DONE BY S.MURALIRAJAN M.NIRMAL AN ADPATIVE DIGITAL IMAGE WATERMARKING TECHIQUE FOR COPYRIGHT PROTECTION DONE BY S.MURALIRAJAN M.NIRMAL

objective The aim of this project is to give copyright protection for the host images which used in the Internet. software used for Implementation of this project is Matlab 6.0.

synopsis Digital watermarking technique is proposed for copyright protection for ownership identification of digital media such as audio, image, video or text A digital signature or digital watermark is embedded in the media such that it is perceptually undetectable It means that the normal visual of the host and watermarked image are same when it is seen by the user and it can’t be differentiated .

The applied technique is robust technique because the watermark never get changed even When the watermarked image is low pass filtered, compressed, processed, edited or converted digital to analog & analog to digital. When compared to other techniques the digital watermarking technique implements a more secured copyright protected system.

INTRODUCTION Digital watermarking is a technology for embedding various types content of information in digital content. A digital watermark is a digital signature or pattern inserted into digital image

Need for digital watermaking Internet boom is one of the main reason All the information handled on the internet is provided as digital content It can be easily copied and produced in large quantities The copied content is indistinguishable to the original content The original can be easily found out by using digital watermarking

Spatial domain watermaking Transform domain watermarking Embedding techniques Spatial domain watermaking Transform domain watermarking

About spatial watermarking In this project we are using spatial watermarking. In this method the values are directly added to the MSB of the pixel. In this technique we can’t determine the existence of watermark by human visual inspection and double encryption scheme.

TYPES OF DIGITAL WATER MARKING TECHNIQUES TEXT IMAGE WATERMARKING IMAGE WATERMARKING AUDIO WATERMARKING VIDEO WATERMARKING

Structure of digital watermarking Embedding

Detecting watermark

Block Diagram

advantages of used techiques Spatial domain techniques Added in MSB secret key Pseduo random number Random selected pixels

Properties of digital watermarking Persistence Robustness Unobtrusiveness decodability

Disadvantages of existing techiques Frequency domain techniques Dct,fourier,wavelet transform Affect imaging processing Low pass filtering and compression Distortion to human eyes

Comparative technologies Digital fingerprinting Public key encryption

Methods of attack in digital watermarking Compression Rotation Cropping Filtering

Who protects images? Photographers Artists Stock photo agencies Models Parents Illustrators Catalog owners

Applications of digital watermarking Advertisement verification Broadcasting Distribution Contents id and archive Mastering Remote control and triggering

conclusion In this project we are proposed an adapative image watermarking algorithm .The experimental results show that proposed algorithm is robust to common image operations such as low-pass filtering and jpeg image compression.

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