Abstract: The determination of coherent events in a seismic image is disclosed including the following operational phases: a phase of selecting a segmentation criterion based on a variable and at least one sliding window on the zone and its characteristics, a phase of hierarchical segmentation, for overlapping positions of the sliding window, including a segmentation of the zone into n regions and for each pixel located at least once by a segmentation boundary; a phase of assigning to the non-located pixels a value of indices (EI and EIC) corresponding to a numerical or alphanumeric characteristic non-value; a phase of determining coherent events of the image by thresholding the indices (EI and EIC), that is by selecting only located pixels of the zone corresponding to values lower or higher than a fixed threshold.

Abstract: The invention concerns the determination of coherent events in a seismic image comprising the following operational phases: a phase of selecting a segmentation criterion based on a variable and at least one sliding window on said zone and its characteristics, a phase of hierarchical segmentation, for overlapping positions of the sliding window, including a segmentation of said zone into n regions and for each pixel located at least once by a segmentation boundary; a phase of assigning to the non-located pixels a value of indices (EI and EIC) corresponding to a numerical or alphanumeric characteristic non-value; a phase of determining coherent events of the image by thresholding the indices (EI and EIC), that is by selecting only located pixels of the zone corresponding to values lower or higher than a fixed threshold.

Abstract: The method of the invention includes the following stages: a first stage for identifying the first order statistical anomalies on the basis of a set of raw regionalized data, a second stage for identifying second order statistical anomalies on the basis of the first order anomalies with extraction of the components considered as anomalistic components and components considered as coherent in space, establishing a quantified relation between any combination of the estimated values of the anomalistic components of the first and/or second order and any combination of the estimated values of the coherent components of the first and/or second order. The method can be applied in particular to geophysical data, image data obtained by physical methods or even to any type of sampling of natural phenomena.

Abstract: The method of the invention includes the following stages: