Figure 12. Outline of a Globorotalia menardii in side (keel) view and designations for morphometric parameters that can be extracted with MorphCol routines (Knappertsbusch 2004 and 2007). DeltaX=spiral height, DeltaY=axial width, Phi₁=upper keel angle, Phi₂=lower keel angle. Line 240 indicates the Y-position (in pixels) in a 640 x 480 pixel image with 256 grey levels, where outline extraction begins.