C#图像处理之图像平移的方法

本文实例讲述了c#图像处理之图像平移的方法。分享给大家供大家参考。具体如下：

//定义图像平移函数
private static bitmap offsetp(bitmap a,int s,int v)
{
 system.drawing.imaging.bitmapdata srcdata = a.lockbits(new rectangle (0,0,a.width ,a.height) ,system .drawing .imaging .imagelockmode .readwrite ,a.pixelformat );
 intptr ptr = srcdata.scan0;
 int bytes = srcdata.stride * a.height;
 byte[]grayvlaues=new byte[bytes];
 system.runtime.interopservices.marshal.copy(ptr ,grayvlaues ,0,bytes);
 byte[] temparray=new byte[bytes];
 for (int i = 0; i < bytes; i++)
 {
  temparray[i] = 255;
 }
 for (int i = 0; i < a.width * 3; i += 3)
 {
  if ((i + s*3) < a.width*3 && (i + s*3) > 0)
  {
   for (int j = 0; j < a.height; j++)
   {
   if ((j + v) < a.height && (j + v) > 0)
   {
   temparray[(i + s * 3) + (j + v) * srcdata.stride] = grayvlaues[i + j * srcdata.stride];
   temparray[i + s * 3 + 1 + (j + v) * srcdata.stride] = grayvlaues[i + 1 + j * srcdata.stride];
   temparray[i + s * 3 + 2 + (j + v) * srcdata.stride] = grayvlaues[i + 2 + j * srcdata.stride];
   }
   }
  }
  }
 grayvlaues = (byte[])temparray.clone();
 system.runtime.interopservices.marshal.copy(grayvlaues ,0,ptr, bytes);
 a.unlockbits(srcdata );
 return a;
}

希望本文所述对大家的c#程序设计有所帮助。