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c++opencvface-detection

how does "detectLargestObject" work, it's parameters in case of face detection

I have been working on Face detection using opencv, C++ Eclipse. I got some problem with a program which is as

Rect faceRect;    
// Stores the result of the detection, or -1.   
int scaledWidth = 320; // Shrink the image before detection.    
detectLargestObject(cameraImg, faceDetector, faceRect, scaledWidth);    
if (faceRect.width > 0)    
   cout << "We detected a face!" << endl;

I don't know what does these parameters indicate in case of "detectLargestObject". Specially, "faceRect". I need some help. Please guide me appropriately as I am new to OpenCV.

Solution

  • the code for the book is here: https://github.com/MasteringOpenCV/code