Patent ID: 7375806

Claim:
Method for inspecting the quality criteria of flat textile structures embodied in a multi-layer form according to a contour, in particular woven, stitched, knitted, sewn or non-woven finished structures, including cut areas or holes, separated or forming a material web, said structures being used for airbags, carried out using image-forming inspection means, in particular optical inspection means, including a CCD array camera or a linear array camera, wherein a relative motion is produced between the structures to be inspected and the camera, and the structure is arranged at least by area at a defined distance from the image-forming inspection means preferably on a substantially flat surface of a control table or inspection line or led past the field of view of the camera at a defined distance by a roller, comprising the following steps: recording the structure using the camera, and saving or buffering the image data captured; segmenting the image data captured based on the texture differences distinguishable in the image; determining segment characteristics for the individual image segments such as segment center of gravity-segment area-segment main axis and/or localized rectangles or the like, on the basis of which a distinctive system of coordinates for the structure and corresponding structures of the same type can be defined which is invariant relative the torsion, reflection, stretching, compression and deformation of the structure, said system of coordinates allowing a definition of measuring points to be made.