def where(self, mask, tensor_in_1, tensor_in_2):
"""
Apply a boolean selection mask to the elements of the input tensors.
Example:
>>> import pyhf
>>> pyhf.set_backend(pyhf.tensor.mxnet_backend())
>>> pyhf.tensorlib.where(
... pyhf.tensorlib.astensor([1, 0, 1]),
... pyhf.tensorlib.astensor([1, 1, 1]),
... pyhf.tensorlib.astensor([2, 2, 2]))
...
<BLANKLINE>
[1. 2. 1.]
<NDArray 3 @cpu(0)>
Args:
mask (bool): Boolean mask (boolean or tensor object of booleans)
tensor_in_1 (Tensor): Tensor object
tensor_in_2 (Tensor): Tensor object
Returns:
MXNet NDArray: The result of the mask being applied to the tensors.
"""
mask = self.astensor(mask)
tensor_in_1 = self.astensor(tensor_in_1)
tensor_in_2 = self.astensor(tensor_in_2)
return nd.add(
nd.multiply(mask, tensor_in_1),
nd.multiply(nd.subtract(1, mask), tensor_in_2),
)
def where(self, mask, tensor_in_1, tensor_in_2):
"""
Apply a boolean selection mask to the elements of the input tensors.
Example::
>>> where(
astensor([1, 0, 1]),
astensor([1, 1, 1]),
astensor([2, 2, 2]))
[1. 2. 1.]
Args:
mask (bool): Boolean mask (boolean or tensor object of booleans)
tensor_in_1 (Tensor): Tensor object
tensor_in_2 (Tensor): Tensor object
Returns:
MXNet NDArray: The result of the mask being applied to the tensors.
"""
mask = self.astensor(mask)
tensor_in_1 = self.astensor(tensor_in_1)
tensor_in_2 = self.astensor(tensor_in_2)
return nd.add(nd.multiply(mask, tensor_in_1),
nd.multiply(nd.subtract(1, mask), tensor_in_2))
def forward(self, inputs, begin_state=None): # pylint: disable=arguments-differ
"""Implement the forward computation that the awd language model and cache model use.
Parameters
-----------
inputs : NDArray
input tensor with shape `(sequence_length, batch_size)`
when `layout` is "TNC".
begin_state : list
initial recurrent state tensor with length equals to num_layers.
the initial state with shape `(1, batch_size, num_hidden)`
Returns
--------
out: NDArray
output tensor with shape `(sequence_length, batch_size, input_size)`
when `layout` is "TNC".
out_states: list
output recurrent state tensor with length equals to num_layers.
the state with shape `(1, batch_size, num_hidden)`
encoded_raw: list
The list of outputs of the model's encoder with length equals to num_layers.
the shape of every encoder's output `(sequence_length, batch_size, num_hidden)`
encoded_dropped: list
The list of outputs with dropout of the model's encoder with length equals
to num_layers. The shape of every encoder's dropped output
`(sequence_length, batch_size, num_hidden)`
"""
encoded = self.embedding(inputs)
if not begin_state:
begin_state = self.begin_state(batch_size=inputs.shape[1])
out_states = []
encoded_raw = []
encoded_dropped = []
for i, (e, s) in enumerate(zip(self.encoder, begin_state)):
encoded, state = e(encoded, s)
encoded_raw.append(encoded)
out_states.append(state)
if self._drop_h and i != len(self.encoder)-1:
encoded = nd.Dropout(encoded, p=self._drop_h, axes=(0,))
encoded_dropped.append(encoded)
if self._dropout:
encoded = nd.Dropout(encoded, p=self._dropout, axes=(0,))
encoded_dropped.append(encoded)
latent = nd.Dropout(self.latent(encoded), p=self._drop_l, axes=(0,))
logit = self.decoder(latent.reshape(-1, self._embed_size))
prior_logit = self.prior(encoded).reshape(-1, self._num_experts)
prior = nd.softmax(prior_logit)
prob = nd.softmax(logit.reshape(-1, self._vocab_size))
prob = prob.reshape(-1, self._num_experts, self._vocab_size)
prob = (prob * prior.expand_dims(2).broadcast_to(prob.shape)).sum(axis=1)
out = nd.log(nd.add(prob, 1e-8)).reshape(-1, inputs.shape[1], self._vocab_size)
return out, out_states, encoded_raw, encoded_dropped
def test_513():
# 边缘检测小例
X = nd.ones((8, 8))
X[2:6, 2:6] = 0
print(X)
'''
原始图片，任务是进行边缘检测
[
[1. 1. 1. 1. 1. 1. 1. 1.]
