nbv_reconstruction/runners/inferencer.py

import os
import json
from utils.render import RenderUtil
from utils.pose import PoseUtil
from utils.pts import PtsUtil
from utils.reconstruction import ReconstructionUtil

import torch
from tqdm import tqdm
import numpy as np
import pickle

from PytorchBoot.config import ConfigManager
import PytorchBoot.namespace as namespace
import PytorchBoot.stereotype as stereotype
from PytorchBoot.factory import ComponentFactory

from PytorchBoot.dataset import BaseDataset
from PytorchBoot.runners.runner import Runner
from PytorchBoot.utils import Log
from PytorchBoot.status import status_manager

@stereotype.runner("inferencer")
class Inferencer(Runner):
    def __init__(self, config_path):
        super().__init__(config_path)
    
        self.script_path = ConfigManager.get(namespace.Stereotype.RUNNER, "blender_script_path")
        self.output_dir = ConfigManager.get(namespace.Stereotype.RUNNER, "output_dir")
        self.voxel_size = ConfigManager.get(namespace.Stereotype.RUNNER, "voxel_size")
        ''' Pipeline '''
        self.pipeline_name = self.config[namespace.Stereotype.PIPELINE]
        self.pipeline:torch.nn.Module = ComponentFactory.create(namespace.Stereotype.PIPELINE, self.pipeline_name)
        self.pipeline = self.pipeline.to(self.device)
            
        ''' Experiment '''
        self.load_experiment("nbv_evaluator")
        self.stat_result = {}

        ''' Test '''
        self.test_config = ConfigManager.get(namespace.Stereotype.RUNNER, namespace.Mode.TEST)
        self.test_dataset_name_list = self.test_config["dataset_list"]
        self.test_set_list = []
        self.test_writer_list = []
        seen_name = set()
        for test_dataset_name in self.test_dataset_name_list:
            if test_dataset_name not in seen_name:
                seen_name.add(test_dataset_name)
            else:
                raise ValueError("Duplicate test dataset name: {}".format(test_dataset_name))
            test_set: BaseDataset = ComponentFactory.create(namespace.Stereotype.DATASET, test_dataset_name)
            self.test_set_list.append(test_set)
        self.print_info()
        

    def run(self):
        Log.info("Loading from epoch {}.".format(self.current_epoch))
        self.inference()
        Log.success("Inference finished.")
        

    def inference(self):
        self.pipeline.eval()
        with torch.no_grad():
            test_set: BaseDataset
            for dataset_idx, test_set in enumerate(self.test_set_list):
                status_manager.set_progress("inference", "inferencer", f"dataset", dataset_idx, len(self.test_set_list))
                test_set_name = test_set.get_name()

                total=int(len(test_set))
                for i in range(total):
                    data = test_set.__getitem__(i)
                    status_manager.set_progress("inference", "inferencer", f"Batch[{test_set_name}]", i+1, total)
                    output = self.predict_sequence(data)
                    self.save_inference_result(test_set_name, data["scene_name"][0], output)
                    
            status_manager.set_progress("inference", "inferencer", f"dataset", len(self.test_set_list), len(self.test_set_list))
        
    def predict_sequence(self, data, cr_increase_threshold=0, max_iter=50, max_retry=5):
        scene_name = data["scene_name"][0]
        Log.info(f"Processing scene: {scene_name}")
        status_manager.set_status("inference", "inferencer", "scene", scene_name)

        ''' data for rendering '''
        scene_path = data["scene_path"][0]
        O_to_L_pose = data["O_to_L_pose"][0]
        voxel_threshold = self.voxel_size
        filter_degree = 75
        down_sampled_model_pts = data["gt_pts"]
        import ipdb; ipdb.set_trace()
        first_frame_to_world_9d = data["first_scanned_n_to_world_pose_9d"][0]
        first_frame_to_world = np.eye(4)
        first_frame_to_world[:3,:3] = PoseUtil.rotation_6d_to_matrix_numpy(first_frame_to_world_9d[:6])
        first_frame_to_world[:3,3] = first_frame_to_world_9d[6:]
        
