nivha / surface_networks_covers

Surface Networks via General Covers

Pytorch implementation for paper Surface Networks via General Covers, ICCV 2019.

By: Niv Haim, Nimrod Segol, Heli Ben-Hamu, Haggai Maron and Yaron Lipman

Run

Follow relevant python files under examples.

Citation

If you find our work useful in your research, please consider citing:

@inproceedings{haim2019surface,
	title={Surface networks via general covers},
	author={Haim, Niv and Segol, Nimrod and Ben-Hamu, Heli and Maron, Haggai and Lipman, Yaron},
	booktitle={Proceedings of the IEEE/CVF International Conference on Computer Vision},
	pages={632--641},
	year={2019}
}

Code Credits

We used code from open-source repositories, including S2CNN, Tiramisu, among others.

surface_networks_covers's Issues

Get obj.L all zeros and obj.V_plane NaN when running paramterize_surface.m

Hi Niv, can you take a look at this? Thanks a lot!

Environment: matlab2017a
Code:

V = textread('v.txt') %size 6890x3
T = textread('t.txt')
T = T(:,1:3) + 1 %size 13776x3
f = textread('v.txt') %same as V

addpath(genpath('..\matlab\helpers'))
% normalize mesh
V = V / sqrt(CORR_calculate_area(T,V));
% centralize mesh
V = V - mean(V, 1);

paramterize_surface(V,T,f)

input data:
v.txt
t.txt

Error:
Get endless loop here:

surface_networks_covers/matlab/helpers/mytri2grid.m

Line 120 in 48562e7

for i=1:nt,

After debugging, I find that obj.L is a sparse matrix and in

surface_networks_covers/matlab/flattening/Torus_Flattener.m

Line 194 in 8fd7730

function u = solve_tutte(obj)

obj.b is also a sparse matrix. Thus, when obj.L divided by obj.b, most members are NaN.

I also tried .obj file provided in examples\shape_retrieval\meshes\test_perturbed:
mesh_path = '000018.obj'
[V, T] = readOBJ(mesh_path);
f = T

This get another error:
_Index exceeds matrix dimensions.

Error in Gluer/subdivide_and_cut (line 234)
f = f(:,1);

Error in Gluer (line 80)
[G1,W1,cut_sphere_to_sphere,ds_cone_to_generic_vertex] = subdivide_and_cut(obj,genertic_vertex);

Error in flatten_sphere (line 5)
gluer = Gluer(V,T,cones,tuple,min_agd_point);

Error in paramterize_surface (line 22)
[cutMesh, ~, ~] = flatten_sphere(V ,T, cones, min_agd_point, tuple1);

Error in main (line 24)
paramterize_surface(V,T,f)_

'f' is 0x0 here:

surface_networks_covers/matlab/flattening/Gluer.m

Line 234 in 8fd7730

f = f(:,1);

What's the problem and how can I fix this?

Demo misses functions and can you give a complete one?

Missing definition of two functions in aggregate_predictions.m:
get_prediction_for_img
evaluate_mesh

Can you provide ? Thx.