How is the weights.txt generated? (For c++ "from scratch" version) about 3d_face_dense_registration HOT 7 CLOSED

It is an array sized NX30, where N is the number of vertices and 30 is the number of landmarks. Each element is inversely proportional to the squared distance between each landmark and each vertex.

You can also refer to the matlab version (demo_dense_registration.m Line 79-94 ), where Dfield.mat is a matrix of which each element is the geodesic distance from each point to each landmark on the template. I precompute it using a heat-flow based method [Crane et al. ACM TOG 2013. Geodesics in heat: A new approach to computing distance based on heat flow]. Other method for the computation of geodesic distance is OK. It only requires to be computed once only on the template.

from 3d_face_dense_registration.

It is an array sized NX30, where N is the number of vertices and 30 is the number of landmarks. Each element is inversely proportional to the squared distance between each landmark and each vertex.

You can also refer to the matlab version (demo_dense_registration.m Line 79-94 ), where Dfield.mat is a matrix of which each element is the geodesic distance from each point to each landmark on the template. I precompute it using a heat-flow based method [Crane et al. ACM TOG 2013. Geodesics in heat: A new approach to computing distance based on heat flow]. Other method for the computation of geodesic distance is OK. It only requires to be computed once only on the template.

I find that the element in weights.txt equals to 1/(geodesic_distansce)^4, where the geodesic_distansce is the elements in Dfield.mat, is it right?

from 3d_face_dense_registration.

I remember that it is right. You can test and verify it.

from 3d_face_dense_registration.

There are also some tricks to avoid to denominator to be zero.

from 3d_face_dense_registration.