/// <summary>
/// Inverse application of the algorithm
/// </summary>
/// <param name="parCompressedImage">Compressed image stream</param>
/// <param name="parArguments">List of an arguments (ImageFormat finalFormat)</param>
/// <returns>Decompressed image stream</returns>
public override Stream DecompressImage(Stream parCompressedImage, List <object> parArguments)
{
GZIP gzip = GZIP.GetInstance();
Stream decompressedWavelet = gzip.DecompressImage(parCompressedImage, new List <object>());
Bitmap wavelet = new Bitmap(decompressedWavelet);
int levels = (int)parArguments[0];
HaarWavelet.ApplyTransform(ref wavelet, false, levels);
Stream result = new MemoryStream();
ImageFormat format = (ImageFormat)parArguments[1];
wavelet.Save(result, format);
return(result);
}
/// <summary>
/// Forward application of the algorithm
/// </summary>
/// <param name="parOriginalImage">Original image stream</param>
/// <param name="parArguments">List of an arguments (long qualityLevel, ImageFormat interimFormat)</param>
/// <returns>Compressed image stream</returns>
public override Stream CompressImage(Stream parOriginalImage, List <object> parArguments)
{
Bitmap original = new Bitmap(parOriginalImage);
int levels = (int)parArguments[0];
HaarWavelet.ApplyTransform(ref original, true, levels);
Stream waveletStream = new MemoryStream();
ImageFormat format = (ImageFormat)parArguments[2];
original.Save(waveletStream, format);
GZIP gzip = GZIP.GetInstance();
int compressionLevel = (int)parArguments[1];
Stream compressedImage = gzip.CompressImage(waveletStream, new List <object>()
{
compressionLevel
});
return(compressedImage);
}