        ''' data for inference '''
        input_data = {}
        input_data["combined_scanned_pts"] = torch.tensor(data["first_scanned_pts"][0], dtype=torch.float32).to(self.device)
        input_data["scanned_n_to_world_pose_9d"] = [torch.tensor(data["first_scanned_n_to_world_pose_9d"], dtype=torch.float32).to(self.device)]
        input_data["mode"] = namespace.Mode.TEST
        input_pts_N = input_data["combined_scanned_pts"].shape[1]
        
        first_frame_target_pts, _ = RenderUtil.render_pts(first_frame_to_world, scene_path, self.script_path, down_sampled_model_pts, voxel_threshold=voxel_threshold, filter_degree=filter_degree, nO_to_nL_pose=O_to_L_pose)
        scanned_view_pts = [first_frame_target_pts]
        last_pred_cr = self.compute_coverage_rate(scanned_view_pts, None, down_sampled_model_pts, threshold=voxel_threshold)

        retry_duplication_pose = []
        retry_no_pts_pose = []
        retry = 0
        pred_cr_seq = [last_pred_cr]
        while len(pred_cr_seq) < max_iter and retry < max_retry:
            
            output = self.pipeline(input_data)
            pred_pose_9d = output["pred_pose_9d"]
            pred_pose = torch.eye(4, device=pred_pose_9d.device)

            pred_pose[:3,:3] = PoseUtil.rotation_6d_to_matrix_tensor_batch(pred_pose_9d[:,:6])[0]
            pred_pose[:3,3] = pred_pose_9d[0,6:]
            
            try:
                new_target_pts_world, new_pts_world = RenderUtil.render_pts(pred_pose, scene_path, self.script_path, model_points_normals, voxel_threshold=voxel_threshold, filter_degree=filter_degree, nO_to_nL_pose=O_to_L_pose, require_full_scene=True)
            except Exception as e:
                Log.warning(f"Error in scene {scene_path}, {e}")
                print("current pose: ", pred_pose)
                print("curr_pred_cr: ", last_pred_cr)
                retry_no_pts_pose.append(pred_pose.cpu().numpy().tolist())
                retry += 1
                continue
            
            
            pred_cr = self.compute_coverage_rate(scanned_view_pts, new_target_pts_world, down_sampled_model_pts, threshold=voxel_threshold)
            
            print(pred_cr, last_pred_cr, " max: ", data["max_coverage_rate"])
            if pred_cr >= data["max_coverage_rate"]:
                print("max coverage rate reached!")
            if pred_cr <= last_pred_cr + cr_increase_threshold:
                retry += 1
                retry_duplication_pose.append(pred_pose.cpu().numpy().tolist())
                continue

            retry = 0
            pred_cr_seq.append(pred_cr)
            scanned_view_pts.append(new_target_pts_world)
            down_sampled_new_pts_world = PtsUtil.random_downsample_point_cloud(new_pts_world, input_pts_N)
            new_pts_world_aug = np.hstack([down_sampled_new_pts_world, np.ones((down_sampled_new_pts_world.shape[0], 1))])
            new_pts = np.dot(np.linalg.inv(first_frame_to_world.cpu()), new_pts_world_aug.T).T[:,:3]

            new_pts_tensor = torch.tensor(new_pts, dtype=torch.float32).unsqueeze(0).to(self.device)
            
            input_data["scanned_pts"] = [torch.cat([input_data["scanned_pts"][0] , new_pts_tensor], dim=0)]
            input_data["scanned_n_to_world_pose_9d"] = [torch.cat([input_data["scanned_n_to_world_pose_9d"][0], pred_pose_9d], dim=0)]
            combined_scanned_views_pts = np.concatenate(input_data["scanned_pts"][0].tolist(), axis=0)
            voxel_downsampled_combined_scanned_pts_np = PtsUtil.voxel_downsample_point_cloud(combined_scanned_views_pts, 0.002)
            random_downsampled_combined_scanned_pts_np = PtsUtil.random_downsample_point_cloud(voxel_downsampled_combined_scanned_pts_np, input_pts_N)
            input_data["combined_scanned_pts"] = torch.tensor(random_downsampled_combined_scanned_pts_np, dtype=torch.float32).unsqueeze(0).to(self.device)

