VC6.0图形处理7--边缘检测

- 日理万妓 2022-06-18 01:40 152阅读 0赞

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

//边缘检测主要的思想是利用灰度变化率，找出变化大的地方，大多采用Sobel算子，Prewitt算子，和LapLacian算子等方式，只是算子不同，其他的均一样

void CBMPViewerDoc::OnMenuitem32793() //Sobel算子  
\{  
// 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;  
int xsum ,ysum ,sum;  
int x\_template\[9\] = \{-1, 0, 1 ,-2 ,0,2 , -1, 0,1 \};  
int y\_template\[9\] = \{1,2,1,0 , 0 , 0 ,-1 ,-2 ,-1\};  
// TODO: Add your command handler code here  
for(int i = 0 ; i< bi.biHeight ; i++)\{  
  
for(int j = 0 ; j< bi.biWidth ; j++)\{  
lpDest = (unsigned char \*)lpTemp + linewidth \*(bi.biHeight - i -1) + j;   
if((i == 0 ) || (j ==0) || (i == bi.biHeight) || (j == bi.biWidth) )\{  
lpScr = (unsigned char\*)lpBuf + linewidth\*(bi.biHeight - i -1) + j;  
\*lpDest = \*lpScr;  
\}   
else\{  
xsum = 0 ;  
ysum = 0;  
for(int m = i -1 ; m <= i+1 ;m++)\{  
for(int n = j-1; n<=j+1; n++)\{  
lpScr = (unsigned char\*)lpBuf + linewidth\*(bi.biHeight - m -1) + n;  
xsum += (\*lpScr) \* x\_template\[3\*(m - i +1) + n - j +1\];  
ysum += (\*lpScr) \* y\_template\[3\*(m - i +1) + n - j +1\];  
\}  
\}  
sum = (int)sqrt(pow(xsum, 2) + pow(ysum , 2));  
if((sum >= 0 )&&(sum <= 255))  
\{  
\*lpDest = sum;  
\}  
else if(sum > 255) \*lpDest = 255;  
else \*lpDest= 0;  
  
\}  
\}  
  
\}  
      
memcpy(lpBuf, lpTemp, linewidth \* bi.biHeight);  
//Invalidata(TRUE);  
  
UpdateAllViews(NULL,0,NULL);  
  
\}  
  
  
void CBMPViewerDoc::OnMenuitem32794() //Prewitt算子  
\{  
// 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;  
int xsum ,ysum ,sum;  
int x\_template\[9\] = \{-1, 0, 1 ,-1 ,0,1 , -1, 0,1 \};  
int y\_template\[9\] = \{1,1,1,0 , 0 , 0 ,-1 ,-1 ,-1\};  
// TODO: Add your command handler code here  
for(int i = 0 ; i< bi.biHeight ; i++)\{  
  
for(int j = 0 ; j< bi.biWidth ; j++)\{  
lpDest = (unsigned char \*)lpTemp + linewidth \*(bi.biHeight - i -1) + j;   
if((i == 0 ) || (j ==0) || (i == bi.biHeight) || (j == bi.biWidth) )\{  
lpScr = (unsigned char\*)lpBuf + linewidth\*(bi.biHeight - i -1) + j;  
\*lpDest = \*lpScr;  
\}   
else\{  
xsum = 0 ;  
ysum = 0;  
for(int m = i -1 ; m <= i+1 ;m++)\{  
for(int n = j-1; n<=j+1; n++)\{  
lpScr = (unsigned char\*)lpBuf + linewidth\*(bi.biHeight - m -1) + n;  
xsum += (\*lpScr) \* x\_template\[3\*(m - i +1) + n - j +1\];  
ysum += (\*lpScr) \* y\_template\[3\*(m - i +1) + n - j +1\];  
\}  
\}  
sum = (int)sqrt(pow(xsum, 2) + pow(ysum , 2));  
if((sum >= 0 )&&(sum <= 255))  
\{  
\*lpDest = sum;  
\}  
else if(sum > 255) \*lpDest = 255;  
else \*lpDest= 0;  
  
\}  
\}  
  
\}  
      
memcpy(lpBuf, lpTemp, linewidth \* bi.biHeight);  
//Invalidata(TRUE);  
  
UpdateAllViews(NULL,0,NULL);  
  
\}  
  
  
void CBMPViewerDoc::OnMenuitem32795() //Laplacian 算子  
\{  
// 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;  
int xsum ,ysum ,sum;  
int x\_template\[9\] = \{0, -1, 0 ,-1 ,4,-1 ,  0,-1,0 \};  
int y\_template\[9\] = \{-1,-1,-1,-1 , 8 , -1 ,-1 ,-1 ,-1\};  
// TODO: Add your command handler code here  
for(int i = 0 ; i< bi.biHeight ; i++)\{  
  
for(int j = 0 ; j< bi.biWidth ; j++)\{  
lpDest = (unsigned char \*)lpTemp + linewidth \*(bi.biHeight - i -1) + j;   
if((i == 0 ) || (j ==0) || (i == bi.biHeight) || (j == bi.biWidth) )\{  
lpScr = (unsigned char\*)lpBuf + linewidth\*(bi.biHeight - i -1) + j;  
\*lpDest = \*lpScr;  
\}   
else\{  
xsum = 0 ;  
ysum = 0;  
for(int m = i -1 ; m <= i+1 ;m++)\{  
for(int n = j-1; n<=j+1; n++)\{  
lpScr = (unsigned char\*)lpBuf + linewidth\*(bi.biHeight - m -1) + n;  
xsum += (\*lpScr) \* x\_template\[3\*(m - i +1) + n - j +1\];  
ysum += (\*lpScr) \* y\_template\[3\*(m - i +1) + n - j +1\];  
\}  
\}  
sum = (int)sqrt(pow(xsum, 2) + pow(ysum , 2));  
if((sum >= 0 )&&(sum <= 255))  
\{  
\*lpDest = sum;  
\}  
else if(sum > 255) \*lpDest = 255;  
else \*lpDest= 0;  
  
\}  
\}  
  
\}  
      
memcpy(lpBuf, lpTemp, linewidth \* bi.biHeight);  
//Invalidata(TRUE);  
  
UpdateAllViews(NULL,0,NULL);  
\}

//未完待续

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