This work addresses the problem of optimum decoding and detection of a multibit, multiplicative watermark hosted by Weibull-distributed features: a situation which is classically encountered for image watermarking in the magnitude-of-DFT domain. As such, this work can be seen as an extension of the system described in a previous paper, where the same problem is addressed for the case of 1-bit w...

The robustness against geometrical attacks remains one of the most challenging issues in watermarking of images and video. This paper presents an improvement of the video watermarking approach presented in [1], namely by using an amplitude-limiting filter and a high-pass filter to improve its watermark detection and using synchronization to resist attacks along temporal axis. Experimental resul...

Assessing and comparing the performance of watermarking algorithms is difficult. The visibility of the watermark is an important aspect in this process. In this paper, we propose two metrics for evaluating the visual impact of video watermarks. Based on several different watermarking algorithms and video sequences, we identify the most prominent impairments as spatial noise and temporal flicker...

This paper presents an evaluation for a wavelet-based digital watermarking technique used in estimating the quality of video sequences transmitted over Additive White Gaussian Noise (AWGN) channel in terms of a classical objective metric, such as Peak Signal-to-Noise Ratio (PSNR) without the need of the original video. In this method, a watermark is embedded into the Discrete Wavelet Transform ...

We explore the problem of proving ownership or origin of multimedia content like image / video or audio signals through watermarking. The need for watermarking arises out of the unsuitability of present copyright laws for claiming ownership of digital content. Watermarking schemes however, are threatened by counterfeit attacks, which primarily use the freedom available in the choice of signatur...

To protect the privacy of individuals in surveillance video, the images of selected individuals need to be erased, blurred or re-rendered. Such video modifications, however, destroy the authenticity of the surveillance video. In this proposal, we describe a new rate-distortion based compression domain video watermarking algorithm for the purpose of storing privacy information. Using this algori...

Error concealment techniques are useful in video transmission over channels that introduce bit errors. The efficiency and result of error concealment technique, however, rely on the error detection capabilities of video decoders. A novel error detection technique employing fragile watermarking is proposed in this paper. By embedding a fragile watermark on the quantized DCT coefficients and exam...

In this paper, we review recent developments in transparent data embedding and watermarking for audio, image, and video. Data-embedding and watermarking algorithms embed text, binary streams, audio, image, or video in a host audio, image, or video signal. The embedded data are perceptually inaudible or invisible to maintain the quality of the source data. The embedded data can add features to t...

Various digital watermarking techniques have been proposed in recent years as the methods to protect the copyright of multimedia data. However, as pointed out by the IBM research group, the rightful ownership problem has not been properly solved. Currently, there are two proposals to solve the ownership problem. Unfortunately, one proposal lacks a formal proof and the other can be easily defeat...