http://romisatriawahono.net/lecture/rm/survey/computer%20vision/Subhedar%20-%20Image%20Steganography%20-%202014.pdf

Current status and key issues in image steganography

Comprehensive Survey of Image Steganography: Techniques, Evaluations, and Trends in Future Research

The illegal distribution of a digital movie is a common and significant threat to the film industry. With the advent of high-speed broadband Internet access, a pirated copy of a digital video can now be easily distributed to a global audience. A possible means of limiting this type of digital theft is digital video watermarking whereby additional information, called a watermark, is embedded in the host video. This watermark can be extracted at the decoder and used to determine whether the video content is watermarked. This paper presents a review of the digital video watermarking techniques in which their applications, challenges, and important properties are discussed, and categorizes them based on the domain in which they embed the watermark. It then provides an overview of a few emerging innovative solutions using watermarks. Protecting a 3D video by watermarking is an emerging area of research. The relevant 3D video watermarking techniques in the literature are classified based on the image-based representations of a 3D video in stereoscopic, depth-image-based rendering, and multi-view video watermarking. We discuss each technique, and then present a survey of the literature. Finally, we provide a summary of this paper and propose some future research directions.

An Overview of Digital Video Watermarking

The advances in photonic device technologies are bringing ultra-high-bit-rate networking-at speeds towards 100 Gb/s and beyond-much closer to practical reality. It is increasingly likely that in the longer term ultrafast optical time-division techniques-together with wavelength multiplexing-will be used in networks at all levels, from the transcontinental backbone to the desktop. Examples of devices include a subpicosecond clock source packaged inside a laptop personal computer and an OTDM switch on a single semiconductor chip, both produced at HHI. Advances similar to these make it possible now to envisage the use of OTDM techniques, not just in the highest layers of national and international networks, but also much closer to the user-such as the world-first demonstrations at BT Laboratories of a 40 Gb/s TDMA LAN and a 100 Gb/s packet self-routing switch for multiprocessor interconnection. Ultrafast networks might even provide the interconnection backplane inside future desktop routers and servers with massive throughput.

Ultra-high-bit-rate networking : From the transcontinental backbone to the desktop : Optical networks technology in Europe

A robust image watermarking technique using SVD and differential evolution in DCT domain

Region based QIM digital watermarking scheme for image database in DCT domain

Novel wavelet-based QIM data hiding technique for tamper detection and correction of digital images

In this paper, Discrete Cosine Transform (DCT) based blind video watermarking algorithm is proposed, which is perceptually invisible and robust against rotation and collusion attacks. To make the scheme resistant against rotation, watermark is embedded within the square blocks, placed on the middle position of every luminance channel. Then Zernike moments of those square blocks are calculated. The rotation invariance property of the Complex Zernike moments is exploited to predict the rotation angle of the video at the time of extraction of watermark bits. To make the scheme robust against collusion, design of the scheme is done in such a way that the embedding blocks will vary for the successive frames of the video. A Pseudo Random Number (PRN) generator and a permutation vector are used to achieve the goal. The experimental results show that the scheme is robust against conventional video attacks, rotation attack and collusion attacks.

A blind video watermarking scheme resistant to rotation and collusion attacks

This paper proposes a transform domain data-hiding scheme for quality access control of images. The original image is decomposed into tiles by applying n-level lifting-based discrete wavelet transformation (DWT). A binary watermark image (external information) is spatially dispersed using the sequence of number generated by a secret key. The encoded watermark bits are then embedded into all DWT-coefficients of nth-level and only in the high-high (HH) coefficients of the subsequent levels using dither modulation (DM) but without complete self-noise suppression. It is well known that due to insertion of external information, there will be degradation in visual quality of the host image (cover). The degree of deterioration depends on the amount of external data insertion as well as step size used for DM. If this insertion process is reverted, better quality of images can be accessed. To achieve that goal, watermark bits are detected using minimum distance decoder and the remaining self-noise due to information embedding is suppressed to provide better quality of image. The simulation results have shown the validity of this claim.

Quantization Based Data Hiding Scheme for Efficient Quality Access Control of Images Using DWT via Lifting

Transmission of digital data through radio mobile channel experiences fading effect that leads to severe degradation in quality. Error concealment is a postprocessing technique to improve this quality degradation. One such algorithm is proposed here using integer wavelet, data hiding and region-of-interest (ROI) coding functionality. Threshold based image segmentation and morphological operations are used together to find ROI. Halftoning technique is then used to obtain image digest from this ROI. To restore the human interested portion of an image, the information of ROI is embedded as image digest into the region-of-background (ROB) using data hiding based on quantization index modulation (QIM). Simulation results show that the scheme provides significant performance improvement with various lost blocks in ROI without affecting the compatibility of the standard JPEG 2000 coding scheme. Performance of the proposed scheme is also tested using simulations on Rayleigh-fading wireless channel and is compared with the few other error concealment methods.

Amit Phadikar

Papers

Region based QIM digital watermarking scheme for image database in DCT domain

Novel wavelet-based QIM data hiding technique for tamper detection and correction of digital images

A blind video watermarking scheme resistant to rotation and collusion attacks

Quantization Based Data Hiding Scheme for Efficient Quality Access Control of Images Using DWT via Lifting

Roi based error concealment of compressed object based image using QIM data hiding and wavelet transform