This paper presents a semi-automatic method for tracking the mitral valve leaflet in transesophageal echocardiography. The algorithm requires a manual initialization and then segments an image sequence. The use of two constrained active contours and curve fitting techniques results in a fast segmentation algorithm. The active contours successfully track the inner cardiac muscle and the mitral v...

The Bird Identification Task of the LifeCLEF 2014 lab is to automatically identify 501 different species in over 4000 audio recordings collected by amateur and expert ornithologists through a citizen sciences initiative. It is one of the biggest bird classification challenges so far considering the quality, quantity and variability of the recordings and the very large number of different specie...

Prosodic data mining in large spontaneous speech corpora often requires acoustic analysis of recordings done in poor conditions. The most detrimental pertain to the absence first harmonic in voiced segments and the presence of echo. In such cases it is very difficult to separate inter vocalic consonantal voicing from echo, or recover Fo from remaining harmonics. To address these problems, 10 di...