LSB WATERMARKING THESIS

However, digital form of medical image can easily be manipulated through image processing softwares. In order to facilitate sharing and remote handling of medical images, we propose techniques to solve the problem of copyright protection and content authentication using robust and fragile watermarking respectively. Insurance companies, hospitals as well as patients might want to modify the medical images for a number of reasons. Robust watermarks are well suited for copyright protection because they stay intact with the image under various manipulations. In the first part of this dissertation, we design a fragile watermarking system for the exact authentication of medical images. Experimental results show that the proposed method outperforms the existing reversible data hiding schemes reported in the literature.

In the proposed method we firstly normalize the medical image using image moments in order to make it invariant against geometric transformations. The scheme is completely blind, that it does not require the original image to detect the watermark. Watermarking is performed in Discrete Cosine Transform DCT domain of salient regions by adapting block based embedding. Watermarking tech- nology can be categorized into robust, fragile and semi-fragile watermarking, each serving for different purposes. The method utilizes the spatial domain watermarking and least significant bit LSB replacement method for embedding the watermark.

In the proposed method we firstly normalize the medical image using image moments in order to make it invariant against geometric transformations.

The tampered images may tjesis used for illegal purposes. One of the examples is in the area of medical applications, where traditional diagnosis is being replaced by e-diagnosis.

The system first enhances the embedding capacity of a CT scan image by isolating the actual lung parenchyma unlike classical watermarking techniques, which use logical square or ellipse for isolating region of interest ROI.

Digital Image Watermarking Using LSB Method

Robust watermarks are well suited for copyright protection because they stay intact with the image under various manipulations. The method utilizes the spatial domain watermarking and least significant bit LSB replacement method for embedding the watermark.

  KUTZTOWN ESSAY PROMPT

In third part of the dissertation, we investigate the complete reversible watermarking system. However, digital form of medical image can easily be manipulated through image processing softwares. Experimental results show that the proposed method outperforms the existing reversible data hiding schemes reported in the literature. Welcome to Pakistan Research Repository Due to development watermarkinng latest technologies in the areas of communication and tnesis networks, present businesses watfrmarking moving to the digital world for effectiveness, convenience and security.

We thus address the issue of tolerating affine transformations in medical images that is hardly be found in existing schemes of medical image watermarking.

Please use this identifier to cite or link to this item: Insurance companies, hospitals as well as patients might want to modify the medical images for a number of reasons. Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

lsb watermarking thesis

Consequently, it reduces the associated overhead usually required in most of the reversible watermarking techniques. Watermarking tech- nology watermarkjng be categorized into robust, fragile and semi-fragile watermarking, each serving for different purposes. The objective of this dissertation is to investigate how to protect a medical images, detect tampered images and recover the original image using the technique of Digital Watermarking.

The proposed system authenticates the computed tomography CT scan medical images of thorax area against different distortions. The scheme is completely blind, that it does not require the original image to detect the watermark. Secondly, we thesid the salient regions in the normalized image based on feature points detected by Harris corner detector.

  FOXCROFT ESSAY COMPETITION

Watermarking is performed in Discrete Cosine Transform DCT domain of salient regions by adapting block based embedding. Show full item record.

lsb watermarking thesis

Secondly it embeds watermark only in region of non interest RONIthus not compromising the diagnosis value of medical image. In the first part of this dissertation, we design a fragile watermarking system for the exact authentication of medical images. In the second part of the dissertation, we investigate an approach of robust watermarking for protection of medical images which ensures the security of medical images against geomet- rical distortions.

This paradigm gave birth to number of applications in healthcare industry like teleconsulting, telesurgery and telediagnosis. watermarkong

Digital Image Watermarking Using LSB Method – eTheses

The proposed method uses integer wavelet transform and companding technique which can embed and recover the secret information as well as can restore the image watermarrking its pristine state. The method takes advantage of block based watermarking and iterative optimization of threshold watemrarking companding, which avoids histogram pre and post-processing. All these applications require the exchange of medical images in digital format from one geographical location to another throughout the globe via a cheap and fast network such as Internet.

As a result, it keeps the distortion small between the marked and the original images. In order to facilitate sharing and remote handling of medical images, we watermarkin techniques to solve the problem of copyright protection and content authentication using robust and fragile watermarking respectively. Experimental results reveal that the proposed system detects both legitimate and illegitimate distortions.

lsb watermarking thesis