轮廓跟踪

图像处理-----轮廓跟踪

文档一时没有找到，等找到了马上补上：

 

//轮廓跟踪// unsigned char* Contour(GPtr globals,unsigned char *Gray) {  bool finish=false;  int wn=0;    //w为西，n为北，s为南，e为东  int n=0;  int en=0;  int w=0;  int e=0;  int ws=0;  int s=0;  int es=0;

 w=-1;  e=1;  wn=-gStuff->imageSize.h-1;        //计算各个方向指针的偏移  n=-gStuff->imageSize.h;  en=-gStuff->imageSize.h+1;  ws=gStuff->imageSize.h-1;  s=gStuff->imageSize.h;  es=gStuff->imageSize.h+1;

 int start=NULL;   //内存距离  int middle=NULL;  int end=NULL;  unsigned char* Gray2=NULL;  unsigned char*p=NULL;  int32 filterSize = gStuff->imageSize.v*gStuff->imageSize.h;  Gray2=(unsigned char *)malloc( filterSize);

 int i=0,j=0,bool1=0;  

 for(i=0;i<gStuff->imageSize.v;i++)  //将所有非白的像素变为纯黑  {   for(j=0;j<gStuff->imageSize.h;j++)   {    *(Gray2+(gStuff->imageSize.h*i)+j)=(BYTE)255;  //将Gray2的内存全部写为白色，否则为灰色        if(*(Gray+(gStuff->imageSize.h*i)+j)!=255)    *(Gray+(gStuff->imageSize.h*i)+j)=(BYTE)0;   }  } 

 for(i=0;i<gStuff->imageSize.v;i++)    //取得首个像素的指针  {   for(j=0;j<gStuff->imageSize.h;j++)   {    if(*(Gray+(gStuff->imageSize.h*i)+j)==0)    {      start=gStuff->imageSize.h*i+j;     bool1=1;     break;    }   }   if(bool1==1)    break;  } p=Gray2+start;  //*(Gray2+start)=(BYTE)0;  i--;j--;     //接着start的i,j继续循环

 if(Judge(globals,Gray+start+e))      //此时找到的是start的e  middle=start+e;  else if(Judge(globals,Gray+start+es))       middle=start+es;  else if(Judge(globals,Gray+start+s))       middle=start+s;  else if(Judge(globals,Gray+start+ws))       middle=start+ws;

    *(Gray2+middle)=(BYTE)0;         while(!finish)  {     //此处的算法和书上不一样，是我自己想的查找顺序   if(Judge(globals,Gray+middle+wn)&& *(Gray+middle+wn)==0 && *(Gray2+middle+wn)==255)         end=middle+wn;   else if(Judge(globals,Gray+middle+n)&& *(Gray+middle+n)==0 && *(Gray2+middle+n)==255)         end=middle+n;   else if(Judge(globals,Gray+middle+en)&& *(Gray+middle+en)==0 && *(Gray2+middle+en)==255)         end=middle+en;   else if(Judge(globals,Gray+middle+e) && *(Gray+middle+e)==0 && *(Gray2+middle+e)==255)      //此时找到的是middle的e    end=middle+e;       else if(Judge(globals,Gray+middle+es)&& *(Gray+middle+es)==0 && *(Gray2+middle+es)==255)         end=middle+es;   else if(Judge(globals,Gray+middle+s)&& *(Gray+middle+s)==0 && *(Gray2+middle+s)==255)         end=middle+s;   else if(Judge(globals,Gray+middle+ws)&& *(Gray+middle+ws)==0 && *(Gray2+middle+ws)==255)         end=middle+ws;      else if(Judge(globals,Gray+middle+w)&& *(Gray+middle+w)==0 && *(Gray2+middle+w)==255)         end=middle+w;         *(Gray2+end)=(BYTE)0;      if(Gray+start==Gray+end)    finish=true;   else    middle=end;  }

    memcpy(Gray, Gray2, filterSize);  return Gray;  

}