\subsubsection parameters ROS parameters

Reads and maintains the following parameters on the ROS server

- \b "~threshold" : \b [int] Input image threshold min: 0, default: 127, max: 255
- \b "~nb_epochs" : \b [int] Nb of epochs per frame min: 1, default: 1, max: 50
- \b "~target" : \b [double] Target (GNG-T) min: 0.0, default: 1.0, max: 50.0
- \b "~evolution_algo" : \b [int] Select the kind of evolution for adjusting the graph size. min: 0, default: 0, max: 1
- \b "~max_samples" : \b [int] Maximal number of samples considered min: 100, default: 1000, max: 10000
- \b "~max_dist" : \b [double] Maximal edge length within a component min: 0.0, default: 0.1, max: 1.0

