二值图像处理
怎么将只有0和1 两个灰度级的二值图像进行处理，将其扩展成只有0和255二值图像，VC++怎么实现
[解决办法]
试试下面这种方法 自己根据实际情况修改一下
public Bitmap Threshoding(Bitmap b, byte threshold)//threshold可以传1进来
{

int width = b.Width;

int height = b.Height;

BitmapData data = b.LockBits(new Rectangle(0, 0, width, height), ImageLockMode.ReadWrite, PixelFormat.Format32bppArgb);

unsafe

{

byte* p = (byte*)data.Scan0;

int offset = data.Stride - width * 4;

byte R, G, B, gray;

for (int y = 0; y < height; y++)

{

for (int x = 0; x < width; x++)

{

R = p[2];

G = p[1];

B = p[0];

gray = (byte)((R * 19595 + G * 38469 + B * 7472) >> 16);

if (gray >= threshold)

{

p[0] = p[1] = p[2] = 255;

}

else

{

p[0] = p[1] = p[2] = 0;

}

p += 4;

}

p += offset;

}

b.UnlockBits(data);

return b;

}



}