public static Bitmap EmbedImage(string visibleImageFilename, string hiddenImageFilename)
{
Bitmap visibleImage = new Bitmap(visibleImageFilename);
Bitmap hiddenImage = new Bitmap(hiddenImageFilename);
// TODO: don't need to resize to a half if hidden image is less than a half
hiddenImage = ImageResizer.CropAndResizeBitmap(visibleImage.Size, hiddenImage, 0.5);
Bitmap stegImage = new Bitmap(visibleImage.Width, visibleImage.Height);
PixelMapper pixelMapper = new PixelMapper(visibleImage.Size, hiddenImage.Size);
foreach (PixelMap pm in pixelMapper.GetHiddenToVisiblePixelMapEnumerator())
{
foreach (PixelBitsMap pbm in pm.VisibleImagePoints)
{
BitArray r = copyChannel(visibleImage, hiddenImage, pm.HiddenImagePoint, pbm, Channel.R);
BitArray g = copyChannel(visibleImage, hiddenImage, pm.HiddenImagePoint, pbm, Channel.G);
BitArray b = copyChannel(visibleImage, hiddenImage, pm.HiddenImagePoint, pbm, Channel.B);
Color pixelColor = Color.FromArgb(r.ToInt(), g.ToInt(), b.ToInt());
stegImage.SetPixel(pbm.Point.X, pbm.Point.Y, pixelColor);
}
}
return(stegImage);
}
