static public System.Drawing.Bitmap ByteBitmapToBitmap(ByteBitmap aBmpR, ByteBitmap aBmpG, ByteBitmap aBmpB)
{
Bitmap lBmp = new System.Drawing.Bitmap(aBmpR.Width, aBmpR.Height, PixelFormat.Format32bppPArgb);
BitmapData lBmpDta = lBmp.LockBits(new Rectangle(0, 0, lBmp.Width, lBmp.Height), ImageLockMode.WriteOnly, PixelFormat.Format32bppPArgb);
try
{
IntPtr lScan0 = lBmpDta.Scan0;
Int32[] lRow = new Int32[lBmp.Width];
SARGB lRGB = new SARGB(3, 2, 1, 0);
lRGB.A = 0xff; lRGB.R = 0xff;
lRGB.G = 0xFF; lRGB.B = 0xff;
for (int ly = 0; ly < lBmp.Height; ly++)
{
for (int lx = 0; lx < lBmp.Width; lx++)
{
lRGB.R = aBmpR[lx, ly];
lRGB.G = aBmpG[lx, ly];
lRGB.B = aBmpB[lx, ly];
lRow[lx] = lRGB.Value;
}
//copy to row
Marshal.Copy(lRow, 0, new IntPtr(lScan0.ToInt64() + (sizeof(Int32) * ly * lBmp.Width)), lRow.Length);
}
}
finally
{
//unlock
lBmp.UnlockBits(lBmpDta);
}
return(lBmp);
}
static public ByteBitmap BitmapToByteBitmap(Bitmap aBmp, int R = 30, int G = 59, int B = 11)
{
if (null == aBmp)
{
throw new ArgumentNullException("aBmp is null");
}
int lWidth = aBmp.Width;
int lHeight = aBmp.Height;
ByteBitmap lRes = new ByteBitmap(lWidth, lHeight);
System.Drawing.Bitmap lBmp = new System.Drawing.Bitmap(lWidth, lHeight, PixelFormat.Format32bppPArgb);
try
{
//draw it
Graphics lgrf = Graphics.FromImage(lBmp);
lgrf.DrawImage(aBmp, 0, 0, lBmp.Width, lBmp.Height);
lgrf.Dispose();
//lock bitmap bits for reading
BitmapData lBmpDta = lBmp.LockBits(new Rectangle(0, 0, lBmp.Width, lBmp.Height), ImageLockMode.ReadOnly, PixelFormat.Format32bppPArgb);
try
{
IntPtr lScan0 = lBmpDta.Scan0;
Int32[] lRow = new Int32[lBmp.Width];
SARGB lRGB = new SARGB(3, 2, 1, 0);
var sum = R + G + B;
for (int ly = 0; ly < lBmp.Height; ly++)
{
//get the bitmap row
Marshal.Copy(new IntPtr(lScan0.ToInt64() + (sizeof(Int32) * ly * lBmp.Width)), lRow, 0, lRow.Length);
//copy to
for (int lx = 0; lx < lBmp.Width; lx++)
{
lRGB.Value = lRow[lx];
//http://en.wikipedia.org/wiki/Grayscale
//30% of the red value, 59% of the green value, and 11% of the blue value
//m_img[lx, ly] = (byte)(Math.Min((30 * lRGB.R + 59 * lRGB.G + 11 * lRGB.B) / 100, 255));
//simple
var avg = (lRGB.R * R + lRGB.G * G + lRGB.B * B) / sum;
lRes[lx, ly] = (byte)Math.Min(avg, 255f);
}
}
}
finally
{
//unlock
lBmp.UnlockBits(lBmpDta);
}
}
finally
{
//delete
lBmp.Dispose();
}
return(lRes);
}
