Fig. 6
From: Euler diagrams drawn with ellipses area-proportionally (Edeap)
The unwanted region criterion. a Case 1 aims to remove unwanted region “a”, where there is a desired region “a b”. Ellipse \(e_a\) should be moved to be positioned inside ellipse \(e_b\) by penalising the area of region “a”. b Case 2 aims to remove unwanted region “a b” by inversely penalising the distance between of ellipses \(e_a\) and \(e_b\) while they overlap