def build_graph(self, *args):
costs = []
for i, name in enumerate(self.agent_names):
joint_state, action, reward, isOver, comb_mask, joint_fine_mask = args[i * 6:(i + 1) * 6]
with tf.variable_scope(name):
with conditional(name is None, varreplace.freeze_variables()):
state = tf.identity(joint_state[:, 0, :, :, :], name='state')
fine_mask = tf.identity(joint_fine_mask[:, 0, :], name='fine_mask')
self.predict_value = self.get_DQN_prediction(state, comb_mask, fine_mask)
if not get_current_tower_context().is_training:
continue
# reward = tf.clip_by_value(reward, -1, 1)
next_state = tf.identity(joint_state[:, 1, :, :, :], name='next_state')
next_fine_mask = tf.identity(joint_fine_mask[:, 1, :], name='next_fine_mask')
action_onehot = tf.one_hot(action, self.num_actions, 1.0, 0.0)
pred_action_value = tf.reduce_sum(self.predict_value * action_onehot, 1) # N,
max_pred_reward = tf.reduce_mean(tf.reduce_max(
self.predict_value, 1), name='predict_reward')
summary.add_moving_summary(max_pred_reward)
with tf.variable_scope('target'), varreplace.freeze_variables(skip_collection=True):
# we are alternating between comb and fine states
targetQ_predict_value = self.get_DQN_prediction(next_state, tf.logical_not(comb_mask), next_fine_mask) # NxA
if self.method != 'Double':
# DQN
best_v = tf.reduce_max(targetQ_predict_value, 1) # N,
else:
# Double-DQN
next_predict_value = self.get_DQN_prediction(next_state, tf.logical_not(comb_mask), next_fine_mask)
self.greedy_choice = tf.argmax(next_predict_value, 1) # N,
predict_onehot = tf.one_hot(self.greedy_choice, self.num_actions, 1.0, 0.0)
best_v = tf.reduce_sum(targetQ_predict_value * predict_onehot, 1)
target = reward + (1.0 - tf.cast(isOver, tf.float32)) * self.gamma * tf.stop_gradient(best_v)
# target = tf.Print(target, [target], summarize=100)
# tf.assert_greater(target, -100., message='target error')
# tf.assert_greater(pred_action_value, -100., message='pred value error')
# pred_action_value = tf.Print(pred_action_value, [pred_action_value], summarize=100)
l2_loss = tensorpack.regularize_cost(name + '/dqn.*W{1}', l2_regularizer(1e-3))
# cost = tf.losses.mean_squared_error(target, pred_action_value)
with tf.control_dependencies([tf.assert_greater(target, -100., message='target error'), tf.assert_greater(pred_action_value, -100., message='pred value error')]):
cost = tf.losses.huber_loss(
target, pred_action_value, reduction=tf.losses.Reduction.MEAN)
summary.add_param_summary((name + '.*/W', ['histogram', 'rms'])) # monitor all W
summary.add_moving_summary(cost)
costs.append(cost)
if not get_current_tower_context().is_training:
return
return tf.add_n([costs[i] * self.cost_weights[i] for i in range(3)])
def build_graph(self, image, label):
ctx = get_current_tower_context()
# all-zero tensor hurt performance for some reason.
label = tf.random_uniform([self.batch],
minval=0,
maxval=1000 - 1,
dtype=tf.int32,
name='synthetic_labels')
# our fake images are in [0, 1]
image = tf.cast(image, tf.float32) * 2.0 - 1.
if self.data_format == 'NCHW':
image = tf.transpose(image, [0, 3, 1, 2])
logits = self._get_logits(image)
if logits.dtype != tf.float32:
logger.info("Casting back to fp32 ...")
logits = tf.cast(logits, tf.float32)
loss = tf.nn.sparse_softmax_cross_entropy_with_logits(logits=logits,
labels=label)
loss = tf.reduce_mean(loss, name='xentropy-loss')
# TODO tensorflow/benchmark only computes WD on 1 GPU.
if False:
self.cost = loss # disable wd
else:
wd_cost = regularize_cost('.*', tf.nn.l2_loss) * 1e-4
self.cost = tf.add_n([loss, wd_cost], name='cost')
self.loss = self.cost # NEEDED FOR RAY DEMO
def _build_graph(self, inputs):
self.x_mfcc, self.y_spec, self.y_mel = inputs
is_training = get_current_tower_context().is_training
# build net1
# train1에서 학습된 SI-ASR 모델에서 PPGs 추출.
# 목표 음성에서 추출된 MFCC를 입력해 해당 MFCC에 대한 PPG들을 뽑아낸다.
self.net1 = Net1()
with tf.variable_scope('net1'):
self.ppgs, _, _ = self.net1.network(self.x_mfcc, is_training)
self.ppgs = tf.identity(self.ppgs, name='ppgs')
# build net2
# net1을 통과시켜 얻은 PPGs를 이용해 스펙트로그램과 mel-스펙트로그램을 예측한다.
with tf.variable_scope('net2'):
self.pred_spec, self.pred_mel = self.network(
self.ppgs, is_training)
self.pred_spec = tf.identity(self.pred_spec, name='pred_spec')
self.cost = self.loss()
# summaries
tf.summary.scalar('net2/train/loss', self.cost)
if not is_training:
tf.summary.scalar('net2/eval/summ_loss', self.cost)
def build_graph(self, image, label):
# all-zero tensor hurt performance for some reason.
ctx = get_current_tower_context()
label = tf.random_uniform(
[args.batch],
minval=0, maxval=1000 - 1,
dtype=tf.int32, name='synthetic_labels')
# our fake images are in [0, 1]
target_dtype = tf.float16 if args.use_fp16 else tf.float32
if image.dtype != target_dtype:
image = tf.cast(image, target_dtype) * 2.0 - 1.
if self.data_format == 'NCHW':
image = tf.transpose(image, [0, 3, 1, 2])
logits = self._get_logits(image)
if logits.dtype != tf.float32:
logger.info("Casting logits back to fp32 ...")
logits = tf.cast(logits, tf.float32)
loss = tf.nn.sparse_softmax_cross_entropy_with_logits(logits=logits, labels=label)
loss = tf.reduce_mean(loss, name='xentropy-loss')
if ctx.index == ctx.total - 1:
wd_cost = regularize_cost('.*', tf.nn.l2_loss) * (1e-4 * ctx.total)
return tf.add_n([loss, wd_cost], name='cost')
else:
return loss
def build_graph(self, state, val_target):
values = tf.squeeze(self.get_pred(state), axis=1, name='value')
# fake_values = tf.zeros_like(values)
is_training = get_current_tower_context().is_training
if not is_training:
return
with tf.variable_scope("value_loss"):
value_loss = tf.reduce_mean(tf.squared_difference(
val_target, values),
name='value_loss')
