STEGANOGRAPHY USING KARHUNEN-LOEVE TRANSFORM AND OPTIMUM PIXEL ADJUSTMENT

摘要

This paper proposes a novel technique for steganography by using Karhunen-Loeve transform (KLT) and Optimum Pixel Adjustment (OPA) procedure. Steganography is the practice of concealing messages or information within another non-secret data. There are various methods and techniques proposed tp implement it. This paper uses KLT because of its superiority over other transforms such as DCT and DFT. KLT provides the image compression and for hiding the data in the image, a simple LSB approach of Optimum Pixel Adjustment (OPA) procedure is used. The paper starts with discussing steganography, KLT and OPA. To implement the paper MATLAB is used because of its large database of built-in algorithms for image processing applications. In the end we take into consideration its advantages and disadvantages with an example.