public static Bitmap ImageToBitmap(GrayscaleByteImage image)
{
Bitmap B = new Bitmap(image.Width, image.Height, PixelFormat.Format24bppRgb);
LockBitmapInfo lbi = LockBitmap(B);
try
{
for (int j = 0; j < image.Height; j++)
{
for (int i = 0; i < image.Width; i++)
{
byte c = image[i, j];
lbi.data[lbi.linewidth * j + i * 4] = c;
lbi.data[lbi.linewidth * j + i * 4 + 1] = c;
lbi.data[lbi.linewidth * j + i * 4 + 2] = c;
}
}
}
finally
{
UnlockBitmap(lbi);
}
return(B);
}
public GrayscaleByteImage ToGrayscaleByteImage()
{
GrayscaleByteImage res = new GrayscaleByteImage(Width, Height);
for (int i = 0; i < res.rawdata.Length; i++)
{
res.rawdata[i] = rawdata[i] < 0.0f ? (byte)0 : rawdata[i] > 255.0f ? (byte)255 : (byte)rawdata[i];
}
return(res);
}
public static GrayscaleByteImage FileToGrayscaleByteImage(string filename)
{
if (CheckPGM(filename))
{
return(ReadPGM(filename).ToGrayscaleByteImage());
}
Bitmap B = new Bitmap(filename);
GrayscaleByteImage res = BitmapToGrayscaleByteImage(B);
B.Dispose();
return(res);
}
public static void ImageToFile(GrayscaleByteImage image, string filename)
{
using (Bitmap B = ImageToBitmap(image))
B.Save(filename);
}
public static GrayscaleByteImage BitmapToGrayscaleByteImage(Bitmap B)
{
int W = B.Width, H = B.Height;
GrayscaleByteImage res = new GrayscaleByteImage(W, H);
if (B.PixelFormat == PixelFormat.Format8bppIndexed)
{
Color[] pi = B.Palette.Entries;
byte[] pal = new byte[1024];
for (int i = 0; i < pi.Length; i++)
{
Color C = pi[i];
pal[i * 4] = C.B;
pal[i * 4 + 1] = C.G;
pal[i * 4 + 2] = C.R;
pal[i * 4 + 3] = C.A;
}
LockBitmapInfo lbi = LockBitmap(B, PixelFormat.Format8bppIndexed, 1);
try
{
for (int j = 0; j < H; j++)
{
for (int i = 0; i < W; i++)
{
int c = lbi.data[lbi.linewidth * j + i];
int b = pal[c * 4];
int g = pal[c * 4 + 1];
int r = pal[c * 4 + 2];
res[i, j] = (byte)(0.114f * b + 0.587f * g + 0.299f * r);
}
}
}
finally
{
UnlockBitmap(lbi);
}
}
else
{
LockBitmapInfo lbi = LockBitmap(B);
try
{
for (int j = 0; j < H; j++)
{
for (int i = 0; i < W; i++)
{
int b = lbi.data[lbi.linewidth * j + i * 4];
int g = lbi.data[lbi.linewidth * j + i * 4 + 1];
int r = lbi.data[lbi.linewidth * j + i * 4 + 2];
res[i, j] = (byte)(0.114f * b + 0.587f * g + 0.299f * r);
}
}
}
finally
{
UnlockBitmap(lbi);
}
}
return(res);
}