def test_offset_tensor_to_anchor(self):
# anchor format is [x, y, z, dim_x, dim_y, dim_z]
anchors = np.asarray([[1, 2, 3, 4, 6, 5], [0, 0, 0, 2, 3, 1]],
dtype=np.float32)
anchor_tensor = \
tf.convert_to_tensor(anchors, dtype=tf.float32)
# anchor offset prediction is [tx, ty, tz, tdim_x, tdim_y, tdim_z]
anchor_offsets = np.array([[0.5, 0.02, 0.01, 0.1, 0.4, 0.03],
[0.04, 0.1, 0.03, 0.001, 0.3, 0.03]],
dtype=np.float32)
anchor_offset_tensor = \
tf.convert_to_tensor(anchor_offsets, dtype=tf.float32)
expected_anchors = np.array([[3.0, 2.12, 3.05, 4.420, 8.9509, 5.152],
[0.08, 0.3, 0.03, 2.002, 4.05, 1.03]],
dtype=np.float32)
anchors_tensor = anchor_encoder.offset_to_anchor(
anchor_tensor, anchor_offset_tensor)
sess = tf.Session()
with sess.as_default():
anchors = anchors_tensor.eval()
np.testing.assert_almost_equal(anchors,
expected_anchors,
decimal=3)
def build(self):
# Setup input placeholders
self._set_up_input_pls()
# Setup feature extractors
self._set_up_feature_extractors()
bev_proposal_input = self.bev_bottleneck
img_proposal_input = self.img_bottleneck
fusion_mean_div_factor = 2.0
# If both img and bev probabilites are set to 1.0, don't do
# path drop.
if not (self._path_drop_probabilities[0] ==
self._path_drop_probabilities[1] == 1.0):
with tf.variable_scope('rpn_path_drop'):
random_values = tf.random_uniform(shape=[3],
minval=0.0,
maxval=1.0)
img_mask, bev_mask = self.create_path_drop_masks(
self._path_drop_probabilities[0],
self._path_drop_probabilities[1], random_values)
img_proposal_input = tf.multiply(img_proposal_input, img_mask)
bev_proposal_input = tf.multiply(bev_proposal_input, bev_mask)
self.img_path_drop_mask = img_mask
self.bev_path_drop_mask = bev_mask
# Overwrite the division factor
fusion_mean_div_factor = img_mask + bev_mask
with tf.variable_scope('proposal_roi_pooling'):
with tf.variable_scope('box_indices'):
def get_box_indices(boxes):
proposals_shape = boxes.get_shape().as_list()
if any(dim is None for dim in proposals_shape):
proposals_shape = tf.shape(boxes)
ones_mat = tf.ones(proposals_shape[:2], dtype=tf.int32)
multiplier = tf.expand_dims(
tf.range(start=0, limit=proposals_shape[0]), 1)
return tf.reshape(ones_mat * multiplier, [-1])
bev_boxes_norm_batches = tf.expand_dims(
self._bev_anchors_norm_pl, axis=0)
# These should be all 0's since there is only 1 image
tf_box_indices = get_box_indices(bev_boxes_norm_batches)
# Do ROI Pooling on BEV
bev_proposal_rois = tf.image.crop_and_resize(
bev_proposal_input, self._bev_anchors_norm_pl, tf_box_indices,
self._proposal_roi_crop_size)
# Do ROI Pooling on image
img_proposal_rois = tf.image.crop_and_resize(
img_proposal_input, self._img_anchors_norm_pl, tf_box_indices,
self._proposal_roi_crop_size)
with tf.variable_scope('proposal_roi_fusion'):
rpn_fusion_out = None
if self._fusion_method == 'mean':
tf_features_sum = tf.add(bev_proposal_rois, img_proposal_rois)
rpn_fusion_out = tf.divide(tf_features_sum,
fusion_mean_div_factor)
elif self._fusion_method == 'concat':
rpn_fusion_out = tf.concat(
[bev_proposal_rois, img_proposal_rois], axis=3)
###############################
###############################
## Chenye Netgate begin ##
###############################
elif self._fusion_method == 'netgate':
print("!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!")
print("bev_proposal_rois is:", bev_proposal_rois)
rpn_fusion_out = chenye_netgate.netgate(
bev_proposal_rois, img_proposal_rois, self._is_training)
################################
## Chenye Netgate end ##
################################
else:
raise ValueError('Invalid fusion method', self._fusion_method)
# TODO: move this section into an separate AnchorPredictor class
with tf.variable_scope('anchor_predictor', 'ap', [rpn_fusion_out]):
tensor_in = rpn_fusion_out
# Parse rpn layers config
layers_config = self._config.layers_config.rpn_config
l2_weight_decay = layers_config.l2_weight_decay
if l2_weight_decay > 0:
weights_regularizer = slim.l2_regularizer(l2_weight_decay)
else:
weights_regularizer = None
with slim.arg_scope([slim.conv2d],
weights_regularizer=weights_regularizer):
# Use conv2d instead of fully_connected layers.
cls_fc6 = slim.conv2d(tensor_in,
layers_config.cls_fc6,
self._proposal_roi_crop_size,
padding='VALID',
scope='cls_fc6')
cls_fc6_drop = slim.dropout(cls_fc6,
layers_config.keep_prob,
is_training=self._is_training,
scope='cls_fc6_drop')
cls_fc7 = slim.conv2d(cls_fc6_drop,
layers_config.cls_fc7, [1, 1],
scope='cls_fc7')
cls_fc7_drop = slim.dropout(cls_fc7,
layers_config.keep_prob,
is_training=self._is_training,
scope='cls_fc7_drop')
cls_fc8 = slim.conv2d(cls_fc7_drop,
2, [1, 1],
activation_fn=None,
scope='cls_fc8')
objectness = tf.squeeze(cls_fc8, [1, 2],
name='cls_fc8/squeezed')
# Use conv2d instead of fully_connected layers.
reg_fc6 = slim.conv2d(tensor_in,
layers_config.reg_fc6,
self._proposal_roi_crop_size,
padding='VALID',
scope='reg_fc6')
reg_fc6_drop = slim.dropout(reg_fc6,
layers_config.keep_prob,
is_training=self._is_training,
scope='reg_fc6_drop')
reg_fc7 = slim.conv2d(reg_fc6_drop,
layers_config.reg_fc7, [1, 1],
scope='reg_fc7')
reg_fc7_drop = slim.dropout(reg_fc7,
layers_config.keep_prob,
is_training=self._is_training,
scope='reg_fc7_drop')
reg_fc8 = slim.conv2d(reg_fc7_drop,
6, [1, 1],
activation_fn=None,
scope='reg_fc8')
offsets = tf.squeeze(reg_fc8, [1, 2], name='reg_fc8/squeezed')
# Histogram summaries
with tf.variable_scope('histograms_feature_extractor'):
with tf.variable_scope('bev_vgg'):
for end_point in self.bev_end_points:
tf.summary.histogram(end_point,
self.bev_end_points[end_point])
with tf.variable_scope('img_vgg'):
for end_point in self.img_end_points:
tf.summary.histogram(end_point,
self.img_end_points[end_point])
with tf.variable_scope('histograms_rpn'):
with tf.variable_scope('anchor_predictor'):
fc_layers = [
cls_fc6, cls_fc7, cls_fc8, objectness, reg_fc6, reg_fc7,
reg_fc8, offsets
]
for fc_layer in fc_layers:
# fix the name to avoid tf warnings
tf.summary.histogram(fc_layer.name.replace(':', '_'),
fc_layer)
# Return the proposals
with tf.variable_scope('proposals'):
anchors = self.placeholders[self.PL_ANCHORS]
# Decode anchor regression offsets
with tf.variable_scope('decoding'):
regressed_anchors = anchor_encoder.offset_to_anchor(
anchors, offsets)
with tf.variable_scope('bev_projection'):
_, bev_proposal_boxes_norm = anchor_projector.project_to_bev(
regressed_anchors, self._bev_extents)
with tf.variable_scope('softmax'):
objectness_softmax = tf.nn.softmax(objectness)
with tf.variable_scope('nms'):
objectness_scores = objectness_softmax[:, 1]
# Do NMS on regressed anchors
top_indices = tf.image.non_max_suppression(
bev_proposal_boxes_norm,
objectness_scores,
max_output_size=self._nms_size,
iou_threshold=self._nms_iou_thresh)
top_anchors = tf.gather(regressed_anchors, top_indices)
top_objectness_softmax = tf.gather(objectness_scores,
top_indices)
# top_offsets = tf.gather(offsets, top_indices)
# top_objectness = tf.gather(objectness, top_indices)
# Get mini batch
all_ious_gt = self.placeholders[self.PL_ANCHOR_IOUS]
all_offsets_gt = self.placeholders[self.PL_ANCHOR_OFFSETS]
all_classes_gt = self.placeholders[self.PL_ANCHOR_CLASSES]
with tf.variable_scope('mini_batch'):
mini_batch_utils = self.dataset.kitti_utils.mini_batch_utils
mini_batch_mask, _ = \
mini_batch_utils.sample_rpn_mini_batch(all_ious_gt)
# ROI summary images
rpn_mini_batch_size = \
self.dataset.kitti_utils.mini_batch_utils.rpn_mini_batch_size
with tf.variable_scope('bev_rpn_rois'):
mb_bev_anchors_norm = tf.boolean_mask(self._bev_anchors_norm_pl,
mini_batch_mask)
mb_bev_box_indices = tf.zeros_like(tf.boolean_mask(
all_classes_gt, mini_batch_mask),
dtype=tf.int32)
# Show the ROIs of the BEV input density map
# for the mini batch anchors
bev_input_rois = tf.image.crop_and_resize(self._bev_preprocessed,
mb_bev_anchors_norm,
mb_bev_box_indices,
(32, 32))
bev_input_roi_summary_images = tf.split(bev_input_rois,
self._bev_depth,
axis=3)
tf.summary.image('bev_rpn_rois',
bev_input_roi_summary_images[-1],
max_outputs=rpn_mini_batch_size)
with tf.variable_scope('img_rpn_rois'):
# ROIs on image input
mb_img_anchors_norm = tf.boolean_mask(self._img_anchors_norm_pl,
mini_batch_mask)
mb_img_box_indices = tf.zeros_like(tf.boolean_mask(
all_classes_gt, mini_batch_mask),
dtype=tf.int32)
# Do test ROI pooling on mini batch
img_input_rois = tf.image.crop_and_resize(self._img_preprocessed,
mb_img_anchors_norm,
mb_img_box_indices,
(32, 32))
tf.summary.image('img_rpn_rois',
img_input_rois,
max_outputs=rpn_mini_batch_size)
# Ground Truth Tensors
with tf.variable_scope('one_hot_classes'):
# Anchor classification ground truth
# Object / Not Object
min_pos_iou = \
self.dataset.kitti_utils.mini_batch_utils.rpn_pos_iou_range[0]
objectness_classes_gt = tf.cast(tf.greater_equal(
all_ious_gt, min_pos_iou),
dtype=tf.int32)
objectness_gt = tf.one_hot(
objectness_classes_gt,
depth=2,
on_value=1.0 - self._config.label_smoothing_epsilon,
off_value=self._config.label_smoothing_epsilon)
# Mask predictions for mini batch
with tf.variable_scope('prediction_mini_batch'):
