Free Access

Fig. 11


Relative error in NSB calculation for one image of subset 1 derived from Rome/PSPT observation taken on 21/08/2000 shown in Fig. 7 S1/1. The NSB was derived with our method and running window median filter width of a) R/ 2, b) R/ 4, c) R/ 13, and d) R/ 20 pixels. Also shown are the values of the rms, mean, mean absolute, and maximum relative differences by comparing image regions within 0.98 R. The colour bars apply to the images below them.

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.