Win8Metro(C#)数字图像处理--2.18图像平移变换

原文:Win8Metro(C#)数字图像处理--2.18图像平移变换



[函数名称]

图像平移变换函数TranslationProcess(WriteableBitmap
src,int x,int
y)

[函数代码]

       ///<summary>

       ///
Translation process.

       ///</summary>

       ///<param
name="src">Source image.</param>

       ///<param
name="x">Translate value of x.</param>

       ///<param
name="y">Translate value of y.</param>

       ///<returns></returns>

       publicstaticWriteableBitmap
TranslationProcess(WriteableBitmap src,int
x,int y)////18平移变换

       {

           if(src!=null
)

           {

           int
w = src.PixelWidth;

           int
h = src.PixelHeight;

           WriteableBitmap
translateImage =newWriteableBitmap(w,
h);

           byte[]
temp = src.PixelBuffer.ToArray();

           byte[]
tempMask =newbyte[w
* h * 4];

           for
(int j = 0; j < h; j++)

           {

               for
(int i = 0; i < w; i ++)

               {

                   if
(i + x < 0 || i + x >= w || j + y < 0 || j + y >= h)

                   {

                       tempMask[i * 4 + j * w * 4] = (byte)0;

                       tempMask[i * 4 + 1 + j * w * 4] = (byte)0;

                       tempMask[i * 4 + 2 + j * w * 4] = (byte)0;

                   }

                   else

                   {

                       tempMask[i * 4 + j * w * 4] = (byte)(temp[(i
+ x) * 4 + (j + y) * w * 4]);

                       tempMask[i * 4 + 1 + j * w * 4] = (byte)(temp[(i
+ x) * 4 + 1 + (j + y) * w * 4]);

                       tempMask[i * 4 + 2 + j * w * 4] = (byte)(temp[(i
+ x) * 4 + 2 + (j + y) * w * 4]);

                       tempMask[i * 4 + 3 + j * w * 4] = (byte)(temp[(i
+ x) * 4 + 3 + (j + y) * w * 4]);

                   }

               }

           }

           Stream
sTemp = translateImage.PixelBuffer.AsStream();

           sTemp.Seek(0,
SeekOrigin.Begin);

           sTemp.Write(tempMask, 0, w * 4 * h);

           return
translateImage;

           }

           else

           {

               returnnull;

           }  

       }

[图像效果]