objectness_masked = tf.boolean_mask(objectness, mini_batch_mask)
offsets_masked = tf.boolean_mask(offsets, mini_batch_mask)
with tf.variable_scope('ground_truth_mini_batch'):
objectness_gt_masked = tf.boolean_mask(objectness_gt,
mini_batch_mask)
offsets_gt_masked = tf.boolean_mask(all_offsets_gt,
mini_batch_mask)
# Specify the tensors to evaluate
predictions = dict()
# Temporary predictions for debugging
# predictions['anchor_ious'] = anchor_ious
# predictions['anchor_offsets'] = all_offsets_gt
if self._train_val_test in ['train', 'val']:
# All anchors
predictions[self.PRED_ANCHORS] = anchors
# Mini-batch masks
predictions[self.PRED_MB_MASK] = mini_batch_mask
# Mini-batch predictions
predictions[self.PRED_MB_OBJECTNESS] = objectness_masked
predictions[self.PRED_MB_OFFSETS] = offsets_masked
# Mini batch ground truth
predictions[self.PRED_MB_OFFSETS_GT] = offsets_gt_masked
predictions[self.PRED_MB_OBJECTNESS_GT] = objectness_gt_masked
# Proposals after nms
predictions[self.PRED_TOP_INDICES] = top_indices
predictions[self.PRED_TOP_ANCHORS] = top_anchors
predictions[
self.PRED_TOP_OBJECTNESS_SOFTMAX] = top_objectness_softmax
else:
# self._train_val_test == 'test'
predictions[self.PRED_TOP_ANCHORS] = top_anchors
predictions[
self.PRED_TOP_OBJECTNESS_SOFTMAX] = top_objectness_softmax
return predictions, bev_proposal_rois, bev_proposal_rois
def build(self):
rpn_model = self._rpn_model
# Share the same prediction dict as RPN
prediction_dict = rpn_model.build()
top_anchors = prediction_dict[RpnModel.PRED_TOP_ANCHORS]
ground_plane = rpn_model.placeholders[RpnModel.PL_GROUND_PLANE]
class_labels = rpn_model.placeholders[RpnModel.PL_LABEL_CLASSES]
with tf.variable_scope('avod_projection'):
if self._config.expand_proposals_xz > 0.0:
expand_length = self._config.expand_proposals_xz
# Expand anchors along x and z
with tf.variable_scope('expand_xz'):
expanded_dim_x = top_anchors[:, 3] + expand_length
expanded_dim_z = top_anchors[:, 5] + expand_length
expanded_anchors = tf.stack([
top_anchors[:, 0], top_anchors[:, 1], top_anchors[:,
2],
expanded_dim_x, top_anchors[:, 4], expanded_dim_z
],
axis=1)
avod_projection_in = expanded_anchors
else:
avod_projection_in = top_anchors
with tf.variable_scope('bev'):
# Project top anchors into bev and image spaces
bev_proposal_boxes, bev_proposal_boxes_norm = \
anchor_projector.project_to_bev(
avod_projection_in,
self.dataset.kitti_utils.bev_extents)
# Reorder projected boxes into [y1, x1, y2, x2]
bev_proposal_boxes_tf_order = \
anchor_projector.reorder_projected_boxes(
bev_proposal_boxes)
bev_proposal_boxes_norm_tf_order = \
anchor_projector.reorder_projected_boxes(
bev_proposal_boxes_norm)
with tf.variable_scope('img'):
image_shape = tf.cast(
tf.shape(
rpn_model.placeholders[RpnModel.PL_IMG_INPUT])[0:2],
tf.float32)
img_proposal_boxes, img_proposal_boxes_norm = \
anchor_projector.tf_project_to_image_space(
avod_projection_in,
rpn_model.placeholders[RpnModel.PL_CALIB_P2],
image_shape)
# Only reorder the normalized img
img_proposal_boxes_norm_tf_order = \
anchor_projector.reorder_projected_boxes(
img_proposal_boxes_norm)
with tf.variable_scope('img_r'):
image_r_shape = tf.cast(
tf.shape(
rpn_model.placeholders[RpnModel.PL_IMG_R_INPUT])[0:2],
tf.float32)
img_r_proposal_boxes, img_r_proposal_boxes_norm = \
anchor_projector.tf_project_to_image_space(
avod_projection_in,
rpn_model.placeholders[RpnModel.PL_CALIB_P3],
image_r_shape)
# Only reorder the normalized img
img_r_proposal_boxes_norm_tf_order = \
anchor_projector.reorder_projected_boxes(
img_r_proposal_boxes_norm)
#bev_feature_maps = rpn_model.bev_feature_maps
img_feature_maps = rpn_model.img_feature_maps
img_r_feature_maps = rpn_model.img_r_feature_maps
"""
if not (self._path_drop_probabilities[0] ==
self._path_drop_probabilities[1] == 1.0):
with tf.variable_scope('avod_path_drop'):
img_mask = rpn_model.img_path_drop_mask
#bev_mask = rpn_model.bev_path_drop_mask
img_r_mask = rpn_model.img_r_path_drop_mask
img_feature_maps = tf.multiply(img_feature_maps,
img_mask)
#bev_feature_maps = tf.multiply(bev_feature_maps,
# bev_mask)
img_r_feature_maps = tf.multiply(img_r_feature_maps,
img_r_mask)
else:
#bev_mask = tf.constant(1.0)
img_mask = tf.constant(1.0)
img_r_mask = tf.constant(1.0)
"""
img_mask = tf.constant(1.0)
img_r_mask = tf.constant(1.0)
# ROI Pooling
with tf.variable_scope('avod_roi_pooling'):
def get_box_indices(boxes):
proposals_shape = boxes.get_shape().as_list()
if any(dim is None for dim in proposals_shape):
proposals_shape = tf.shape(boxes)
ones_mat = tf.ones(proposals_shape[:2], dtype=tf.int32)
multiplier = tf.expand_dims(
tf.range(start=0, limit=proposals_shape[0]), 1)
return tf.reshape(ones_mat * multiplier, [-1])
"""
bev_boxes_norm_batches = tf.expand_dims(
bev_proposal_boxes_norm, axis=0)
# These should be all 0's since there is only 1 image
tf_box_indices = get_box_indices(bev_boxes_norm_batches)
# Do ROI Pooling on BEV
bev_rois = tf.image.crop_and_resize(
bev_feature_maps,
bev_proposal_boxes_norm_tf_order,
tf_box_indices,
self._proposal_roi_crop_size,
name='bev_rois')
"""
img_boxes_norm_batches = tf.expand_dims(img_proposal_boxes_norm,
axis=0)
# These should be all 0's since there is only 1 image
tf_box_indices = get_box_indices(img_boxes_norm_batches)
# Do ROI Pooling on image
img_rois = tf.image.crop_and_resize(
img_feature_maps,
img_proposal_boxes_norm_tf_order,
tf_box_indices, (32, 32),
name='img_rois')
img_r_rois = tf.image.crop_and_resize(
img_r_feature_maps,
img_r_proposal_boxes_norm_tf_order,
tf_box_indices, (32, 32),
name='img_r_rois')
img_rois = self._sub_mean(img_rois)
img_r_rois = self._sub_mean(img_r_rois)
cos_simi = tf.reduce_sum(img_rois * img_r_rois, \
axis=[1, 2], keep_dims=True)
cos_simi = cos_simi / (tf.norm(img_rois + 1e-5, axis=[1, 2], keep_dims=True) * \
tf.norm(img_r_rois + 1e-5, axis=[1, 2], keep_dims=True))
cos_simi = tf.nn.relu(cos_simi)
img_rois = tf.image.resize_bilinear(
img_rois, self._proposal_roi_crop_size) * cos_simi
img_r_rois = tf.image.resize_bilinear(
img_r_rois, self._proposal_roi_crop_size) * cos_simi
# Fully connected layers (Box Predictor)
avod_layers_config = self.model_config.layers_config.avod_config
fc_output_layers = \
avod_fc_layers_builder.build(
layers_config=avod_layers_config,
input_rois=[img_rois, img_r_rois],
input_weights=[img_mask, img_r_mask],
num_final_classes=self._num_final_classes,
box_rep=self._box_rep,
top_anchors=top_anchors,
ground_plane=ground_plane,
is_training=self._is_training)
all_cls_logits = \
fc_output_layers[avod_fc_layers_builder.KEY_CLS_LOGITS]
all_offsets = fc_output_layers[avod_fc_layers_builder.KEY_OFFSETS]
# This may be None
all_angle_vectors = \
fc_output_layers.get(avod_fc_layers_builder.KEY_ANGLE_VECTORS)
with tf.variable_scope('softmax'):
all_cls_softmax = tf.nn.softmax(all_cls_logits)
######################################################
# Subsample mini_batch for the loss function
######################################################
# Get the ground truth tensors
anchors_gt = rpn_model.placeholders[RpnModel.PL_LABEL_ANCHORS]
if self._box_rep in ['box_3d', 'box_4ca']:
boxes_3d_gt = rpn_model.placeholders[RpnModel.PL_LABEL_BOXES_3D]
orientations_gt = boxes_3d_gt[:, 6]
elif self._box_rep in ['box_8c', 'box_8co', 'box_4c']:
boxes_3d_gt = rpn_model.placeholders[RpnModel.PL_LABEL_BOXES_3D]
else:
raise NotImplementedError('Ground truth tensors not implemented')
# Project anchor_gts to 2D bev
with tf.variable_scope('avod_gt_projection'):
bev_anchor_boxes_gt, _ = anchor_projector.project_to_bev(
anchors_gt, self.dataset.kitti_utils.bev_extents)
bev_anchor_boxes_gt_tf_order = \
anchor_projector.reorder_projected_boxes(bev_anchor_boxes_gt)
with tf.variable_scope('avod_box_list'):
# Convert to box_list format
anchor_box_list_gt = box_list.BoxList(bev_anchor_boxes_gt_tf_order)
anchor_box_list = box_list.BoxList(bev_proposal_boxes_tf_order)
mb_mask, mb_class_label_indices, mb_gt_indices = \
self.sample_mini_batch(
anchor_box_list_gt=anchor_box_list_gt,
anchor_box_list=anchor_box_list,
class_labels=class_labels)
# Create classification one_hot vector
with tf.variable_scope('avod_one_hot_classes'):
mb_classification_gt = tf.one_hot(
mb_class_label_indices,
depth=self._num_final_classes,
on_value=1.0 - self._config.label_smoothing_epsilon,
off_value=(self._config.label_smoothing_epsilon /
self.dataset.num_classes))
# TODO: Don't create a mini batch in test mode
# Mask predictions
with tf.variable_scope('avod_apply_mb_mask'):
# Classification
mb_classifications_logits = tf.boolean_mask(
all_cls_logits, mb_mask)
mb_classifications_softmax = tf.boolean_mask(
all_cls_softmax, mb_mask)
# Offsets
mb_offsets = tf.boolean_mask(all_offsets, mb_mask)
# Angle Vectors
if all_angle_vectors is not None:
mb_angle_vectors = tf.boolean_mask(all_angle_vectors, mb_mask)
else:
mb_angle_vectors = None
# Encode anchor offsets
with tf.variable_scope('avod_encode_mb_anchors'):
mb_anchors = tf.boolean_mask(top_anchors, mb_mask)
if self._box_rep == 'box_3d':
# Gather corresponding ground truth anchors for each mb sample
mb_anchors_gt = tf.gather(anchors_gt, mb_gt_indices)
