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hough检测直线



typedef struct MAXVALUE{

 int iDist;

 int iAngle;

 int iMax;

}MAXVALUE;



/*

 * 检测直线

 */

void TraceBeeline(int ImageWidth,int ImageHeight,LPBYTE lpSrc,LPBYTE lpDest,int len)

{

// #define pi 3.1415927

 int iMaxAngle = 90;

 int iAngleNumber = 0;

 //最大值

 MAXVALUE MaxValue1;

 memset(&MaxValue1,0,sizeof(MAXVALUE));

 //循环变量

 int i;

 int j;

 int off = 0;

 int iMaxDistance = 0,iDistance = 0;

 iMaxDistance = (int)sqrt(ImageWidth * ImageWidth   ImageHeight * ImageHeight);

 int  *lpTrans = new int[iMaxDistance * iMaxAngle];

 memset(lpTrans,0,iMaxDistance * iMaxAngle * sizeof(int));

    //去掉孤立点

    for(j=1,off=0;j<ImageHeight-1;j  )

  for(i=1;i<ImageWidth-1;i  ,off)

  {

   if(1==lpSrc[off])

   {

    if(lpSrc[off-1]==0&&lpSrc[off 1]==0&&lpSrc[off-ImageWidth]==0&&lpSrc[off ImageWidth]==0 /

     lpSrc[off-ImageWidth-1]==0&&lpSrc[off-ImageWidth 1]==0&&lpSrc[off ImageWidth-1]==0&&lpSrc[off ImageWidth 1]==0)

     lpSrc[off]=0;

   }

  }

 //////////////////////////////



 for(j=0;j<ImageHeight;j  )

  for(i=0;i<ImageWidth;i  )

  {

   off = j * ImageWidth   i;

   if(1==lpSrc[off])

   {

    for(iAngleNumber=0;iAngleNumber<iMaxAngle;iAngleNumber  )

    {

     iDistance = (int)fabs(i * cos(iAngleNumber * 2 * PI/180.0)   j * sin(iAngleNumber * 2 * PI/180.0));

     if(iDistance>=0&&iDistance<iMaxDistance)

         lpTrans[iDistance * iMaxAngle   iAngleNumber]  ;

    }

   }

  }



 //找到最大值

  for(i = 0;i < iMaxDistance;i  )

   for(iAngleNumber=0;iAngleNumber<iMaxAngle;iAngleNumber  )

   {

    if(lpTrans[i * iMaxAngle   iAngleNumber]>MaxValue1.iMax)

    {

     MaxValue1.iMax = (int)lpTrans[i * iMaxAngle   iAngleNumber];

                    MaxValue1.iAngle = iAngleNumber;

     MaxValue1.iDist = i;

    }

   }



 //  



   for(j=0;j<ImageHeight;j  )

    for(i=0;i<ImageWidth;i  )

    {

     off = j * ImageWidth   i;

                    iDistance = (int)fabs(i * cos(iAngleNumber * 2 * PI/180.0)   j * sin(iAngleNumber * 2 * PI/180.0));

     if(iDistance == MaxValue1.iMax)

      lpDest[off]=1;

    }





 if(lpTrans)

 {

  delete lpTrans;

  lpTrans = NULL;

 }

}