C#数字图像处理之图像缩放的方法

//定义图像缩放函数
private static Bitmap ZoomP(Bitmap a, float s, float v)
{
  Bitmap bmp = new Bitmap((int)(a.Width * s), (int)(a.Height * v), System.Drawing.Imaging.PixelFormat.Format24bppRgb);
  Graphics g = Graphics.FromImage(bmp);
  g.Clear(Color .White );
  g.ScaleTransform(s,v);
  g.DrawImage(a,0,0,a.Width ,a.Height );
  a = bmp;
  return a;
}