snew);
recompo = svd_host.perkalian_matrix(recompo, host_vt);
for (int i = 0; i < recompo.GetLength(0); i++)
{
for (int j = 0; j < recompo.GetLength(1); j++)
{
hostcolor[i, j] = recompo[i, j];
}
}
return(hostcolor);
}