mb_offsets_gt = anchor_encoder.tf_anchor_to_offset(
mb_anchors, mb_anchors_gt)
# Gather corresponding ground truth orientation for each
# mb sample
mb_orientations_gt = tf.gather(orientations_gt, mb_gt_indices)
elif self._box_rep in ['box_8c', 'box_8co']:
# Get boxes_3d ground truth mini-batch and convert to box_8c
mb_boxes_3d_gt = tf.gather(boxes_3d_gt, mb_gt_indices)
if self._box_rep == 'box_8c':
mb_boxes_8c_gt = \
box_8c_encoder.tf_box_3d_to_box_8c(mb_boxes_3d_gt)
elif self._box_rep == 'box_8co':
mb_boxes_8c_gt = \
box_8c_encoder.tf_box_3d_to_box_8co(mb_boxes_3d_gt)
# Convert proposals: anchors -> box_3d -> box8c
proposal_boxes_3d = \
box_3d_encoder.anchors_to_box_3d(top_anchors, fix_lw=True)
proposal_boxes_8c = \
box_8c_encoder.tf_box_3d_to_box_8c(proposal_boxes_3d)
# Get mini batch offsets
mb_boxes_8c = tf.boolean_mask(proposal_boxes_8c, mb_mask)
mb_offsets_gt = box_8c_encoder.tf_box_8c_to_offsets(
mb_boxes_8c, mb_boxes_8c_gt)
# Flatten the offsets to a (N x 24) vector
mb_offsets_gt = tf.reshape(mb_offsets_gt, [-1, 24])
elif self._box_rep in ['box_4c', 'box_4ca']:
# Get ground plane for box_4c conversion
ground_plane = self._rpn_model.placeholders[
self._rpn_model.PL_GROUND_PLANE]
# Convert gt boxes_3d -> box_4c
mb_boxes_3d_gt = tf.gather(boxes_3d_gt, mb_gt_indices)
mb_boxes_4c_gt = box_4c_encoder.tf_box_3d_to_box_4c(
mb_boxes_3d_gt, ground_plane)
# Convert proposals: anchors -> box_3d -> box_4c
proposal_boxes_3d = \
box_3d_encoder.anchors_to_box_3d(top_anchors, fix_lw=True)
proposal_boxes_4c = \
box_4c_encoder.tf_box_3d_to_box_4c(proposal_boxes_3d,
ground_plane)
# Get mini batch
mb_boxes_4c = tf.boolean_mask(proposal_boxes_4c, mb_mask)
mb_offsets_gt = box_4c_encoder.tf_box_4c_to_offsets(
mb_boxes_4c, mb_boxes_4c_gt)
if self._box_rep == 'box_4ca':
# Gather corresponding ground truth orientation for each
# mb sample
mb_orientations_gt = tf.gather(orientations_gt,
mb_gt_indices)
else:
raise NotImplementedError(
'Anchor encoding not implemented for', self._box_rep)
######################################################
# ROI summary images
######################################################
avod_mini_batch_size = \
self.dataset.kitti_utils.mini_batch_utils.avod_mini_batch_size
"""
with tf.variable_scope('bev_avod_rois'):
mb_bev_anchors_norm = tf.boolean_mask(
bev_proposal_boxes_norm_tf_order, mb_mask)
mb_bev_box_indices = tf.zeros_like(mb_gt_indices, dtype=tf.int32)
# Show the ROIs of the BEV input density map
# for the mini batch anchors
bev_input_rois = tf.image.crop_and_resize(
self._rpn_model._bev_preprocessed,
mb_bev_anchors_norm,
mb_bev_box_indices,
(32, 32))
bev_input_roi_summary_images = tf.split(
bev_input_rois, self._bev_depth, axis=3)
tf.summary.image('bev_avod_rois',
bev_input_roi_summary_images[-1],
max_outputs=avod_mini_batch_size)
"""
with tf.variable_scope('img_avod_rois'):
# ROIs on image input
mb_img_anchors_norm = tf.boolean_mask(
img_proposal_boxes_norm_tf_order, mb_mask)
mb_img_box_indices = tf.zeros_like(mb_gt_indices, dtype=tf.int32)
# Do test ROI pooling on mini batch
img_input_rois = tf.image.crop_and_resize(
self._rpn_model._img_preprocessed, mb_img_anchors_norm,
mb_img_box_indices, (32, 32))
tf.summary.image('img_avod_rois',
img_input_rois,
max_outputs=avod_mini_batch_size)
with tf.variable_scope('img_r_avod_rois'):
# ROIs on image input
mb_img_r_anchors_norm = tf.boolean_mask(
img_r_proposal_boxes_norm_tf_order, mb_mask)
mb_img_r_box_indices = tf.zeros_like(mb_gt_indices, dtype=tf.int32)
# Do test ROI pooling on mini batch
img_r_input_rois = tf.image.crop_and_resize(
self._rpn_model._img_r_preprocessed, mb_img_r_anchors_norm,
mb_img_r_box_indices, (32, 32))
tf.summary.image('img_r_avod_rois',
img_r_input_rois,
max_outputs=avod_mini_batch_size)
######################################################
# Final Predictions
######################################################
# Get orientations from angle vectors
if all_angle_vectors is not None:
with tf.variable_scope('avod_orientation'):
all_orientations = \
orientation_encoder.tf_angle_vector_to_orientation(
all_angle_vectors)
# Apply offsets to regress proposals
with tf.variable_scope('avod_regression'):
if self._box_rep == 'box_3d':
prediction_anchors = \
anchor_encoder.offset_to_anchor(top_anchors,
all_offsets)
elif self._box_rep in ['box_8c', 'box_8co']:
# Reshape the 24-dim regressed offsets to (N x 3 x 8)
reshaped_offsets = tf.reshape(all_offsets, [-1, 3, 8])
# Given the offsets, get the boxes_8c
prediction_boxes_8c = \
box_8c_encoder.tf_offsets_to_box_8c(proposal_boxes_8c,
reshaped_offsets)
# Convert corners back to box3D
prediction_boxes_3d = \
box_8c_encoder.box_8c_to_box_3d(prediction_boxes_8c)
# Convert the box_3d to anchor format for nms
prediction_anchors = \
box_3d_encoder.tf_box_3d_to_anchor(prediction_boxes_3d)
elif self._box_rep in ['box_4c', 'box_4ca']:
# Convert predictions box_4c -> box_3d
prediction_boxes_4c = \
box_4c_encoder.tf_offsets_to_box_4c(proposal_boxes_4c,
all_offsets)
prediction_boxes_3d = \
box_4c_encoder.tf_box_4c_to_box_3d(prediction_boxes_4c,
ground_plane)
# Convert to anchor format for nms
prediction_anchors = \
box_3d_encoder.tf_box_3d_to_anchor(prediction_boxes_3d)
else:
raise NotImplementedError('Regression not implemented for',
self._box_rep)
# Apply Non-oriented NMS in BEV
with tf.variable_scope('avod_nms'):
bev_extents = self.dataset.kitti_utils.bev_extents
with tf.variable_scope('bev_projection'):
# Project predictions into BEV
avod_bev_boxes, _ = anchor_projector.project_to_bev(
prediction_anchors, bev_extents)
avod_bev_boxes_tf_order = \
anchor_projector.reorder_projected_boxes(
avod_bev_boxes)
# Get top score from second column onward
all_top_scores = tf.reduce_max(all_cls_logits[:, 1:], axis=1)
# Apply NMS in BEV
nms_indices = tf.image.non_max_suppression(
avod_bev_boxes_tf_order,
all_top_scores,
max_output_size=self._nms_size,
iou_threshold=self._nms_iou_threshold)
# Gather predictions from NMS indices
top_classification_logits = tf.gather(all_cls_logits, nms_indices)
top_classification_softmax = tf.gather(all_cls_softmax,
nms_indices)
top_prediction_anchors = tf.gather(prediction_anchors, nms_indices)
if self._box_rep == 'box_3d':
top_orientations = tf.gather(all_orientations, nms_indices)
elif self._box_rep in ['box_8c', 'box_8co']:
top_prediction_boxes_3d = tf.gather(prediction_boxes_3d,
nms_indices)
top_prediction_boxes_8c = tf.gather(prediction_boxes_8c,
nms_indices)
elif self._box_rep == 'box_4c':
top_prediction_boxes_3d = tf.gather(prediction_boxes_3d,
nms_indices)
top_prediction_boxes_4c = tf.gather(prediction_boxes_4c,
nms_indices)
elif self._box_rep == 'box_4ca':
top_prediction_boxes_3d = tf.gather(prediction_boxes_3d,
nms_indices)
top_prediction_boxes_4c = tf.gather(prediction_boxes_4c,
nms_indices)
top_orientations = tf.gather(all_orientations, nms_indices)
else:
raise NotImplementedError('NMS gather not implemented for',
self._box_rep)
if self._train_val_test in ['train', 'val']:
# Additional entries are added to the shared prediction_dict
# Mini batch predictions
prediction_dict[self.PRED_MB_CLASSIFICATION_LOGITS] = \
mb_classifications_logits
prediction_dict[self.PRED_MB_CLASSIFICATION_SOFTMAX] = \
mb_classifications_softmax
prediction_dict[self.PRED_MB_OFFSETS] = mb_offsets
# Mini batch ground truth
prediction_dict[self.PRED_MB_CLASSIFICATIONS_GT] = \
mb_classification_gt
prediction_dict[self.PRED_MB_OFFSETS_GT] = mb_offsets_gt
# Top NMS predictions
prediction_dict[self.PRED_TOP_CLASSIFICATION_LOGITS] = \
top_classification_logits
prediction_dict[self.PRED_TOP_CLASSIFICATION_SOFTMAX] = \
top_classification_softmax
prediction_dict[self.PRED_TOP_PREDICTION_ANCHORS] = \
top_prediction_anchors
# Mini batch predictions (for debugging)
prediction_dict[self.PRED_MB_MASK] = mb_mask
# prediction_dict[self.PRED_MB_POS_MASK] = mb_pos_mask
prediction_dict[self.PRED_MB_CLASS_INDICES_GT] = \
mb_class_label_indices
# All predictions (for debugging)
prediction_dict[self.PRED_ALL_CLASSIFICATIONS] = \
all_cls_logits
prediction_dict[self.PRED_ALL_OFFSETS] = all_offsets
# Path drop masks (for debugging)
#prediction_dict['bev_mask'] = bev_mask
prediction_dict['img_mask'] = img_mask
prediction_dict['img_r_mask'] = img_r_mask
else:
# self._train_val_test == 'test'
prediction_dict[self.PRED_TOP_CLASSIFICATION_SOFTMAX] = \
top_classification_softmax
prediction_dict[self.PRED_TOP_PREDICTION_ANCHORS] = \
top_prediction_anchors
if self._box_rep == 'box_3d':
prediction_dict[self.PRED_MB_ANCHORS_GT] = mb_anchors_gt
prediction_dict[self.PRED_MB_ORIENTATIONS_GT] = mb_orientations_gt
prediction_dict[self.PRED_MB_ANGLE_VECTORS] = mb_angle_vectors
prediction_dict[self.PRED_TOP_ORIENTATIONS] = top_orientations
# For debugging
prediction_dict[self.PRED_ALL_ANGLE_VECTORS] = all_angle_vectors
elif self._box_rep in ['box_8c', 'box_8co']:
prediction_dict[self.PRED_TOP_PREDICTION_BOXES_3D] = \
top_prediction_boxes_3d
# Store the corners before converting for visualization purposes
prediction_dict[self.PRED_TOP_BOXES_8C] = top_prediction_boxes_8c
elif self._box_rep == 'box_4c':
