METHOD FOR WATERMARKING BARCODE

摘要

PURPOSE: A method for watermarking a barcode is provided to verify the authenticity of a returned article and to prevent the production of an imitation by embedding maker information, detailed information of the article, and imitation recognizing information in a barcode. CONSTITUTION: The method comprises steps of adjusting the size of a barcode image corresponding to the size of one or more pixels, transforming the size-adjusted barcode image by discrete cosine transformation, wavelet transformation, or discrete Fourier transformation, determining a transformation coefficient after the insertion of watermarks standing for the identification mark of a