Journal ArticleDOI
Spread spectrum image steganography
TLDR
A new method of digital Steganography, entitled spread spectrum image steganography (SSIS), which hides and recovers a message of substantial length within digital imagery while maintaining the original image size and dynamic range.Abstract:
We present a new method of digital steganography, entitled spread spectrum image steganography (SSIS). Steganography, which means "covered writing" in Greek, is the science of communicating in a hidden manner. Following a discussion of steganographic communication theory and review of existing techniques, the new method, SSIS, is introduced. This system hides and recovers a message of substantial length within digital imagery while maintaining the original image size and dynamic range. The hidden message can be recovered using appropriate keys without any knowledge of the original image. Image restoration, error-control coding, and techniques similar to spread spectrum are described, and the performance of the system is illustrated. A message embedded by this method can be in the form of text, imagery, or any other digital signal. Applications for such a data-hiding scheme include in-band captioning, covert communication, image tamperproofing, authentication, embedded control, and revision tracking.read more
Citations
More filters
Patent
Information processing apparatus and method of controlling the same
Junichi Hayashi,Nobuhiro Tagashira,Kishi Kazuya,Yasuhiro Nakamoto,Yoshiharu Imamoto,Jun Tamaru +5 more
TL;DR: In this article, an order information calculation unit selects a pixel set including two or more pixels based on pixel values and information on an image space of image data of a captured image, and calculates an order of magnitude between pixels in the selected pixel set.
Journal ArticleDOI
Steganographic scheme for digital images using difference in neighbouring pixels
Ju-Yuan Hsiao,C.-T. Chang +1 more
TL;DR: In this article, the secret data bits content, the difference between the target pixel value and the mean of some neighbor pixel values, is used to determine how many secret data bit should be embedded in the target pixels.
Journal ArticleDOI
Direct Spread Spectrum Technology for Data Hiding in Audio
Alexandr Kuznetsov,Alexander Onikiychuk,Olga Peshkova,Tomasz Gancarczyk,Kornel Warwas,Ruslana Ziubina +5 more
TL;DR: The direct spread spectrum is investigated in the context of the development of methods for hiding data in audio containers, and various spreading sequences (chip codes) are considered and their use for hiding information in audio files is explored.
Proceedings ArticleDOI
Blend of error control codes in OFDM - effect of channel - a comparative approach
TL;DR: This paper deals with the comparative performance analysis of different modulation schemes using concatenated Error Control Codes (ECC) in OFDM(Orthogonal Frequency Division Multiplexing), using RS(Reed Solomon) codes with Convolutional codes has been used as the concatenation error control code.
Effect of Block Sizes on the Attributes of Watermarking Digital Images
TL;DR: The overall observation indicates that watermarked image gradually reduces in quality due to fading above 8 x 8 block size, and the block size 16 x 16 gives the best output result because it closely resembles the original image in terms of visual quality displayed.
References
More filters
Journal ArticleDOI
De-noising by soft-thresholding
TL;DR: The authors prove two results about this type of estimator that are unprecedented in several ways: with high probability f/spl circ/*/sub n/ is at least as smooth as f, in any of a wide variety of smoothness measures.
Book
Fundamentals of digital image processing
TL;DR: This chapter discusses two Dimensional Systems and Mathematical Preliminaries and their applications in Image Analysis and Computer Vision, as well as image reconstruction from Projections and image enhancement.
Journal ArticleDOI
Error bounds for convolutional codes and an asymptotically optimum decoding algorithm
TL;DR: The upper bound is obtained for a specific probabilistic nonsequential decoding algorithm which is shown to be asymptotically optimum for rates above R_{0} and whose performance bears certain similarities to that of sequential decoding algorithms.
Journal ArticleDOI
Secure spread spectrum watermarking for multimedia
TL;DR: It is argued that insertion of a watermark under this regime makes the watermark robust to signal processing operations and common geometric transformations provided that the original image is available and that it can be successfully registered against the transformed watermarked image.