prediction_dict[self.PRED_TOP_PREDICTION_BOXES_3D] = \
top_prediction_boxes_3d
prediction_dict[self.PRED_TOP_BOXES_4C] = top_prediction_boxes_4c
elif self._box_rep == 'box_4ca':
if self._train_val_test in ['train', 'val']:
prediction_dict[self.PRED_MB_ORIENTATIONS_GT] = \
mb_orientations_gt
prediction_dict[self.PRED_MB_ANGLE_VECTORS] = mb_angle_vectors
prediction_dict[self.PRED_TOP_PREDICTION_BOXES_3D] = \
top_prediction_boxes_3d
prediction_dict[self.PRED_TOP_BOXES_4C] = top_prediction_boxes_4c
prediction_dict[self.PRED_TOP_ORIENTATIONS] = top_orientations
else:
raise NotImplementedError('Prediction dict not implemented for',
self._box_rep)
# prediction_dict[self.PRED_MAX_IOUS] = max_ious
# prediction_dict[self.PRED_ALL_IOUS] = all_ious
return prediction_dict
def build(self):
rpn_model = self._rpn_model
# Share the same prediction dict as RPN
prediction_dict = rpn_model.build()
top_anchors = prediction_dict[RpnModel.PRED_TOP_ANCHORS]
ground_plane = rpn_model.placeholders[RpnModel.PL_GROUND_PLANE]
class_labels = rpn_model.placeholders[RpnModel.PL_LABEL_CLASSES]
with tf.variable_scope('avod_projection'):
if self._config.expand_proposals_xz > 0.0:
expand_length = self._config.expand_proposals_xz
# Expand anchors along x and z
with tf.variable_scope('expand_xz'):
expanded_dim_x = top_anchors[:, 3] + expand_length
expanded_dim_z = top_anchors[:, 5] + expand_length
expanded_anchors = tf.stack([
top_anchors[:, 0], top_anchors[:, 1], top_anchors[:,
2],
expanded_dim_x, top_anchors[:, 4], expanded_dim_z
],
axis=1)
avod_projection_in = expanded_anchors
else:
avod_projection_in = top_anchors
with tf.variable_scope('bev'):
# Project top anchors into bev and image spaces
# bev_proposal_boxes are boxes' x and z coordinate relative to bev_extents
# bev_proposal_boxes_norm are normalized boxes in bev_extents' range
bev_proposal_boxes, bev_proposal_boxes_norm = \
anchor_projector.project_to_bev(
avod_projection_in,
self.dataset.kitti_utils.bev_extents)
# Reorder projected boxes into [y1, x1, y2, x2]
bev_proposal_boxes_tf_order = \
anchor_projector.reorder_projected_boxes(
bev_proposal_boxes)
bev_proposal_boxes_norm_tf_order = \
anchor_projector.reorder_projected_boxes(
bev_proposal_boxes_norm)
with tf.variable_scope('img'):
image_shape = tf.cast(
tf.shape(
rpn_model.placeholders[RpnModel.PL_IMG_INPUT])[0:2],
tf.float32)
img_proposal_boxes, img_proposal_boxes_norm = \
anchor_projector.tf_project_to_image_space(
avod_projection_in,
rpn_model.placeholders[RpnModel.PL_CALIB_P2],
image_shape)
# Only reorder the normalized img
img_proposal_boxes_norm_tf_order = \
anchor_projector.reorder_projected_boxes(
img_proposal_boxes_norm)
bev_feature_maps = rpn_model.bev_feature_maps
img_feature_maps = rpn_model.img_feature_maps
if not (self._path_drop_probabilities[0] ==
self._path_drop_probabilities[1] == 1.0):
with tf.variable_scope('avod_path_drop'):
img_mask = rpn_model.img_path_drop_mask
bev_mask = rpn_model.bev_path_drop_mask
img_feature_maps = tf.multiply(img_feature_maps, img_mask)
bev_feature_maps = tf.multiply(bev_feature_maps, bev_mask)
else:
bev_mask = tf.constant(1.0)
img_mask = tf.constant(1.0)
# ROI Pooling
with tf.variable_scope('avod_roi_pooling'):
def get_box_indices(boxes):
proposals_shape = boxes.get_shape().as_list()
if any(dim is None for dim in proposals_shape):
proposals_shape = tf.shape(boxes)
ones_mat = tf.ones(proposals_shape[:2], dtype=tf.int32)
multiplier = tf.expand_dims(
tf.range(start=0, limit=proposals_shape[0]), 1)
return tf.reshape(ones_mat * multiplier, [-1])
bev_boxes_norm_batches = tf.expand_dims(bev_proposal_boxes_norm,
axis=0)
# These should be all 0's since there is only 1 image
tf_box_indices = get_box_indices(bev_boxes_norm_batches)
# Do ROI Pooling on BEV
# tf_box_indices contains 1D tensor with size [num_boxes], each element specifies
# batch index to whom this box belongs. Because the batch size here is 1, so it
# doesn't matter
# bev_rois is a 4-D tensor of shape [num_boxes, crop_height, crop_width, depth]
####################################################################################
# TODO PROJECT: set bev_feature_maps or img_feature_maps to zeros for testing
# bev_feature_maps = tf.zeros_like(bev_feature_maps)
# self.bev_feature_maps = tf.zeros_like(bev_feature_maps)
# bev_feature_maps = self.bev_feature_maps
####################################################################################
bev_rois = tf.image.crop_and_resize(
bev_feature_maps,
bev_proposal_boxes_norm_tf_order,
tf_box_indices,
self._proposal_roi_crop_size,
name='bev_rois')
# Do ROI Pooling on image
img_rois = tf.image.crop_and_resize(
img_feature_maps,
img_proposal_boxes_norm_tf_order,
tf_box_indices,
self._proposal_roi_crop_size,
name='img_rois')
####################################################################################
# TODO PROJECT: create member variables for accessing
# bev_rois4moe = tf.image.crop_and_resize(
# bev_feature_maps,
# bev_proposal_boxes_norm_tf_order,
# tf_box_indices,
# [28,28],
# name='bev_rois4moe')
# # Do ROI Pooling on image
# img_rois4moe = tf.image.crop_and_resize(
# img_feature_maps,
# img_proposal_boxes_norm_tf_order,
# tf_box_indices,
# [28,28],
# name='img_rois4moe')
####################################################################################
####################################################################################
# TODO PROJECT: create member variables for accessing
# self.bev_rois = bev_rois
# self.img_rois = img_rois
self.bev_boxes = bev_proposal_boxes_tf_order
self.bev_boxes_norm = bev_proposal_boxes_norm
self.img_boxes = img_proposal_boxes
self.img_boxes_norm = img_proposal_boxes_norm
# self.bev_mask = rpn_model.bev_path_drop_mask
# self.img_mask = rpn_model.img_path_drop_mask
####################################################################################
####################################################################################
# TODO PROJECT: scale the features to features with larger maximum values
# self.max_img_feature_val = tf.reduce_max(img_rois, axis=None)
# self.max_bev_feature_val = tf.reduce_max(bev_rois, axis=None)
#
# bev_rois_moe = tf.cond(tf.greater(self.max_img_feature_val, self.max_bev_feature_val),
# lambda: self.scale_bev(bev_rois, img_rois),
# lambda: bev_rois)
# img_rois_moe = tf.cond(tf.greater(self.max_bev_feature_val, self.max_img_feature_val),
# lambda: self.scale_img(bev_rois, img_rois),
# lambda: img_rois)
####################################################################################
####################################################################################
# TODO PROJECT: insert code here to add mixture of experts
# self._moe_model = MoeModel(img_rois, bev_rois, img_proposal_boxes, bev_proposal_boxes)
# self._moe_model = MoeModel(img_feature_maps, bev_feature_maps, img_proposal_boxes, bev_proposal_boxes)
# self._moe_model._set_up_input_pls()
# self.moe_prediction = self._moe_model.build()
####################################################################################
####################################################################################
# TODO PROJECT: weight the feature before average img and bev
# img_weights = tf.reshape(self.moe_prediction['img_weight'],[-1,1,1,1])
# bev_weights = tf.reshape(self.moe_prediction['bev_weight'],[-1,1,1,1])
# img_weights = 0.5 * tf.ones([1024,1,1,1], tf.float32)
# bev_weights = 0.5 * tf.ones([1024,1,1,1], tf.float32)
# weighted_img_rois = tf.multiply(img_weights,img_rois)
# weighted_bev_rois = tf.multiply(bev_weights,bev_rois)
####################################################################################
####################################################################################
# TODO PROJECT: create fused bev
_, bev_mar_boxes_norm = cf.add_margin_to_regions(
bev_proposal_boxes, self.dataset.kitti_utils.bev_extents)
bev_pixels_loc = cf.bev_pixel_eq_1_loc(
self._rpn_model._bev_preprocessed)
max_height = self.dataset.config.kitti_utils_config.bev_generator.slices.height_hi
min_height = self.dataset.config.kitti_utils_config.bev_generator.slices.height_lo
num_slices = self.dataset.config.kitti_utils_config.bev_generator.slices.num_slices
height_list = [
min_height + (2 * x + 1) * (max_height - min_height) /
(2.0 * num_slices) for x in range(num_slices)
]
print("bev_preprocess shape: ",
(self._rpn_model._bev_preprocessed).shape)
velo_pc = cf.bev_pixel_loc_to_3d_velo(
bev_pixels_loc,
tf.shape(self._rpn_model._bev_preprocessed)[1:3], height_list,
self.dataset.kitti_utils.bev_extents)
print("PL_CALIB_P2 shape: ",
self._rpn_model.placeholders[RpnModel.PL_CALIB_P2].shape)
p_2d = anchor_projector.project_to_image_tensor(
tf.transpose(tf.cast(velo_pc, tf.float32)),
self._rpn_model.placeholders[RpnModel.PL_CALIB_P2])
print("image feature maps [0] shape: ", img_feature_maps[0].shape)
features_at_p_2d = tf.gather_nd(
img_feature_maps[0], tf.cast(tf.round(tf.transpose(p_2d)),
tf.int32))
print("features_at_p_2d shape: ", features_at_p_2d.shape)
new_bev = cf.create_fused_bev(
tf.shape(self._rpn_model._bev_preprocessed), bev_pixels_loc,
features_at_p_2d)
