Past detection results remain

[cedar-field]

Thank you authors for creating useful python wrapper for STag.
I found stag.Detector keep past detection results.
I tried to use this class to process videos (multiple frames), but the dec.getContours() function seems to return all past results even after new frame is processed.
I solved this issue by adding markers.clear() in detectMarkers function and rebuild, but if there are some better solution please teach me.

int Stag::detectMarkers(Mat inImage) {
  markers.clear(); // added sentence
  image = inImage;
  // ...
}