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Selected Contributions on Multimedia Quality Evaluation

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Watermarked 3D Object Quality Assessment

Touradj Ebrahimi, Elisa Drelie Gelasca

This work concerns the developing of new perceptual metrics for 3D watermarking quality assessment. Any water- marking algorithm, to be effective, requires that the distortions is inevitably introduces into the watermarked media is imperceptible. This requ ...

2004

Measuring Colourfulness in Natural Images

Sabine Süsstrunk, David Hasler

We want to integrate colourfulness in an image quality evaluation framework. This quality framework is meant to evaluate the perceptual impact of a compression algorithm or an error prone communication channel on the quality of an image. The image might go ...

2003

Image security and processing in the JPEG 2000 compressed domain

Raphaël Grosbois

Digital images are becoming increasingly successful thanks to the development and the facilitated access to systems permitting their generation (i.e. camera, scanner, imaging software, etc). A digital image basically corresponds to a 2D discrete set of reg ...

EPFL2003

Dense Matching of Multiple Wide-baseline Views

Christoph Strecha

This paper describes a PDE-based method for dense depth extraction from multiple wide-baseline images. Emphasis lies on the usage of only a small amount of images. The integration of these multiple wide-baseline views is guided by the relative confidence t ...

2003

Video Multicast in (large) local area networks

Martin Vetterli, Jean-Paul Wagner

We consider the problem of distributing high-quality video signals over IP multicast in large Local Area Networks (LANs), under real-time delay constraints, and with software-only processing. In a large LAN (such as the network of a university campus, or t ...

2002

Multimedia Teaching on WWW: a New Approach

Murat Kunt, Iva Bogdanova Vandergheynst

The Internet offers new and exciting possibilities for personalized and distance education. The Web Teaching project at ITS is creating the tools needed to provide complete high quality multimedia courses for delivery over the World Wide Web (WWW). Aside f ...

EUSIPCO2002

Color Handling in Panoramic Photography

Sabine Süsstrunk, David Hasler

Nowadays, the ability to create panoramic photographs is included with most of the commercial digital cameras. The principle is to shoot several pictures and stitch them together to build a panorama. To ensure the quality of the final image, the different ...

2001

Text Identification in Complex Background using SVM

Jean-Philippe Thiran, Hervé Bourlard, Datong Chen

This paper presents a fast and robust algorithm to identify text in image or video frames with complex backgrounds and compression effects. The algorithm first extracts the candidate text line on the basis of edge analysis, baseline location and heuristic ...

IDIAP2001

Text Identification in Complex Background using SVM

Jean-Philippe Thiran, Hervé Bourlard, Datong Chen

2001

High-performance compression of visual information - A tutorial review - Part I : Still Pictures

Touradj Ebrahimi, Murat Kunt

Digital images have become an important source of information in the modern world of communication systems. In their raw form, digital images require a tremendous amount of memory. Many research efforts have been devoted to the problem of image compression ...

1999