54 lines
1.4 KiB
C++
54 lines
1.4 KiB
C++
|
|
#include "opencv2/opencv.hpp"
|
|
#include "opencv2/videoio.hpp"
|
|
#include "opencv2/highgui.hpp"
|
|
|
|
const int FPS = 30;
|
|
|
|
|
|
bool isDiscardData = true;
|
|
int countDiscard = 0;
|
|
const int DISCARD_DURATION = 10;
|
|
|
|
int main() {
|
|
cv::VideoCapture cap;
|
|
cap.open(0);
|
|
cv::CascadeClassifier faceDetector;
|
|
if( !faceDetector.load("./haarcascade_frontalface_alt.xml"))
|
|
{
|
|
std::cerr << "[ERROR] Unable to load face cascade" << std::endl;
|
|
return -1;
|
|
};
|
|
cv::Rect foreheadROI;
|
|
if (!cap.isOpened()) {
|
|
std::cerr << "[ERROR] Unable to open camera!" << std::endl;
|
|
return -2;
|
|
}
|
|
|
|
while (true) {
|
|
if(isDiscardData){
|
|
countDiscard++;
|
|
if(countDiscard == DISCARD_DURATION*FPS)
|
|
isDiscardData = false;
|
|
}
|
|
else{
|
|
cv::Mat frame;
|
|
cap.read(frame);
|
|
if (frame.empty()) {
|
|
std::cerr << "[ERROR] blank frame grabbed" << std::endl;
|
|
break;
|
|
}
|
|
std::vector<cv::Rect> faceRectangles;
|
|
faceDetector.detectMultiScale(frame, faceRectangles, 1.1, 3, 0,cv::Size(20, 20));
|
|
foreheadROI = faceRectangles[0];
|
|
foreheadROI.height *= 0.3;
|
|
cv::rectangle(frame, faceRectangles[0], cv::Scalar(0, 0, 255), 1, 1, 0);
|
|
cv::rectangle(frame, foreheadROI, cv::Scalar(0, 255, 0), 1, 1, 0);
|
|
cv::imshow("Color", frame);
|
|
if (cv::waitKey(1000.0 / FPS) >= 0)
|
|
break;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|