private void Decompress()
{
Bitmap comprBitmap;
if (VQCompression)
{
comprBitmap = VqDecompress();
}
else
{
_decompressStopWath = new Stopwatch();
_decompressStopWath.Start();
var comprImg = (DwtImage)_compressed;
var deflate = new DeflateStream(new MemoryStream(_compressedData), CompressionMode.Decompress);
var comprStream = new MemoryStream();
deflate.CopyTo(comprStream);
_compressedData = comprStream.ToArray();
_compressedData = HuffmanEncoder.Decode(_compressedData);
comprImg.FromByteArray(_compressedData);
var img = RLE.DecompressImage(comprImg.Image, comprImg.Width, comprImg.Height);
comprBitmap = ApplyHaarTransform(false, false, CodeBookSizePow, img);
_decompressStopWath.Stop();
}
var stream = new MemoryStream();
comprBitmap.Save(stream, ImageFormat.Png);
ResultImage.BeginInit();
ResultImage.StreamSource = stream;
ResultImage.EndInit();
OnPropertyChanged("ResultImage");
}
private Bitmap VqDecompress()
{
_decompressStopWath = new Stopwatch();
_decompressStopWath.Start();
var deflate = new DeflateStream(new MemoryStream(_compressedData), CompressionMode.Decompress);
var comprStream = new MemoryStream();
deflate.CopyTo(comprStream);
_compressedData = comprStream.ToArray();
_compressedData = HuffmanEncoder.Decode(_compressedData);
_compressed.FromByteArray(_compressedData);
var comprBitmap = new Bitmap(_compressed.Width, _compressed.Height);
var comprImg = (VqImage)_compressed;
var img = RLE.Decompress(comprImg.Image);
var k = 0;
for (int i = 0; i < comprBitmap.Width; i++)
{
for (int j = 0; j < comprBitmap.Height; j++)
{
var pos = img[k];
comprBitmap.SetPixel(i, j,
Color.FromArgb(comprImg.CodeBook[pos][0], comprImg.CodeBook[pos][2],
comprImg.CodeBook[pos][1]));
k++;
}
}
_decompressStopWath.Stop();
return(comprBitmap);
}
private void Compress()
{
if (VQCompression)
{
VqCompress();
}
else
{
_compressStopWath = new Stopwatch();
_fileName = _openDialog.FileName;
OnPropertyChanged("SourceImage");
var bitmap = new Bitmap(_fileName);
_compressStopWath.Start();
bitmap = ApplyHaarTransform(true, false, CodeBookSizePow, bitmap);
var rle = new RLE(bitmap);
var imgCompr = new DwtImage {
Height = bitmap.Height, Width = bitmap.Width, Image = rle.CompressImage()
};
_compressedData = imgCompr.ToByteArray();
_compressedData = HuffmanEncoder.Encode(_compressedData);
byte[] result;
using (var resultStream = new MemoryStream())
{
using (var compressionStream = new DeflateStream(resultStream, CompressionLevel.Optimal))
{
compressionStream.Write(_compressedData, 0, _compressedData.Length);
}
result = resultStream.ToArray();
}
_compressedData = result;
_compressStopWath.Stop();
_compressed = imgCompr;
}
Wind.Dispatcher.Invoke(Decompress);
Wind.Dispatcher.Invoke(SetResults);
}
private void VqCompress()
{
_compressStopWath = new Stopwatch();
_fileName = _openDialog.FileName;
OnPropertyChanged("SourceImage");
var bitmap = new Bitmap(_fileName);
var k = 0;
var colors = new List<Color>();
for (int i = 0; i < bitmap.Width; i++)
{
for (int j = 0; j < bitmap.Height; j++)
{
var color = bitmap.GetPixel(i, j);
colors.Add(color);
k++;
}
}
var image = colors.GroupBy(x => x).AsParallel()
.Select(x => new[] { (double)x.Key.R, (double)x.Key.B, (double)x.Key.G })
.AsParallel()
.ToArray();
_vq = new VectorQuantization(image, 3, (int)Math.Pow(2, CodeBookSizePow));
_compressed = new VqImage
{
Height = bitmap.Height,
Width = bitmap.Width,
CodeBook =
_vq.CodeBook.Select(
x =>
new[]
{
