Illustration of the process of tracing a real arc in its image. The left panel shows the five p points used to compute the arc length. The right panel shows the high-intensity m points (dashed circles) used to find pmax for the same arc. The center and radius of curvature are determined as the circle containing the points p1,p2, and pmax = m2. The width is based on the line through the central point p3, whereas the asymmetric major-axes a1 and a2 are the lengths of the segments connecting m2 = pmax to the arc extremes p1 and p2.
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.