# raise Exception("finish fused_bev generation!")
self._new_bev_feature_extractor = feature_extractor_builder.get_extractor(
self.model_config.layers_config.bev_feature_extractor)
self.new_bev_feature_maps, self.new_bev_end_points = \
self._new_bev_feature_extractor.build(
new_bev,
self._bev_pixel_size,
self._is_training,
scope='new_bev_vgg'
)
new_bev_rois = tf.image.crop_and_resize(
self.new_bev_feature_maps,
bev_proposal_boxes_norm_tf_order,
tf_box_indices,
self._proposal_roi_crop_size,
name='new_bev_rois')
####################################################################################
# Fully connected layers (Box Predictor)
avod_layers_config = self.model_config.layers_config.avod_config
# fc_output_layers = \
# avod_fc_layers_builder.build(
# layers_config=avod_layers_config,
# input_rois=[bev_rois, img_rois],
# input_weights=[bev_mask, img_mask],
# num_final_classes=self._num_final_classes,
# box_rep=self._box_rep,
# top_anchors=top_anchors,
# ground_plane=ground_plane,
# is_training=self._is_training)
####################################################################################
# TODO PROJECT: average img and bev features first and then concat with new bev
rois_sum = tf.reduce_sum([bev_rois, img_rois], axis=0)
rois_mean = tf.divide(rois_sum, tf.reduce_sum([bev_mask, img_mask]))
fc_output_layers = \
avod_fc_layers_builder.build(
layers_config=avod_layers_config,
input_rois=[rois_mean, new_bev_rois],
input_weights=[1, img_mask],
num_final_classes=self._num_final_classes,
box_rep=self._box_rep,
top_anchors=top_anchors,
ground_plane=ground_plane,
is_training=self._is_training)
####################################################################################
####################################################################################
# TODO PROJECT: input weighted bev_rois and img_rois to output layer
# fc_output_layers = \
# avod_fc_layers_builder.build(
# layers_config=avod_layers_config,
# input_rois=[weighted_bev_rois, weighted_img_rois],
# input_weights=[bev_mask * bev_weights, img_mask * img_weights],
# num_final_classes=self._num_final_classes,
# box_rep=self._box_rep,
# top_anchors=top_anchors,
# ground_plane=ground_plane,
# is_training=self._is_training)
####################################################################################
all_cls_logits = \
fc_output_layers[avod_fc_layers_builder.KEY_CLS_LOGITS]
all_offsets = fc_output_layers[avod_fc_layers_builder.KEY_OFFSETS]
# This may be None
all_angle_vectors = \
fc_output_layers.get(avod_fc_layers_builder.KEY_ANGLE_VECTORS)
with tf.variable_scope('softmax'):
all_cls_softmax = tf.nn.softmax(all_cls_logits)
######################################################
# Subsample mini_batch for the loss function
######################################################
# Get the ground truth tensors
anchors_gt = rpn_model.placeholders[RpnModel.PL_LABEL_ANCHORS]
if self._box_rep in ['box_3d', 'box_4ca']:
boxes_3d_gt = rpn_model.placeholders[RpnModel.PL_LABEL_BOXES_3D]
orientations_gt = boxes_3d_gt[:, 6]
elif self._box_rep in ['box_8c', 'box_8co', 'box_4c']:
boxes_3d_gt = rpn_model.placeholders[RpnModel.PL_LABEL_BOXES_3D]
else:
raise NotImplementedError('Ground truth tensors not implemented')
# Project anchor_gts to 2D bev
with tf.variable_scope('avod_gt_projection'):
bev_anchor_boxes_gt, _ = anchor_projector.project_to_bev(
anchors_gt, self.dataset.kitti_utils.bev_extents)
bev_anchor_boxes_gt_tf_order = \
anchor_projector.reorder_projected_boxes(bev_anchor_boxes_gt)
with tf.variable_scope('avod_box_list'):
# Convert to box_list format
anchor_box_list_gt = box_list.BoxList(bev_anchor_boxes_gt_tf_order)
anchor_box_list = box_list.BoxList(bev_proposal_boxes_tf_order)
mb_mask, mb_class_label_indices, mb_gt_indices = \
self.sample_mini_batch(
anchor_box_list_gt=anchor_box_list_gt,
anchor_box_list=anchor_box_list,
class_labels=class_labels)
# Create classification one_hot vector
with tf.variable_scope('avod_one_hot_classes'):
mb_classification_gt = tf.one_hot(
mb_class_label_indices,
depth=self._num_final_classes,
on_value=1.0 - self._config.label_smoothing_epsilon,
off_value=(self._config.label_smoothing_epsilon /
self.dataset.num_classes))
# TODO: Don't create a mini batch in test mode
# Mask predictions
with tf.variable_scope('avod_apply_mb_mask'):
# Classification
mb_classifications_logits = tf.boolean_mask(
all_cls_logits, mb_mask)
mb_classifications_softmax = tf.boolean_mask(
all_cls_softmax, mb_mask)
# Offsets
mb_offsets = tf.boolean_mask(all_offsets, mb_mask)
# Angle Vectors
if all_angle_vectors is not None:
mb_angle_vectors = tf.boolean_mask(all_angle_vectors, mb_mask)
else:
mb_angle_vectors = None
# Encode anchor offsets
with tf.variable_scope('avod_encode_mb_anchors'):
mb_anchors = tf.boolean_mask(top_anchors, mb_mask)
if self._box_rep == 'box_3d':
# Gather corresponding ground truth anchors for each mb sample
mb_anchors_gt = tf.gather(anchors_gt, mb_gt_indices)
mb_offsets_gt = anchor_encoder.tf_anchor_to_offset(
mb_anchors, mb_anchors_gt)
# Gather corresponding ground truth orientation for each
# mb sample
mb_orientations_gt = tf.gather(orientations_gt, mb_gt_indices)
elif self._box_rep in ['box_8c', 'box_8co']:
# Get boxes_3d ground truth mini-batch and convert to box_8c
mb_boxes_3d_gt = tf.gather(boxes_3d_gt, mb_gt_indices)
if self._box_rep == 'box_8c':
mb_boxes_8c_gt = \
box_8c_encoder.tf_box_3d_to_box_8c(mb_boxes_3d_gt)
elif self._box_rep == 'box_8co':
mb_boxes_8c_gt = \
box_8c_encoder.tf_box_3d_to_box_8co(mb_boxes_3d_gt)
# Convert proposals: anchors -> box_3d -> box8c
proposal_boxes_3d = \
box_3d_encoder.anchors_to_box_3d(top_anchors, fix_lw=True)
proposal_boxes_8c = \
box_8c_encoder.tf_box_3d_to_box_8c(proposal_boxes_3d)
# Get mini batch offsets
mb_boxes_8c = tf.boolean_mask(proposal_boxes_8c, mb_mask)
mb_offsets_gt = box_8c_encoder.tf_box_8c_to_offsets(
mb_boxes_8c, mb_boxes_8c_gt)
# Flatten the offsets to a (N x 24) vector
mb_offsets_gt = tf.reshape(mb_offsets_gt, [-1, 24])
elif self._box_rep in ['box_4c', 'box_4ca']:
# Get ground plane for box_4c conversion
ground_plane = self._rpn_model.placeholders[
self._rpn_model.PL_GROUND_PLANE]
# Convert gt boxes_3d -> box_4c
mb_boxes_3d_gt = tf.gather(boxes_3d_gt, mb_gt_indices)
mb_boxes_4c_gt = box_4c_encoder.tf_box_3d_to_box_4c(
mb_boxes_3d_gt, ground_plane)
# Convert proposals: anchors -> box_3d -> box_4c
proposal_boxes_3d = \
box_3d_encoder.anchors_to_box_3d(top_anchors, fix_lw=True)
proposal_boxes_4c = \
box_4c_encoder.tf_box_3d_to_box_4c(proposal_boxes_3d,
ground_plane)
# Get mini batch
mb_boxes_4c = tf.boolean_mask(proposal_boxes_4c, mb_mask)
mb_offsets_gt = box_4c_encoder.tf_box_4c_to_offsets(
mb_boxes_4c, mb_boxes_4c_gt)
if self._box_rep == 'box_4ca':
# Gather corresponding ground truth orientation for each
# mb sample
mb_orientations_gt = tf.gather(orientations_gt,
mb_gt_indices)
else:
raise NotImplementedError(
'Anchor encoding not implemented for', self._box_rep)
######################################################
# ROI summary images
######################################################
avod_mini_batch_size = \
self.dataset.kitti_utils.mini_batch_utils.avod_mini_batch_size
with tf.variable_scope('bev_avod_rois'):
mb_bev_anchors_norm = tf.boolean_mask(
bev_proposal_boxes_norm_tf_order, mb_mask)
mb_bev_box_indices = tf.zeros_like(mb_gt_indices, dtype=tf.int32)
# Show the ROIs of the BEV input density map
# for the mini batch anchors
bev_input_rois = tf.image.crop_and_resize(
self._rpn_model._bev_preprocessed, mb_bev_anchors_norm,
mb_bev_box_indices, (32, 32))
bev_input_roi_summary_images = tf.split(bev_input_rois,
self._bev_depth,
axis=3)
tf.summary.image('bev_avod_rois',
bev_input_roi_summary_images[-1],
max_outputs=avod_mini_batch_size)
with tf.variable_scope('img_avod_rois'):
# ROIs on image input
mb_img_anchors_norm = tf.boolean_mask(
img_proposal_boxes_norm_tf_order, mb_mask)
mb_img_box_indices = tf.zeros_like(mb_gt_indices, dtype=tf.int32)
# Do test ROI pooling on mini batch
img_input_rois = tf.image.crop_and_resize(
self._rpn_model._img_preprocessed, mb_img_anchors_norm,
mb_img_box_indices, (32, 32))
tf.summary.image('img_avod_rois',
img_input_rois,
max_outputs=avod_mini_batch_size)
######################################################
# Final Predictions
######################################################
# Get orientations from angle vectors
if all_angle_vectors is not None:
with tf.variable_scope('avod_orientation'):
all_orientations = \
orientation_encoder.tf_angle_vector_to_orientation(
all_angle_vectors)
# Apply offsets to regress proposals
with tf.variable_scope('avod_regression'):
if self._box_rep == 'box_3d':
prediction_anchors = \
anchor_encoder.offset_to_anchor(top_anchors,
all_offsets)
elif self._box_rep in ['box_8c', 'box_8co']:
# Reshape the 24-dim regressed offsets to (N x 3 x 8)
reshaped_offsets = tf.reshape(all_offsets, [-1, 3, 8])
# Given the offsets, get the boxes_8c
prediction_boxes_8c = \
box_8c_encoder.tf_offsets_to_box_8c(proposal_boxes_8c,
reshaped_offsets)
# Convert corners back to box3D
prediction_boxes_3d = \
box_8c_encoder.box_8c_to_box_3d(prediction_boxes_8c)
# Convert the box_3d to anchor format for nms
prediction_anchors = \
box_3d_encoder.tf_box_3d_to_anchor(prediction_boxes_3d)
elif self._box_rep in ['box_4c', 'box_4ca']:
# Convert predictions box_4c -> box_3d
prediction_boxes_4c = \
box_4c_encoder.tf_offsets_to_box_4c(proposal_boxes_4c,
all_offsets)
prediction_boxes_3d = \
box_4c_encoder.tf_box_4c_to_box_3d(prediction_boxes_4c,
ground_plane)
# Convert to anchor format for nms
prediction_anchors = \
box_3d_encoder.tf_box_3d_to_anchor(prediction_boxes_3d)
else:
raise NotImplementedError('Regression not implemented for',
self._box_rep)
# Apply Non-oriented NMS in BEV
with tf.variable_scope('avod_nms'):
bev_extents = self.dataset.kitti_utils.bev_extents
with tf.variable_scope('bev_projection'):
# Project predictions into BEV
avod_bev_boxes, _ = anchor_projector.project_to_bev(
prediction_anchors, bev_extents)
avod_bev_boxes_tf_order = \
anchor_projector.reorder_projected_boxes(
avod_bev_boxes)
# Get top score from second column onward
all_top_scores = tf.reduce_max(all_cls_logits[:, 1:], axis=1)
# Apply NMS in BEV
nms_indices = tf.image.non_max_suppression(
avod_bev_boxes_tf_order,
all_top_scores,
max_output_size=self._nms_size,
iou_threshold=self._nms_iou_threshold)
# Gather predictions from NMS indices
top_classification_logits = tf.gather(all_cls_logits, nms_indices)
top_classification_softmax = tf.gather(all_cls_softmax,
nms_indices)
top_prediction_anchors = tf.gather(prediction_anchors, nms_indices)
if self._box_rep == 'box_3d':
top_orientations = tf.gather(all_orientations, nms_indices)
elif self._box_rep in ['box_8c', 'box_8co']:
top_prediction_boxes_3d = tf.gather(prediction_boxes_3d,
nms_indices)
top_prediction_boxes_8c = tf.gather(prediction_boxes_8c,
nms_indices)
elif self._box_rep == 'box_4c':
top_prediction_boxes_3d = tf.gather(prediction_boxes_3d,
nms_indices)
top_prediction_boxes_4c = tf.gather(prediction_boxes_4c,
nms_indices)
elif self._box_rep == 'box_4ca':
top_prediction_boxes_3d = tf.gather(prediction_boxes_3d,
nms_indices)
top_prediction_boxes_4c = tf.gather(prediction_boxes_4c,
nms_indices)
top_orientations = tf.gather(all_orientations, nms_indices)
else:
