I have a point cloud and want to take it's projection form a given angle of the camera. I am trying the pinhole camera projection but it requires the intrinsic and extrinsic parameters which are not available. What would be the best way to take projection without them? I just wanted to get a 2d image from the 3d point cloud. An approximate projection which may require us to assume some camera parameters will do too.
Hi Anupam Anurag Tripathi , if you want to generate a 360 projection, then I suggest cylindrical or spherical projection from point cloud. attached is a reference that should help you with the necessary details. Remember that the goal is to find pixel coordinates of the projection image for all (x,y,z) points. Tell me if this helpsArticle SEMANTIC ENRICHMENT OF POINT CLOUD BY AUTOMATIC EXTRACTION A...
Supposing that you are using open3d library, if you have the PC, you can load the camera parameters via load_pinhole_camera_parameters.
Here is an example in python of how you can move the perspective (came angle) and then save a view for this perspective/projection:
param = load_pinhole_camera_parameters(pcd) vis = o3d.visualization.Visualizer()
vis.create_window() ctr = vis.get_view_control() vis.add_geometry(pcd) ctr.convert_from_pinhole_camera_parameters(param) vis.update_geometry() vis.capture_screen_image(path, True)
Hi
Please check the following work. It describes the process in details. I believe it will help you.
https://ieeexplore.ieee.org/document/6923303
Regards
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