For a 3d point in pointcloud, How to get Image and corresponding 2d point?

Jyothi_viswanadham · 1 July 2022 07:35

Saijin_Naib · 1 July 2022 22:34

Very interesting question! I hope someone with more experience and knowledge in this space can offer you some guidance.

Jyothi_viswanadham · 7 July 2022 09:47

What is boundary.json. does it have any cue on how it can be done?

Saijin_Naib · 7 July 2022 11:40

No, I don’t think it will help much.

Have you searched here to see if any of the prior similar questions can help you out?

ThorZ · 7 July 2022 13:33

You need to load each shot in reconstruction.json file and project the 3d points on each shot. OpenSfm provides such functions to do it, but you might need to read the source code as there is no detailed documentation.

You can check Reconstruction type and its attributes for more details(shots, cameras)

github.com

mapillary/OpenSfM/blob/a1a253f148d6e5daf6f2247e43e7d3fd306def53/opensfm/types.py#L25-L33

      
        
            class Reconstruction(object):
                """Defines the reconstructed scene.
            
            
    Attributes:
                  cameras (Dict(Camera)): List of cameras.
                  shots (Dict(Shot)): List of reconstructed shots.
                  points (Dict(Point)): List of reconstructed points.
                  reference (TopocentricConverter): Topocentric reference converter.
                """

Jyothi_viswanadham · 8 July 2022 10:33

Thank you.

what you said echoed approach in a post from here
shot = rec.shots[image] pt2D = shot.project(pt3D) pt2D_px = cam.normalized_to_pixel_coordinates(pt2D)

system · 7 August 2022 10:33

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