1. A method for processing multi-dimensional signal data to determine frequency dependent features therefrom comprising: a) receiving the multi-dimensional signal data, the multi-dimensional signal data being one of space-dependent data and time-space-dependent data indicative of a characteristic of one of an object and physical event; b) transforming the multi-dimensional signal data into one of space-frequency and time-space-frequency domain, respectively, providing second signal data; c) determining at predetermined locations of at least a portion of the one of space and time-space of the second signal data a dominant feature corresponding to a largest value of the second signal data; d) determining at each of the predetermined locations a wave-vector corresponding to the dominant feature; and, e) determining at each of the predetermined locations data indicative of the frequency dependent features in dependence upon the corresponding wave-vector.