public static CifarItem ReadCifarImage(byte[] bb, long start)
{
var w = 32;
var h = 32;
Bitmap bmp = new Bitmap(32, 32);
var label = bb[start];
CifarItem ret = new CifarItem();
ret.label = label;
start++;
NativeBitmap b = new NativeBitmap(bmp);
for (int j = 0; j < h; j++)
{
for (int i = 0; i < w; i++)
{
var _ind = (i * w + j);
b.SetPixel(j, i, new byte[] { bb[start + _ind], bb[start + 1024 + _ind], bb[start + 2048 + _ind], 0xff });
}
}
ret.Bmp = b.GetBitmap();
var x = new InternalArray(new int[] { 1, 3, 32, 32 });
for (var dc = 0; dc < 3; dc++)
{
var i = 0;
for (var xc = 0; xc < 32; xc++)
{
for (var yc = 0; yc < 32; yc++)
{
var px = ret.Bmp.GetPixel(xc, yc);
var bt = (byte)((px.ToArgb() & (dc << 8)) >> 8);
x.Set4D(0, dc, xc, yc, bt / 255.0f - 0.5f);
i++;
}
}
}
ret.x = x;
return(ret);
}
public NativeBitmap GetBitmap()
{
if (_bitmap != null)
{
return(_bitmap);
}
Bitmap bmp = new Bitmap(Data.GetLength(0), Data.GetLength(1));
NativeBitmap rom = new NativeBitmap(bmp);
for (int i = 0; i < Data.GetLength(0); i++)
{
for (int j = 0; j < Data.GetLength(1); j++)
{
rom.SetPixel(i, j, new[] { Data[i, j], Data[i, j], Data[i, j], (byte)255 });
}
}
_bitmap = rom;
return(_bitmap);
}