# l2_loss = tf.get_collection(tf.GraphKeys.REGULARIZATION_LOSSES, scope=SCOPE)
# NOTE: this collection doesn't always grow with towers.
# It only grows with actual variable creation, but not get_variable call.
# ctx = get_current_tower_context()
# if ctx.has_own_variables: # be careful of the first tower (name='')
# l2_loss = ctx.get_collection_in_tower(tf.GraphKeys.REGULARIZATION_LOSSES)
# else:
# l2_loss = tf.get_collection(tf.GraphKeys.REGULARIZATION_LOSSES)
# if len(l2_loss) > 0:
# logger.info("regularize_cost_from_collection() found {} regularizers "
# "in REGULARIZATION_LOSSES collection.".format(len(l2_loss)))
loss = value_loss
loss = tf.identity(loss, name='loss')
add_moving_summary(loss, decay=0)
add_moving_summary(value_loss, decay=0)
return loss
def build_graph(self, inputs, y_spec, y_mel):
self.x_mfcc, self.y_spec, self.y_mel = inputs, y_spec, y_mel
is_training = get_current_tower_context().is_training
# build net1
self.net1 = Net1()
with tf.variable_scope('net1'):
self.ppgs, _, _ = self.net1.network(self.x_mfcc, is_training)
self.ppgs = tf.identity(self.ppgs, name='ppgs')
# build net2
with tf.variable_scope('net2'):
self.pred_spec, self.pred_mel = self.network(
self.ppgs, is_training)
self.pred_spec = tf.identity(self.pred_spec, name='pred_spec')
self.cost = self.loss()
# summaries
tf.summary.scalar('net2/train/loss', self.cost)
if not is_training:
tf.summary.scalar('net2/eval/summ_loss', self.cost)
return self.cost
def _build_graph(self, inputs):
self.x_mfcc, self.y_spec, self.y_mel = inputs
is_training = get_current_tower_context().is_training
# build net1
self.net1 = Net1()
with tf.variable_scope('net1'):
self.ppgs, _, _ = self.net1.network(self.x_mfcc, is_training)
self.ppgs = tf.identity(self.ppgs, name='ppgs')
# build net2
with tf.variable_scope('net2'):
self.mu, self.log_var, self.log_pi = self.network(
self.ppgs, is_training)
self.cost = self.loss()
# summaries
tf.summary.scalar('net2/train/loss', self.cost)
tf.summary.histogram('net2/train/mu', self.mu)
tf.summary.histogram('net2/train/var', tf.exp(self.log_var))
tf.summary.histogram('net2/train/pi', tf.exp(self.log_pi))
if not is_training:
tf.summary.scalar('net2/eval/summ_loss', self.cost)
# build for conversion phase
self.convert()
def _build_graph(self, inputs):
self.x_mfccs, self.y_ppgs = inputs
is_training = get_current_tower_context().is_training
with tf.variable_scope('net1'):
self.ppgs, self.preds, self.logits = self.network(
self.x_mfccs, is_training)
self.cost = self.loss()
acc = self.acc()
# summaries
tf.summary.scalar('net1/train/loss', self.cost)
tf.summary.scalar('net1/train/acc', acc)
if not is_training:
# summaries
tf.summary.scalar('net1/eval/summ_loss', self.cost)
tf.summary.scalar('net1/eval/summ_acc', acc)
# for confusion matrix
tf.reshape(self.y_ppgs,
shape=(tf.size(self.y_ppgs), ),
name='net1/eval/y_ppg_1d')
tf.reshape(self.preds,
shape=(tf.size(self.preds), ),
name='net1/eval/pred_ppg_1d')
def _build_graph(self, inputs):
#self.x_mfcc, self.y_spec, self.y_mel = inputs
self.y_mel, self.ppgs = inputs
is_training = get_current_tower_context().is_training
# build net1
'''
self.net1 = Net1()
with tf.variable_scope('net1'):
self.ppgs, _, _ = self.net1.network(self.x_mfcc, is_training)
self.ppgs = tf.identity(self.ppgs, name='ppgs')
'''
# build net2
with tf.variable_scope('net2'):
#self.pred_spec, self.pred_mel = self.network(self.ppgs, is_training)
print("begin prediction")
self.pred_mel = self.network(self.ppgs, is_training)
#self.pred_spec = tf.identity(self.pred_spec, name='pred_spec')
self.pred_mel = tf.identity(self.pred_mel, name = 'pred_mel')
self.cost = self.loss()
# summaries
tf.summary.scalar('net2/train/loss', self.cost)
if not is_training:
tf.summary.scalar('net2/eval/summ_loss', self.cost)
def _build_graph(self, inputs):
comb_state, action, reward, isOver = inputs
comb_state = tf.cast(comb_state, tf.float32)
state = tf.slice(comb_state, [0, 0, 0, 0, 0], [-1, -1, -1, -1, self.channel], name='state')
self.predict_value = self.get_DQN_prediction(state)
if not get_current_tower_context().is_training:
return
reward = tf.clip_by_value(reward, -1, 1)
next_state = tf.slice(comb_state, [0, 0, 0, 0, 1], [-1, -1, -1, -1, self.channel], name='next_state')
action_onehot = tf.one_hot(action, self.num_actions, 1.0, 0.0)
pred_action_value = tf.reduce_sum(self.predict_value * action_onehot, 1) # N,
max_pred_reward = tf.reduce_mean(tf.reduce_max(
self.predict_value, 1), name='predict_reward')
summary.add_moving_summary(max_pred_reward)
with tf.variable_scope('target'):
targetQ_predict_value = self.get_DQN_prediction(next_state) # NxA
# if self.method != 'Double':
# # DQN
# best_v = tf.reduce_max(targetQ_predict_value, 1) # N,
# else:
# # Double-DQN
# next_predict_value = self.get_DQN_prediction(next_state)
# self.greedy_choice = tf.argmax(next_predict_value, 1) # N,
# predict_onehot = tf.one_hot(self.greedy_choice, self.num_actions, 1.0, 0.0)
# best_v = tf.reduce_sum(targetQ_predict_value * predict_onehot, 1)
# target = reward + (1.0 - tf.cast(isOver, tf.float32)) * self.gamma * tf.stop_gradient(best_v)
# if (self.method == 'DQN') or (self.method == 'Dueling'):
if 'Double' not in self.method :
# DQN
best_v = tf.reduce_max(targetQ_predict_value, 1) # N,
# if self.method == 'Double' or ('DuelingDouble'):
else:
# Double-DQN
next_predict_value = self.get_DQN_prediction(next_state)
self.greedy_choice = tf.argmax(next_predict_value, 1) # N,
predict_onehot = tf.one_hot(self.greedy_choice, self.num_actions, 1.0, 0.0)
best_v = tf.reduce_sum(targetQ_predict_value * predict_onehot, 1)
target = reward + (1.0 - tf.cast(isOver, tf.float32)) * self.gamma * tf.stop_gradient(best_v)
# self.cost = tf.clip_by_value(tf.losses.huber_loss(
# target,
# pred_action_value,
# reduction=tf.losses.Reduction.MEAN)
# , -1, 1, name='cost')
self.cost = tf.losses.huber_loss(target, pred_action_value,
reduction=tf.losses.Reduction.MEAN)
summary.add_param_summary(('conv.*/W', ['histogram', 'rms']),
('fc.*/W', ['histogram', 'rms'])) # monitor all W
summary.add_moving_summary(self.cost)
def build_graph(self, im, gt, training=None):
model_class = choose_model(self.cfg.network["name"])
if training == None:
training = get_current_tower_context().is_training
self.ops = model_class(im, self.cfg, training)
self.loss = build_loss(self.ops, im, gt, self.cfg)
tf.summary.scalar("Loss", self.loss)
return self.loss
def build_graph(self, image, label):
"""This function should build the model which takes the input variables
and return cost at the end"""
