private Bitmap GetGrayBitmap(int xOff, int yOff, int xSize, int ySize)
{
Rect rect = new Rect(xOff, yOff, xSize, ySize);
RasterData rasterData = rasterDatas[0];
double[] data = rasterData.ReadRasterData((int)rect.X, (int)rect.Y, (int)rect.Width, (int)rect.Height);
//float min = data.Min();
//float max = data.Max();
//double denominator = max - min;
double min = rasterData.MinMax[0];
double max = rasterData.MinMax[1];
double denominator = max - min;
const int bpp = 4;
byte[] bytes = new byte[xSize * ySize * bpp];
for (int row = 0; row < ySize; row++)
{
for (int col = 0; col < xSize; col++)
{
double result = data[row * xSize + col];
byte value = (byte)(int)((result - min) * 255 / denominator);
bytes[row * xSize * bpp + col * bpp] = value;
bytes[row * xSize * bpp + col * bpp + 1] = value;
bytes[row * xSize * bpp + col * bpp + 2] = value;
bytes[row * xSize * bpp + col * bpp + 3] = 255;
}
}
return(ImageControl.GetBitmap(bytes, xSize, ySize, PixelFormat.Format32bppRgb));
}
private Bitmap GetRgbBitmap(int xOff, int yOff, int xSize, int ySize)
{
Rect rect = new Rect();
rect.X = xOff;
rect.Y = yOff;
rect.Width = xSize;
rect.Height = ySize;
//byte[] R = new byte[xSize * ySize];
//byte[] G = new byte[xSize * ySize];
//byte[] B = new byte[xSize * ySize];
double[] R = new double[xSize * ySize];
double[] G = new double[xSize * ySize];
double[] B = new double[xSize * ySize];
for (int i = 0; i < rasterDatas.Count; i++)
{
if (rasterDatas[i].Band.GetRasterColorInterpretation() == ColorInterp.GCI_RedBand)
{
R = rasterDatas[i].GetRaster(rect);
//R = GetByteValue(data, xSize, ySize, rasterDatas[i].Data.Min(), rasterDatas[i].Data.Max());
}
else if (rasterDatas[i].Band.GetRasterColorInterpretation() == ColorInterp.GCI_GreenBand)
{
G = rasterDatas[i].GetRaster(rect);
//G = GetByteValue(data, xSize, ySize, rasterDatas[i].Data.Min(), rasterDatas[i].Data.Max());
}
else if (rasterDatas[i].Band.GetRasterColorInterpretation() == ColorInterp.GCI_BlueBand)
{
B = rasterDatas[i].GetRaster(rect);
//B = GetByteValue(data, xSize, ySize, rasterDatas[i].Data.Min(), rasterDatas[i].Data.Max());
}
}
double min = rasterDatas[0].Data.Min();
double max = rasterDatas[0].Data.Max();
double denominator = max - min;
const int bpp = 4;
byte[] bytes = new byte[xSize * ySize * bpp];
for (int row = 0; row < ySize; row++)
{
for (int col = 0; col < xSize; col++)
{
var red = R[row * xSize + col];
var green = G[row * xSize + col];
var blue = B[row * xSize + col];
byte redByte = (byte)(int)((red - min) * 255 / denominator);
byte greenByte = (byte)(int)((green - min) * 255 / denominator);
byte blueByte = (byte)(int)((blue - min) * 255 / denominator);
bytes[row * xSize * bpp + col * bpp] = blueByte;
bytes[row * xSize * bpp + col * bpp + 1] = greenByte;
bytes[row * xSize * bpp + col * bpp + 2] = redByte;
if (R[row * xSize + col] + G[row * xSize + col] + B[row * xSize + col] == 0)
{
bytes[row * xSize * bpp + col * bpp + 3] = 0;
}
else
{
bytes[row * xSize * bpp + col * bpp + 3] = 255;
}
}
}
return(ImageControl.GetBitmap(bytes, xSize, ySize, PixelFormat.Format32bppArgb));
}