[1. 1. 1. 1. 1. 1. 1. 1.]
[1. 1. 0. 0. 0. 0. 1. 1.]
[1. 1. 0. 0. 0. 0. 1. 1.]
[1. 1. 0. 0. 0. 0. 1. 1.]
[1. 1. 0. 0. 0. 0. 1. 1.]
[1. 1. 1. 1. 1. 1. 1. 1.]
[1. 1. 1. 1. 1. 1. 1. 1.]
]
'''
# 构造kernel
K1 = nd.array([[1, -1], [1, -1]])
Y1 = corr2d(X, K1)
print(Y1)
'''
检测纵向边缘
[[ 0. 0. 0. 0. 0. 0. 0.]
[ 0. 1. 0. 0. 0. -1. 0.]
[ 0. 2. 0. 0. 0. -2. 0.]
[ 0. 2. 0. 0. 0. -2. 0.]
[ 0. 2. 0. 0. 0. -2. 0.]
[ 0. 1. 0. 0. 0. -1. 0.]
[ 0. 0. 0. 0. 0. 0. 0.]]
'''
# 构造kernel
K2 = nd.array([[1, 1], [-1, -1]])
Y2 = corr2d(X, K2)
print(Y2)
'''
检测横向边缘
[[ 0. 0. 0. 0. 0. 0. 0.]
[ 0. 1. 2. 2. 2. 1. 0.]
[ 0. 0. 0. 0. 0. 0. 0.]
[ 0. 0. 0. 0. 0. 0. 0.]
[ 0. 0. 0. 0. 0. 0. 0.]
[ 0. -1. -2. -2. -2. -1. 0.]
[ 0. 0. 0. 0. 0. 0. 0.]]
'''
Y3 = nd.add(nd.abs(Y1), nd.abs(Y2))
print(Y3)
'''
def forward(self, inputs, begin_state=None):
"""Implement forward computation.
Parameters
----------
inputs : NDArray
The training dataset.
begin_state : list
The initial hidden states.
Returns
-------
out: NDArray
The output of the model.
out_states: list
The list of output states of the model's encoder.
"""
encoded = self.embedding(inputs)
if not begin_state:
begin_state = self.begin_state(batch_size=inputs.shape[1])
out_states = []
encoded_raw = []
encoded_dropped = []
for i, (e, s) in enumerate(zip(self.encoder, begin_state)):
encoded, state = e(encoded, s)
encoded_raw.append(encoded)
out_states.append(state)
if self._drop_h and i != len(self.encoder) - 1:
encoded = nd.Dropout(encoded, p=self._drop_h, axes=(0, ))
encoded_dropped.append(encoded)
if self._dropout:
encoded = nd.Dropout(encoded, p=self._dropout, axes=(0, ))
states = out_states
encoded_dropped.append(encoded)
latent = nd.Dropout(self.latent(encoded), p=self._drop_l, axes=(0, ))
logit = self.decoder(latent.reshape(-1, self._embed_size))
prior_logit = self.prior(encoded).reshape(-1, self._num_experts)
prior = nd.softmax(prior_logit)
prob = nd.softmax(logit.reshape(-1, self._vocab_size))
prob = prob.reshape(-1, self._num_experts, self._vocab_size)
prob = (prob *
prior.expand_dims(2).broadcast_to(prob.shape)).sum(axis=1)
out = nd.log(nd.add(prob, 1e-8)).reshape(-1, inputs.shape[1],
self._vocab_size)
return out, out_states, encoded_raw, encoded_dropped
def fusionFMaps(lMap, sMap, upconv_ksize=3, method='upconv'):
# lMap/sMap stand for large/small feature maps
# methods: 'upconv', 'lin_interpol'
s_channels = sMap.shape[1]
l_channels = lMap.shape[1]
# if s_channels != l_channels:
# raise ValueError("ERROR [jcy checkpoint]: Inconsistent feature-map channels."
# " Check the channels of neighboring layers. ")
if method == 'upconv':
upconver = nn.HybridSequential()
upconver.add(
nn.Conv2DTranspose(channels=l_channels,
kernel_size=upconv_ksize,
activation='relu'),
nn.BatchNorm(in_channels=l_channels))
upconver.initialize(
ctx=mx.gpu()) # how to init? should I make the params trainable?
