In an information embedding apparatus, an image selecting unit selects original image data from an original image data group, a decoder detects a code from the selected original image data, and a candidate code determining unit calculates a candidate code. A candidate code embedding unit embeds the candidate...http://www.google.de/patents/US7634105?utm_source=gb-gplus-sharePatent US7634105 - Method and apparatus for embedding information in imaged data, printed material, and computer product