# In tensorflow, inputs to convolution function are assumed to be
# NHWC. Add a single channel here.
image = tf.expand_dims(image, 3)
image = image * 2 - 1 # center the pixels values at zero
# The context manager `argscope` sets the default option for all the layers under
# this context. Here we use 32 channel convolution with shape 3x3
with argscope([tf.layers.conv2d],
padding='same',
activation=tf.nn.relu):
l = tf.layers.conv2d(image, 32, 3, name='conv0')
l = tf.layers.max_pooling2d(l, 2, 2, padding='valid')
l = tf.layers.conv2d(l, 32, 3, name='conv1')
l = tf.layers.conv2d(l, 32, 3, name='conv2')
l = tf.layers.max_pooling2d(l, 2, 2, padding='valid')
l = tf.layers.conv2d(l, 32, 3, name='conv3')
l = tf.layers.flatten(l)
l = tf.layers.dense(l, 512, activation=tf.nn.relu, name='fc0')
l = tf.layers.dropout(
l, rate=0.5, training=get_current_tower_context().is_training)
logits = tf.layers.dense(l, 10, activation=tf.identity, name='fc1')
# a vector of length B with loss of each sample
cost = tf.nn.sparse_softmax_cross_entropy_with_logits(logits=logits,
labels=label)
cost = tf.reduce_mean(
cost, name='cross_entropy_loss') # the average cross-entropy loss
correct = tf.cast(tf.nn.in_top_k(logits, label, 1),
tf.float32,
name='correct')
accuracy = tf.reduce_mean(correct, name='accuracy')
# This will monitor training error & accuracy (in a moving average fashion). The value will be automatically
# 1. written to tensosrboard
# 2. written to stat.json
# 3. printed after each epoch
train_error = tf.reduce_mean(1 - correct, name='train_error')
summary.add_moving_summary(train_error, accuracy)
# Use a regex to find parameters to apply weight decay.
# Here we apply a weight decay on all W (weight matrix) of all fc layers
# If you don't like regex, you can certainly define the cost in any other methods.
wd_cost = tf.multiply(1e-5,
regularize_cost('fc.*/kernel', tf.nn.l2_loss),
name='regularize_loss')
total_cost = tf.add_n([wd_cost, cost], name='total_cost')
summary.add_moving_summary(cost, wd_cost, total_cost)
# monitor histogram of all weight (of conv and fc layers) in tensorboard
summary.add_param_summary(('.*/kernel', ['histogram', 'rms']))
# the function should return the total cost to be optimized
return total_cost
def network(self, ppgs, is_training):
# Pre-net
prenet_out = prenet(
ppgs,
num_units=[hp.train2.hidden_units, hp.train2.hidden_units // 2],
dropout_rate=hp.train2.dropout_rate,
is_training=is_training) # (N, T, E/2)
# CBHG1: mel-scale
# pred_mel = cbhg(prenet_out, hp.train2.num_banks, hp.train2.hidden_units // 2,
# hp.train2.num_highway_blocks, hp.train2.norm_type, is_training,
# scope="cbhg_mel")
# pred_mel = tf.layers.dense(pred_mel, self.y_mel.shape[-1]) # (N, T, n_mels)
pred_mel = prenet_out
# CBHG2: linear-scale
out = tf.layers.dense(pred_mel,
hp.train2.hidden_units // 2) # (N, T, n_mels)
out = cbhg(out,
hp.train2.num_banks,
hp.train2.hidden_units // 2,
hp.train2.num_highway_blocks,
hp.train2.norm_type,
is_training,
scope="cbhg_linear")
_, n_timesteps, n_bins = self.y_spec.get_shape().as_list()
n_units = n_bins * hp.train2.n_mixtures
out = tf.layers.dense(out,
n_units * 3,
bias_initializer=tf.random_uniform_initializer(
minval=-3., maxval=3.))
mu = tf.nn.sigmoid(out[..., :n_units])
mu = tf.reshape(
mu,
shape=(-1, n_timesteps, n_bins,
hp.train2.n_mixtures)) # (N, T, 1+hp.n_fft//2, n_mixtures)
log_var = tf.maximum(out[..., n_units:2 * n_units], -7.0)
log_var = tf.reshape(
log_var,
shape=(-1, n_timesteps, n_bins,
hp.train2.n_mixtures)) # (N, T, 1+hp.n_fft//2, n_mixtures)
log_pi = tf.reshape(
out[..., 2 * n_units:3 * n_units],
shape=(-1, n_timesteps, n_bins,
hp.train2.n_mixtures)) # (N, T, 1+hp.n_fft//2, n_mixtures)
log_pi = normalize(log_pi,
type='ins',
is_training=get_current_tower_context().is_training,
scope='normalize_pi')
log_pi = tf.nn.log_softmax(log_pi)
return mu, log_var, log_pi
def __init__(self,
proposals,
roi_func,
fastrcnn_head_func,
gt_targets,
image_shape2d,
num_classes,
roi_func_extra=None):
#参数：
# roi_func： 方框->festure的函数 我猜roi是指感兴趣区域：region of interest
# fastrcnn_head_fun： fastrcnn head函数，传入处理后的features
# gt_targets = 方框 + label
"""
Args:
proposals: BoxProposals
roi_func (boxes -> features): a function to crop features with rois
fastrcnn_head_func (features -> features): the fastrcnn head to apply on the cropped features
gt_targets (gt_boxes, gt_labels):
"""
# 设置 Cascade 属性
for k, v in locals().items():
if k != 'self':
setattr(self, k, v)
self.gt_boxes, self.gt_labels = gt_targets
del self.gt_targets
# 三个 cascade
self.num_cascade_stages = len(cfg.CASCADE.IOUS)
self.is_training = get_current_tower_context().is_training
if self.is_training:
@tf.custom_gradient
def scale_gradient(x):
return x, lambda dy: dy * (1.0 / self.num_cascade_stages)
self.scale_gradient = scale_gradient
else:
self.scale_gradient = tf.identity
ious = cfg.CASCADE.IOUS
# It's unclear how to do >3 stages, so it does not make sense to implement them
assert self.num_cascade_stages == 3, "Only 3-stage cascade was implemented!"
with tf.variable_scope('cascade_rcnn_stage1'):
H1, B1 = self.run_head(self.proposals, 0)
with tf.variable_scope('cascade_rcnn_stage2'):
B1_proposal = self.match_box_with_gt(B1, ious[1])
H2, B2 = self.run_head(B1_proposal, 1)
with tf.variable_scope('cascade_rcnn_stage3'):
B2_proposal = self.match_box_with_gt(B2, ious[2])
H3, B3 = self.run_head(B2_proposal, 2)
self._cascade_boxes = [B1, B2, B3]
self._heads = [H1, H2, H3]
def FullyConnectedWithTrackedMults(x,
out_dim,
network_complexity=None,
W_init=None,
b_init=None,
nl=tf.identity,
use_bias=True):
"""
Fully-Connected layer, takes a N>1D tensor and returns a 2D tensor.
It is an equivalent of `tf.layers.dense` except for naming conventions.
Args:
x (tf.Tensor): a tensor to be flattened except for the first dimension.
out_dim (int): output dimension
W_init: initializer for W. Defaults to `variance_scaling_initializer`.
b_init: initializer for b. Defaults to zero.
nl: a nonlinearity function
use_bias (bool): whether to use bias.
Returns:
tf.Tensor: a NC tensor named ``output`` with attribute `variables`.