            
            last_pred_cr = pred_cr

        
        input_data["scanned_pts"] = input_data["scanned_pts"][0].cpu().numpy().tolist()
        input_data["scanned_n_to_world_pose_9d"] = input_data["scanned_n_to_world_pose_9d"][0].cpu().numpy().tolist()
        result = {
            "pred_pose_9d_seq": input_data["scanned_n_to_world_pose_9d"],
            "pts_seq": input_data["scanned_pts"],
            "target_pts_seq": scanned_view_pts,
            "coverage_rate_seq": pred_cr_seq,
            "max_coverage_rate": data["max_coverage_rate"][0],
            "pred_max_coverage_rate": max(pred_cr_seq),
            "scene_name": scene_name,
            "retry_no_pts_pose": retry_no_pts_pose,
            "retry_duplication_pose": retry_duplication_pose,
            "best_seq_len": data["best_seq_len"][0],
        }
        self.stat_result[scene_name] = {
            "max_coverage_rate": data["max_coverage_rate"][0],
            "success_rate": max(pred_cr_seq)/ data["max_coverage_rate"][0],
            "coverage_rate_seq": pred_cr_seq,
            "pred_max_coverage_rate": max(pred_cr_seq),
            "pred_seq_len": len(pred_cr_seq),
        }
        print('success rate: ', max(pred_cr_seq) / data["max_coverage_rate"][0])

        return result

    def compute_coverage_rate(self, scanned_view_pts, new_pts, model_pts, threshold=0.005):
        if new_pts is not None:
            new_scanned_view_pts = scanned_view_pts + [new_pts]
        else:
            new_scanned_view_pts = scanned_view_pts
        combined_point_cloud = np.vstack(new_scanned_view_pts)
        down_sampled_combined_point_cloud = PtsUtil.voxel_downsample_point_cloud(combined_point_cloud,threshold)
        return ReconstructionUtil.compute_coverage_rate(model_pts, down_sampled_combined_point_cloud, threshold)
        

    def save_inference_result(self, dataset_name, scene_name, output):
        dataset_dir = os.path.join(self.output_dir, dataset_name)
        if not os.path.exists(dataset_dir):
            os.makedirs(dataset_dir)
        output_path = os.path.join(dataset_dir, f"{scene_name}.pkl")
        pickle.dump(output, open(output_path, "wb"))
        with open(os.path.join(dataset_dir, "stat.json"), "w") as f:
            json.dump(self.stat_result, f)
    

    def get_checkpoint_path(self, is_last=False):
        return os.path.join(self.experiment_path, namespace.Direcotry.CHECKPOINT_DIR_NAME,
                            "Epoch_{}.pth".format(
                                self.current_epoch if self.current_epoch != -1 and not is_last else "last"))

    def load_checkpoint(self, is_last=False):
        self.load(self.get_checkpoint_path(is_last))
        Log.success(f"Loaded checkpoint from {self.get_checkpoint_path(is_last)}")
        if is_last:
            checkpoint_root = os.path.join(self.experiment_path, namespace.Direcotry.CHECKPOINT_DIR_NAME)
            meta_path = os.path.join(checkpoint_root, "meta.json")
            if not os.path.exists(meta_path):
                raise FileNotFoundError(
                    "No checkpoint meta.json file in the experiment {}".format(self.experiments_config["name"]))
            file_path = os.path.join(checkpoint_root, "meta.json")
            with open(file_path, "r") as f:
                meta = json.load(f)
            self.current_epoch = meta["last_epoch"]
            self.current_iter = meta["last_iter"]

    def load_experiment(self, backup_name=None):
        super().load_experiment(backup_name)
        self.current_epoch = self.experiments_config["epoch"]
        self.load_checkpoint(is_last=(self.current_epoch == -1))

    def create_experiment(self, backup_name=None):
        super().create_experiment(backup_name)
       
        
    def load(self, path):
        state_dict = torch.load(path)
        self.pipeline.load_state_dict(state_dict)

    def print_info(self):
        def print_dataset(dataset: BaseDataset):
            config = dataset.get_config()
            name = dataset.get_name()
            Log.blue(f"Dataset: {name}")
            for k,v in config.items():
                Log.blue(f"\t{k}: {v}")

        super().print_info()
        table_size = 70
        Log.blue(f"{'+' + '-' * (table_size // 2)} Pipeline {'-' * (table_size // 2)}" + '+')
        Log.blue(self.pipeline)
        Log.blue(f"{'+' + '-' * (table_size // 2)} Datasets {'-' * (table_size // 2)}" + '+')
        for i, test_set in enumerate(self.test_set_list):
            Log.blue(f"test dataset {i}: ")
            print_dataset(test_set)

        Log.blue(f"{'+' + '-' * (table_size // 2)}----------{'-' * (table_size // 2)}" + '+')