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inter
2025-09-21 20:18:44 +08:00
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pcdet/models/detectors/mppnet.py Normal file
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import torch
from .detector3d_template import Detector3DTemplate
from pcdet.ops.iou3d_nms import iou3d_nms_utils
import os
import numpy as np
import time
from ...utils import common_utils
from ..model_utils import model_nms_utils
from pcdet.datasets.augmentor import augmentor_utils, database_sampler
class MPPNet(Detector3DTemplate):
def __init__(self, model_cfg, num_class, dataset):
super().__init__(model_cfg=model_cfg, num_class=num_class, dataset=dataset)
self.module_list = self.build_networks()
def forward(self, batch_dict):
batch_dict['proposals_list'] = batch_dict['roi_boxes']
for cur_module in self.module_list[:]:
batch_dict = cur_module(batch_dict)
if self.training:
loss, tb_dict, disp_dict = self.get_training_loss()
ret_dict = {
'loss': loss
}
return ret_dict, tb_dict, disp_dict
else:
pred_dicts, recall_dicts = self.post_processing(batch_dict)
return pred_dicts, recall_dicts
def get_training_loss(self):
disp_dict = {}
tb_dict ={}
loss_rcnn, tb_dict = self.roi_head.get_loss(tb_dict)
loss = loss_rcnn
return loss, tb_dict, disp_dict
def post_processing(self, batch_dict):
"""
Args:
batch_dict:
batch_size:
batch_cls_preds: (B, num_boxes, num_classes | 1) or (N1+N2+..., num_classes | 1)
or [(B, num_boxes, num_class1), (B, num_boxes, num_class2) ...]
multihead_label_mapping: [(num_class1), (num_class2), ...]
batch_box_preds: (B, num_boxes, 7+C) or (N1+N2+..., 7+C)
cls_preds_normalized: indicate whether batch_cls_preds is normalized
batch_index: optional (N1+N2+...)
has_class_labels: True/False
roi_labels: (B, num_rois) 1 .. num_classes
batch_pred_labels: (B, num_boxes, 1)
Returns:
"""
post_process_cfg = self.model_cfg.POST_PROCESSING
batch_size = batch_dict['batch_size']
recall_dict = {}
pred_dicts = []
for index in range(batch_size):
if batch_dict.get('batch_index', None) is not None:
assert batch_dict['batch_box_preds'].shape.__len__() == 2
batch_mask = (batch_dict['batch_index'] == index)
else:
assert batch_dict['batch_box_preds'].shape.__len__() == 3
batch_mask = index
box_preds = batch_dict['batch_box_preds'][batch_mask]
src_box_preds = box_preds
if not isinstance(batch_dict['batch_cls_preds'], list):
cls_preds = batch_dict['batch_cls_preds'][batch_mask]
src_cls_preds = cls_preds
assert cls_preds.shape[1] in [1, self.num_class]
if not batch_dict['cls_preds_normalized']:
cls_preds = torch.sigmoid(cls_preds)
else:
cls_preds = [x[batch_mask] for x in batch_dict['batch_cls_preds']]
src_cls_preds = cls_preds
if not batch_dict['cls_preds_normalized']:
cls_preds = [torch.sigmoid(x) for x in cls_preds]
if post_process_cfg.NMS_CONFIG.MULTI_CLASSES_NMS:
if not isinstance(cls_preds, list):
cls_preds = [cls_preds]
multihead_label_mapping = [torch.arange(1, self.num_class, device=cls_preds[0].device)]
else:
multihead_label_mapping = batch_dict['multihead_label_mapping']
cur_start_idx = 0
pred_scores, pred_labels, pred_boxes = [], [], []
for cur_cls_preds, cur_label_mapping in zip(cls_preds, multihead_label_mapping):
assert cur_cls_preds.shape[1] == len(cur_label_mapping)
cur_box_preds = box_preds[cur_start_idx: cur_start_idx + cur_cls_preds.shape[0]]
cur_pred_scores, cur_pred_labels, cur_pred_boxes = model_nms_utils.multi_classes_nms(
cls_scores=cur_cls_preds, box_preds=cur_box_preds,
nms_config=post_process_cfg.NMS_CONFIG,
score_thresh=post_process_cfg.SCORE_THRESH
)
cur_pred_labels = cur_label_mapping[cur_pred_labels]
pred_scores.append(cur_pred_scores)
pred_labels.append(cur_pred_labels)
pred_boxes.append(cur_pred_boxes)
cur_start_idx += cur_cls_preds.shape[0]
final_scores = torch.cat(pred_scores, dim=0)
final_labels = torch.cat(pred_labels, dim=0)
final_boxes = torch.cat(pred_boxes, dim=0)
else:
try:
cls_preds, label_preds = torch.max(cls_preds, dim=-1)
except:
record_dict = {
'pred_boxes': torch.tensor([]),
'pred_scores': torch.tensor([]),
'pred_labels': torch.tensor([])
}
pred_dicts.append(record_dict)
continue
if batch_dict.get('has_class_labels', False):
label_key = 'roi_labels' if 'roi_labels' in batch_dict else 'batch_pred_labels'
label_preds = batch_dict[label_key][index]
else:
label_preds = label_preds + 1
selected, selected_scores = model_nms_utils.class_agnostic_nms(
box_scores=cls_preds, box_preds=box_preds,
nms_config=post_process_cfg.NMS_CONFIG,
score_thresh=post_process_cfg.SCORE_THRESH
)
if post_process_cfg.OUTPUT_RAW_SCORE:
max_cls_preds, _ = torch.max(src_cls_preds, dim=-1)
selected_scores = max_cls_preds[selected]
final_scores = selected_scores
final_labels = label_preds[selected]
final_boxes = box_preds[selected]
######### Car DONOT Using NMS ######
if post_process_cfg.get('NOT_APPLY_NMS_FOR_VEL',False):
pedcyc_mask = final_labels !=1
final_scores_pedcyc = final_scores[pedcyc_mask]
final_labels_pedcyc = final_labels[pedcyc_mask]
final_boxes_pedcyc = final_boxes[pedcyc_mask]
car_mask = (label_preds==1) & (cls_preds > post_process_cfg.SCORE_THRESH)
final_scores_car = cls_preds[car_mask]
final_labels_car = label_preds[car_mask]
final_boxes_car = box_preds[car_mask]
final_scores = torch.cat([final_scores_car,final_scores_pedcyc],0)
final_labels = torch.cat([final_labels_car,final_labels_pedcyc],0)
final_boxes = torch.cat([final_boxes_car,final_boxes_pedcyc],0)
######### Car DONOT Using NMS ######
recall_dict = self.generate_recall_record(
box_preds=final_boxes if 'rois' not in batch_dict else src_box_preds,
recall_dict=recall_dict, batch_index=index, data_dict=batch_dict,
thresh_list=post_process_cfg.RECALL_THRESH_LIST
)
record_dict = {
'pred_boxes': final_boxes[:,:7],
'pred_scores': final_scores,
'pred_labels': final_labels
}
pred_dicts.append(record_dict)
return pred_dicts, recall_dict