private int method5(List <double[][]>[] rgbList, int chr)
{
List <double> subDiff = new List <double>();
List <double[][]> MR, MG, MB;
List <double[][]> SR, SG, SB;
int listSize = rgbList[0].Count;
int windowSize = Math.Min(Global.maxWidth, listSize);
int result = 0;
int minWidth = 40;
switch (chr)
{
case 0:
// 4:4:4
for (int i = minWidth; i < windowSize; i++)
{
MR = rgbList[0].Take(listSize - i).ToList();
MG = rgbList[1].Take(listSize - i).ToList();
MB = rgbList[2].Take(listSize - i).ToList();
SR = rgbList[0].Skip(i).ToList();
SG = rgbList[1].Skip(i).ToList();
SB = rgbList[2].Skip(i).ToList();
subDiff.Add(UBDiffSum(MR, MG, MB, SR, SG, SB));
MR.Clear();
MG.Clear();
MB.Clear();
SR.Clear();
SG.Clear();
SB.Clear();
}
result = subDiff.IndexOf(subDiff.Min()) + minWidth;
break;
case 1:
// 4:4:0
for (int i = minWidth; i < windowSize; i++)
{
MR = rgbList[0].Where((item, index) => index % 2 != 0).Take(listSize / 2 - i).ToList();
MG = rgbList[1].Where((item, index) => index % 2 != 0).Take(listSize / 2 - i).ToList();
MB = rgbList[2].Where((item, index) => index % 2 != 0).Take(listSize / 2 - i).ToList();
SR = rgbList[0].Skip(2 * i).Where((item, index) => index % 2 == 0).ToList();
SG = rgbList[1].Skip(2 * i).Where((item, index) => index % 2 == 0).ToList();
SB = rgbList[2].Skip(2 * i).Where((item, index) => index % 2 == 0).ToList();
subDiff.Add(UBDiffSum(MR, MG, MB, SR, SG, SB));
MR.Clear();
MG.Clear();
MB.Clear();
SR.Clear();
SG.Clear();
SB.Clear();
}
result = subDiff.IndexOf(subDiff.Min()) + minWidth;
break;
case 2:
// 4:2:2
for (int i = minWidth; i < windowSize; i += 2)
{
MR = rgbList[0].Take(listSize - i).ToList();
MG = rgbList[1].Take(listSize - i).ToList();
MB = rgbList[2].Take(listSize - i).ToList();
SR = rgbList[0].Skip(i).ToList();
SG = rgbList[1].Skip(i).ToList();
SB = rgbList[2].Skip(i).ToList();
subDiff.Add(UBDiffSum(MR, MG, MB, SR, SG, SB));
MR.Clear();
MG.Clear();
MB.Clear();
SR.Clear();
SG.Clear();
SB.Clear();
}
result = subDiff.IndexOf(subDiff.Min()) + minWidth / 2;
break;
case 3:
//4:2:0
for (int i = minWidth; i < windowSize; i += 2)
{
MR = rgbList[0].Where((item, index) => index % 4 == 2 || index % 4 == 3).Take(listSize / 2 - i).ToList();
MG = rgbList[1].Where((item, index) => index % 4 == 2 || index % 4 == 3).Take(listSize / 2 - i).ToList();
MB = rgbList[2].Where((item, index) => index % 4 == 2 || index % 4 == 3).Take(listSize / 2 - i).ToList();
SR = rgbList[0].Skip(2 * i).Where((item, index) => index % 4 == 0 || index % 4 == 1).ToList();
SG = rgbList[1].Skip(2 * i).Where((item, index) => index % 4 == 0 || index % 4 == 1).ToList();
SB = rgbList[2].Skip(2 * i).Where((item, index) => index % 4 == 0 || index % 4 == 1).ToList();
subDiff.Add(UBDiffSum(MR, MG, MB, SR, SG, SB));
MR.Clear();
MG.Clear();
MB.Clear();
SR.Clear();
SG.Clear();
SB.Clear();
}
result = subDiff.IndexOf(subDiff.Min()) + minWidth / 2;
break;
}
return(result);
}