1. A system for segmenting one or more objects in a subject image resulting from subjecting one or more objects to imaging using an imaging apparatus, comprising: an object border detector configured to identify merely border outlines of one or more respective objects in a subject image; a geometric difference component configured to generate geometric differences of the identified object borders from a subject image; and an object segmentor ( 206 ) configured to identify one or more transitions between two or more objects in the subject image using the geometric differences.