In this paper a system for handwritten text localization in document images is proposed. Our system performs skew angle correction using Wigner-Ville distribution and localizes the handwritten areas of the document based on several measures concerning regularity in shape (selfcorrelation, horizontal and vertical symmetry) and in dimensions (aspect ratio, distribution of heights and widths). The...

In this paper, we consider the analysis of polynomial FM signals corrupted by additive heavy-tailed noise. Standard timefrequency techniques fail to analyze such signals. For that, we propose here a new technique, named the robust polynomial WignerVille distribution (r-PWVD) to handle this case. We show that this representation outperforms the robust Wigner-Ville distribution (rWVD) and the rob...

Assessment of muscle fatigue involves the creation of indices based on the estimation of variables such as the instantaneous frequency (IF) and the instantaneous amplitude (IA), which can be estimated from a time-frequency (TF) distribution of a surface electromyographic signal (SEMG). Since during muscle fatigue there is a decrease of the IF and an increase of the IA, slopes from these paramet...

This paper presents a new characterization of musical signals which may lead to better understanding about how such signals are perceived. We first consider some signal analysis methods which facilitate measures of perceived qualities of music. More precisely, we consider a particular representation of signal energy on which to base a quantitative measure of sensory dissonance. After defining s...

Abstract Linear canonical transform as a general integration has been considered into Wigner-Ville distribution (WVD) to show more powerful ability for non-stationary signal processing. In this paper, new WVD associated with linear (WVDL) and form of WVDL (IWVDL) are presented. First, the definition is derived based on autocorrelation function some properties investigated in details. It removes...

The information conveyed by the discrete Wigner-Ville representations of real, complex or analytic signals is highly redundant, each time-frequency location being related to others via non-obvious relationships. In this paper, we demonstrate that there also exists a large amount of linear relationships between time-frequency samples. This implies that a whole discrete Wigner-Ville representatio...

New method of observation and diagnosis of inverter-fed induction motor drives is developed and tested. Unsymmetrical conditions concerning the machine impedances or valves operation are reflected in the spectrum of the current spacephasor. We estimate the spectrum of the space-phasor with the help of the Wigner-Ville distribution (WVD) and we obtain its time-frequency representation with excel...

Nous proposons dans cet article une contribution à la théorie récemment introduite des signaux quasi-cyclostationnaires généralisés. Cette classe de signaux étend la classe des signaux quasicyclostationnaires au cas de signaux dont les fréquences cycliques dépendent du temps. Des représentations temps-fréquence de ces signaux sont données en fonction des statistiques cycliques généralisées. Not...