1. A method comprising: using at least one processor and memory for: representing, in a rectangular domain, an image including a feature of interest; determining a point within the feature of interest; transforming the image of the feature from the rectangular domain to a quasi-polar domain based on the point, the quasi-polar domain being represented as a graph of nodes connected together by edges; and graph cutting the quasi-polar domain to identify the boundary of the feature of interest in the image.