Wavelet transform analysis of dynamic speckle patterns texture.
We propose the use of the wavelet transform to characterize the time evolution of dynamic speckle patterns. We describe it by using as an example a method used for the assessment of the drying of paint. Optimal texture features are determined and the time evolution is described in terms of the Mahalanobis distance to the final (dry) state. From the behavior of this distance function, two parameters are defined that characterize the evolution. Because detailed knowledge of the involved dynamics is not required, the methodology could be implemented for other complex or poorly understood dynamic phenomena.
Limia
Margarita Fernández
MF
Departamento de Fïsica, Instituto Superior Politécnico José A. Echeverría, Facultad de Ingenería Eléctrica, La Habana, Cuba.
Núñez
Adriana Mavilio
AM
Rabal
Héctor
H
Trivi
Marcelo
M