Overview: Overview of image hardcopy watermarking, text watermarking and color barcodes techniques.Present state-of-art techniques for hardcopy communication using printed modulation and codes.Provide examples,.This book presents covert, semi-covert and overt techniques for communication over printed media by modifying images, texts or barcodes within the document. Basic and advanced techniques are discussed aimed to modulate information into images, texts and barcodes..Conveying information over printed media can be useful for content authentication, author copyright, information and piracy p
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