Dear @ySalaun , thanks for provide this LineSfM code.
Lately I test this code. I found I got the different results compared to the result presented in your paper 《Robust SfM with Little Image Overlap》. I tested the sample images following the steps of the instruction: LSD_MULTISACALE--VANISHING_POINT--LINE_MATCHING--CALIBRATION--RECONSTRUCTION, but the dence.refined.mesh.ply only contains four 3D points.

ply
format ascii 1.0
element vertex 4
property float x
property float y
property float z
property uchar red
property uchar green
property uchar blue
element face 0
property list uint8 int32 vertex_indices
end_header
0.0106194 -0.189911 0.14482 50 255 50
0.803659 -0.126331 0.723105 50 255 50
1.567 -0.0715306 1.42358 50 255 50
2.56536 -0.0378929 1.85199 50 255 50

I notice that the openMVG folder is where I should save my detection with my openMVG, so I wonder if I got the wrong detection of the openMVG.