raise NotImplementedError('NMS gather not implemented for',
self._box_rep)
if self._train_val_test in ['train', 'val']:
# Additional entries are added to the shared prediction_dict
# Mini batch predictions
prediction_dict[self.PRED_MB_CLASSIFICATION_LOGITS] = \
mb_classifications_logits
prediction_dict[self.PRED_MB_CLASSIFICATION_SOFTMAX] = \
mb_classifications_softmax
prediction_dict[self.PRED_MB_OFFSETS] = mb_offsets
# Mini batch ground truth
prediction_dict[self.PRED_MB_CLASSIFICATIONS_GT] = \
mb_classification_gt
prediction_dict[self.PRED_MB_OFFSETS_GT] = mb_offsets_gt
# Top NMS predictions
prediction_dict[self.PRED_TOP_CLASSIFICATION_LOGITS] = \
top_classification_logits
prediction_dict[self.PRED_TOP_CLASSIFICATION_SOFTMAX] = \
top_classification_softmax
prediction_dict[self.PRED_TOP_PREDICTION_ANCHORS] = \
top_prediction_anchors
# Mini batch predictions (for debugging)
prediction_dict[self.PRED_MB_MASK] = mb_mask
# prediction_dict[self.PRED_MB_POS_MASK] = mb_pos_mask
prediction_dict[self.PRED_MB_CLASS_INDICES_GT] = \
mb_class_label_indices
# All predictions (for debugging)
prediction_dict[self.PRED_ALL_CLASSIFICATIONS] = \
all_cls_logits
prediction_dict[self.PRED_ALL_OFFSETS] = all_offsets
# Path drop masks (for debugging)
prediction_dict['bev_mask'] = bev_mask
prediction_dict['img_mask'] = img_mask
else:
# self._train_val_test == 'test'
prediction_dict[self.PRED_TOP_CLASSIFICATION_SOFTMAX] = \
top_classification_softmax
prediction_dict[self.PRED_TOP_PREDICTION_ANCHORS] = \
top_prediction_anchors
if self._box_rep == 'box_3d':
prediction_dict[self.PRED_MB_ANCHORS_GT] = mb_anchors_gt
prediction_dict[self.PRED_MB_ORIENTATIONS_GT] = mb_orientations_gt
prediction_dict[self.PRED_MB_ANGLE_VECTORS] = mb_angle_vectors
prediction_dict[self.PRED_TOP_ORIENTATIONS] = top_orientations
# For debugging
prediction_dict[self.PRED_ALL_ANGLE_VECTORS] = all_angle_vectors
# 8c means 8 corners
elif self._box_rep in ['box_8c', 'box_8co']:
prediction_dict[self.PRED_TOP_PREDICTION_BOXES_3D] = \
top_prediction_boxes_3d
# Store the corners before converting for visualization purposes
prediction_dict[self.PRED_TOP_BOXES_8C] = top_prediction_boxes_8c
# 4c means 4 corners
elif self._box_rep == 'box_4c':
prediction_dict[self.PRED_TOP_PREDICTION_BOXES_3D] = \
top_prediction_boxes_3d
prediction_dict[self.PRED_TOP_BOXES_4C] = top_prediction_boxes_4c
elif self._box_rep == 'box_4ca':
if self._train_val_test in ['train', 'val']:
prediction_dict[self.PRED_MB_ORIENTATIONS_GT] = \
mb_orientations_gt
prediction_dict[self.PRED_MB_ANGLE_VECTORS] = mb_angle_vectors
prediction_dict[self.PRED_TOP_PREDICTION_BOXES_3D] = \
top_prediction_boxes_3d
prediction_dict[self.PRED_TOP_BOXES_4C] = top_prediction_boxes_4c
prediction_dict[self.PRED_TOP_ORIENTATIONS] = top_orientations
else:
raise NotImplementedError('Prediction dict not implemented for',
self._box_rep)
# prediction_dict[self.PRED_MAX_IOUS] = max_ious
# prediction_dict[self.PRED_ALL_IOUS] = all_ious
return prediction_dict
def build(self):
# Setup input placeholders
self._set_up_input_pls()
# Setup feature extractors
self._set_up_feature_extractors()
bev_proposal_input = self.bev_feature_maps
img_proposal_input = self.img_feature_maps
fusion_mean_div_factor = 2.0
# If both img and bev probabilites are set to 1.0, don't do
# path drop.
if not (self._path_drop_probabilities[0] ==
self._path_drop_probabilities[1] == 1.0):
with tf.variable_scope('rpn_path_drop'):
random_values = tf.random_uniform(shape=[3],
minval=0.0,
maxval=1.0)
img_mask, bev_mask = self.create_path_drop_masks(
self._path_drop_probabilities[0],
self._path_drop_probabilities[1],
random_values)
img_proposal_input = tf.multiply(img_proposal_input,
img_mask)
bev_proposal_input = tf.multiply(bev_proposal_input,
bev_mask)
self.img_path_drop_mask = img_mask
self.bev_path_drop_mask = bev_mask
# Overwrite the division factor
fusion_mean_div_factor = img_mask + bev_mask
with tf.variable_scope('proposal_roi_pooling'):
with tf.variable_scope('box_indices'):
def get_box_indices(boxes):
proposals_shape = boxes.get_shape().as_list()
if any(dim is None for dim in proposals_shape):
proposals_shape = tf.shape(boxes)
ones_mat = tf.ones(proposals_shape[:2], dtype=tf.int32)
multiplier = tf.expand_dims(
tf.range(start=0, limit=proposals_shape[0]), 1)
return tf.reshape(ones_mat * multiplier, [-1])
bev_boxes_norm_batches = tf.expand_dims(
self._bev_anchors_norm_pl, axis=0)
# These should be all 0's since there is only 1 image
tf_box_indices = get_box_indices(bev_boxes_norm_batches)
# Do ROI Pooling on BEV
bev_proposal_rois = tf.image.crop_and_resize(
bev_proposal_input,
self._bev_anchors_norm_pl,
tf_box_indices,
self._proposal_roi_crop_size)
# Do ROI Pooling on image
img_proposal_rois = tf.image.crop_and_resize(
img_proposal_input,
self._img_anchors_norm_pl,
tf_box_indices,
self._proposal_roi_crop_size)
# Fully connected layers (Box Predictor)
avod_layers_config = self.model_config.layers_config.avod_config
with tf.variable_scope('proposal_roi_fusion'):
feat_fusion_out = None
fc_layers_type = avod_layers_config.WhichOneof('fc_layers')
if fc_layers_type == 'basic_fc_layers':
fusion_method = \
avod_layers_config.basic_fc_layers.fusion_method
elif fc_layers_type == 'fusion_fc_layers':
fusion_method = \
avod_layers_config.fusion_fc_layers.fusion_method
if fusion_method == 'mean':
tf_features_sum = tf.add(bev_proposal_rois, img_proposal_rois)
feat_fusion_out = tf.divide(tf_features_sum,
fusion_mean_div_factor)
elif fusion_method == 'concat':
feat_fusion_out = tf.concat(
[bev_proposal_rois, img_proposal_rois], axis=3)
else:
raise ValueError('Invalid fusion method', self._fusion_method)
all_anchors = self.placeholders[self.PL_ANCHORS]
ground_plane = self.placeholders[self.PL_GROUND_PLANE]
fc_output_layers = \
avod_fc_layers_builder.build(
layers_config=avod_layers_config,
input_rois=[feat_fusion_out],
input_weights=[1.0],
num_final_classes=self._num_final_classes,
box_rep=self._box_rep,
top_anchors=all_anchors,
ground_plane=ground_plane,
is_training=self._is_training)
all_cls_logits = \
fc_output_layers[avod_fc_layers_builder.KEY_CLS_LOGITS]
all_offsets = fc_output_layers[avod_fc_layers_builder.KEY_OFFSETS]
# This may be None
all_angle_vectors = \
fc_output_layers.get(avod_fc_layers_builder.KEY_ANGLE_VECTORS)
with tf.variable_scope('softmax'):
all_cls_softmax = tf.nn.softmax(
all_cls_logits)
######################################################
# Subsample mini_batch for the loss function
######################################################
# Get the ground truth tensors
anchors_gt = self.placeholders[self.PL_LABEL_ANCHORS]
if self._box_rep in ['box_3d', 'box_4ca']:
boxes_3d_gt = self.placeholders[self.PL_LABEL_BOXES_3D]
orientations_gt = boxes_3d_gt[:, 6]
elif self._box_rep in ['box_8c', 'box_8co', 'box_4c']:
boxes_3d_gt = self.placeholders[self.PL_LABEL_BOXES_3D]
else:
raise NotImplementedError('Ground truth tensors not implemented')
if self._train_val_test in ['train', 'val']:
with tf.variable_scope('bev'):
# Project all anchors into bev and image spaces
bev_proposal_boxes, bev_proposal_boxes_norm = \
anchor_projector.project_to_bev(
all_anchors,
self.dataset.kitti_utils.bev_extents)
# Reorder projected boxes into [y1, x1, y2, x2]
bev_proposal_boxes_tf_order = \
anchor_projector.reorder_projected_boxes(
bev_proposal_boxes)
with tf.variable_scope('img'):
image_shape = tf.cast(tf.shape(
self.placeholders[self.PL_IMG_INPUT])[0:2],
tf.float32)
img_proposal_boxes, img_proposal_boxes_norm = \
anchor_projector.tf_project_to_image_space(
all_anchors,
self.placeholders[self.PL_CALIB_P2],
image_shape)
# Project anchor_gts to 2D bev
with tf.variable_scope('avod_gt_projection'):
bev_anchor_boxes_gt, _ = anchor_projector.project_to_bev(
anchors_gt, self.dataset.kitti_utils.bev_extents)
bev_anchor_boxes_gt_tf_order = \
anchor_projector.reorder_projected_boxes(
bev_anchor_boxes_gt)
with tf.variable_scope('avod_box_list'):
# Convert to box_list format
anchor_box_list_gt = \
box_list.BoxList(bev_anchor_boxes_gt_tf_order)
anchor_box_list = \
box_list.BoxList(bev_proposal_boxes_tf_order)
class_labels = self.placeholders[self.PL_LABEL_CLASSES]
mb_mask, mb_class_label_indices, mb_gt_indices = \
self.sample_mini_batch(
anchor_box_list_gt=anchor_box_list_gt,
anchor_box_list=anchor_box_list,
class_labels=class_labels)
# Create classification one_hot vector
with tf.variable_scope('avod_one_hot_classes'):
mb_classification_gt = tf.one_hot(
mb_class_label_indices,
depth=self._num_final_classes,
on_value=1.0 - self._config.label_smoothing_epsilon,
off_value=(self._config.label_smoothing_epsilon /
self.dataset.num_classes))
# Mask predictions
with tf.variable_scope('avod_apply_mb_mask'):
# Classification
mb_classifications_logits = tf.boolean_mask(
all_cls_logits, mb_mask)
mb_classifications_softmax = tf.boolean_mask(
all_cls_softmax, mb_mask)
# Offsets
mb_offsets = tf.boolean_mask(all_offsets, mb_mask)
# Angle Vectors
if all_angle_vectors is not None:
mb_angle_vectors = tf.boolean_mask(
all_angle_vectors, mb_mask)
else:
mb_angle_vectors = None
# Encode anchor offsets
with tf.variable_scope('avod_encode_mb_anchors'):
mb_anchors = tf.boolean_mask(all_anchors, mb_mask)
if self._box_rep == 'box_3d':
# Gather corresponding ground truth anchors for each mb
# sample
mb_anchors_gt = tf.gather(anchors_gt, mb_gt_indices)
mb_offsets_gt = anchor_encoder.tf_anchor_to_offset(
mb_anchors, mb_anchors_gt)
# Gather corresponding ground truth orientation for each
# mb sample
mb_orientations_gt = tf.gather(orientations_gt,
mb_gt_indices)
elif self._box_rep in ['box_8c', 'box_8co']:
# Get boxes_3d ground truth mini-batch and convert to box_8c
mb_boxes_3d_gt = tf.gather(boxes_3d_gt, mb_gt_indices)
if self._box_rep == 'box_8c':
mb_boxes_8c_gt = \
box_8c_encoder.tf_box_3d_to_box_8c(mb_boxes_3d_gt)
elif self._box_rep == 'box_8co':
mb_boxes_8c_gt = \
box_8c_encoder.tf_box_3d_to_box_8co(mb_boxes_3d_gt)
# Convert proposals: anchors -> box_3d -> box8c
proposal_boxes_3d = \
box_3d_encoder.anchors_to_box_3d(all_anchors,
fix_lw=True)
proposal_boxes_8c = \
box_8c_encoder.tf_box_3d_to_box_8c(proposal_boxes_3d)
# Get mini batch offsets
mb_boxes_8c = tf.boolean_mask(proposal_boxes_8c, mb_mask)
mb_offsets_gt = box_8c_encoder.tf_box_8c_to_offsets(
mb_boxes_8c, mb_boxes_8c_gt)
# Flatten the offsets to a (N x 24) vector
mb_offsets_gt = tf.reshape(mb_offsets_gt, [-1, 24])
elif self._box_rep in ['box_4c', 'box_4ca']:
# Get ground plane for box_4c conversion
ground_plane = self.placeholders[
self.PL_GROUND_PLANE]
# Convert gt boxes_3d -> box_4c
mb_boxes_3d_gt = tf.gather(boxes_3d_gt, mb_gt_indices)
mb_boxes_4c_gt = box_4c_encoder.tf_box_3d_to_box_4c(
mb_boxes_3d_gt, ground_plane)
# Convert proposals: anchors -> box_3d -> box_4c
proposal_boxes_3d = \
box_3d_encoder.anchors_to_box_3d(all_anchors,
fix_lw=True)
proposal_boxes_4c = \
box_4c_encoder.tf_box_3d_to_box_4c(proposal_boxes_3d,
ground_plane)
# Get mini batch
mb_boxes_4c = tf.boolean_mask(proposal_boxes_4c, mb_mask)
mb_offsets_gt = box_4c_encoder.tf_box_4c_to_offsets(
mb_boxes_4c, mb_boxes_4c_gt)
if self._box_rep == 'box_4ca':
# Gather corresponding ground truth orientation for each
# mb sample
mb_orientations_gt = tf.gather(orientations_gt,
mb_gt_indices)
else:
raise NotImplementedError(
'Anchor encoding not implemented for', self._box_rep)
elif self._train_val_test in ['test']:
