3D Fractional Order Sunshaded Image

This image shows the aeromagnetic data over Sudbury in Canada (greyscale, on left), plus the processed image (colour, 3D, on the right).
See ;
Cooper, G.R.J., and Cowan, D.R., 2003. Sunshading Geophysical Data Using Fractional Order Horizontal Gradients
The Leading Edge v.22 no.3 p.204-205.

Cooper, G.R.J., and Cowan, D.R., 2003. The Application of Fractional Calculus to Potential Field Data.
Exploration Geophysics v.34 no. 4 p.51-56.

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