3D mesh generation form 3D cloud points, using open3D

 refer to code

.

import open3d as o3d

import numpy as np

import os

def load_point_cloud(file_path):

print("Loading point cloud...")

return o3d.io.read_point_cloud(file_path)

def estimate_normals(pcd):

print("Estimating normals...")

pcd.estimate_normals(search_param=o3d.geometry.KDTreeSearchParamHybrid(radius=0.1, max_nn=30))

return pcd

def remove_invalid_normals(pcd):

print("Removing invalid normals...")

valid_indices = np.where(np.linalg.norm(np.asarray(pcd.normals), axis=1) != 0)[0]

return pcd.select_by_index(valid_indices)

def poisson_reconstruction(pcd):

print("Performing Poisson surface reconstruction...")

mesh, _ = o3d.geometry.TriangleMesh.create_from_point_cloud_poisson(pcd, depth=8)

return mesh

def simplify_mesh(mesh):

print("Simplifying mesh...")

return mesh.simplify_quadric_decimation(target_number_of_triangles=10000)

def save_mesh(mesh, file_path):

print(f"Mesh saved to '{file_path}'")

o3d.io.write_triangle_mesh(file_path, mesh)

def main():

file_path = "/path/3d_cloud.ply"

pcd = load_point_cloud(file_path)

pcd = estimate_normals(pcd)

pcd = remove_invalid_normals(pcd)

mesh = poisson_reconstruction(pcd)

mesh = simplify_mesh(mesh)

mesh_file = os.path.join(os.path.dirname(file_path), 'mesh.ply')

save_mesh(mesh, mesh_file)

if __name__ == "__main__":

main()

..

install open3d using pip install open3d

Thank you.

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