Digital watermarking is considered to be a major technology for the protection of multimedia data. Some of the important applications are broadcast monitoring, copyright protection, and access control. In this paper, we present a semi-blind watermarking scheme for embedding a logo in color images using the DFT domain. After computing the DFT of the luminance layer of the cover image, the magnit...

In this paper, several effective learning algorithms using global image representations are adjusted and introduced to region-based image retrieval (RBIR). First, the query point movement technique is considered. By assembling all the segmented regions of positive examples together and resizing the regions to emphasize the latest positive examples, a composite image is formed as the new query. ...

This paper provides a summary of our work over the past two years on robust, high-volume data hiding in images. We first present a basic framework for imageadaptive hiding, which allows selection of the coefficients in which to hide, and employs powerful “turbo-like” erasures and errors codes in a novel manner to prevent desynchronization of encoder and decoder due to selective embedding. This ...

We present the evaluation of a product identification task using the LIRe system and SURF (Speeded-Up Robust Features) for content-based image retrieval (CBIR). The evaluation is performed on the Fribourg Product Image Database (FPID) that contains more than 3’000 pictures of consumer products taken using mobile phone cameras in realistic conditions. Using the evaluation protocol proposed with ...

Two-layer API: • The Browser: C++ API; audio capture, video capture, noise cancellation and noise reduction. Helps browser makers easily implement the Web API. • The Web: Used by the third party developers to develop web based video chat applications. Uses WebRTC, an open framework for real time communications in the browser. • The process of making the illusion of motion and change by rapidly ...

-Signature is the most important feature of a bank cheque. Basically signature verification is a scheme to verify a cheque for its authentication. The data base consist of several bank’s cheque. The present paper focuses on different steps including browsing a bank cheque, pre-processing, feature extraction, recognition. Preprocessing stage includes image resizing, noise elimination, thinning e...

SUMMARY Seam carving, which preserves semantically important image content during resizing process, has been actively researched in recent years. This paper proposes a novel forensic technique to detect the trace of seam carving. We exploit the energy bias and noise level of images under analysis to reliably unveil the evidence of seam carving. Furthermore , we design a detector investigating t...

It is demonstrated that the pre-dual for problems with total bounded variation regularization terms can be expressed as bilaterally constrained optimization problem. Existence of a Lagrange multiplier and an optimality system are established. This allows to utilize efficient optimization methods developed for problems with box constraints in the context of bounded variation formulations. Here, ...

Chris Connolly explained that TRIST attempts to subvert statelevel censorship by encoding hidden messages steganographically in images and video. However, because images and video are posted to social networks (Facebook or YouTube), naively encoded hidden messages are often lost in the transcoding/compressing done by the social networks. TRIST attempts to solve this by using an encoding that su...

This paper presents a new scalable and highly flexible color image coder based on a Matching Pursuit expansion. The Matching Pursuit algorithm provides an intrinsically progressive stream and the proposed coder allows us to reconstruct color information from the first bit received. In order to efficiently capture edges in natural images, the dictionary of atoms is built by translation, rotation...