Free Access

Fig. 1.


Histogram counting 1004 VIs from the Sentry database (4 Apr 2020) function of their current observed arc. The last two bins are much larger, to fit the best observed objects on the same plot.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.