Fig. 5From: ATMAD: robust image analysis for Automatic Tissue MicroArray De-arrayingPair of concentric and coaxial ellipses. The outer ellipse Γ (red curve) has an area twice larger than the inner ellipse Γ′ (blue curve). These ellipses determine two domains of the same area : an elliptical outer ring (shown in light gray) and an elliptical inner core (dark gray)Back to article page