How do I compute the hessian matrix of a 3-D image?

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Ganesh P G
Ganesh P G 2017-1-31
I need to get the eigen values of the hessian matrix of 3-D lung CT scans to apply the selective dot enhancement filter. I have computed Fxx, Fxy etc using imgradientxyz function. As I understand it, I need to form the matrix :
Fxx Fxy Fxz
Fyx Fyy Fyz
Fzx Fzy Fzz
and run the eig function on it. But I got an out of memory error. Is there any other way to do it? Or did I miss something?
Thanks in advance.

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