Variable Names:
* ``W``: weights of shape [in_dim, out_dim]
* ``b``: bias
"""
x = symbf.batch_flatten(x)
if W_init is None:
W_init = tf.contrib.layers.variance_scaling_initializer()
if b_init is None:
b_init = tf.constant_initializer()
if get_current_tower_context().is_main_training_tower:
network_complexity['weights'] += out_dim * x.get_shape().as_list()[1]
network_complexity['mults'] += out_dim * x.get_shape().as_list()[1]
if use_bias:
network_complexity['weights'] += out_dim
W = tf.get_variable('W', (x.get_shape().as_list()[1], out_dim),
initializer=W_init)
if use_bias:
b = tf.get_variable('b', out_dim, initializer=W_init)
product = tf.matmul(x, W)
ret = nl(tf.nn.bias_add(product, b) if use_bias else product,
name='output')
ret.variables = VariableHolder(W=W)
if use_bias:
ret.variables.b = b
return ret
def generate_rpn_proposals(boxes, scores, img_shape):
"""
Args:
boxes: nx4 float dtype, decoded to floatbox already
scores: n float, the logits
img_shape: [h, w]
Returns:
boxes: kx4 float
scores: k logits
"""
if get_current_tower_context().is_training:
PRE_NMS_TOPK = config.TRAIN_PRE_NMS_TOPK
POST_NMS_TOPK = config.TRAIN_POST_NMS_TOPK
else:
PRE_NMS_TOPK = config.TEST_PRE_NMS_TOPK
POST_NMS_TOPK = config.TEST_POST_NMS_TOPK
@under_name_scope()
def clip_boxes(boxes, window):
boxes = tf.maximum(boxes, 0.0)
m = tf.tile(tf.reverse(window, [0]), [2]) # (4,)
boxes = tf.minimum(boxes, tf.to_float(m))
return boxes
topk = tf.minimum(PRE_NMS_TOPK, tf.size(scores))
topk_scores, topk_indices = tf.nn.top_k(scores, k=topk, sorted=False)
topk_boxes = tf.gather(boxes, topk_indices)
topk_boxes = clip_boxes(topk_boxes, img_shape)
topk_boxes_x1y1x2y2 = tf.reshape(topk_boxes, (-1, 2, 2))
topk_boxes_x1y1, topk_boxes_x2y2 = tf.split(topk_boxes_x1y1x2y2, 2, axis=1)
# nx1x2 each
wbhb = tf.squeeze(topk_boxes_x2y2 - topk_boxes_x1y1, axis=1)
valid = tf.reduce_all(wbhb > config.RPN_MIN_SIZE, axis=1) # n,
topk_valid_boxes_x1y1x2y2 = tf.boolean_mask(topk_boxes_x1y1x2y2, valid)
topk_valid_scores = tf.boolean_mask(topk_scores, valid)
topk_valid_boxes_y1x1y2x2 = tf.reshape(
tf.reverse(topk_valid_boxes_x1y1x2y2, axis=[2]),
(-1, 4), name='nms_input_boxes')
nms_indices = tf.image.non_max_suppression(
topk_valid_boxes_y1x1y2x2,
topk_valid_scores,
max_output_size=POST_NMS_TOPK,
iou_threshold=config.RPN_PROPOSAL_NMS_THRESH)
topk_valid_boxes = tf.reshape(topk_valid_boxes_x1y1x2y2, (-1, 4))
final_boxes = tf.gather(
topk_valid_boxes,
nms_indices, name='boxes')
final_scores = tf.gather(topk_valid_scores, nms_indices, name='scores')
final_probs = tf.gather(topk_valid_scores, nms_indices, name='probs')
return final_boxes, final_scores
def build_graph(self, image, label):
# In tensorflow, inputs to convolution function are assumed to be
# NHWC. Add a single channel here.
image = tf.expand_dims(image, 3)
image = image * 2 - 1 # center the pixels values at zero
with argscope([tf.layers.conv2d],
padding='same',
activation=tf.nn.relu):
l = tf.layers.conv2d(image, 32, 3, name='conv0')
l = tf.layers.max_pooling2d(l, 2, 2, padding='valid')
l = tf.layers.conv2d(l, 32, 3, name='conv1')
l = tf.layers.conv2d(l, 32, 3, name='conv2')
l = tf.layers.max_pooling2d(l, 2, 2, padding='valid')
l = tf.layers.conv2d(l, 32, 3, name='conv3')
l = tf.layers.flatten(l)
l = tf.layers.dense(l, 512, activation=tf.nn.relu, name='fc0')
l = tf.layers.dropout(
l, rate=0.5, training=get_current_tower_context().is_training)
logits = tf.layers.dense(l, 10, activation=tf.identity, name='fc1')
tf.nn.softmax(logits, name='prob') # a Bx10 with probabilities
# a vector of length B with loss of each sample
cost = tf.nn.sparse_softmax_cross_entropy_with_logits(logits=logits,
labels=label)
cost = tf.reduce_mean(
cost, name='cross_entropy_loss') # the average cross-entropy loss
correct = tf.cast(tf.nn.in_top_k(logits, label, 1),
tf.float32,
name='correct')
accuracy = tf.reduce_mean(correct, name='accuracy')
# This will monitor training error (in a moving_average fashion):
# 1. write the value to tensorboard
# 2. write the value to stat.json
# 3. print the value after each epoch
train_error = tf.reduce_mean(1 - correct, name='train_error')
summary.add_moving_summary(train_error, accuracy)
# Use a regex to find parameters to apply weight decay.
# Here we apply a weight decay on all W (weight matrix) of all fc layers
wd_cost = tf.multiply(1e-5,
regularize_cost('fc.*/kernel', tf.nn.l2_loss),
name='regularize_loss')
total_cost = tf.add_n([wd_cost, cost], name='total_cost')
summary.add_moving_summary(cost, wd_cost, total_cost)
# monitor histogram of all weight (of conv and fc layers) in tensorboard
summary.add_param_summary(('.*/kernel', ['histogram', 'rms']))
return total_cost
def build_graph(self, image, label):
"""This function should build the model which takes the input variables
and return cost at the end"""
# In tensorflow, inputs to convolution function are assumed to be
# NHWC. Add a single channel here.
image = tf.expand_dims(image, 3)
image = image * 2 - 1 # center the pixels values at zero
# The context manager `argscope` sets the default option for all the layers under
# this context. Here we use 32 channel convolution with shape 3x3
with argscope([tf.layers.conv2d], padding='same', activation=tf.nn.relu):
l = tf.layers.conv2d(image, 32, 3, name='conv0')
l = tf.layers.max_pooling2d(l, 2, 2, padding='valid')
l = tf.layers.conv2d(l, 32, 3, name='conv1')
l = tf.layers.conv2d(l, 32, 3, name='conv2')
l = tf.layers.max_pooling2d(l, 2, 2, padding='valid')
l = tf.layers.conv2d(l, 32, 3, name='conv3')
l = tf.layers.flatten(l)
l = tf.layers.dense(l, 512, activation=tf.nn.relu, name='fc0')
l = tf.layers.dropout(l, rate=0.5,
training=get_current_tower_context().is_training)
logits = tf.layers.dense(l, 10, activation=tf.identity, name='fc1')
# a vector of length B with loss of each sample
cost = tf.nn.sparse_softmax_cross_entropy_with_logits(logits=logits, labels=label)
cost = tf.reduce_mean(cost, name='cross_entropy_loss') # the average cross-entropy loss
correct = tf.cast(tf.nn.in_top_k(logits, label, 1), tf.float32, name='correct')
accuracy = tf.reduce_mean(correct, name='accuracy')
# This will monitor training error & accuracy (in a moving average fashion). The value will be automatically
# 1. written to tensosrboard
# 2. written to stat.json
# 3. printed after each epoch
train_error = tf.reduce_mean(1 - correct, name='train_error')
summary.add_moving_summary(train_error, accuracy)
