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Face Mirroring, application for treatment of patients affected by facial paralysis


We developed for Hospital Universitari de Bellvitge (HUB) an application for the treatment of patients affected by facial paralysis. Our R&D team devised a system that, based on the ‘mirror technique’, uses a front camera that shows a ‘distorted’ face of the patient to help with the rehabilitation exercises. At the same time, this camera monitors several facial points in each session to assess the evolution of therapy.


Hospital Universitari de Bellvitge (HUB) (Opens in new window) is one of the 5 hospitals in Catalonia accredited as a third level hospital centre: the one with the highest complexity. It is a territorial tertiary reference centre for the entire South Catalunya axis, to Tierras del Ebro, and proximity and territorial reference hospital for the municipalities of L’Hospitalet and El Prat de Llobregat. It is a reference hospital in transplants, diagnostic imaging, cardiac, digestive and thoracic surgery, neurosurgery, ophthalmology and psychiatry. It has been awarded several times with the TOP20 award, which recognizes him as one of the best centres in Spain in the category of regional and national reference hospitals.

Pasiona - Aplicación para pacientes con parálisis facial



At the technical level, the challenges of mirror simulation and point tracking were solved thanks to OpenCV libraries. The system devised by Pasiona’s R&D team takes as a reference the ‘mirror technique’, a treatment traditionally applied to people who have suffered the loss of some limb. Thanks to this technique, the brain is ‘tricked’ by showing the patient in a distorted reflection image, with the visualization of the lost limb. The development of Face Mirroring was proposed following this idea: the software uses a web camera to duplicate the image of the face ‘falsifying’ it to the patient’s eyes, while monitoring the key points of the facial muscles with the aim of analyse the evaluation. The video recording is a plus so that the specialists in charge of the treatment can make a more exhaustive, specific and sustained analysis over time.



  • – OpenCV
  • – Node
  • – MongoDB
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