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SUBDIVIDE AND CONQUER Active Contours and Surfaces for Biomedical Image Segmentation

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Effect of Segmentation Method on Video Retrieval Performance

David Grangier, Alessandro Vinciarelli

This paper presents experiments that evaluate the effect of different video segmentation methods on text-based video retrieval. Segmentations relying on modalities like speech, video and text or their combination are compared with a baseline sliding window ...

IDIAP2004

Towards Perceptually Driven Segmentation Evaluation Metrics

Touradj Ebrahimi, Elisa Drelie Gelasca

To be reliable, an automatic segmentation evaluation metric has to be validated by subjective tests. In this paper, a formal protocol for subjective tests for segmentation quality assessment is presented. The most common artifacts produced by segmentation ...

IEEE2004

Cast shadow segmentation using invariant colour features

Touradj Ebrahimi, Elena Salvador

Shadows are integral parts of natural scenes and one of the elements contributing to naturalness of synthetic scenes. In many image analysis and interpretation applications, shadows interfere with fundamental tasks such as object extraction and description ...

2004

Stereoscopic Vision and Trajectory Recognition

This technical report presents the development of a stereoscopic vision tracking system based on color segmentation and optical flow. ...

2004

From error probability to information theoretic signal and image processing

Torsten Butz

The signal processing community is increasingly interested in using information theoretic concepts to build signal processing algorithms for a variety of applications. A general theory on how to apply the mathematical concepts of information theory to the ...

EPFL2003

Teaching Image-Processing Programming in Java

Michaël Unser, Daniel Sage

Image processing (IP) can be taught very effectively by complementing the basic lectures with computer laboratories where the participants can actively manipulate and process images. This offering can be made even more attractive by allowing the students t ...

IEEE2003

Segmenting Multiple Concurrent Speakers Using Microphone Arrays

Guillaume Lathoud, Darren Moore

Speaker turn detection is an important task for many speech processing applications. However, accurate segmentation can be hard to achieve if there are multiple concurrent speakers (overlap), as is typically the case in multi-party conversations. In such c ...

IDIAP2003

Segmenting Multiple Concurrent Speakers Using Microphone Arrays

Guillaume Lathoud, Darren Moore

2003

Object-based video: extraction tools, evaluation metrics, and applications

Touradj Ebrahimi, Andrea Cavallaro

The representation of video information in terms of its content is atthe foundation of many multimedia applications, such as broadcasting,content-based information retrieval, interactive video, remotesurveillance and entertainment. In particular, object-ba ...

2003

Exploring Curved Anatomic Structures with Surface Sections

Roger Hersch, Sebastian Gerlach, Laurent Saroul

The extraction of planar sections from volume images is the most commonly used technique for inspecting and visualizing anatomic structures. We propose to generalize the concept of planar section to the extraction of curved cross-sections (free form surfac ...

Institute of Electrical and Electronics Engineers Computer Society2003