# Use a regex to find parameters to apply weight decay.
# Here we apply a weight decay on all W (weight matrix) of all fc layers
# If you don't like regex, you can certainly define the cost in any other methods.
wd_cost = tf.multiply(1e-5,
regularize_cost('fc.*/kernel', tf.nn.l2_loss),
name='regularize_loss')
total_cost = tf.add_n([wd_cost, cost], name='total_cost')
summary.add_moving_summary(cost, wd_cost, total_cost)
# monitor histogram of all weight (of conv and fc layers) in tensorboard
summary.add_param_summary(('.*/kernel', ['histogram', 'rms']))
# the function should return the total cost to be optimized
return total_cost
def _build_graph(self, inputs):
"""This function should build the model which takes the input variables
and define self.cost at the end"""
# inputs contains a list of input variables defined above
image, label = inputs
# In tensorflow, inputs to convolution function are assumed to be
# NHWC. Add a single channel here.
image = tf.expand_dims(image, 3)
image = image * 2 - 1 # center the pixels values at zero
l = tf.layers.conv2d(image, 32, 3, padding='same', activation=tf.nn.relu, name='conv0')
l = tf.layers.max_pooling2d(l, 2, 2, padding='valid')
l = tf.layers.conv2d(l, 32, 3, padding='same', activation=tf.nn.relu, name='conv1')
l = tf.layers.conv2d(l, 32, 3, padding='same', activation=tf.nn.relu, name='conv2')
l = tf.layers.max_pooling2d(l, 2, 2, padding='valid')
l = tf.layers.conv2d(l, 32, 3, padding='same', activation=tf.nn.relu, name='conv3')
l = tf.layers.flatten(l)
l = tf.layers.dense(l, 512, activation=tf.nn.relu, name='fc0')
l = tf.layers.dropout(l, rate=0.5,
training=get_current_tower_context().is_training)
logits = tf.layers.dense(l, 10, activation=tf.identity, name='fc1')
tf.nn.softmax(logits, name='prob') # a Bx10 with probabilities
# a vector of length B with loss of each sample
cost = tf.nn.sparse_softmax_cross_entropy_with_logits(logits=logits, labels=label)
cost = tf.reduce_mean(cost, name='cross_entropy_loss') # the average cross-entropy loss
correct = tf.cast(tf.nn.in_top_k(logits, label, 1), tf.float32, name='correct')
accuracy = tf.reduce_mean(correct, name='accuracy')
# This will monitor training error (in a moving_average fashion):
# 1. write the value to tensosrboard
# 2. write the value to stat.json
# 3. print the value after each epoch
train_error = tf.reduce_mean(1 - correct, name='train_error')
summary.add_moving_summary(train_error, accuracy)
# Use a regex to find parameters to apply weight decay.
# Here we apply a weight decay on all W (weight matrix) of all fc layers
wd_cost = tf.multiply(1e-5,
regularize_cost('fc.*/kernel', tf.nn.l2_loss),
name='regularize_loss')
self.cost = tf.add_n([wd_cost, cost], name='total_cost')
summary.add_moving_summary(cost, wd_cost, self.cost)
# monitor histogram of all weight (of conv and fc layers) in tensorboard
summary.add_param_summary(('.*/kernel', ['histogram', 'rms']))
def build_graph(self, comb_state, action, reward, isOver):
comb_state = tf.cast(comb_state, tf.float32)
input_rank = comb_state.shape.rank
state = tf.slice(comb_state, [0] * input_rank,
[-1] * (input_rank - 1) + [self.history],
name='state')
self.predict_value = self.get_DQN_prediction(state)
if not get_current_tower_context().is_training:
return
reward = tf.clip_by_value(reward, -1, 1)
next_state = tf.slice(comb_state, [0] * (input_rank - 1) + [1],
[-1] * (input_rank - 1) + [self.history],
name='next_state')
next_state = tf.reshape(next_state, self._stacked_state_shape)
action_onehot = tf.one_hot(action, self.num_actions, 1.0, 0.0)
pred_action_value = tf.reduce_sum(self.predict_value * action_onehot,
1) # N,
max_pred_reward = tf.reduce_mean(tf.reduce_max(self.predict_value, 1),
name='predict_reward')
summary.add_moving_summary(max_pred_reward)
with tf.variable_scope('target'), varreplace.freeze_variables(
skip_collection=True):
targetQ_predict_value = self.get_DQN_prediction(next_state) # NxA
if self.method != 'Double':
# DQN
best_v = tf.reduce_max(targetQ_predict_value, 1) # N,
else:
# Double-DQN
next_predict_value = self.get_DQN_prediction(next_state)
self.greedy_choice = tf.argmax(next_predict_value, 1) # N,
predict_onehot = tf.one_hot(self.greedy_choice, self.num_actions,
1.0, 0.0)
best_v = tf.reduce_sum(targetQ_predict_value * predict_onehot, 1)
target = reward + (1.0 - tf.cast(
isOver, tf.float32)) * self.gamma * tf.stop_gradient(best_v)
cost = tf.losses.huber_loss(target,
pred_action_value,
reduction=tf.losses.Reduction.MEAN)
summary.add_param_summary(
('conv.*/W', ['histogram', 'rms']),
('fc.*/W', ['histogram', 'rms'])) # monitor all W
summary.add_moving_summary(cost)
return cost
def create_level(level, input_channels, output_channels, inputs, bn):
with tf.variable_scope('level_%d' % level, reuse=tf.AUTO_REUSE):
features = mlp_conv(inputs, [
input_channels,
int(input_channels / 2),
int(input_channels / 4),
int(input_channels / 8),
output_channels * int(tarch[level])
],
get_current_tower_context().is_training,
bn)
features = tf.reshape(
features, [tf.shape(features)[0], -1, output_channels])
return features
def build_graph(self, joint_state, next_mask, action, reward, isOver):
state = tf.identity(joint_state[:, 0, ...], name='state')
self.predict_value = self.get_DQN_prediction(state)
if not get_current_tower_context().is_training:
return
next_state = tf.identity(joint_state[:, 1, ...], name='next_state')
action_onehot = tf.one_hot(action, self.num_actions, 1.0, 0.0)
pred_action_value = tf.reduce_sum(self.predict_value * action_onehot,
1) # N,
max_pred_reward = tf.reduce_mean(tf.reduce_max(self.predict_value, 1),
name='predict_reward')
summary.add_moving_summary(max_pred_reward)
with tf.variable_scope('target'), varreplace.freeze_variables(
skip_collection=True):
# we are alternating between comb and fine states
targetQ_predict_value = self.get_DQN_prediction(next_state) # NxA
if self.method != 'Double':
# DQN
self.greedy_choice = tf.argmax(targetQ_predict_value +
(tf.to_float(next_mask) * 1e4),
1) # N,
predict_onehot = tf.one_hot(self.greedy_choice, self.num_actions,
1.0, 0.0)
best_v = tf.reduce_sum(targetQ_predict_value * predict_onehot, 1)
else:
# Double-DQN
next_predict_value = self.get_DQN_prediction(next_state)
self.greedy_choice = tf.argmax(
next_predict_value + (tf.to_float(next_mask) * 1e4), 1) # N,
predict_onehot = tf.one_hot(self.greedy_choice, self.num_actions,
1.0, 0.0)
best_v = tf.reduce_sum(targetQ_predict_value * predict_onehot, 1)
target = reward + (1.0 - tf.cast(
isOver, tf.float32)) * self.gamma * tf.stop_gradient(best_v)
l2_loss = tensorpack.regularize_cost('.*W{1}', l2_regularizer(1e-3))
# cost = tf.losses.mean_squared_error(target, pred_action_value)
cost = tf.losses.huber_loss(target,
pred_action_value,
reduction=tf.losses.Reduction.MEAN)
summary.add_param_summary(('.*/W', ['histogram',
'rms'])) # monitor all W
summary.add_moving_summary(cost)
return cost
def calc_inference_v1(end_points):
nms_iou = tf.get_variable('nms_iou', shape=[], initializer=tf.constant_initializer(0.25), trainable=False)
if not get_current_tower_context().is_training:
def get_3d_bbox(box_size, heading_angle, center):
batch_size = tf.shape(heading_angle)[0]
c = tf.cos(heading_angle)
s = tf.sin(heading_angle)
zeros = tf.zeros_like(c)
ones = tf.ones_like(c)
rotation = tf.reshape(tf.stack([c, zeros, s, zeros, ones, zeros, -s, zeros, c], -1),
tf.stack([batch_size, -1, 3, 3]))
l, w, h = box_size[..., 0], box_size[..., 1], box_size[..., 2] # lwh(xzy) order!!!