upconv_sMap = upconver(sMap)
# TODO: Modify this. Figure out a way to deal with size problem brought by pooling
upconv_sMap = nd.contrib.BilinearResize2D(data=upconv_sMap,
height=lMap.shape[-2],
width=lMap.shape[-1])
elif method == 'bilinear':
upconv_sMap = nd.contrib.BilinearResize2D(data=sMap,
height=lMap.shape[-2],
width=lMap.shape[-1])
# NO !! We must unify the feature channels of the up-down path! Or the color would be eliminated.
# consider re-enable this when things are done and you are ready for the training of
# the params in upconv blks
# ^
# ^ this is not a problem asshole. Do you think that color images are special?
else:
raise Exception(
"ERROR! [jcy checkpoint]: Unexpected enlarging method.")
res = nd.add(lMap + upconv_sMap) / 2 # add large fmap with the smaller one
res = res / nd.max(res)
# return (res, upconv_sMap)
return res
def forward(self,
inputs,
begin_state=None,
token_types=None,
valid_length=None,
masked_positions=None): # pylint: disable=arguments-differ
"""Implement the forward computation that the awd language model and cache model use.
Parameters
-----------
inputs : NDArray
input tensor with shape `(sequence_length, batch_size)`
when `layout` is "TNC".
begin_state : list
initial recurrent state tensor with length equals to num_layers.
the initial state with shape `(1, batch_size, num_hidden)`
token_types: NDArray
input token type tensor, shape (batch_size, seq_length).
If the inputs contain two sequences, then the token type of the first
sequence differs from that of the second one.
valid_length: NDArray
optional tensor of input sequence valid lengths, shape (batch_size,)
masked_positions: optional tensor of position of tokens for masked LM decoding,
shape (batch_size, num_masked_positions).
Returns
--------
out: NDArray
output tensor with shape `(sequence_length, batch_size, input_size)`
when `layout` is "TNC".
out_states: list
output recurrent state tensor with length equals to num_layers.
the state with shape `(1, batch_size, num_hidden)`
encoded_raw: list
The list of outputs of the model's encoder with length equals to num_layers.
the shape of every encoder's output `(sequence_length, batch_size, num_hidden)`
encoded_dropped: list
The list of outputs with dropout of the model's encoder with length equals
to num_layers. The shape of every encoder's dropped output
`(sequence_length, batch_size, num_hidden)`
"""
batch_size = inputs.shape[1]
inputs = nd.transpose(inputs, axes=(1, 0))
if token_types is None:
token_types = nd.zeros_like(inputs)
encoded = self.embedding(inputs,
token_types=token_types,
valid_length=valid_length,
masked_positions=masked_positions)
encoded = nd.transpose(encoded, axes=(1, 0, 2))
encoded = nd.Dropout(encoded, p=self._drop_i, axes=(0, ))
if not begin_state:
begin_state = self.begin_state(batch_size=batch_size)
out_states = []
encoded_raw = []
encoded_dropped = []
for i, (e, s) in enumerate(zip(self.encoder, begin_state)):
encoded, state = e(encoded, s)
encoded_raw.append(encoded)
out_states.append(state)
if i != len(self.encoder) - 1:
encoded = nd.Dropout(encoded, p=self._drop_h, axes=(0, ))
encoded_dropped.append(encoded)
encoded = nd.Dropout(encoded, p=self._dropout, axes=(0, ))
encoded_dropped.append(encoded)
#use mos
latent = nd.Dropout(self.latent(encoded), p=self._drop_l, axes=(0, ))
logit = self.decoder(latent.reshape(-1, self._embed_size))
prior_logit = self.prior(encoded).reshape(-1, self._num_experts)
prior = nd.softmax(prior_logit, axis=-1)
prob = nd.softmax(logit.reshape(-1, self._vocab_size), axis=-1)
prob = prob.reshape(-1, self._num_experts, self._vocab_size)
prob = (prob *
prior.expand_dims(2).broadcast_to(prob.shape)).sum(axis=1)
out = nd.log(nd.add(prob, 1e-8)).reshape(-1, batch_size,
