Added normalisation of the signal

ppg.cpp

@@ -89,6 +89,15 @@ int main(){
 				isBufferFull = true;
 				}
 			}
+
+			//Normalisation of our signal
+			std::vector<double> greenSignalNormalized; 
+			cv::Scalar mean, stddev;
+			cv::meanStdDev(greenSignal, mean, stddev);
+			for (int l_sample=0; l_sample < FPS*BUFFER_DURATION; l_sample++)
+			{
+				greenSignalNormalized.push_back((greenSignal.at<double>(0, l_sample)-mean))
+			}
 		}
 	}	
 }