corners = tf.reshape(tf.stack([l / 2, l / 2, -l / 2, -l / 2, l / 2, l / 2, -l / 2, -l / 2,
h / 2, h / 2, h / 2, h / 2, -h / 2, -h / 2, -h / 2, -h / 2,
w / 2, -w / 2, -w / 2, w / 2, w / 2, -w / 2, -w / 2, w / 2], -1),
tf.stack([batch_size, -1, 3, 8]))
return tf.einsum('ijkl,ijlm->ijmk', rotation, corners) + tf.expand_dims(center, 2) # B * N * 8 * 3
class_mean_size_tf = tf.constant(class_mean_size)
size_cls_pred = tf.argmax(end_points['size_scores'], axis=-1) # (B, proposal_num)
size_cls_pred_onehot = tf.one_hot(size_cls_pred, depth=config.NS, axis=-1) # (B, proposal_num, NS)
size_residual_pred = tf.reduce_sum(tf.expand_dims(size_cls_pred_onehot, -1) # (B, proposal_num, NS, -1)
* tf.reshape(end_points['size_residuals_normalized'],
[-1, config.PROPOSAL_NUM, config.NS, 3]), axis=2)
# size_residual_pred : (B, proposal_num, 3)
size_pred = tf.gather_nd(class_mean_size_tf, tf.expand_dims(size_cls_pred, -1)) \
* tf.maximum(1 + size_residual_pred, 1e-6) # B * N * 3: size
# calc center
center_pred = end_points['center'] # (B, proposal_num, 3)
heading_cls_pred = tf.argmax(end_points['heading_scores'], axis=-1) # (B, proposal_num)
heading_cls_pred_onehot = tf.one_hot(heading_cls_pred, depth=config.NH, axis=-1) # (B, proposal_num, NH)
heading_residual_pred = tf.reduce_sum(heading_cls_pred_onehot * end_points['heading_residuals_normalized'], axis=2)
heading_pred = tf.floormod(
(tf.cast(heading_cls_pred, tf.float32) * 2 + heading_residual_pred) * np.pi / config.NH,
2 * np.pi)
# with tf.control_dependencies([tf.print(size_residual_pred[0, :10, :]), tf.print(size_pred[0, :10, :])]):
bboxes = get_3d_bbox(size_pred, heading_pred, center_pred) # B * N * 8 * 3, lhw(xyz) order!!!
# bbox_corners = tf.concat([bboxes[:, :, 6, :], bboxes[:, :, 0, :]], axis=-1) # B * N * 6, lhw(xyz) order!!!
# with tf.control_dependencies([tf.print(bboxes[0, 0])]):
nms_idx = NMS3D(bboxes, tf.reduce_max(end_points['sem_cls_scores'], axis=-1), end_points['objectness_scores'],
nms_iou) # Nnms * 2
bboxes_pred = tf.gather_nd(bboxes, nms_idx, name='bboxes_pred') # Nnms * 8 * 3
class_scores_pred = tf.gather_nd(end_points['sem_cls_scores'], nms_idx, name='class_scores_pred') # Nnms * C
batch_idx = tf.identity(nms_idx[:, 0], name='batch_idx') # Nnms, this is used to identify between batches
def _build_graph(self, inputs):
state, action, reward, isOver = inputs
state = tf.cast(state, tf.float32)
