avanindra / epvh Goto Github PK

Just a simple question: is this your re-implement or from the author of the paper? The author used to provide his code, but not any more.

And is the code functional now?

Hi, I am checking the code, but I could not find the implementation of the Silhouette class. Would you kindly push it, so I can do some fix to the existing code. (to remove compilation errors.)

As the title says, If this is based of off a specific paper could you link it?

This is a more or less general question, which baffled me a lot.

Why there is no naive implementation with half space intersection?

One flaw I can see (but now sure) is that half space has difficulties with silhouettes with holes. Do you known any other reasons?

epvhdemo.exe!tr::BaseVH::buildPrimitives(int camId, std::vector<Eigen::Matrix<double,2,1,0,2,1>,std::allocator<Eigen::Matrix<double,2,1,0,2,1> > > & contour) Line 366

it happens after being able to scan my cameras but when doing compute() inline 2141 of epvhdemo.exe, it runs into that error.

my contour file is attached. Thanks!

alien-contour.txt

Hi,

I compiled the code using VTK-7.1.1, opencv-3.4.4 and eigen3. When I execute the demo I get a bunch of "found invalid vertex connection" and then multiple "connection error". This results in the mesh of the VH being full of holes.

Is there a fix I can try to avoid this behaviour?

Thanks

After a few minor fixes, the demo works on my mac.
I checked the polyhedra calculated with the provided dataset, but it seems the polyhedra is empty, i.e. with 0 vertices.

The following is the output from demo:

 reading completed 48
24 23
 number of silhouette cams : 23
 primitives built
 generator normals computed
 clippers built
 camera : 0
 camera : 1
 camera : 2
 camera : 3
 camera : 4
 camera : 5
 camera : 6
 camera : 7
 camera : 8
 camera : 9
 camera : 10
 camera : 11
 camera : 12
 camera : 13
 camera : 14
 camera : 15
 camera : 16
 camera : 17
 camera : 18
 camera : 19
 camera : 20
 camera : 21
 camera : 22
 viewing edges initialized
 viewing edges associated with generators
 vertices initialized , statrting polygon computation
 visual hull computed

When I check the polygons with GetNumberOfVerts, the result is 0.

And the vtk window does not appear in my case, which I think is related to my vtk library configuration.

Hi @avanindra,

I'v already gone through the demo code and now I want to implement this demo on my own image.
Here's my problem:
I really don't know how to generate the data like data in the alien-contour.txt. Is there any methods or functions to generate them in this git?
I'll really appreciate it if I got your reply!

Thank you very much!

Hi, it is me again.

It looks like you are trying to replace cv::Point(2f) with Eigen::Vector2d . Am I right?

So the Eigen::Vector will be the final representation for all vectors and points?

I'd like to create my own dataset and pass through another set of images to see how this code works. however, I am unsure of how to make a camera.txt and contour.txt file.

any pointers? thanks so much!