1. A method for extracting a radial contour around a given point in an image, comprising: providing an image including a point about which a radial contour is to be extracted around; providing a plurality of directions around the point; for each direction, providing a plurality of radius lengths; determining local costs for all radius lengths for each direction by comparing texture variances at each radius length with the texture variance at a further radius length; and determining a radius length, using a processor, for each direction based on the accumulated value of the local costs to provide a radial contour.