1. INTRODUCTION



1.1 INTRODUCTION

Since the rise of the Internet one of the most important factors of information technology and communication has been the security of information. Cryptography was created as a technique for encrypt and decrypt data in order to keep the message secret. Unfortunately it is sometimes not enough to keep the contents of a message secret, it may also be necessary to keep the existence of the message secret. The technique used to implement this, is called steganography.

Steganography is the ....etc

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An image defined in the real world is considered to be a function of two real variables say x,y.
Before going to processing an image, it is converted into a digital form. Digitization includes sampling of image and quantization of sampled values.
After converting the image into bit information, processing is performed.
This processing technique may be,
Image enhancement
Image reconstruction
Image compression
Image enhancement refers to accentuation, or sharpening, of image features such as boundaries.
Image restoration is con ....etc

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PLZ SEND ME THE PPT AND REPORT FOR DISCRETE WAVELET TRANSFORM-BASED SATELLITE IMAGE RESOLUTION ENHANACEMENT


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image detail enhancement using a dictionary technique

Abstract

We present a novel approach to detail enhancement using a dictionary-based technique. For each low-resolution input image patch, we seek a sparse representation from an over-complete dictionary and use that to estimate the high-resolution patch. We modify an existing dictionary-based super-resolution method in several ways to achieve enhancement of fine detail without introduction of new artifacts. These modifications include adaptive enhancement of reconstructed detail patches ba ....etc

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Image Steganography Schemes For Image Authentication And Verification



STEGANOGRAPHY DEFINED

The word steganography is derived from the Greek words stegos meaning cover and grafia meaning writing defining it as covered writing.
There exist two types of materials in steganography: message and carrier. Message is the secret data that should be hidden and carrier is the material that takes the message in it.

TEXT STEGANOGRAPHY

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get ppt on controlled data hiding technique for color image authentication in frequency domain
ppt on controlled data hiding technique for color image authentication in frequency domain ....etc

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