Recognize service does not assign probabilities

[LarsJanssenTUe]

trafficstars

During the debugging some extra loggers were added (as can be seen) and eventually it was found that the recognize service:

self._recognize_srv = self.create_service_client('/' + robot_name + '/face_recognition/recognize', Recognize)

does not produce probabilities, therefore resulting in the following set of events:

[INFO][/state_machine][1556022471.898666]: getting one image...
[INFO][/state_machine][1556022471.898999]: self._camera_last_image: None
[INFO][/state_machine][1556022471.933521]: len(self._camera_last_image): 921600
[INFO][/state_machine][1556022471.933880]: got 921600 bytes of image data
[INFO][/hero/face_recognition/face_recognition][1556022472.172789]: Face recognitions: [RecognizedFace(roi=(474, 189, 127, 149), l2_distances=[])]
[INFO][/state_machine][1556022472.177438]: recognize service recognitions: 
  - 
    categorical_distribution: 
      probabilities: []
      unknown_probability: 0.0
    roi: 
      x_offset: 474
      y_offset: 189
      height: 149
      width: 127
      do_rectify: False
    group_id: 0
[INFO][/state_machine][1556022472.177817]: found 1 face(s) in the image
[INFO][/state_machine][1556022472.178329]: Probability threshold 1.50
[INFO][/state_machine][1556022472.178566]: 0: []
[INFO][/state_machine][1556022472.178850]: raw_detections = [categorical_distribution: 
  probabilities: []
  unknown_probability: 0.0
roi: 
  x_offset: 474
  y_offset: 189
  height: 149
  width: 127
  do_rectify: False
group_id: 0]
[INFO][/state_machine][1556022472.179074]: best_detection = None