# In test-mode, skip mini-batch processing and just calculate
# box conversions.
if self._box_rep in ['box_4c', 'box_4ca']:
# Convert proposals: anchors -> box_3d -> box_4c
proposal_boxes_3d = \
box_3d_encoder.anchors_to_box_3d(all_anchors, fix_lw=True)
proposal_boxes_4c = \
box_4c_encoder.tf_box_3d_to_box_4c(proposal_boxes_3d,
ground_plane)
elif self._box_rep in ['box_8c', 'box_8co']:
# Convert proposals: anchors -> box_3d -> box8c
proposal_boxes_3d = \
box_3d_encoder.anchors_to_box_3d(all_anchors, fix_lw=True)
proposal_boxes_8c = \
box_8c_encoder.tf_box_3d_to_box_8c(proposal_boxes_3d)
######################################################
# Final Predictions
######################################################
# Get orientations from angle vectors
if all_angle_vectors is not None:
with tf.variable_scope('avod_orientation'):
all_orientations = \
orientation_encoder.tf_angle_vector_to_orientation(
all_angle_vectors)
# Apply offsets to regress proposals
with tf.variable_scope('avod_regression'):
if self._box_rep == 'box_3d':
prediction_anchors = \
anchor_encoder.offset_to_anchor(all_anchors,
all_offsets)
elif self._box_rep in ['box_8c', 'box_8co']:
# Reshape the 24-dim regressed offsets to (N x 3 x 8)
reshaped_offsets = tf.reshape(all_offsets,
[-1, 3, 8])
# Given the offsets, get the boxes_8c
prediction_boxes_8c = \
box_8c_encoder.tf_offsets_to_box_8c(proposal_boxes_8c,
reshaped_offsets)
# Convert corners back to box3D
prediction_boxes_3d = \
box_8c_encoder.box_8c_to_box_3d(prediction_boxes_8c)
# Convert the box_3d to anchor format for nms
prediction_anchors = \
box_3d_encoder.tf_box_3d_to_anchor(prediction_boxes_3d)
elif self._box_rep in ['box_4c', 'box_4ca']:
# Convert predictions box_4c -> box_3d
prediction_boxes_4c = \
box_4c_encoder.tf_offsets_to_box_4c(proposal_boxes_4c,
all_offsets)
prediction_boxes_3d = \
box_4c_encoder.tf_box_4c_to_box_3d(prediction_boxes_4c,
ground_plane)
# Convert to anchor format for nms
prediction_anchors = \
box_3d_encoder.tf_box_3d_to_anchor(prediction_boxes_3d)
else:
raise NotImplementedError('Regression not implemented for',
self._box_rep)
# Apply Non-oriented NMS in BEV
with tf.variable_scope('avod_nms'):
bev_extents = self.dataset.kitti_utils.bev_extents
with tf.variable_scope('bev_projection'):
# Project predictions into BEV
avod_bev_boxes, _ = anchor_projector.project_to_bev(
prediction_anchors, bev_extents)
avod_bev_boxes_tf_order = \
anchor_projector.reorder_projected_boxes(
avod_bev_boxes)
# Get top score from second column onward
all_top_scores = tf.reduce_max(all_cls_logits[:, 1:], axis=1)
# Apply NMS in BEV
nms_indices = tf.image.non_max_suppression(
avod_bev_boxes_tf_order,
all_top_scores,
max_output_size=self._nms_size,
iou_threshold=self._nms_iou_threshold)
# Gather predictions from NMS indices
top_classification_logits = tf.gather(all_cls_logits,
nms_indices)
top_classification_softmax = tf.gather(all_cls_softmax,
nms_indices)
top_prediction_anchors = tf.gather(prediction_anchors,
nms_indices)
if self._box_rep == 'box_3d':
top_orientations = tf.gather(
all_orientations, nms_indices)
elif self._box_rep in ['box_8c', 'box_8co']:
top_prediction_boxes_3d = tf.gather(
prediction_boxes_3d, nms_indices)
top_prediction_boxes_8c = tf.gather(
prediction_boxes_8c, nms_indices)
elif self._box_rep == 'box_4c':
top_prediction_boxes_3d = tf.gather(
prediction_boxes_3d, nms_indices)
top_prediction_boxes_4c = tf.gather(
prediction_boxes_4c, nms_indices)
elif self._box_rep == 'box_4ca':
top_prediction_boxes_3d = tf.gather(
prediction_boxes_3d, nms_indices)
top_prediction_boxes_4c = tf.gather(
prediction_boxes_4c, nms_indices)
top_orientations = tf.gather(
all_orientations, nms_indices)
else:
raise NotImplementedError('NMS gather not implemented for',
self._box_rep)
prediction_dict = dict()
if self._train_val_test in ['train', 'val']:
# Additional entries are added to the shared prediction_dict
# Mini batch predictions
prediction_dict[self.PRED_MB_CLASSIFICATION_LOGITS] = \
mb_classifications_logits
prediction_dict[self.PRED_MB_CLASSIFICATION_SOFTMAX] = \
mb_classifications_softmax
prediction_dict[self.PRED_MB_OFFSETS] = mb_offsets
# Mini batch ground truth
prediction_dict[self.PRED_MB_CLASSIFICATIONS_GT] = \
mb_classification_gt
prediction_dict[self.PRED_MB_OFFSETS_GT] = mb_offsets_gt
# Top NMS predictions
prediction_dict[self.PRED_TOP_CLASSIFICATION_LOGITS] = \
top_classification_logits
prediction_dict[self.PRED_TOP_CLASSIFICATION_SOFTMAX] = \
top_classification_softmax
prediction_dict[self.PRED_TOP_PREDICTION_ANCHORS] = \
top_prediction_anchors
else:
# self._train_val_test == 'test'
prediction_dict[self.PRED_TOP_CLASSIFICATION_SOFTMAX] = \
top_classification_softmax
prediction_dict[self.PRED_TOP_PREDICTION_ANCHORS] = \
top_prediction_anchors
if self._box_rep == 'box_3d':
if self._train_val_test in ['train', 'val']:
prediction_dict[self.PRED_MB_ANCHORS_GT] = mb_anchors_gt
prediction_dict[self.PRED_MB_ORIENTATIONS_GT] = \
mb_orientations_gt
prediction_dict[self.PRED_MB_ANGLE_VECTORS] = mb_angle_vectors
prediction_dict[self.PRED_TOP_ORIENTATIONS] = top_orientations
# For debugging
prediction_dict[self.PRED_ALL_ANGLE_VECTORS] = all_angle_vectors
elif self._box_rep in ['box_8c', 'box_8co']:
prediction_dict[self.PRED_TOP_PREDICTION_BOXES_3D] = \
top_prediction_boxes_3d
# Store the corners before converting for visualization purposes
prediction_dict[self.PRED_TOP_BOXES_8C] = top_prediction_boxes_8c
elif self._box_rep == 'box_4c':
prediction_dict[self.PRED_TOP_PREDICTION_BOXES_3D] = \
top_prediction_boxes_3d
prediction_dict[self.PRED_TOP_BOXES_4C] = top_prediction_boxes_4c
elif self._box_rep == 'box_4ca':
if self._train_val_test in ['train', 'val']:
prediction_dict[self.PRED_MB_ORIENTATIONS_GT] = \
mb_orientations_gt
prediction_dict[self.PRED_MB_ANGLE_VECTORS] = mb_angle_vectors
prediction_dict[self.PRED_TOP_PREDICTION_BOXES_3D] = \
top_prediction_boxes_3d
prediction_dict[self.PRED_TOP_BOXES_4C] = top_prediction_boxes_4c
prediction_dict[self.PRED_TOP_ORIENTATIONS] = top_orientations
else:
raise NotImplementedError('Prediction dict not implemented for',
self._box_rep)
return prediction_dict
def build(self):
# Setup input placeholders
# 信息输入
self._set_up_input_pls()
# Setup feature extractors
# 特征提取
self._set_up_feature_extractors()
# 1*1卷积后的bev_fasturemap和img_featuremap
bev_proposal_input = self.bev_bottleneck
img_proposal_input = self.img_bottleneck
# 融合参数
fusion_mean_div_factor = 2.0
# If both img and bev probabilites are set to 1.0, don't do path drop
# 如果image和bev概率都设置为1.0，则不要执行路径丢弃。
# train=0.9,test/val=1.0
if not (self._path_drop_probabilities[0] ==
self._path_drop_probabilities[1] == 1.0):
with tf.variable_scope('rpn_path_drop'):
# 从均匀分布中输出随机值。.随机输出3个0-1之间的数
random_values = tf.random_uniform(shape=[3],
minval=0.0,
maxval=1.0)
