Abstract: A method of reading an optical code (20); is provided, the method comprising the steps of recording image data having the optical code (20); determining defects (30), and evaluating the image data by reading the code words. In this respect, the defects (30) are determined using an edge criterion and/or a binarization criterion, wherein the edge criterion evaluates whether there is a code module in an edge-free region of the image data that is larger than a specified multiple of the module size, and wherein the binarization criterion evaluates whether a code module having gray scale values close to a binarization threshold has been recorded.

Abstract: A method of reading an optical code (20); is provided, the method comprising the steps of recording image data having the optical code (20); determining defects (30), and evaluating the image data by reading the code words. In this respect, the defects (30) are determined using an edge criterion and/or a binarization criterion, wherein the edge criterion evaluates whether there is a code module in an edge-free region of the image data that is larger than a specified multiple of the module size, and wherein the binarization criterion evaluates whether a code module having gray scale values close to a binarization threshold has been recorded.

Abstract: A method for locating an optical code, on the basis of a finder pattern of the optical code, in an image having a plurality of pixels, the method comprising the steps of determining at least one candidate position for the finder pattern on the basis of edge transitions along at least one line through the image; determining a final position of the finder pattern in a vicinity of the candidate position; and verifying the final position, i.e. verifying that the image comprises the finder pattern in the final position, using a known property of the finder pattern.

Abstract: A method for locating an optical code, on the basis of a finder pattern of the optical code, in an image having a plurality of pixels, the method comprising the steps of determining at least one candidate position for the finder pattern on the basis of edge transitions along at least one line through the image; determining a final position of the finder pattern in a vicinity of the candidate position; and verifying the final position, i.e. verifying that the image comprises the finder pattern in the final position, using a known property of the finder pattern.