private IDataMatrix<ushort> EncodeFeatureValues(IDataMatrix<float> dataMatrix, CodeBook codeBook, int cThreads, bool fSparse)
{
//construct the matrix builder given if we want to have dense or sparse representations or not
IDataMatrixBuilderRam<ushort> dataMatrixBuilderRam;
if (fSparse)
{
dataMatrixBuilderRam = new DataMatrixBuilderRamSparse<ushort>(dataMatrix.NumRows, dataMatrix.NumCols, 0);
}
else
{
dataMatrixBuilderRam = new DataMatrixBuilderRamDense<ushort>(dataMatrix.NumRows, dataMatrix.NumCols);
}
MatrixEncoder matrixEncoder = new MatrixEncoder(dataMatrix, codeBook, dataMatrixBuilderRam);
ProcessorMT processorMT = new ProcessorMT(matrixEncoder, cThreads);
#if QUANTIZER_TIMER
System.Diagnostics.Stopwatch timer = new System.Diagnostics.Stopwatch();
#if VERBOSE
Console.WriteLine("Starting encoding timer...");
#endif
timer.Start();
#endif
processorMT.Process();
#if QUANTIZER_TIMER
timer.Stop();
#if VERBOSE
Console.WriteLine("Total encoding time: {0} seconds", 0.001 * timer.ElapsedMilliseconds);
#endif
#endif
return matrixEncoder.CodedMatrix;
}
private CodeBook ComputeCodeBook(IDataMatrix<float> dataMatrix, int cThreads)
{
//perform quantization
MatrixQuantizer matrixQuantizer = new MatrixQuantizer(dataMatrix);
ProcessorMT processorMT = new ProcessorMT(matrixQuantizer, cThreads);
#if QUANTIZER_TIMER
System.Diagnostics.Stopwatch timer = new System.Diagnostics.Stopwatch();
#if VERBOSE
Console.WriteLine("Starting codebook timer...");
#endif
timer.Start();
#endif
processorMT.Process();
#if QUANTIZER_TIMER
timer.Stop();
#if VERBOSE
Console.WriteLine("Total Codebook calculation time: {0} seconds", 0.001 * timer.ElapsedMilliseconds);
#endif
#endif
//code book
return matrixQuantizer.codeBook;
}