RGB<->YUY2

載點
https://docs.google.com/uc?id=0B4PwTcFHZPWbZGUwYTJkMmQtNjkxZi00YTMwLWJhMTEtNDE4N2U5ZThhYjNm&export=download&hl=zh_TW

外觀

關鍵程式碼:
void __fastcall TForm1::RGBToYUY2(Graphics::TBitmap *FrBmp,BYTE *dst)
{
  unsigned char *p,*src;
  int len,w,h,x,y;
  w=FrBmp->Width;
  h=FrBmp->Height;
  for(y=0;y<h;y++)
  {
    src=(unsigned char*)FrBmp->ScanLine[y];
    for(x=0;x<w;x+=2,src+=6,dst+=4)
    {
...
...
    }
  }
}
//---------------------------------------------------------------------------

HRESULT __fastcall TForm1::YUY2ToBMP(BYTE *yuy2,Graphics::TBitmap *dstbmp)
{
  int x,y;
  unsigned char *ty,*tu,*tv;
  ty=(unsigned char*)malloc(dstbmp->Width*dstbmp->Height);
  tu=(unsigned char*)malloc(dstbmp->Width*dstbmp->Height);
  tv=(unsigned char*)malloc(dstbmp->Width*dstbmp->Height);
  BYTE *pt,*py,*pu,*pv;
  pt=yuy2;
  py=ty;
  pu=tu;
  pv=tv;
  for(int y=0;y<dstbmp->Height;y++)
  {
    for(int x=0;x<dstbmp->Width;x+=2)
    {
....
....   
    }
  }
  py=ty;
  pu=tu;
  pv=tv;
  for(y=0;y<dstbmp->Height;y++)
  {
    char *linep=(char*)dstbmp->ScanLine[y];
    for(x=0;x<dstbmp->Width;x++)
    {
      unsigned int y=(*py++);
      int u=(int)(*pu++)-128;
      int v=(int)(*pv++)-128;
      float R,G,B;
      R = (float)y + 1.6*(float)u;
      G = (float)y - 0.9*(float)v - 0.5*(float)u;
      B = (float)y + 1.5*(float)v;
      if(R<0) R=0;
      if(R>255) R=255;
      if(G<0) G=0;
      if(G>255) G=255;
      if(B<0) B=0;
      if(B>255) B=255;
      *linep++=R;
      *linep++=G;
      *linep++=B;
    }
  }
  free(ty);
  free(tu);
  free(tv);
  return S_OK;
}
//---------------------------------------------------------------------------

RGB與YUY2轉換,不過轉換後圖檔看起來有些微差異...