OSEA-4-Java

This is a Java Port of the software OSEA which was developed by Patrick S. Hamilton from EP Limited. The original source code was written in C. This project contains the code rewritten in Java. The software is capable of QRS-Detection and QRS-Classification.

License

This project is licensed under the terms of the MIT license. See license.txt.

Version

1.0.0: OSEA source code rewritten in Java - based on OSEA Release 1.3 (9/19/2002)

OSEA

OSEA is an Open Source ECG Analysis software. The software was originally developed by Patrick S. Hamilton from EP Limited and can be downloaded at their [website] (http://www.eplimited.com/software.htm). For more information about OSEA see [the documentation of OSEA] (http://www.eplimited.com/osea13.pdf).

OSEA-4-Java

OSEA-4-Java is the result of the source code from OSEA rewritten in Java.

Usage

This project contains functionality for QRS-Detection and QRS-Classification. The detectors/classifiers are having internal state about the last ecgSamples. To reset this state create a new instance with the factory. Therefore for every detection/classification of ecgSamples an own object has to be used.

QRS-Detection

int sampleRate = ... ;
int[] ecgSamples = ... ;

QRSDetector2 qrsDetector = OSEAFactory.createQRSDetector2(sampleRate);
for (int i = 0; i < ecgSamples.length; i++) {
  int result = qrsDetector.QRSDet(ecgSamples[i]);
  if (result != 0) {
    System.out.println("A QRS-Complex was detected at sample: " + (i-result));
  }
}

QRS-Classification

int sampleRate = ... ;
int[] ecgSamples = ... ;

BeatDetectionAndClassification bdac = OSEAFactory.createBDAC(sampleRate, sampleRate/2);
for (int i = 0; i < ecgSamples.length; i++) {
  BeatDetectAndClassifyResult result = bdac.BeatDetectAndClassify(ecgSamples[i]);
  if (result.samplesSinceRWaveIfSuccess != 0) {
    int qrsPosition =  i - result.samplesSinceRWaveIfSuccess;
    if (result.beatType == ECGCODES.UNKNOWN) {
      System.out.println("A unknown beat type was detected at sample: " + qrsPosition);
    } else if (result.beatType == ECGCODES.NORMAL) {
      System.out.println("A normal beat type was detected at sample: " + qrsPosition);
    } else if (result.beatType == ECGCODES.PVC) {
      System.out.println("A premature ventricular contraction was detected at sample: " + qrsPosition);
    }
  }
}