Patent ID: 7952625
Filing Date: 2011-05-31
Classification: G01N,H04N

Abstract:
1. A calibration element for a camera being able to be directed to an object, having a thickness, said camera producing at least one image and having magnification ratios, being dependent on said object thickness said calibration element calibrating said magnification ratio of said camera, said calibration element having at least one calibration region, having a wall thickness therein, said calibration element is provided with at least one of a perforation or indentation in said calibration region which is detected by said camera, wherein in order to determine said magnification ratio dependence on said object thickness said calibration element having at least one support foot having a length, said length of said support foot is selected in such a way that by rotating said calibration element and setting it down on the at least one support foot a variation in said magnification ratio can be evaluated from said camera image, said length of said at least one support foot being at least twice as large as said wall thickness of said calibration element in said calibration region.