MSER and param maxArea

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Hi, In this code program detect MSER region using different MSERParam giving as result 2D graph or 3D graph.

In first graph there is only one region with 8132 pixels. This region include level 153(4132 pixels ) and 163(4000 pixels ). In program maxArea is 5000. In this document maxArea is defined as :

//! prune the area which bigger than maxArea

It seems that this area is not the final area but "intermediate" area. Is it right?