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We describe a new watermarking system based on the principles of informed coding and informed embedding. This system is capable of embedding 1380 bits of information in images with dimensions 240 x 368 pixels. Experiments on 2000 images indicate the watermarks are robust to significant valumetric distortions, including additive noise, low-pass filtering,(More)
Many electronic watermarks for still images and video content are sensitive to geometric distortions. For example, simple rotation, scaling, and/or translation (RST) of an image can prevent blind detection of a public watermark. In this paper, we propose a watermarking algorithm that is robust to RST distortions. The watermark is embedded into a(More)
We describe a novel method for real-time, simultaneous multi-view face detection and facial pose estimation. The method employs a convolu-tional network to map face images to points on a manifold, parametrized by pose, and non-face images to points far from that manifold. This network is trained by optimizing a loss function of three variables: image ,(More)
This paper 1 describes PicHunter, an image retrieval system that implements a novel approach to relevance feedback, such that the entire history of user selections contributes to the system's estimate of the user's goal image. To accomplish this, PicHunter uses Bayesian learning based on a probabilistic model of a user's behavior. The predictions of this(More)
Electronic watermarking can be traced back as far as 1954. The last 10 years has seen considerable interest in digital watermarking, due, in large part, to concerns about illegal piracy of copyrighted content. In this paper, we consider the following questions: is the interest warranted? What are the commercial applications of the technology? What(More)
We describe a number of applications of digital water-marking and the examine the common properties of robust-ness, tamper resistance, fidelity, computational cost and false positive rate. We observe that these properties vary greatly depending on the application. Consequently, we conclude that evaluation of a watermarking algorithm is difficult without(More)
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A new algorithm and systematic evaluation is presented for searching a database via relevance feedback. It represents a new image display strategy for the PicHunter system [2, 1]. The algorithm takes feedback in the form of relative judgments (" item A is more relevant than item B ") as opposed to the stronger assumption of categorical relevance judgments(More)
This paper addresses how the eeectiveness of a content-based, multimedia information retrieval system can be measured , and how such a system should best use response feedback in performing searches. We propose a simple, quan-tiiable measure of an image retrieval system's eeective-ness, \target testing", in which eeectiveness is measured as the average(More)
— Audio fingerprinting is an emerging research field in which a song must be recognized by matching an extracted " fingerprint " to a database of known fingerprints. Audio fingerprinting must solve the two key problems of representation and search. In this paper, we are given an 8192-bit binary representation of each five second interval of a song and(More)