Method for Identifying Objects and Object Identification System

A method for identifying objects using an object identification system, comprising:

• recording an image of an object to be identified by an image recording unit;
• teaching a respective pattern of the object to be identified to the object processing system in the form of a pattern edge image formed from edge points;
• and
• comparing edge points in the recorded image with edge points of the pattern edge image for a match of a relevant pattern, wherein an overall quality value is determined as a measure of the correspondence between the object and the pattern, wherein
• an association with lines in the pattern is then determined for the edge points of the pattern by finding edge points with essentially the same orientation, and that an edge point in the recorded image is assessed as belonging to an object that corresponds to the pattern if a predetermined number of neighboring edge points adjacent to the relevant edge point have an orientation that essentially corresponds to the orientation of a line in the pattern.

An object identification system, comprising:

• an image recording unit that records pattern images and object images;
• and
• an image processing unit that receives the recorded image and creates edge images from the recorded pattern images and object images,
• wherein at least one pattern of an object to be searched for a recorded image in the form of an edge image comprising edge points is taught for a comparison with edge points in the recorded image, through which an overall quality value for a correspondence between the object and the pattern is determined.

A computer program product for use in an object identification system having an image recording unit that records a pattern and object images and with an image processing unit that creates an edge image from the recorded pattern and object images, with at least one pattern of an object to be searched for in the form of an edge image comprising edge points learned in the object identification system, comprising:

• a plurality of computer code sequences stored for execution in a digital computer, comprising
• storing a recorded image of a of an object to be identified by the image recording unit,
• determining a respective pattern of the object to be identified to the object processing system in the form of a pattern edge image formed from edge points, and
• comparing edge points in the recorded image with edge points of the pattern edge image for a match of a relevant pattern, wherein an overall quality value is determined as a measure of the correspondence between the object and the pattern, wherein
• an association with lines in the pattern is then determined for the edge points of the pattern by finding edge points with essentially the same orientation, and that an edge point in the recorded image is assessed as belonging to an object that corresponds to the pattern if a predetermined number of neighboring edge points adjacent to the relevant edge point have an orientation that essentially corresponds to the orientation of a line in the pattern.