Computing Jacobians from a mesh

[youngju-na]

Hi,
First of all, thanks for sharing this great work and for providing the implementation!
I have a question regarding the computation of Jacobians from a mesh.

I used the function below function to recompute the Jacobians from the given mesh.

NPR/src/geometry/PoissonSystem.py

Line 363 in dce7a5a

def jacobians_from_vertices(

However, the recomputed Jacobians differ from the ones provided in the given dataset (smpl_default/jacobians/...).
Below is a visualization of the motion transfer results using both sets of Jacobians:

Left: Source pose,
Center: Target mesh using provided Jacobians,
Right: Target mesh using recomputed Jacobians

As you can see, the results vary depending on which Jacobians are used.
Would you be able to provide more details on how the Jacobians in the dataset were originally computed?
This would make it easy for me to apply this method to other custom meshes.

Any clarification would be greatly appreciated!

Thanks in advance.