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Describes a variety of coding, reading, processing and optical techniques available for non‐standard identification problems associated with the marking and reading of products. Techniques covered are vision processing systems to enhance the application of barcodes, optical character reading, and the use of dotcodes. Outlines the advantages of dotcodes and concludes that the combination of a tv‐camera, balanced illumination and an intelligent vision processor allows creative solutions for identification, product recognition, quality control, measuring and positioning.