public override Bitmap RecoverWatermark(Bitmap watermarkedImage)
{
var coverData = ImageUtility.ConvertToMatrix(_coverImage);
var watermarkData = ImageUtility.ConvertToMatrix(_watermark);
var watermarkedData = ImageUtility.ConvertToMatrix(watermarkedImage);
Action red = () => RecoverChannel(coverData.R, watermarkedData.R, watermarkData.R);
Action green = () => RecoverChannel(coverData.G, watermarkedData.G, watermarkData.G);
Action blue = () => RecoverChannel(coverData.B, watermarkedData.B, watermarkData.B);
Parallel.Invoke(red, green, blue);
var avgGray = new double[watermarkData.Width, watermarkData.Height];
for (int i = 0; i < watermarkData.Width; i++)
{
for (int j = 0; j < watermarkData.Height; j++)
{
avgGray[i, j] = (1 * watermarkData.R[i, j] + 1 * watermarkData.G[i, j] + 1 * watermarkData.B[i, j]) / 3;
}
}
watermarkData = new RgbData(avgGray);
var recoveredWatermark = ImageUtility.ConvertToBitmap(watermarkData);
return(recoveredWatermark);
}
public static Bitmap ConvertToBitmap(RgbData data)
{
Bitmap bmp = new Bitmap(data.Width, data.Height);
double[,] Red = ScalePixels(data.R);
double[,] Green = ScalePixels(data.G);
double[,] Blue = ScalePixels(data.B);
for (int i = 0; i < data.Width; i++)
{
for (int j = 0; j < data.Height; j++)
{
Color c = Color.FromArgb((int)Red[i, j], (int)Green[i, j], (int)Blue[i, j]);
bmp.SetPixel(i, j, c);
}
}
return(bmp);
}