(byte) Math.Round(x[0]), (byte) Math.Round(x[1]), (byte) Math.Round(x[2])
}).ToArray()
};
k = 0;
var img = new byte[bitmap.Width * bitmap.Height];
for (int i = 0; i < bitmap.Width; i++)
{
for (int j = 0; j < bitmap.Height; j++)
{
var color = bitmap.GetPixel(i, j);
var pos = _vq.QuantazationIndex(new[] { (double)color.R, color.B, color.G });
img[k] = (byte)pos;
k++;
}
}
var rle = new RLE(img);
var imgCompr = ((VqImage) _compressed);
imgCompr.Image = rle.Compress();
_compressedData = imgCompr.ToByteArray();
_compressedData = HuffmanEncoder.Encode(_compressedData);
byte[] result;
using (var resultStream = new MemoryStream())
{
using (var compressionStream = new DeflateStream(resultStream, CompressionLevel.Optimal))
{
compressionStream.Write(_compressedData, 0, _compressedData.Length);
}
result = resultStream.ToArray();
}
_compressedData = result;
_compressStopWath.Stop();
}
private void Compress()
{
if(VQCompression) VqCompress();
else
{
_compressStopWath = new Stopwatch();
_fileName = _openDialog.FileName;
OnPropertyChanged("SourceImage");
var bitmap = new Bitmap(_fileName);
_compressStopWath.Start();
bitmap = ApplyHaarTransform(true, false, CodeBookSizePow, bitmap);
var rle = new RLE(bitmap);
var imgCompr = new DwtImage {Height = bitmap.Height, Width = bitmap.Width, Image = rle.CompressImage()};
_compressedData = imgCompr.ToByteArray();
_compressedData = HuffmanEncoder.Encode(_compressedData);
byte[] result;
using (var resultStream = new MemoryStream())
{
using (var compressionStream = new DeflateStream(resultStream, CompressionLevel.Optimal))
{
compressionStream.Write(_compressedData, 0, _compressedData.Length);
}
result = resultStream.ToArray();
}
_compressedData = result;
_compressStopWath.Stop();
_compressed = imgCompr;
}
Wind.Dispatcher.Invoke(Decompress);
Wind.Dispatcher.Invoke(SetResults);
}
private void VqCompress()
{
_compressStopWath = new Stopwatch();
_fileName = _openDialog.FileName;
OnPropertyChanged("SourceImage");
var bitmap = new Bitmap(_fileName);
var k = 0;
var colors = new List <Color>();
for (int i = 0; i < bitmap.Width; i++)
{
for (int j = 0; j < bitmap.Height; j++)
{
var color = bitmap.GetPixel(i, j);
colors.Add(color);
k++;
}
}
var image = colors.GroupBy(x => x).AsParallel()
.Select(x => new[] { (double)x.Key.R, (double)x.Key.B, (double)x.Key.G })
.AsParallel()
.ToArray();
_vq = new VectorQuantization(image, 3, (int)Math.Pow(2, CodeBookSizePow));
_compressed = new VqImage
{
Height = bitmap.Height,
Width = bitmap.Width,
CodeBook =
_vq.CodeBook.Select(
x =>
new[]
{
(byte)Math.Round(x[0]), (byte)Math.Round(x[1]), (byte)Math.Round(x[2])
}).ToArray()
};
k = 0;
var img = new byte[bitmap.Width * bitmap.Height];
for (int i = 0; i < bitmap.Width; i++)
{
for (int j = 0; j < bitmap.Height; j++)
{
var color = bitmap.GetPixel(i, j);
var pos = _vq.QuantazationIndex(new[] { (double)color.R, color.B, color.G });
img[k] = (byte)pos;
k++;
}
}
var rle = new RLE(img);
var imgCompr = ((VqImage)_compressed);
imgCompr.Image = rle.Compress();
_compressedData = imgCompr.ToByteArray();
_compressedData = HuffmanEncoder.Encode(_compressedData);
byte[] result;
using (var resultStream = new MemoryStream())
{
using (var compressionStream = new DeflateStream(resultStream, CompressionLevel.Optimal))
{
compressionStream.Write(_compressedData, 0, _compressedData.Length);
}
result = resultStream.ToArray();
}
_compressedData = result;
_compressStopWath.Stop();
}
