De-noising of WA seismic sections by a coherence filter

A new de-noising algorithm was implemented to perform a signal enhancement on high-density wide-angle reflection/refraction seismic sections (WARR). The algorithm was designed such as to attenuate more intensely the signal components that turn out less coherent within given offset intervals. A component is assumed here to be a portion in a short time interval of a single detail of the multi-resolution analysis of a trace. The filtered details are finally synthesised. The algorithm was given the name CDF, which stands for Coherence Detail Filter. The effectiveness of this filter was evaluated through a quantitative comparison between the results achieved from its application to noisy synthetic sections and those obtained with other filters widely used in seismic processing.