Question

我使用visual 2010（C ++）和opencv 2.3.1来构建使用MOG2进行背景扣除的代码。如完整代码here所示，它可以成功运行但噪音很大。

任何人都可以建议如何减少这种噪音。有人（感谢他）告诉我增加内核的大小而不是使用这种形态函数：

       void morphOps(Mat &thresh){

   Mat erodeElement = getStructuringElement( MORPH_RECT,Size(2,2)); //3x3
  Mat dilateElement = getStructuringElement( MORPH_RECT,Size(1,1)); //8x8

   erode(thresh,thresh,erodeElement);
   erode(thresh,thresh,erodeElement);


   dilate(thresh,thresh,dilateElement);
   dilate(thresh,thresh,dilateElement);

    }

但我真的不知道该怎么做，因为我还是初学者。另一个（感谢他）建议解决轮廓问题，如果你运行代码“两个提示。似乎你只是从许多轮廓中取一个点。尝试平均它们。另一个是随着时间的推移而潮湿。 damped_x = damped_x * 0.9 + real_x * 0.1; 此部分我不知道该怎么做。

你可以在下一节中看到包含轮廓的代码部分，我有意使用它来移动其他较小的对象，因为我已经使用了另一条指令来跟踪最大的对象（这不是一个好的选择，但我不能让它跟踪所有，所以我只是用blob绑定它们。）

    //Find contour  
   ContourImg = binaryImage.clone();  
  //less blob delete  
  vector< vector< Point> > contours;  

   findContours(ContourImg,  
    contours, // a vector of contours  
      CV_RETR_EXTERNAL, // retrieve the external contours  
      CV_CHAIN_APPROX_NONE); // all pixels of each contours  


  vector< Rect > output;  
  vector< vector< Point> >::iterator itc= contours.begin();  
   while (itc!=contours.end()) {  

  //Create bounding rect of object  
 //rect draw on origin image  
 Rect mr= boundingRect(Mat(*itc));  
 rectangle(frame, mr, CV_RGB(255,0,0));  
++itc;  
}

这是选择要跟踪的最大对象的指令：

    void searchForMovement(Mat binaryImage, Mat &framein){

 bool objectDetected = false;
 Mat temp;
 binaryImage.copyTo(temp);
vector< vector<Point> > contours;
vector<Vec4i> hierarchy;

findContours(temp,contours,hierarchy,CV_RETR_EXTERNAL,CV_CHAIN_APPROX_SIMPLE   );// retrieves external contours

//if contours vector is not empty, we have found some objects
if(contours.size()>0)objectDetected=true;
else objectDetected = false;

 if(objectDetected){
  //the largest contour is found at the end of the contours vector
  //we will simply assume that the biggest contour is the object we are   looking for.
   vector< vector<Point> > largestContourVec;
   largestContourVec.push_back(contours.at(contours.size()-1));
  //make a bounding rectangle around the largest contour then find its  centroid

    objectBoundingRectangle = boundingRect(largestContourVec.at(0));
   int xpos = objectBoundingRectangle.x+objectBoundingRectangle.width/2;
   int ypos = objectBoundingRectangle.y+objectBoundingRectangle.height/2;

   //update the objects positions by changing the 'theObject' array values
   theObject[0] = xpos , theObject[1] = ypos;
 }
//make some temp x and y variables so we dont have to type out so much
int x = theObject[0];
int y = theObject[1];

//draw some crosshairs around the object
circle(framein,Point(x,y),20,Scalar(0,255,0),2);
line(framein,Point(x,y),Point(x,y-25),Scalar(0,255,0),2);
line(framein,Point(x,y),Point(x,y+25),Scalar(0,255,0),2);
line(framein,Point(x,y),Point(x-25,y),Scalar(0,255,0),2);
line(framein,Point(x,y),Point(x+25,y),Scalar(0,255,0),2);

//write the position of the object to the screen
putText(framein,"Tracking object at (" +      intToString(x)+","+intToString(y)+")",Point(x,y),1,1,Scalar(255,0,0),2);
 file_ <<"X:"<<intToString(x)<<"  "<<"Y:"<<intToString(y)<<"\n";
 }

你们可以帮助我吗？提前致谢。

如何降低噪音并增强外观？

0 个答案: