[Insight-users] How to solve differential equation in ITK

[Junyi Xia]

Hi ITKs,
    I am just wondering whether the following differential equation 
could be solved in ITK?
{ I1(x+u(x)) -I2(x) }*gradient(I1(x+u(x)) = 0
 where
     I1 is the moving image and I2 is the fixed image.
     u(x) is the displacement field.

Thanks.

- Junyi