public static void ImageSave_PPM(ColorRGB8[,] image, string imgPath)
{
int imgh = image.GetLength(0), imgw = image.GetLength(1);
FileStream fs = new FileStream(imgPath, FileMode.Create);
BinaryWriter bw = new BinaryWriter(fs);
string imghead = $"P6\n{imgw} {imgh}\n255\n";
byte[] headcont = Encoding.ASCII.GetBytes(imghead);
bw.Write(headcont);
bw.Flush();
for (int i = 0; i < imgh; ++i)
{
for (int j = 0; j < imgw; j++)
{
ColorRGB8 c = image[i, j];
bw.Write(c.R);
bw.Write(c.G);
bw.Write(c.B);
}
bw.Flush();
}
bw.Flush();
bw.Close();
fs.Close();
}
public static ColorRGB8[,] ConvertToRGB8Image(XYZSpectrum[,] img)
{
int imgh = img.GetLength(0), imgw = img.GetLength(1);
ColorRGB8[,] re = new ColorRGB8[imgh, imgw];
for (int j = 0; j < imgh; j++)
{
for (int i = 0; i < imgw; i++)
{
re[j, i] = GetColor8Gamma22(img[j, i].ToRGB());
}
}
return(re);
}
public static ColorRGB8[,] ConvertToRGB8Image(Float[,] img)
{
int imgh = img.GetLength(0), imgw = img.GetLength(1);
ColorRGB8[,] re = new ColorRGB8[imgh, imgw];
for (int j = 0; j < imgh; j++)
{
for (int i = 0; i < imgw; i++)
{
byte g = (byte)(Tools.Clamp(img[j, i] * 255, 0.0f, 10.0f));
re[j, i] = new ColorRGB8(g);
}
}
return(re);
}
public static void ImageSave_PNG(ColorRGB8[,] image, string imgPath)
{
int imgh = image.GetLength(0), imgw = image.GetLength(1);
//Image<SixLabors.ImageSharp.PixelFormats.Rgb24> img = new Image<SixLabors.ImageSharp.PixelFormats.Rgb24>(imgw, imgh);
Bitmap img = new Bitmap(imgw, imgh);
for (int i = 0; i < imgh; ++i)
{
for (int j = 0; j < imgw; j++)
{
ColorRGB8 c = image[i, j];
img.SetPixel(j, i, Color.FromArgb(c.R, c.G, c.B));
}
}
img.Save(imgPath, System.Drawing.Imaging.ImageFormat.Png);
}
public static ColorRGB8[,] ConvertToRGB8Image(int[,] data, int maxvalue)
{
int imgh = data.GetLength(0), imgw = data.GetLength(1);
ColorRGB8[,] re = new ColorRGB8[imgh, imgw];
float mvalue = 1.0f / maxvalue;
for (int j = 0; j < imgh; j++)
{
for (int i = 0; i < imgw; i++)
{
byte b = (byte)(Tools.Clamp(data[j, i] * mvalue, 0.0f, 1.0f) * 255);
re[j, i] = new ColorRGB8(b);
}
}
return(re);
}