private void SetImage_toFloat(Bitmap bmp)
{
Util.FreeBuffer(ref imgBuf);
ImageUtil.BitmapToGrayImageBuffer(bmp, ref imgBuf, ref bw, ref bh, ref bytepp);
// byte -> float
unsafe {
var bufOld = imgBuf;
imgBuf = Marshal.AllocHGlobal(bw * bh * 4);
for (int y = 0; y < bh; y++)
{
var pbyte = (byte *)bufOld + y * bw;
var pfloat = (float *)imgBuf + y * bw;
for (int x = 0; x < bw; x++, pbyte++, pfloat++)
{
*pfloat = (float)*pbyte / 255;
}
}
Marshal.FreeHGlobal(bufOld);
}
bytepp = 4;
imgBox.SetImageBuffer(imgBuf, bw, bh, bytepp, true);
imgBox.Invalidate();
}
