我在 OpenCV(C++ 中)中有一个代码,它使用“haarcascade_mcs_upperbody.xml”来检测上身。它检测单个上身。我怎样才能让它检测到多个上半身。我认为 CV_HAAR_FIND_BIGGEST_OBJECT 只检测到最大的物体。但我不知道如何解决这个问题
代码如下:
int main(int argc, const char** argv)
{
CascadeClassifier body_cascade;
body_cascade.load("haarcascade_mcs_upperbody.xml");
VideoCapture captureDevice;
captureDevice.open(0);
Mat captureFrame;
Mat grayscaleFrame;
namedWindow("outputCapture", 1);
//create a loop to capture and find faces
while(true)
{
//capture a new image frame
captureDevice>>captureFrame;
//convert captured image to gray scale and equalize
cvtColor(captureFrame, grayscaleFrame, CV_BGR2GRAY);
equalizeHist(grayscaleFrame, grayscaleFrame);
//create a vector array to store the face found
std::vector<Rect> bodies;
//find faces and store them in the vector array
body_cascade.detectMultiScale(grayscaleFrame, faces, 1.1, 3,
CV_HAAR_FIND_BIGGEST_OBJECT|CV_HAAR_SCALE_IMAGE, Size(30,30));
//draw a rectangle for all found faces in the vector array on the original image
for(int i = 0; i < faces.size(); i++)
{
Point pt1(bodies[i].x + bodies[i].width, bodies[i].y + bodies[i].height);
Point pt2(bodies[i].x, bodies[i].y);
rectangle(captureFrame, pt1, pt2, cvScalar(0, 255, 0, 0), 1, 8, 0);
}
//print the output
imshow("outputCapture", captureFrame);
//pause for 33ms
waitKey(33);
}
return 0;
}