Abstract
The fundamental objectives of image steganography algorithm are to simultaneously achieve high payload or embedding capacity, good visual imperceptibility and security. This paper presents a new approach to improve the embedding capacity and provide an imperceptible visual quality, a novel steganography method based on algorithm twenty five pixel value differencing and modified interval table (TFPVD). The cover image is made into 5×5 blocks that don’t overlap and TFPVD method with modified interval is used to embed and extract secret information. The results showed that the proposed TFPVD steganography algorithm has a higher steganographic capacity, which is 1,764 times that of the PBVD algorithm.
Highlights
New trends and rapid advances in the field of information technology have been very developed to communicate in the digital world can be done very quickly via the internet
Some of the goals of steganography are to increase the capacity of hidden bits, provide good visual imperceptibility and ensure safety of steganalysis
Wu and Tsai (2003) proposed a novel steganography method that uses the difference Pixel Value Differencing (PVD) between two pixel that embeds bits into pairs that have large PVD values, such as those found in edge areas
Summary
New trends and rapid advances in the field of information technology have been very developed to communicate in the digital world can be done very quickly via the internet. Wu and Tsai (2003) proposed a novel steganography method that uses the difference Pixel Value Differencing (PVD) between two pixel that embeds bits into pairs that have large PVD values, such as those found in edge areas. Wang et al (2008) uses modulus function beside two pixel value differencing, propose methods to avoid the problem of boundary values, where values are below or above the pixel values they should. To increase capacity and improve visual perception, (Khodaei and Faez, 2012) using PVD and LSB Subtitution, the proposed method is safe against RS detection attacks and steganalysis detectors using SPAM. The proposed scheme is to increase embedding capacity use Twenty Five Pixel difference and modified range table.
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