The calculation method of curvature attributes and its effect analysis

Summary in recent years, curvature attribute gets rapid development and application in structural identification and seismic interpretation. The previous researches calculated the curvature by using the least square method to approximate the local surface with 3×3 grid. Its specific calculation formula is deduced by Roberts. On the basis of Roberts' derivation, We apply the central difference method for calculating the spatial derivatives and express it as a differential operator. In addition to the 3×3 grid, we have also derived the expression of the curvature of 5×5 grid and then compare with the results got by 3×3 grid and 5×5 grid. The results prove that the method of 5×5 grid is better than the method of 3×3 grid in the aspect of faults and tectonic feature recognition.