private static void Decode(string input, string output)
{
var signedImage = new Bitmap(Image.FromFile(input));
var codec = new LangelaarCodec(signedImage, new Size(8, 8), 10);
var buffers = new List <byte[]>();
for (var i = 0; i < 8; i++)
{
var b = new byte[2000];
codec.Read(b, 0, b.Length);
buffers.Add(b);
}
var buffer = BitHelper.Merge(buffers);
Bitmap oldHash;
using (var ms = new MemoryStream(buffer))
{
oldHash = new Bitmap(Image.FromStream(ms));
}
var newHash = ImageHelper.Hash(signedImage, new Size(100, 100));
var validated = ImageHelper.Validate(signedImage, oldHash, newHash);
validated.SaveJpeg(output, 100);
}
private static void Decode(string input, string output, Rectangle rect)
{
var encodedImage = new Bitmap(Image.FromFile(input));
var codec = new LangelaarCodec(encodedImage, new Size(8, 8), 10);
var subImage = Image.FromStream(codec);
using (var g = Graphics.FromImage(encodedImage))
{
g.DrawImage(subImage, rect);
}
encodedImage.SaveJpeg(output, 100);
}
private static void Encode(string input, string output, Rectangle rect)
{
var originalImage = new Bitmap(Image.FromFile(input));
var subImage = originalImage.Clone(rect, originalImage.PixelFormat);
using (var g = Graphics.FromImage(originalImage))
{
g.FillRectangle(new SolidBrush(Color.Black), rect);
}
var codec = new LangelaarCodec(originalImage, new Size(8, 8), 10);
subImage.SaveJpeg(codec, 10);
Console.WriteLine($"Used {codec.Position} of {codec.Length}");
originalImage.SaveJpeg(output, 100);
}
private static void Encode(string input, string output)
{
var originalImage = new Bitmap(Image.FromFile(input));
var hash = ImageHelper.Hash(originalImage, new Size(100, 100));
var codec = new LangelaarCodec(originalImage, new Size(8, 8), 10);
byte[] buffer;
using (var ms = new MemoryStream())
{
ms.SetLength(2000);
hash.Save(ms, ImageFormat.Png);
buffer = ms.GetBuffer();
}
for (var i = 0; i < 8; i++)
{
codec.Write(buffer, 0, buffer.Length);
}
originalImage.SaveJpeg(output, 100);
}
