IMAGE ANALYSIS SYSTEM & METHOD

Among other things, a method is disclosed comprising: receiving image data representing an image; processing the data to generate orientation information; processing the data using the orientation information to measure a quantity called local phase in a direction perpendicular to the orientation of a putative vessel; using the phase measurements from three collinear image locations or from two locations to detect the centerline of a symmetric image structure, such as a blood vessel, and to locate a center-point defined by the intersection of the centerline with the line created by the measurement locations.