Gradient Calculation

The gradient calculation calculates the devrivative of the data in the azimuth specified. It allows for the calcutaion of a conventional horizontal derivative, a derivative ratio (ratio of x and y derivatives) and a vertical derivative.

Options

References

Cooper,G.R.J., Cowan, D.R. 2007. Enhancing linear features in image data using horizontal orthogonal gradient ratios. Computers and Geosciences, 33, p.981-984