# 0.9,0.9.
# 不是零就是1
img_mask, bev_mask = self.create_path_drop_masks(
self._path_drop_probabilities[0],
self._path_drop_probabilities[1],
random_values)
# 选择是否输入.如果mask为1 ,则输入,否则不输入
img_proposal_input = tf.multiply(img_proposal_input,
img_mask)
bev_proposal_input = tf.multiply(bev_proposal_input,
bev_mask)
self.img_path_drop_mask = img_mask
self.bev_path_drop_mask = bev_mask
# Overwrite the division factor
# 在训练时的融合参数
fusion_mean_div_factor = img_mask + bev_mask
# bev和 iname 的 featuremap 的裁剪
with tf.variable_scope('proposal_roi_pooling'):
with tf.variable_scope('box_indices'):
def get_box_indices(boxes):
proposals_shape = boxes.get_shape().as_list()
if any(dim is None for dim in proposals_shape):
proposals_shape = tf.shape(boxes)
ones_mat = tf.ones(proposals_shape[:2], dtype=tf.int32)
multiplier = tf.expand_dims(
tf.range(start=0, limit=proposals_shape[0]), 1)
return tf.reshape(ones_mat * multiplier, [-1])
bev_boxes_norm_batches = tf.expand_dims(
self._bev_anchors_norm_pl, axis=0)
# These should be all 0's since there is only 1 image
# 这些应该全是0，因为只有1个图像
tf_box_indices = get_box_indices(bev_boxes_norm_batches)
# Do ROI Pooling on BEV
# 主要目的是让两种数据的输入能够统一一下，便于后续做数据融合．resize为６＊６的输出
bev_proposal_rois = tf.image.crop_and_resize(
bev_proposal_input,
self._bev_anchors_norm_pl,
tf_box_indices,
self._proposal_roi_crop_size)
# Do ROI Pooling on image
img_proposal_rois = tf.image.crop_and_resize(
img_proposal_input,
self._img_anchors_norm_pl,
tf_box_indices,
self._proposal_roi_crop_size)
# bev和image的融合
with tf.variable_scope('proposal_roi_fusion'):
rpn_fusion_out = None
# mean
if self._fusion_method == 'mean':
tf_features_sum = tf.add(bev_proposal_rois, img_proposal_rois)
# /2平均融合方式
rpn_fusion_out = tf.divide(tf_features_sum,
fusion_mean_div_factor)
elif self._fusion_method == 'concat':
rpn_fusion_out = tf.concat(
[bev_proposal_rois, img_proposal_rois], axis=3)
else:
raise ValueError('Invalid fusion method', self._fusion_method)
# TODO: move this section into an separate AnchorPredictor class
with tf.variable_scope('anchor_predictor', 'ap', [rpn_fusion_out]):
# 融合后的作为输入
tensor_in = rpn_fusion_out
# Parse rpn layers config
layers_config = self._config.layers_config.rpn_config
l2_weight_decay = layers_config.l2_weight_decay
if l2_weight_decay > 0:
# 正则化
weights_regularizer = slim.l2_regularizer(l2_weight_decay)
else:
weights_regularizer = None
with slim.arg_scope([slim.conv2d],
weights_regularizer=weights_regularizer):
# Use conv2d instead of fully_connected layers.
# 256,6上一层的输出实际上就是6*6的所以将全连接化为卷积操作，使用6*6的卷积核
cls_fc6 = slim.conv2d(tensor_in,
layers_config.cls_fc6,
self._proposal_roi_crop_size,
padding='VALID',
scope='cls_fc6')
cls_fc6_drop = slim.dropout(cls_fc6,
layers_config.keep_prob,
is_training=self._is_training,
scope='cls_fc6_drop')
cls_fc7 = slim.conv2d(cls_fc6_drop,
layers_config.cls_fc7,
[1, 1],
scope='cls_fc7')
cls_fc7_drop = slim.dropout(cls_fc7,
layers_config.keep_prob,
is_training=self._is_training,
scope='cls_fc7_drop')
# 2,分类
cls_fc8 = slim.conv2d(cls_fc7_drop,
2,
[1, 1],
activation_fn=None,
scope='cls_fc8')
# 删除指定尺寸为1 的
objectness = tf.squeeze(
cls_fc8, [1, 2],
name='cls_fc8/squeezed')
# Use conv2d instead of fully_connected layers.
reg_fc6 = slim.conv2d(tensor_in,
layers_config.reg_fc6,
self._proposal_roi_crop_size,
padding='VALID',
scope='reg_fc6')
reg_fc6_drop = slim.dropout(reg_fc6,
layers_config.keep_prob,
is_training=self._is_training,
scope='reg_fc6_drop')
reg_fc7 = slim.conv2d(reg_fc6_drop,
layers_config.reg_fc7,
[1, 1],
scope='reg_fc7')
reg_fc7_drop = slim.dropout(reg_fc7,
layers_config.keep_prob,
is_training=self._is_training,
scope='reg_fc7_drop')
# ∆t x , ∆t y , ∆t z , ∆d x , ∆d y , ∆d z
# 256,6个回归值包括中心点差值,以及长宽高的差值
reg_fc8 = slim.conv2d(reg_fc7_drop,
6,
[1, 1],
activation_fn=None,
scope='reg_fc8')
offsets = tf.squeeze(
reg_fc8, [1, 2],
name='reg_fc8/squeezed')
# Histogram summaries
# 并没有用.就是一个可视化、可以自己选择是否可视化
with tf.variable_scope('histograms_feature_extractor'):
with tf.variable_scope('bev_vgg'):
for end_point in self.bev_end_points:
tf.summary.histogram(
end_point, self.bev_end_points[end_point])
with tf.variable_scope('img_vgg'):
for end_point in self.img_end_points:
tf.summary.histogram(
end_point, self.img_end_points[end_point])
with tf.variable_scope('histograms_rpn'):
with tf.variable_scope('anchor_predictor'):
fc_layers = [cls_fc6, cls_fc7, cls_fc8, objectness,
reg_fc6, reg_fc7, reg_fc8, offsets]
for fc_layer in fc_layers:
# fix the name to avoid tf warnings
tf.summary.histogram(fc_layer.name.replace(':', '_'),
fc_layer)
# Return the proposals
with tf.variable_scope('proposals'):
anchors = self.placeholders[self.PL_ANCHORS]
# Decode anchor regression offsets
with tf.variable_scope('decoding'):
# 得到回归后的(x,y,z,dx,dy,dz).由最初的输入变为回归的值
regressed_anchors = anchor_encoder.offset_to_anchor(
anchors, offsets)
with tf.variable_scope('bev_projection'):
# [[-40,40],[0,70]]
# 返回bev_box_corner,bev_box_corners_norm
_, bev_proposal_boxes_norm = anchor_projector.project_to_bev(
regressed_anchors, self._bev_extents)
with tf.variable_scope('softmax'):
objectness_softmax = tf.nn.softmax(objectness)
with tf.variable_scope('nms'):
objectness_scores = objectness_softmax[:, 1]
# Do NMS on regressed anchors
# 实现极大值抑制non max suppression，
# 其中boxes是不同boxes的坐标，scores是不同boxes预测的分数，max_boxes是保留的最大box的个数。
# iou_threshold是一个阈值，去掉大于这个阈值的所有boxes?。
# _nms_size=1024,0.8
# 筛选出来的序数
top_indices = tf.image.non_max_suppression(
bev_proposal_boxes_norm, objectness_scores,
max_output_size=self._nms_size,
iou_threshold=self._nms_iou_thresh)
# 选择筛选后的anchors和objectness
top_anchors = tf.gather(regressed_anchors, top_indices)
top_objectness_softmax = tf.gather(objectness_scores,
top_indices)
# top_offsets = tf.gather(offsets, top_indices)
# top_objectness = tf.gather(objectness, top_indices)
# Get mini batch
all_ious_gt = self.placeholders[self.PL_ANCHOR_IOUS]
all_offsets_gt = self.placeholders[self.PL_ANCHOR_OFFSETS]
all_classes_gt = self.placeholders[self.PL_ANCHOR_CLASSES]
with tf.variable_scope('mini_batch'):
mini_batch_utils = self.dataset.kitti_utils.mini_batch_utils
mini_batch_mask, _ = \
mini_batch_utils.sample_rpn_mini_batch(all_ious_gt)
# ROI summary images
rpn_mini_batch_size = \
self.dataset.kitti_utils.mini_batch_utils.rpn_mini_batch_size
with tf.variable_scope('bev_rpn_rois'):
mb_bev_anchors_norm = tf.boolean_mask(self._bev_anchors_norm_pl,
mini_batch_mask)
mb_bev_box_indices = tf.zeros_like(
tf.boolean_mask(all_classes_gt, mini_batch_mask),
dtype=tf.int32)
# Show the ROIs of the BEV input density map
# for the mini batch anchors
bev_input_rois = tf.image.crop_and_resize(
self._bev_preprocessed,
mb_bev_anchors_norm,
mb_bev_box_indices,
(32, 32))
bev_input_roi_summary_images = tf.split(
bev_input_rois, self._bev_depth, axis=3)
tf.summary.image('bev_rpn_rois',
bev_input_roi_summary_images[-1],
max_outputs=rpn_mini_batch_size)
with tf.variable_scope('img_rpn_rois'):
# ROIs on image input
mb_img_anchors_norm = tf.boolean_mask(self._img_anchors_norm_pl,
mini_batch_mask)
mb_img_box_indices = tf.zeros_like(
tf.boolean_mask(all_classes_gt, mini_batch_mask),
dtype=tf.int32)
# Do test ROI pooling on mini batch
img_input_rois = tf.image.crop_and_resize(
self._img_preprocessed,
mb_img_anchors_norm,
mb_img_box_indices,
(32, 32))
tf.summary.image('img_rpn_rois',
img_input_rois,
max_outputs=rpn_mini_batch_size)
# Ground Truth Tensors
with tf.variable_scope('one_hot_classes'):
# Anchor classification ground truth
# Object / Not Object
min_pos_iou = \
self.dataset.kitti_utils.mini_batch_utils.rpn_pos_iou_range[0]
objectness_classes_gt = tf.cast(
tf.greater_equal(all_ious_gt, min_pos_iou),
dtype=tf.int32)
objectness_gt = tf.one_hot(
objectness_classes_gt, depth=2,
on_value=1.0 - self._config.label_smoothing_epsilon,
off_value=self._config.label_smoothing_epsilon)
# Mask predictions for mini batch
with tf.variable_scope('prediction_mini_batch'):
objectness_masked = tf.boolean_mask(objectness, mini_batch_mask)
offsets_masked = tf.boolean_mask(offsets, mini_batch_mask)
with tf.variable_scope('ground_truth_mini_batch'):
objectness_gt_masked = tf.boolean_mask(
objectness_gt, mini_batch_mask)
offsets_gt_masked = tf.boolean_mask(all_offsets_gt,
mini_batch_mask)
# Specify the tensors to evaluate
predictions = dict()
# Temporary predictions for debugging
# predictions['anchor_ious'] = anchor_ious
# predictions['anchor_offsets'] = all_offsets_gt
if self._train_val_test in ['train', 'val']:
# All anchors
predictions[self.PRED_ANCHORS] = anchors
# Mini-batch masks
predictions[self.PRED_MB_MASK] = mini_batch_mask
# Mini-batch predictions
predictions[self.PRED_MB_OBJECTNESS] = objectness_masked
predictions[self.PRED_MB_OFFSETS] = offsets_masked
# Mini batch ground truth
predictions[self.PRED_MB_OFFSETS_GT] = offsets_gt_masked
predictions[self.PRED_MB_OBJECTNESS_GT] = objectness_gt_masked
# Proposals after nms
predictions[self.PRED_TOP_INDICES] = top_indices
predictions[self.PRED_TOP_ANCHORS] = top_anchors
predictions[
self.PRED_TOP_OBJECTNESS_SOFTMAX] = top_objectness_softmax
else:
# self._train_val_test == 'test'
predictions[self.PRED_TOP_ANCHORS] = top_anchors
predictions[
self.PRED_TOP_OBJECTNESS_SOFTMAX] = top_objectness_softmax
return predictions
