Discover NaviLens

The cutting edge technology for the visually impaired

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A brand-new system of BIDI codes

Pedro using NaviLens in the office

The application is based on a novel system of artificial markers, which combines high density (multitude of combinations) with long range (a 20cm wide marker is detected up to 12 meters away).

In addition, the detection algorithm could read multiple markers at the same time, at high speed and even in full motion.

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100% user friendly interface for the visually impaired

Navilens interface



Reading markers with NaviLens is almost instantaneous.


Capable of reading the labels from long distances, depending on the size of the marker.


No need for focusing, which is essential for people with visual impairments.


Navilens algorithm detects the tags when the user is walking or in motion while the cell phone is pointed up.


Navilens accurately detects the distance between the user and the tags. In addition, NaviLens provides the relative angle of the user with respect to the tag.


It detects multiple tags simultaneously, efficiently communicating them to the user

See for yourself!

This is how NaviLens can help the visually impaired. Bellow discover the testimonials of the first users

Where is NaviLens?

Public Transport System of the city of Barcelona: underground and bus

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NaviLens was given the prestigious award Connecting for Good by the Vodafone Foundation

everis foundation

everis Awards
Winner 2018

Fundación Vodafone

Connecting for Good
Winner 2017

La Verdad Multimedia

Mejor App
Winner 2018

La Opinión

Premio Enterprise 4.0 a la transformación digital
Winner 2018


Empresa TIC de la Región
Winner 2018

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Here is a brief summary of the most frequently asked questions posted by users

NaviLens is a new integral system of artificial markers based on Computer Vision. It allows to read at a great distance the special signs displayed in an environment, to be oriented towards them and to obtain detailed information associated to said indications in a way equivalent to how the normal signaling would read a person with full visual capacity. To do this, the marker recognition algorithm is complemented by a novel 3D sound system that, without the need for headphones, informs the user of the position, distance and orientation of the marker. It allows a person with visual impairment to have full autonomy of movement inside unknown spaces in equal conditions as a person who can see.

NaviLens consists of a web application with which tags are designed and managed and a mobile client to read them (for iOS and Android). The application is fully accessible: Graphic elements of large size and high contrast. Special care has been taken in the integration with TalkBack and Voice Over, the interfaces that people with visual impairities use to interact with their phone. It also has a unique 3D Sonification System, which does not require headphones (which is important so as not to deprive the blind user of hearing) in order to make the completely blind user perceive the position and orientation of the marker.

The interface of NaviLens is very simple. It consists of a main panel where the captured tags and four buttons appear. The panel shows the tags in the reverse order in which they are captured.
  • Settings - Here you can modify both the location mode and the additional message information.
  • Flash - Activates or deactivates the flash for low light environments.
  • Zoom - Use the zoom to capture labels at twice the distance.
  • About - Information about the authors and help.

The complete NaviLens system is available in 8 languages ​​(English, French, Italian, German, Spanish, Portuguese, Turkish & Japanese, so that each user receives the information contained in the signage in their own language.) We are currently working to incorporate the languages ​​requested by our users. You can leave us your suggestion at

NaviLens is developed by the Mobile Vision Research Lab of the University of Alicante and Neosistec. For any questions, comments or suggestions you can contact us at

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