VC6.0图形处理8--Hough变换（下）

男娘i 2022-06-18 01:45 131阅读 0赞

源码下载：[http://download.csdn.net/detail/renshengrumenglibing/3875522][http_download.csdn.net_detail_renshengrumenglibing_3875522]

//请先仔细研读Hough变化的算法问题

void CBMPViewerDoc::OnMenuitem32796() //Hough变化

\{//现在只能处理二值图像  
  
  
  
// TODO: Add your command handler code here  
int linewidth;  
linewidth=(pbi->bmiHeader.biWidth\*pbi->bmiHeader.biBitCount+31)/32\*4;  
  
  
  
  
HLOCAL hTemp;  
hTemp = LocalAlloc(LHND ,linewidth \* bi.biHeight );  
  
LPSTR lpTemp;  
lpTemp = (char\*)LocalLock(hTemp);  
unsigned char \*lpScr;  
unsigned char \* lpDest;  
  
  
  
  
HLOCAL hTransArea;  
  
  
hTransArea = LocalAlloc(LHND, bi.biWidth \* bi.biHeight \*sizeof(int));  
LPSTR lpTransArea;  
lpTransArea = (char \*)(LocalLock(hTransArea));  
  
  
   //变换域尺寸  
int iMaxAngleNumber;  
int iMaxDist;  
  
  
unsigned char  pixel;  
  
  
int iDest;  
int iAngleNumber;  
//变换域两个最大值  
int MaxValue1 , MaxValue2;  
    //最大距离  
iMaxDist = (int)(sqrt(bi.biHeight \*bi.biHeight + bi.biWidth + bi.biWidth));  
//每格两度  
iMaxAngleNumber = 180;  
//为内存赋初值  
  
  
int  Dist;//存放变换域中最大那个数的位置  
     int AngleNumber;  
  
  
memset(lpTransArea , 0 , bi.biWidth \* bi.biHeight \*sizeof(int));  
  
  
  
  
// TODO: Add your command handler code here  
for(int i = 0 ; i< bi.biHeight ; i++)\{  
for(int j = 0 ; j< bi.biWidth ; j++)\{  
lpScr = (unsigned char \*)lpBuf+linewidth\*(bi.biHeight - i -1) + j;  
  pixel = \*lpScr;  
  if(pixel  ==0)\{  
  for(iAngleNumber = 0 ; iAngleNumber < iMaxAngleNumber; iAngleNumber++)\{  
iDest = (int)(fabs(i\*cos(iAngleNumber\*2\*PI/180.0)) + j\*(sin(iAngleNumber\*2 \*PI/180.0)));  
\*(lpTransArea+iDest\*iMaxAngleNumber + iAngleNumber) = \*(lpTransArea+iDest\*iMaxAngleNumber + iAngleNumber)+1;  
  
  
  \}  
  \}  
  
  
  
  
\}  
  
\}  
  
  
//找变换域中的两个最大点  
  MaxValue1 = 0 ;  
    
  for( iDest = 0 ; iDest < iMaxDist ; iDest++)\{  
for(iAngleNumber = 0 ; iAngleNumber < iMaxAngleNumber ; iAngleNumber++)\{  
   
 lpDest =(unsigned char\*)(lpTransArea + iDest\*iMaxAngleNumber + iAngleNumber);  
   
if(\*lpDest > MaxValue1)\{  
MaxValue1 = \*lpDest;  
Dist = iDest;  
AngleNumber = iAngleNumber;  
  
  
\}  
\}  
\}  
  
  
  //重绘该直线  
  
  
  for(int m = 0 ;m< bi.biHeight; m++)\{  
 for(int n = 0 ; n< bi.biWidth; n++)\{  
lpDest = (unsigned char \*)lpTemp + linewidth \* (bi.biHeight-m -1) + n;   
iDest = (int)(fabs(m\*cos(AngleNumber\*2\*PI/180.0)) + n\*(sin(AngleNumber\*2 \*PI/180.0)));  
if((iDest -Dist) < 2 &&(iDest - Dist) > -2)\{  
\*lpDest = 0 ;  
\}  
else\{  
              \*lpDest = 255;  
\}  
       
  
  
  
  
  
 \}  
  \}  
  
  
memcpy(lpBuf, lpTemp, linewidth \* bi.biHeight);  
// Invalidata(TRUE);  
UpdateAllViews(NULL,0,NULL);  
  
  
  
\}

[http_download.csdn.net_detail_renshengrumenglibing_3875522]: http://download.csdn.net/detail/renshengrumenglibing/3875522