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hessian

Arguments:

• { xx | xy | xz | yy | yz | zz }...{ xx | xy | xz | yy | yz | zz },_boundary_conditions    or
• (no arg) :

Description:

Compute the hessian components (second derivatives) of selected images along specified axes.

boundary_conditions can be { 0:dirichlet | 1:neumann | 2:periodic | 3:mirror }.
(no arg) compute all significant components.

Default values:

boundary_conditions=1.

Example of use: