Digital Watermarking
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Transcript of Digital Watermarking
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DIGITAL WATERMARKING
By Ch.Vinay kumar (10U31A0413)
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AGENDA:WHAT IS DIGITAL WATER MARKING?WHY IS IT?WHY TO USE IT?PROPERTIESCLASSIFICATIONSGENERAL WATERMARKING SYSTEMDIGITAL WATERMARKING TECHNIQUESADVANTAGESDISADVANTAGESAPPLICATIONSCONCLUSIONBIBILOGRAPHY
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What is Digital Watermarking?
Digital watermarking is a technique for inserting information (the watermark) into an image, which can be later extracted or detected for variety of purposes including identification and authentication purposes.
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Why IS it?
Why because It describes methods and technology that allow to hide information.
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PROPERTIES:
ROBUSTNESS
PERCEPTUAL TRANSPARENCY
CAPACITY
COMPLEXITY
SECURITY
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CLASSIFICATION:
PERCEPTIABLE WATERMARKS & IMPERCEPTIABLE
ROBUST & FRAGILE
PUBLIC & PRIVATE
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WATER MARKING SYSTEM:
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DIGITAL WATERMARKING TECHNIQUES:
The techniques which are used to put digital watermarks onto the digital media are called as digital watermark techniques. They are: 1) Image domain encoding
2)Transform domain3)Masking
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ADVANTAGES:
Embedded water mark is easy
Implementation on pc platform is possible
Uniquely identifies author
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DISADVANTAGES:
Resizing,compression and converting images from one file to another may add noise to an image.Some watermarks vanish if some one manipulates the image in a program like photoshop .
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APPLICATIONS:
Military applications: * Intelligence activities *Traitor tracing *Image tampering detection
Civilian applications: * Intelligent web browsers *Copy right protection of digital media in hard copy
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CONCLUSION:
The large need of networked multimedia system has created the need of copy right protection .so, it is very important to protect intellectual properties of digital media . For this DIGITAL WATERMARKING is the great solution for the protection of legal rights of digital content.
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BIBILOGRAPHY:
www.utd.edu/~bxt043000/cs4398_f7 http://cs.uccs.edu/~sasummer/cs591/SpreadSpectrum http://www-scf.usc.edu/~csci530l/slides/lab-steganography.p
df http://www.securityfocus.com/infocus/1684 http://www.garykessler.net/library/steganography.html http://home.comcast.net/~ebm.md/stego.html
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THANK YOU
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QUERIES ??