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Contents 1 Protection Options 1.1 Watermarking 1.1.1 Strengths 1.1.2 Weaknesses 1.2 Invisible Watermarks 1.2.1 Strengths 1.2.2 Weaknesses 1.3 Steganography 1.3.1 Strengths 1.3.2 Weaknesses 1.4 Services 1.4.1 Digimarc 1.5 Software

Protection Options

There different methods available for protecting copyrighted images, including watermarking, invisible watermarks and steganography. Each is explained below with their strengths and weaknesses.

A watermark is a recognizable image or pattern that appears lighter than the actual image and is used to discourage copying copyrighted images. Typically, the copyright information, name and year, are used as the watermark.

Strengths

Weaknesses

The biggest weakness of a watermark is that it can be digitally removed via cropping or other manipulation using graphics software.

Wikepedia define Digital watermarking as

"a technique which allows an individual to add hidden copyright notices or other verification messages to digital audio, video, or image signals and documents. Such hidden message is a group of bits describing information pertaining to the signal or to the author of the signal (name, place, etc.). The technique takes its name from watermarking of paper or money as a security measure. Digital watermarking is not a form of steganography, in which data is hidden in the message without the end user's knowledge, although some watermarking techniques have the steganographic feature of not being perceivable by the human eye."

Strengths

Weaknesses

Strengths

Weaknesses

Digimarc