The Mueller Law Office, P.C.
Encoding method for generating a data-bearing halftone image, and decoding method for decoding the data-bearing image
An encoding system is for generating a data-bearing halftone image. The encoding system is configured to: convert a grayscale image into a halftone image having a plurality of image cells; select, from the halftone image, at least one of the image cells to be a carrier cell according to a set of reference dot patterns, the carrier cell having a dot pattern identical to one of the reference dot patterns; and generate a data-bearing halftone image by replacing the dot pattern of the carrier cell by a specified one of multiple encoding dot patterns of one of a plurality of the sets of encoding dot patterns each being associated with a code. The data-bearing halftone image is encoded with a code associated with the one of the sets of the encoding dot patterns.
National Taipei University of Technology
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Kai-Wen Yung-Yao Hsien-I
Chen Chen Lin