METHOD AND DEVICE FOR RECOGNISING AND ANALYSING SURFACE DEFECTS IN THREE-DIMENSIONAL OBJECTS HAVING A REFLECTIVE SURFACE, IN PARTICULAR MOTOR VEHICLE BODIES

摘要

The present invention relates to a method for recognising and analysing surface defects (OF) in three-dimensional objects (5) having a reflective surface (51), in particular motor vehicle bodies, in which method the surface defects (OF) are identified using the evaluation of at least one image, recorded by at least one camera (3) in the form of a raster image of pixels, of an illumination pattern (21) projected by at least one first illumination device (2) onto at least one part of the surface (51) using a two-dimensional raster coordinate system. The invention also relates to a device (1) therefor. The invention advantageously allows surface defects (OF) to be identified exclusively using two-dimensional image information with the aid of image processing algorithms without the need for "environmental parameters", and complex geometric calculations can advantageously be omitted. As a result, the solution according to the invention is fast and robust and can be carried out using differently designed first illumination devices (2), which makes it suitable in particular for mobile applications, for example as a hand-held module. It is also made possible for the method according to the invention to be optimised by a "deep learning" strategy.