public static void TestDCT_Quantize()
{
Dct dct = new Dct();
print("DCT Test");
var d = dct.Go(testdata);
print("Quantized dct");
Quantizer.QuantizeLuminance(ref d);
d.PrintArray();
print("Quantized Inverse");
Quantizer.InverseQuantizeLuminance(ref d);
print("Dct Inverse");
dct.GoBack(d).PrintArray();
}
public static void TestWhole()
{
// down sample
List <List <double> > data = new List <List <double> >();
for (int i = 0; i < bigtestdata.GetLength(0); i++)
{
if (i % 2 != 0)
{
continue;
}
List <double> row = new List <double>();
for (int j = 0; j < bigtestdata.GetLength(1); j++)
{
if (j % 2 != 0)
{
continue;
}
row.Add(bigtestdata[i, j]);
}
data.Add(row);
}
double[,] narr = new double[8, 8];
for (int i = 0; i < data.Count; i++)
{
for (int j = 0; j < data[i].Count; j++)
{
narr[i, j] = data[i][j];
}
}
print("Down Sampled");
narr.PrintArray();
Dct dct = new Dct();
var dctdata = dct.Go(narr);
print("dct go");
dctdata.PrintArray();
Quantizer.QuantizeLuminance(ref dctdata);
print("quantized");
dctdata.PrintArray();
var zagged = ZigZag.Run(dctdata);
var bzagged = zagged.Select(x => (sbyte)x).ToArray();
List <sbyte[]> zaglist = new List <sbyte[]>()
{
bzagged
};
sbyte[] rled = Rle.BetterEncode(zaglist);
// reversing
var unrle = Rle.DecodeRle(rled);
var unzag = ZigZag.Inverse(unrle[0].Select(x => (int)x).ToArray());
Quantizer.InverseQuantizeLuminance(ref unzag);
var idct = dct.GoBack(unzag);
idct.PrintArray();
}