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| import json |
| import os |
| import open3d as o3d |
| import numpy as np |
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| mesh = o3d.io.read_triangle_mesh("./source.stl") |
| pointcloud = mesh.sample_points_poisson_disk(50000) |
| coord_frame = o3d.geometry.TriangleMesh.create_coordinate_frame(size=50.0, origin=[0, 0, 0]) |
| mesh.compute_vertex_normals() |
| mesh_triangles = np.asarray(mesh.triangles) |
| vertex_positions = np.asarray(mesh.vertices) |
| triangle_normals = np.asarray(mesh.triangle_normals) |
| |
| centroid = mesh.get_center() |
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| folder = "./dataset" |
| json_path = "ply_files.json" |
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| resolutions = { |
| "100": 1.0, |
| "75": 0.8, |
| "50": 0.8, |
| "25": 0.8, |
| "0": 0.8 |
| } |
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| |
| try: |
| with open(json_path, "r", encoding="utf-8") as f: |
| categorized_files = json.load(f) |
| except FileNotFoundError: |
| print(f"오류: '{json_path}' 파일을 찾을 수 없습니다. 먼저 파일 분류 코드를 실행해 주세요.") |
| exit() |
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| |
| print("=== 데이터 처리 시작 ===") |
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| for category, resolution in resolutions.items(): |
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| print(f"\n--- [카테고리: {category}, 해상도: {resolution}] 처리 시작 ---") |
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| filenames_in_category = categorized_files.get(category, []) |
| |
| if not filenames_in_category: |
| print("처리할 파일이 없습니다.") |
| continue |
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| for filename in filenames_in_category: |
| |
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| file_path = os.path.join(folder, f"{filename}.ply") |
| |
| print(f" - 파일 처리 중: {file_path} (해상도: {resolution})") |
| |
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| filename = filename |
| |
| pcd = o3d.io.read_point_cloud(f"./dataset/{filename}.ply") |
|
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| GT = False |
| if GT==True: |
| mesh = o3d.io.read_triangle_mesh("./bottle2.stl") |
| pointcloud = mesh.sample_points_poisson_disk(50000) |
| coord_frame = o3d.geometry.TriangleMesh.create_coordinate_frame(size=50.0, origin=[0, 0, 0]) |
|
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| mesh.compute_vertex_normals() |
| mesh_triangles = np.asarray(mesh.triangles) |
| vertex_positions = np.asarray(mesh.vertices) |
| triangle_normals = np.asarray(mesh.triangle_normals) |
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| |
| centroid = mesh.get_center() |
| filtered_triangles = [] |
| for i, triangle in enumerate(mesh_triangles): |
| |
| tri_center = vertex_positions[triangle].mean(axis=0) |
| |
| vec_to_center = tri_center - centroid |
| |
| dot_product = np.dot(triangle_normals[i], vec_to_center) |
| |
| if dot_product > 0: |
| filtered_triangles.append(triangle) |
| |
| outer_mesh = o3d.geometry.TriangleMesh() |
| outer_mesh.vertices = mesh.vertices |
| outer_mesh.triangles = o3d.utility.Vector3iVector(np.array(filtered_triangles)) |
| |
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| pcd = outer_mesh.sample_points_uniformly(number_of_points=50000) |
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| pcd_array = np.asarray(pcd.points) |
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|
| import open3d as o3d |
| import numpy as np |
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| if not GT: |
| ply_path = f"./dataset/{filename}.ply" |
|
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| pcd = o3d.io.read_point_cloud(ply_path) |
| print(ply_path) |
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| pcd_array = np.asarray(pcd.points) |
| print(pcd_array.shape) |
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| coord_frame = o3d.geometry.TriangleMesh.create_coordinate_frame(size=50.0, origin=[0, 0, 0]) |
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| if GT==False: |
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| new_pcd_array = np.unique(pcd_array, axis=0) |
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| new_pcd_array = new_pcd_array[new_pcd_array[:, 2] < 1000] |
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| new_pcd_array = new_pcd_array[new_pcd_array[:, 1] > -1000] |
| new_pcd_array = new_pcd_array[new_pcd_array[:, 1] < 120] |
| new_pcd_array = new_pcd_array[new_pcd_array[:, 0] > -1000] |
| new_pcd_array = new_pcd_array[new_pcd_array[:, 0] < 1000] |
| |
| |
| print(np.mean(new_pcd_array, axis=0)) |
|
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| new_pcd = o3d.geometry.PointCloud() |
| new_pcd.points = o3d.utility.Vector3dVector(new_pcd_array) |
|
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| theta = np.radians(90) |
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| new_pcd_array = np.asarray(new_pcd.points) |
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| coord_frame = o3d.geometry.TriangleMesh.create_coordinate_frame(size=50.0, origin=[0, 0, 0]) |
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| if GT==False: |
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| plane_model, inliers = new_pcd.segment_plane(distance_threshold=1, |
| ransac_n=10, |
| num_iterations=1000) |
| [a, b, c, d] = plane_model |
| print(f"Plane equation: {a:.2f}x + {b:.2f}y + {c:.2f}z + {d:.2f} = 0") |
| |
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| inlier_cloud = new_pcd.select_by_index(inliers) |
| inlier_cloud.paint_uniform_color([1.0, 0, 1.0]) |
| outlier_cloud = new_pcd.select_by_index(inliers, invert=True) |
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| new_pcd = outlier_cloud |
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| new_pcd_array = np.asarray(new_pcd.points) |
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| CHECK_PERTURB = GT |
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| def random_rotation_matrix(): |
