| import re |
| import json |
| from glob import glob |
| from omegaconf import OmegaConf |
| from joblib import Parallel, delayed, parallel_backend |
|
|
| import torch |
| from plyfile import PlyData |
| import numpy as np |
| import pandas as pd |
| from tqdm import tqdm |
|
|
| from preprocess.build import ProcessorBase |
| from preprocess.utils.label_convert import MULTISCAN_SCANNET as label_convert |
| from preprocess.utils.constant import * |
|
|
|
|
| class MultiScanProcessor(ProcessorBase): |
| def record_splits(self, scan_ids, ratio=0.8): |
| split_dir = self.save_root / 'split' |
| split_dir.mkdir(exist_ok=True) |
| if (split_dir / 'train_split.txt').exists() and (split_dir / 'val_split.txt').exists(): |
| return |
| scan_len = len(scan_ids) |
| split = { |
| 'train': [], |
| 'val': []} |
| cur_split = 'train' |
| for scan_id in tqdm(sorted(scan_ids)): |
| split[cur_split].append(scan_id) |
| if len(split['train']) > ratio*scan_len: |
| cur_split = 'val' |
| for _s, _c in split.items(): |
| with open(split_dir / f'{_s}_split.txt', 'w', encoding='utf-8') as fp: |
| fp.write('\n'.join(_c)) |
|
|
| def read_all_scans(self): |
| scan_paths = glob(str(self.data_root) + '/*') |
| scans_df = [] |
| for scan_path in scan_paths: |
| scan_id = re.findall(r"scene\_[0-9]{5}\_[0-9]{2}", scan_path)[0] |
| scene_id = '_'.join(scan_id.split('_')[:-1]) |
| row = pd.DataFrame([[scene_id, scan_id, scan_path]], |
| columns=['sceneId', 'scanId', 'scanPath']) |
| scans_df.append(row) |
| scans_df = pd.concat(scans_df) |
| return scans_df |
|
|
| def process_point_cloud(self, scan_id, plydata, annotations): |
| inst_to_label = {} |
| _x = np.asarray(plydata['vertex']['x']) |
| _y = np.asarray(plydata['vertex']['y']) |
| _z = np.asarray(plydata['vertex']['z']) |
| _nx = np.asarray(plydata['vertex']['nx']) |
| _ny = np.asarray(plydata['vertex']['ny']) |
| _nz = np.asarray(plydata['vertex']['nz']) |
| _red = plydata['vertex']['red'].astype('float64') |
| _green = plydata['vertex']['green'].astype('float64') |
| _blue = plydata['vertex']['blue'].astype('float64') |
|
|
| vertices = np.column_stack((_x, _y, _z)) |
| vertex_colors = np.column_stack((_red, _green, _blue)) |
| vertex_instance = np.zeros((vertices.shape[0])) |
| triangles = np.vstack(plydata['face'].data['vertex_indices']) |
|
|
| object_ids = plydata['face'].data['objectId'] |
| part_ids = plydata['face'].data['partId'] |
| semseg_df = pd.DataFrame({'objectId': object_ids, 'partId': part_ids}) |
|
|
| df = self.annotations_to_dataframe_obj(annotations) |
| for _, row in df.iterrows(): |
| object_id = row['objectId'] |
| assert object_id > 0, f"object id should be greater than 0, but got {object_id}" |
| object_label = row['objectLabel'].split('.')[0] |
| object_label_sn607 = label_convert[object_label] |
|
|
| condition1 = semseg_df['objectId'] == object_id |
| tri_indices = semseg_df[condition1].index.values |
| object_vertices = np.unique(triangles[tri_indices]) |
| vertex_instance[object_vertices] = object_id |
| inst_to_label[object_id] = object_label_sn607 |
|
|
| if np.max(vertex_colors) <= 1: |
| vertex_colors = vertex_colors * 255.0 |
| center_points = np.mean(vertices, axis=0) |
| center_points[2] = np.min(vertices[:, 2]) |
| vertices = vertices - center_points |
| assert vertex_colors.shape == vertices.shape |
| assert vertex_colors.shape[0] == vertex_instance.shape[0] |
|
|
| if self.check_key(self.output.pcd): |
| torch.save(inst_to_label, self.inst2label_path / f"{scan_id}.pth") |
| torch.save((vertices, vertex_colors, vertex_instance), self.pcd_path / f"{scan_id}.pth") |
|
|
| @staticmethod |
| def annotations_to_dataframe_obj(annotations): |
| objects = annotations['objects'] |
| df_list = [] |
| for obj in objects: |
| object_id = obj['objectId'] |
| object_label = obj['label'] |
| df_row = pd.DataFrame( |
| [[object_id, object_label]], |
| columns=['objectId', 'objectLabel'] |
| ) |
| df_list.append(df_row) |
| df = pd.concat(df_list) |
| return df |
|
|
| def scene_proc(self, scan_id): |
| data_root = self.data_root / scan_id |
| plydata = PlyData.read(data_root / f'{scan_id}.ply') |
| with open((data_root / f'{scan_id}.annotations.json'), "r", encoding='utf-8') as f: |
| annotations = json.load(f) |
|
|
| |
| self.process_point_cloud(scan_id, plydata, annotations) |
|
|
| def process_scans(self): |
| scans_df = self.read_all_scans() |
| scan_ids = scans_df['scanId'].unique() |
| self.log_starting_info(len(scan_ids)) |
|
|
| if self.num_workers > 1: |
| with parallel_backend('multiprocessing', n_jobs=self.num_workers): |
| Parallel()(delayed(self.scene_proc)(scan_id) for scan_id in tqdm(scan_ids)) |
| else: |
| for scan_id in tqdm(scan_ids): |
| print(scan_id) |
| self.scene_proc(scan_id) |
|
|
|
|
| if __name__ == '__main__': |
| cfg = OmegaConf.create({ |
| 'data_root': '/path/to/MultiScan', |
| 'save_root': '/output/path/to/MultiScan', |
| 'num_workers': 1, |
| 'output': { |
| 'pcd': True, |
| } |
| }) |
| processor = MultiScanProcessor(cfg) |
| processor.process_scans() |
|
|
