step 4

ppg.cpp

@@ -2,7 +2,12 @@
 #include "opencv2/videoio.hpp"
 #include "opencv2/highgui.hpp"
 
-const int FPS = 15;
+const int FPS = 30;
+
+
+bool isDiscardData = true;
+int countDiscard = 0;
+const int DISCARD_DURATION = 10;
 
 int main() {
   cv::VideoCapture cap;
@@ -14,19 +19,22 @@ int main() {
   }
 
   while (true) {
-    // create a matrix to store the image from the cam
-    cv::Mat frame;
-    // wait for a new frame from camera and store it into 'frame'
-    cap.read(frame);
-    // check if we succeeded
-    if (frame.empty()) {
-      std::cerr << "[ERROR] blank frame grabbed" << std::endl;
-      break;
+    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;
+       }
+       cv::imshow("Color", frame);
+       if (cv::waitKey(1000.0 / FPS) >= 0)
+           break;
+       }
     }
-    cv::imshow("Color", frame);
-    if (cv::waitKey(1000.0 / FPS) >= 0)
-      break;
-  }
-
-  return 0;
+    return 0;
 }