static public HSI[,] BGR2HSI(BGR[,] Source)
{
int Height = Source.GetLength(0), Width = Source.GetLength(1);
HSI[,] Result = new HSI[Height, Width];
int X, Y;
for (Y = 0; Y < Height; ++Y)
{
for (X = 0; X < Width; ++X)
{
Result[Y, X] = Source[Y, X].ToHSI();
}
}
return(Result);
}
static public BGR HSI2BGR(HSI Source)
{
double R, G, B;
const double P = Math.PI / 180.0;
double I = Source.I;
double S = Source.S;
double H = Source.H;
double SI = Source.I * Source.S;
if (H < 120)
{
double cos1 = Math.Cos(H * P);
double cos2 = Math.Cos((60 - H) * P);
R = I + SI * cos1 / cos2;
B = I - SI;
G = 3 * I - R - B;
}
else if (H < 240)
{
double cos1 = Math.Cos((H - 120) * P);
double cos2 = Math.Cos((180 - H) * P);
R = I - SI;
G = I + SI * cos1 / cos2;
B = 3 * I - R - G;
}
else if (H < 360)
{
double cos1 = Math.Cos((H - 240) * P);
double cos2 = Math.Cos((300 - H) * P);
G = I - SI;
B = I + SI * cos1 / cos2;
R = 3 * I - G - B;
}
else
{
throw new ArgumentException("輸入HSI不正確", "HSI");
}
R *= 255;
G *= 255;
B *= 255;
return(new BGR(DoubleToByte(R), DoubleToByte(G), DoubleToByte(B)));
}
static public HSIComplexImg BGR2HSI(BGRComplexImg Source)
{
HSIComplexImg Result = new HSIComplexImg(Source.Width, Source.Height);
BGR TmpBGR = new BGR();
HSI TmpHSI = null;
int X, Y;
for (Y = 0; Y < Source.Height; ++Y)
{
for (X = 0; X < Source.Width; ++X)
{
TmpBGR.R = DoubleToByte(Source.R[Y, X].Re);
TmpBGR.B = DoubleToByte(Source.B[Y, X].Re);
TmpBGR.G = DoubleToByte(Source.G[Y, X].Re);
TmpHSI = TmpBGR.ToHSI();
Result.H[Y, X].Re = TmpHSI.H;
Result.S[Y, X].Re = TmpHSI.S;
Result.I[Y, X].Re = TmpHSI.I;
}
}
return(Result);
}
static public BGRComplexImg HSI2BGR(HSIComplexImg Source)
{
BGRComplexImg Result = new BGRComplexImg(Source.Width, Source.Height);
HSI TmpHSI = new HSI();
BGR TmpBGR = null;
int X, Y;
for (Y = 0; Y < Source.Height; ++Y)
{
for (X = 0; X < Source.Width; ++X)
{
TmpHSI.H = Source.H[Y, X].Re;
TmpHSI.S = Source.S[Y, X].Re;
TmpHSI.I = Source.I[Y, X].Re;
TmpBGR = TmpHSI.ToBGR();
Result.R[Y, X].Re = TmpBGR.R;
Result.G[Y, X].Re = TmpBGR.G;
Result.B[Y, X].Re = TmpBGR.B;
}
}
return(Result);
}
static public BGR FromHSI(HSI Source)
{
return(ImgF.HSI2BGR(Source));
}