# TODO: wtf is this?
state = tf.slice(state, [0, 0, 0, 0, 0],
[-1, -1, -1, -1, self.channel],
name='state')
self.predict_value = self.get_DQN_prediction(state)
if not get_current_tower_context().is_training:
return
reward = tf.clip_by_value(reward, -1, 1)
# FIXME I think this is history buffer stuff
next_state = tf.slice(state, [0, 0, 0, 0, 1],
[-1, -1, -1, -1, self.channel],
name='next_state')
action_onehot = tf.one_hot(action, self.num_actions, 1.0, 0.0)
pred_action_value = tf.reduce_sum(self.predict_value * action_onehot,
1) # N,
max_pred_reward = tf.reduce_mean(tf.reduce_max(self.predict_value, 1),
name='predict_reward')
summary.add_moving_summary(max_pred_reward)
with tf.variable_scope('target'):
targetQ_predict_value = self.get_DQN_prediction(next_state) # NxA
# TODO disable other models
if 'Double' not in self.method:
# DQN or Dueling
best_v = tf.reduce_max(targetQ_predict_value, 1) # N,
else:
# Double-DQN or DuelingDouble
next_predict_value = self.get_DQN_prediction(next_state)
self.greedy_choice = tf.argmax(next_predict_value, 1) # N,
predict_onehot = tf.one_hot(self.greedy_choice, self.num_actions,
1.0, 0.0)
best_v = tf.reduce_sum(targetQ_predict_value * predict_onehot, 1)
target = reward + (1.0 - tf.cast(
isOver, tf.float32)) * self.gamma * tf.stop_gradient(best_v)
self.cost = tf.losses.huber_loss(target,
pred_action_value,
reduction=tf.losses.Reduction.MEAN)
summary.add_param_summary(
('conv.*/W', ['histogram', 'rms']),
('fc.*/W', ['histogram', 'rms'])) # monitor all W
summary.add_moving_summary(self.cost)
def _build_graph(self, inputs):
comb_state, action, reward, isOver = inputs
comb_state = tf.cast(comb_state, tf.float32)
state = tf.slice(comb_state, [0, 0, 0, 0], [-1, -1, -1, self.channel],
name='state')
self.predict_value = self._get_DQN_prediction(state)
if not get_current_tower_context().is_training:
return
reward = tf.clip_by_value(reward, -1, 1)
next_state = tf.slice(comb_state, [0, 0, 0, 1],
[-1, -1, -1, self.channel],
name='next_state')
action_onehot = tf.one_hot(action, self.num_actions, 1.0, 0.0)
pred_action_value = tf.reduce_sum(self.predict_value * action_onehot,
1) # N,
max_pred_reward = tf.reduce_mean(tf.reduce_max(self.predict_value, 1),
name='predict_reward')
summary.add_moving_summary(max_pred_reward)
with tf.variable_scope('target'), \
collection.freeze_collection([tf.GraphKeys.TRAINABLE_VARIABLES]):
targetQ_predict_value = self._get_DQN_prediction(next_state) # NxA
if self.method != 'Double':
# DQN
best_v = tf.reduce_max(targetQ_predict_value, 1) # N,
else:
# Double-DQN
sc = tf.get_variable_scope()
with tf.variable_scope(sc, reuse=True):
next_predict_value = self._get_DQN_prediction(next_state)
self.greedy_choice = tf.argmax(next_predict_value, 1) # N,
predict_onehot = tf.one_hot(self.greedy_choice, self.num_actions,
1.0, 0.0)
best_v = tf.reduce_sum(targetQ_predict_value * predict_onehot, 1)
target = reward + (1.0 - tf.cast(
isOver, tf.float32)) * self.gamma * tf.stop_gradient(best_v)
self.cost = tf.reduce_mean(symbf.huber_loss(target -
pred_action_value),
name='cost')
summary.add_param_summary(
('conv.*/W', ['histogram', 'rms']),
('fc.*/W', ['histogram', 'rms'])) # monitor all W
summary.add_moving_summary(self.cost)
def generate_rpn_proposals(boxes, scores, img_shape):
"""
Args:
boxes: nx4 float dtype, decoded to floatbox already
scores: n float, the logits
img_shape: [h, w]
Returns:
boxes: kx4 float
scores: k logits
"""
assert boxes.shape.ndims == 2, boxes.shape
if get_current_tower_context().is_training:
PRE_NMS_TOPK = config.TRAIN_PRE_NMS_TOPK
POST_NMS_TOPK = config.TRAIN_POST_NMS_TOPK
else:
PRE_NMS_TOPK = config.TEST_PRE_NMS_TOPK
POST_NMS_TOPK = config.TEST_POST_NMS_TOPK
topk = tf.minimum(PRE_NMS_TOPK, tf.size(scores))
topk_scores, topk_indices = tf.nn.top_k(scores, k=topk, sorted=False)
topk_boxes = tf.gather(boxes, topk_indices)
topk_boxes = clip_boxes(topk_boxes, img_shape)
topk_boxes_x1y1x2y2 = tf.reshape(topk_boxes, (-1, 2, 2))
topk_boxes_x1y1, topk_boxes_x2y2 = tf.split(topk_boxes_x1y1x2y2, 2, axis=1)
# nx1x2 each
wbhb = tf.squeeze(topk_boxes_x2y2 - topk_boxes_x1y1, axis=1)
valid = tf.reduce_all(wbhb > config.RPN_MIN_SIZE, axis=1) # n,
topk_valid_boxes_x1y1x2y2 = tf.boolean_mask(topk_boxes_x1y1x2y2, valid)
topk_valid_scores = tf.boolean_mask(topk_scores, valid)
topk_valid_boxes_y1x1y2x2 = tf.reshape(
tf.reverse(topk_valid_boxes_x1y1x2y2, axis=[2]),
(-1, 4), name='nms_input_boxes')
nms_indices = tf.image.non_max_suppression(
topk_valid_boxes_y1x1y2x2,
topk_valid_scores,
max_output_size=POST_NMS_TOPK,
iou_threshold=config.RPN_PROPOSAL_NMS_THRESH)
topk_valid_boxes = tf.reshape(topk_valid_boxes_x1y1x2y2, (-1, 4))
final_boxes = tf.gather(
topk_valid_boxes,
nms_indices, name='boxes')
final_scores = tf.gather(topk_valid_scores, nms_indices, name='scores')
tf.sigmoid(final_scores, name='probs') # for visualization
return final_boxes, final_scores
def _get_logits(self, image):
ctx = get_current_tower_context()
with maybe_freeze_updates(ctx.index > 0):
network = ConvNetBuilder(
image, 3, True,
use_tf_layers=True,
data_format=self.data_format,
dtype=tf.float16 if args.use_fp16 else tf.float32,
variable_dtype=tf.float32)
with custom_getter_scope(network.get_custom_getter()):
dataset = lambda: 1
dataset.name = 'imagenet'
model_conf = model_config.get_model_config('resnet50', dataset)
model_conf.set_batch_size(args.batch)
model_conf.add_inference(network)
return network.affine(1000, activation='linear', stddev=0.001)
def _build_graph(self, inputs):
self.r_mel, self.t_spec, self.t_mel, self.r_spec = inputs
is_training = get_current_tower_context().is_training
# build net
with tf.variable_scope('net'):
self.pred_spec, self.pred_mel = self.network(self.r_mel, is_training)
self.pred_spec = tf.identity(self.pred_spec, name='pred_spec')
self.cost = self.loss()
# summaries
tf.summary.scalar('net/train/loss', self.cost)
if not is_training:
tf.summary.scalar('net/eval/summ_loss', self.cost)
def _build_graph(self, inputs):
wav, melspec = inputs
is_training = get_current_tower_context().is_training
out = self(*inputs, is_training=is_training)
if is_training:
with tf.name_scope('loss'):
l_loss = l1_loss(out=out, y=wav)
p_loss = power_loss(out=tf.squeeze(out, -1),
y=tf.squeeze(wav, -1),
win_length=hp.signal.win_length,
hop_length=hp.signal.hop_length)
tf.summary.scalar('likelihood', l_loss)
self.cost = l_loss + hp.train.weight_power_loss * p_loss
if hp.train.weight_power_loss > 0:
tf.summary.scalar('power', p_loss)
tf.summary.scalar('total_loss', self.cost)
def __init__(self, proposals, roi_func, fastrcnn_head_func, image_shape2d,
num_classes):
"""
Args:
proposals: BoxProposals
roi_func (boxes -> features): a function to crop features with rois
fastrcnn_head_func (features -> features): the fastrcnn head to apply on the cropped features
"""
for k, v in locals().items():
if k != 'self':
setattr(self, k, v)
self.num_cascade_stages = cfg.CASCADE.NUM_STAGES
self.is_training = get_current_tower_context().is_training
if self.is_training:
@tf.contrib.eager.custom_gradient
def scale_gradient(x):
return x, lambda dy: dy * (1.0 / self.num_cascade_stages)
self.scale_gradient = scale_gradient
self.gt_boxes = proposals.gt_boxes
self.gt_labels = proposals.gt_labels
else:
self.scale_gradient = tf.identity
ious = cfg.CASCADE.IOUS
# It's unclear how to do >3 stages, so it does not make sense to implement them
assert self.num_cascade_stages == 3, "Only 3-stage cascade was implemented!"