| """ |
| Generate a random 3x3 rotation matrix (SO(3) matrix). |
| |
| Uses the method described by James Arvo in "Fast Random Rotation Matrices" (1992): |
| 1. Generate a random unit vector for rotation axis |
| 2. Generate a random angle |
| 3. Create rotation matrix using Rodriguez rotation formula |
| |
| Returns: |
| numpy.ndarray: A 3x3 random rotation matrix |
| """ |
| |
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| theta = 0 |
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| axis = np.array([ |
| 1, |
| 0, |
| 0, |
| ]) |
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| axis = axis / np.linalg.norm(axis) |
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| K = np.array([ |
| [0, -axis[2], axis[1]], |
| [axis[2], 0, -axis[0]], |
| [-axis[1], axis[0], 0] |
| ]) |
| |
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| R = (np.eye(3) + |
| np.sin(theta) * K + |
| (1 - np.cos(theta)) * np.dot(K, K)) |
| |
| return R |
|
|
| if CHECK_PERTURB: |
| R_pert = random_rotation_matrix() |
| print(R_pert) |
| t_pert = np.array([ |
| 0, |
| 0, |
| 0 |
| ]) |
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| |
| perturbed_pcd_array = np.dot(R_pert, pcd_array.T).T + t_pert.T |
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| perturbed_pcd = o3d.geometry.PointCloud() |
| perturbed_pcd.points = o3d.utility.Vector3dVector(perturbed_pcd_array) |
| coord_frame = o3d.geometry.TriangleMesh.create_coordinate_frame(size=50.0, origin=[0, 0, 0]) |
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| CHECK_PERTURB = not GT |
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| if CHECK_PERTURB: |
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| perturbed_pcd_array = new_pcd_array |
| perturbed_pcd = o3d.geometry.PointCloud() |
| perturbed_pcd.points = o3d.utility.Vector3dVector(perturbed_pcd_array) |
| |
| now_centeroid = perturbed_pcd.get_center() |
| perturbed_pcd.translate(centroid, relative=False) |
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| translation_vector = centroid - now_centeroid |
|
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| np.savetxt(f"./centroid/{filename}.txt",translation_vector) |
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| perturbed_pcd_array = np.asarray(perturbed_pcd.points) |
| coord_frame = o3d.geometry.TriangleMesh.create_coordinate_frame(size=50.0, origin=[0, 0, 0]) |
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| def write_ply(points, output_path): |
| """ |
| Write points and parameters to a PLY file |
| |
| Parameters: |
| points: numpy array of shape (N, 3) containing point coordinates |
| output_path: path to save the PLY file |
| """ |
| with open(output_path, 'w') as f: |
| |
| f.write("ply\n") |
| f.write("format ascii 1.0\n") |
| |
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| f.write(f"element vertex {len(points)}\n") |
| f.write("property float x\n") |
| f.write("property float y\n") |
| f.write("property float z\n") |
| |
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| f.write("element camera 1\n") |
| f.write("property float view_px\n") |
| f.write("property float view_py\n") |
| f.write("property float view_pz\n") |
| f.write("property float x_axisx\n") |
| f.write("property float x_axisy\n") |
| f.write("property float x_axisz\n") |
| f.write("property float y_axisx\n") |
| f.write("property float y_axisy\n") |
| f.write("property float y_axisz\n") |
| f.write("property float z_axisx\n") |
| f.write("property float z_axisy\n") |
| f.write("property float z_axisz\n") |
| |
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| f.write("element phoxi_frame_params 1\n") |
| f.write("property uint32 frame_width\n") |
| f.write("property uint32 frame_height\n") |
| f.write("property uint32 frame_index\n") |
| f.write("property float frame_start_time\n") |
| f.write("property float frame_duration\n") |
| f.write("property float frame_computation_duration\n") |
| f.write("property float frame_transfer_duration\n") |
| f.write("property int32 total_scan_count\n") |
| |
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| f.write("element camera_matrix 1\n") |
| for i in range(9): |
| f.write(f"property float cm{i}\n") |
| |
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| f.write("element distortion_matrix 1\n") |
| for i in range(14): |
| f.write(f"property float dm{i}\n") |
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| f.write("element camera_resolution 1\n") |
| f.write("property float width\n") |
| f.write("property float height\n") |
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| f.write("element frame_binning 1\n") |
| f.write("property float horizontal\n") |
| f.write("property float vertical\n") |
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| f.write("end_header\n") |
| |
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| for point in points: |
| f.write(f"{point[0]} {point[1]} {point[2]}\n") |
|
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| print(True) |
|
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| if GT: write_ply(perturbed_pcd_array, f"gt_filtered.ply") |
| else: |
| write_ply(perturbed_pcd_array, f"./noisy_result/noisy_filtered_{filename}.ply") |
| write_ply(new_pcd_array,f"./noisy_raw/noisy_filtered_{filename}.ply") |
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| pcd = o3d.io.read_point_cloud("./gt_filtered.ply") |
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| o3d.io.write_point_cloud("./initialize_pcdfile/gt_filtered.pcd", pcd) |
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| print("PLY 파일이 PCD 파일로 성공적으로 변환되었습니다.") |
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| pcd = o3d.io.read_point_cloud(f"./noisy_result/noisy_filtered_{filename}.ply") |
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| o3d.io.write_point_cloud(f"./initialize_pcdfile/first_{filename}.pcd", pcd) |
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| print("PLY 파일이 PCD 파일로 성공적으로 변환되었습니다.") |
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