1. A system for determining a property of a blur in an image, the system comprising: one or more receivers for receiving the image of an object-of-interest of a body, the image comprising the blur, and for receiving a further image of the object-of-interest that is a sharper image than the image with the blur, a determining subsystem for determining a value of a characteristic of the blur in the image on individual lines of a plurality of lines intersecting with the object-of-interest at different angles and extending in different directions, wherein the determining subsystem analyzes the image with the blur and the further image along the respective lines for determining the value of the characteristic of the blur in the image; and an obtaining subsystem for obtaining a direction in which the value of the characteristic of the blur is maximal, based on the determined values on the individual lines of the plurality of lines, which lines extend in different directions.