LSB WATERMARKING THESIS

As a result, it keeps the distortion small between the marked and the original images. Experimental results show that the proposed method outperforms the existing reversible data hiding schemes reported in the literature. Robust watermarks are well suited for copyright protection because they stay intact with the image under various manipulations. Insurance companies, hospitals as well as patients might want to modify the medical images for a number of reasons. Welcome to Pakistan Research Repository

One of the examples is in the area of medical applications, where traditional diagnosis is being replaced by e-diagnosis. The tampered images may be used for illegal purposes. In the first part of this dissertation, we design a fragile watermarking system for the exact authentication of medical images. This paradigm gave birth to number of applications in healthcare industry like teleconsulting, telesurgery and telediagnosis. 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. We thus address the issue of tolerating affine transformations in medical images that is hardly be found in existing schemes of medical image watermarking. 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 to its pristine state.

In the first part of this dissertation, we design a fragile watermarking system for the exact authentication of medical images.

The scheme is completely blind, that it does not require the original image to detect the watermark. 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.

Please use this identifier to cite or link to this item: Watermarking tech- nology can be categorized into robust, fragile and semi-fragile watermarking, each serving for different purposes.

  DISSERTATION TITELSEITE LATEX

lsb watermarking thesis

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.

Consequently, it reduces the associated overhead htesis required in most of the reversible watermarking techniques. Show full item record. 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.

Digital Image Watermarking Using LSB Method – eTheses

In tyesis proposed method we firstly normalize the medical image using image moments in order to make it invariant against geometric transformations. Secondly, we select the salient regions in the normalized image based on feature points detected by Harris corner detector.

The proposed method uses integer wavelet theis and companding technique which can embed and recover the secret information as well as can restore the image to its pristine state.

Insurance companies, hospitals as well as patients might want to modify the medical images for a number of reasons.

Digital Image Watermarking Using LSB Method

As a result, it keeps the distortion small between the marked and the original images. In third part of the dissertation, we investigate the complete reversible watermarking system. Due to development of latest technologies in the areas of communication and computer networks, present businesses are moving to the digital world for effectiveness, convenience and security. Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

tesis

One of the examples is in the area of medical applications, where traditional diagnosis is being replaced by e-diagnosis. Welcome to Pakistan Research Repository Secondly it embeds watermark only in region of non interest RONIthus not compromising the diagnosis value of medical image.

  DPS RK PURAM HOLIDAY HOMEWORK 2013

However, digital form of medical image can easily be manipulated through watermarkijg processing softwares. Experimental results show that the proposed method outperforms the existing reversible data hiding schemes reported in the literature.

Watermarking is performed in Discrete Cosine Transform DCT domain of salient regions by adapting block based embedding. This paradigm gave birth to number of applications in healthcare industry like teleconsulting, telesurgery and telediagnosis.

Experimental results reveal lsbb the proposed system detects both legitimate and illegitimate distortions. The tampered images may be used for illegal purposes.

lsb watermarking thesis

The method takes advantage of block based watermarking and iterative optimization of threshold for companding, which avoids histogram pre and post-processing. The method utilizes the spatial domain watermarking and least significant bit LSB replacement method for embedding the watermark. 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.

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. The proposed system authenticates the computed tomography CT scan medical images of thorax area against different distortions.

lsb watermarking thesis

Robust watermarks are well suited for copyright protection because they stay intact with the image under various manipulations. Thesos thus address the issue of tolerating affine transformations in medical images that is hardly be found in existing schemes of medical image watermarking.

Author: admin