Patent ID: 8360316

Claim:
An apparatus for the taking of undistorted images of a surface of objects moved on a conveying device, comprising: a geometry detection sensor configured to detect a geometry of the objects with reference to at least one of spacing data and remission behavior of the objects; a line sensor configured to scan the objects linewise for the generation of image data of the surface in a linear reading window which forms an angle with the conveying direction; and a control configured: to extrapolate spacing profiles in lines in an environment of an object from spacing profiles of the object margin to allow a soft transition; to generate, on the basis of geometrical data of the geometry detection sensor, a respective spacing profile of the surface over the reading window from the perspective of the line sensor and to vary a taking frequency for the line sensor from each spacing profile according to the geometry of the objects as taken from the perspective of the line sensor; to set the line sensor to the associated taking frequency for the respective line of the objects to be scanned; and to compose the image data thus taken linewise in an undistorted manner to form a uniformly resolved total image of the surface.