self._vocab_size)
return out, out_states, encoded_raw, encoded_dropped
class RepulsionLoss(gluon.Block):
def __init__(self, iou_thresh=0.5, sigma=0.5, epo=0.1, **kwargs):
super(RepulsionLoss, self).__init__(**kwargs)
self.iou_thresh = iou_thresh
self.sigma = sigma
self.epo = epo
def Smooth_Ln(self, x, sigma):
large = np.where(x > sigma)
small = np.where(x <= sigma)
large = x[large]
small = x[small]
large = np.sum((large - sigma) / (1 - sigma) - np.log(1 - sigma))
small = np.sum(-np.log(1 - small))
return (large + small)
def forward(self,
cls_preds,
box_preds,
cls_targets,
box_targets,
loss=None):
RepLoss = []
all_box_gt = box_targets[0].asnumpy()
all_box_pred = box_preds[0].asnumpy()
for i in range(all_box_pred.shape[0]):
#filter out all zero rows(mainly gt)
nonzero_boxgt_index = np.where(
all_box_gt[i][:, 0] != all_box_gt[i][:, 2])
nonzero_boxpred_index = np.where(
all_box_pred[i][:, 0] != all_box_pred[i][:, 2])
nonzero_box_gt = all_box_gt[i][nonzero_boxgt_index][:, 0:4]
nonzero_box_pred = all_box_pred[i][nonzero_boxpred_index][:, 0:4]
#calculate iou
_iou = bbox_iou(nonzero_box_pred, nonzero_box_gt)
# select positive proposals
pos_index = np.where(np.max(_iou, axis=1) >= self.iou_thresh)
_iou = _iou[pos_index]
#for each positive proposals keep its top two iou with targets
sort_index = _iou.argsort(axis=1)[:, -2:]
iog = []
for _i in range(len(sort_index)):
tmp = _iou[_i, sort_index[_i]]
iog.append(tmp)
iog = np.array(iog)
if iog.shape[0] == 0:
RepGT = 0
RepBo = 0
else:
#RepulsionGT
RepGT = self.Smooth_Ln(iog[:, 0], self.sigma) / iog.shape[0]
#for each ground truth keep only the proposal with highest iou
pos_gt_prop_index = np.argmax(_iou, axis=0)
pos_gt_prop = np.array([
nonzero_box_pred[pos_gt_prop_index],
nonzero_box_pred[pos_gt_prop_index]
])
# RepulsionBox
box_l = np.array([])
total_iou = np.array([])
for row in range(len(pos_gt_prop[0]) - 1):
curr = pos_gt_prop[0][row].reshape(1, -1)
rest = pos_gt_prop[1][row + 1:]
_bbox_iou = bbox_iou(curr, rest)
box_l = np.hstack((box_l, [self.Smooth_Ln(_bbox_iou, self.sigma)]))
total_iou = np.hstack((total_iou, [np.sum(_bbox_iou)]))
RepBo = np.sum(box_l) / (np.sum(total_iou) + self.epo)
RepLoss.append(RepGT + RepBo)
RepLoss = [nd.array(RepLoss, ctx=mx.gpu(0))]
if loss:
sum_loss, cls_loss, box_loss = loss(cls_preds, box_preds, cls_targets,
box_targets) #TODO:YOLO-VERSION
return nd.add(RepLoss[0], sum_loss[0]), cls_loss, box_loss
else:
return RepLoss, 0, 0
def nodeforward(self, x, cs, hs, ctx):
x = nd.reshape(x, (self.dim_h, ))
_Ui = nd.zeros((self.dim_h, ), ctx=ctx)
_Uo = nd.zeros((self.dim_h, ), ctx=ctx)
_Uu = nd.zeros((self.dim_h, ), ctx=ctx)
_Uf = [nd.zeros((self.dim_h, ), ctx=ctx) for i in range(len(cs))]
for idx in range(len(cs)):
_Ui = nd.add(_Ui, nd.dot(self.Uis[idx].data(), hs[idx]))
_Uo = nd.add(_Uo, nd.dot(self.Uos[idx].data(), hs[idx]))
_Uu = nd.add(_Uu, nd.dot(self.Uus[idx].data(), hs[idx]))
for j in range(len(cs)):
_Uf[idx] = nd.add(_Uf[idx],
nd.dot(self.Ufs[idx][j].data(), hs[j]))
i = nd.sigmoid(
nd.add(nd.add(nd.dot(self.Wi.data(), x), _Ui), self.bi.data()))
o = nd.sigmoid(
nd.add(nd.add(nd.dot(self.Wo.data(), x), _Uo), self.bo.data()))
f = [
nd.sigmoid(
nd.add(nd.add(nd.dot(self.Wf.data(), x), _Uf[idx]),
self.bf.data())) for idx in range(len(cs))
]
u = nd.tanh(
nd.add(nd.add(nd.dot(self.Wu.data(), x), _Uu), self.bu.data()))
c = nd.zeros((self.dim_h, ), ctx=ctx)
for idx in range(len(cs)):
c = nd.add(c, nd.multiply(f[idx], cs[idx]))
c = nd.add(nd.multiply(i, u), c)
h = nd.multiply(o, nd.tanh(c))
return c, h
def dense_fw(self, x):
"""Fully connected layer forward process."""
self.z = nd.add(nd.dot(x, self.W), self.b)
self.output = self.act(self.z)
return self.output