with tf.variable_scope('cascade_rcnn_stage1'):
H1, B1 = self.run_head(self.proposals, 0)
with tf.variable_scope('cascade_rcnn_stage2'):
B1_proposal = self.match_box_with_gt(B1, ious[1])
H2, B2 = self.run_head(B1_proposal, 1)
with tf.variable_scope('cascade_rcnn_stage3'):
B2_proposal = self.match_box_with_gt(B2, ious[2])
H3, B3 = self.run_head(B2_proposal, 2)
self._cascade_boxes = [B1, B2, B3]
self._heads = [H1, H2, H3]
def build_graph(self, comb_state, action, reward, isOver):
comb_state = tf.cast(comb_state, tf.float32)
comb_state = tf.reshape(
comb_state, [-1] + list(self._shape2d) + [self.history + 1, self.channel])
state = tf.slice(comb_state, [0, 0, 0, 0, 0], [-1, -1, -1, self.history, -1])
state = tf.reshape(state, self._shape4d_for_prediction, name='state')
self.predict_value = self.get_DQN_prediction(state)
if not get_current_tower_context().is_training:
return
reward = tf.clip_by_value(reward, -1, 1)
next_state = tf.slice(comb_state, [0, 0, 0, 1, 0], [-1, -1, -1, self.history, -1], name='next_state')
next_state = tf.reshape(next_state, self._shape4d_for_prediction)
action_onehot = tf.one_hot(action, self.num_actions, 1.0, 0.0)
pred_action_value = tf.reduce_sum(self.predict_value * action_onehot, 1) # N,
max_pred_reward = tf.reduce_mean(tf.reduce_max(
self.predict_value, 1), name='predict_reward')
summary.add_moving_summary(max_pred_reward)
with tf.variable_scope('target'), varreplace.freeze_variables(skip_collection=True):
targetQ_predict_value = self.get_DQN_prediction(next_state) # NxA
if self.method != 'Double':
# DQN
best_v = tf.reduce_max(targetQ_predict_value, 1) # N,
else:
# Double-DQN
next_predict_value = self.get_DQN_prediction(next_state)
self.greedy_choice = tf.argmax(next_predict_value, 1) # N,
predict_onehot = tf.one_hot(self.greedy_choice, self.num_actions, 1.0, 0.0)
best_v = tf.reduce_sum(targetQ_predict_value * predict_onehot, 1)
target = reward + (1.0 - tf.cast(isOver, tf.float32)) * self.gamma * tf.stop_gradient(best_v)
cost = tf.losses.huber_loss(
target, pred_action_value, reduction=tf.losses.Reduction.MEAN)
summary.add_param_summary(('conv.*/W', ['histogram', 'rms']),
('fc.*/W', ['histogram', 'rms'])) # monitor all W
summary.add_moving_summary(cost)
return cost
def DepthwiseSeparableConvWithTrackedMults(inputs,
out_channels,
depth_multiplier=0.25,
network_complexity=None,
downsample=False,
nl=tf.identity):
out_channels = round(out_channels * depth_multiplier)
filter_shape = [3, 3]
_stride = 2 if downsample else 1
# tf.nn.relu is default activation; applies activation after batchnorm, but setting normalizer=None
depthwise_conv = tf.contrib.layers.separable_conv2d(
inputs,
num_outputs=None,
depth_multiplier=1,
stride=_stride,
kernel_size=filter_shape,
biases_initializer=None,
normalizer_fn=None,
activation_fn=nl)
pointwise_conv = tf.identity(depthwise_conv, name='output')
if get_current_tower_context().is_main_training_tower:
in_shape = inputs.get_shape().as_list()
network_complexity['weights'] += filter_shape[0] * filter_shape[
1] * in_shape[-1] # assuming 'NHWC'
network_complexity['mults'] += in_shape[1] * in_shape[
2] * filter_shape[0] * filter_shape[1] * in_shape[-1]
# network complexity handled in Conv2DWithTrackedMults
pointwise_conv = Conv2DWithTrackedMults(
'PointwiseConv2D',
depthwise_conv,
out_channels,
kernel_shape=1,
use_bias=False,
nl=nl,
network_complexity=network_complexity)
return pointwise_conv
def _build_graph(self, inputs):
self.x_mfccs, self.y_ppgs = inputs
is_training = get_current_tower_context().is_training
with tf.variable_scope('net1'):
self.ppgs, self.preds, self.logits = self.network(
self.x_mfccs, is_training)
self.cost = self.loss()
acc = self.acc()
if is_training:
# summaries
tf.summary.scalar('net1/train/loss', self.cost)
tf.summary.scalar('net1/train/acc', acc)
if not is_training:
# summaries
self.cost = tf.identity(self.cost, name="net1/eval/loss")
acc = tf.identity(acc, name="net1/eval/acc")
tf.summary.scalar('net1/eval/loss', self.cost)
tf.summary.scalar('net1/eval/acc', acc)
def __init__(self, proposals,
roi_func, fastrcnn_head_func, image_shape2d, num_classes):
"""
Args:
proposals: BoxProposals
roi_func (boxes -> features): a function to crop features with rois
fastrcnn_head_func (features -> features): the fastrcnn head to apply on the cropped features
"""
for k, v in locals().items():
if k != 'self':
setattr(self, k, v)
self.num_cascade_stages = cfg.CASCADE.NUM_STAGES
self.is_training = get_current_tower_context().is_training
if self.is_training:
@tf.custom_gradient
def scale_gradient(x):
return x, lambda dy: dy * (1.0 / self.num_cascade_stages)
self.scale_gradient = scale_gradient
self.gt_boxes = proposals.gt_boxes
self.gt_labels = proposals.gt_labels
else:
self.scale_gradient = tf.identity
ious = cfg.CASCADE.IOUS
# It's unclear how to do >3 stages, so it does not make sense to implement them
assert self.num_cascade_stages == 3, "Only 3-stage cascade was implemented!"
with tf.variable_scope('cascade_rcnn_stage1'):
H1, B1 = self.run_head(self.proposals, 0)
with tf.variable_scope('cascade_rcnn_stage2'):
B1_proposal = self.match_box_with_gt(B1, ious[1])
H2, B2 = self.run_head(B1_proposal, 1)
with tf.variable_scope('cascade_rcnn_stage3'):
B2_proposal = self.match_box_with_gt(B2, ious[2])
H3, B3 = self.run_head(B2_proposal, 2)
self._cascade_boxes = [B1, B2, B3]
self._heads = [H1, H2, H3]
def RescaleActivationLayer(inputs, decay=0.9, bit_a=8):
in_shape = inputs.get_shape().as_list()
moving_max = tf.get_variable('activation_max/EMA', [in_shape[-1]],
initializer=tf.constant_initializer(),
trainable=False)
moving_min = tf.get_variable('activation_min/EMA', [in_shape[-1]],
initializer=tf.constant_initializer(),
trainable=False)
named_inputs = tf.identity(inputs, name='rescaling_input_activation')
# xn = (named_inputs - moving_min) / tf.pow(tf.constant(2.0), log2(moving_max) - tf.constant(float(bit_a)))
xn = (named_inputs -
(moving_min + moving_max) / 2.0) / (moving_max - moving_min)
named_xn = tf.identity(xn, name='rescaled_activation')
named_xn = tf.Print(named_xn, [named_xn])
ctx = get_current_tower_context()
if ctx.is_main_training_tower:
ret = update_ema(xn, moving_max, moving_min, decay)
else:
ret = tf.identity(xn, name='output')
vh = ret.variables = VariableHolder(mean=moving_max, variance=moving_min)
return ret
