preprocess the template with the same way as train dataset results in wrong data structure and cause keyError in _get_template_info

[herical]

I follow the Dataset and Pre-Processing part to prerocess train dataset and the template but I found that the "surface_pts_n_normal" result of template couldn't satisfied the need in _get_template_info. There are some codes in _get_template_info def _get_template_info(self): ... templ_surf_pth = './data/template/surface_pts_n_normal/%s.mat'%self.template_name templ_surf_mat = loadmat(templ_surf_pth) templ_surf_pc = templ_surf_mat['p'][:, :3] templ_trig_id = np.squeeze(templ_surf_mat['trig_id']) templ_baryc = templ_surf_mat['bary_coord'] ...

It seems that my templ_surf_mat has no key names "trig_id" or "bary_coord" File "<ipython-input-2-5376759be172>", line 1, in <module> templ_surf_mat['trig_id'] KeyError: 'trig_id' File "<ipython-input-3-27547a3a9825>", line 1, in <module> templ_surf_mat['bary_coord'] KeyError: 'bary_coord' The data structure of my templ_surf_mat is: {'__header__': b'MATLAB 5.0 MAT-file Platform: posix, Created on: Mon Oct 10 11:19:59 2022', '__version__': '1.0', '__globals__': [], 'p': array([[]])}

I wonder how to preprocess the template data correctly?

[Sentient07]

Hello, sorry for the late reply. We use barycenter based correspondence and as a result you'd need for your template surface points, the information on triangle they're a part of and its local coordinate. We provide this in the templates which we made available here.

[susuhu]

I have the same question. Can you please tell how we could get "trig_id" or "bary_coord" for our own dataset?

and btw the file you provided doesn't contain "trig_id" or "bary_coord" either.

Hello, sorry for the late reply. We use barycenter based correspondence and as a result you'd need for your template surface points, the information on triangle they're a part of and its local coordinate. We provide this in the templates which we made available here.

[Sentient07]

Hi,

Can you please tell how we could get "trig_id" or "bary_coord" for our own dataset?

If you sample your template mesh evenly, you can get the points (coordinate in R^3) and the triangle from which they're from. Then you can get barycentric coordinate from here: , then you can convert those barycentric coordinates to other meshes in your training dataset as long as you've correspondence between triangles using this method. Which is what happens here:

btw the file you provided doesn't contain "trig_id" or "bary_coord" either

I can see those two keys in surface_pts_n_normal/template.mat file. Which file are you looking at?

[susuhu]

Hi,

Can you please tell how we could get "trig_id" or "bary_coord" for our own dataset?

If you sample your template mesh evenly, you can get the points (coordinate in R^3) and the triangle from which they're from. Then you can get barycentric coordinate from here: , then you can convert those barycentric coordinates to other meshes in your training dataset as long as you've correspondence between triangles using this method. Which is what happens here:

btw the file you provided doesn't contain "trig_id" or "bary_coord" either

I can see those two keys in surface_pts_n_normal/template.mat file. Which file are you looking at?

there is no surface_pts_n_normal/template.mat