Detection of the boundaries of time-frequency patterns with a reassignment-based method

Fabien Millioz (1) , Nadine Martin (1)

1 LIS - Laboratoire des images et des signaux

A boundary detection of time-frequency patterns of the spectrogram based on the reassignment vector field is proposed. Given that the spectrogram tends to spread the time-frequency patterns, whereas reassignment moves the spread energy back to a pattern's point, reassignment vectors aim at the pattern. Looking for time-frequency areas with homogeneous reassignment vector angles leads to a boundary detection.

Mots clés: Time-frequency; Boundary detection; segmentation; reassignment vector field; spectrogram

Domaines: Traitement du signal et de l'image [eess.SP]; Traitement du signal et de l'image [eess.SP]

Fabien Millioz, Nadine Martin. Detection of the boundaries of time-frequency patterns with a reassignment-based method. Seventh International Conference on Mathematics in Signal Processing. IMA 2006, Dec 2006, United Kingdom. ⟨hal-00285996⟩