def bound_layer(val_in, bound_val, name="bound_scale"):
with tf.name_scope(name):
# Bound val_in between -1..1 and scale by multipling by bound_val
activation = tf.multiply(tf.atan(val_in), bound_val)
# Add summaries for helping debug
tf.summary.histogram("val_in", val_in)
tf.summary.histogram("activation", activation)
return activation
def scharr_edges(image, magnitude):
"""
Returns a tensor holding modified Scharr edge maps.
Arguments:
image: Image tensor with shape [batch_size, h, w, d] and type float32.
The image(s) must be 2x2 or larger.
magnitude: Boolean to determine if the edge magnitude or edge direction is returned
Returns:
Tensor holding edge maps for each channel. Returns a tensor with shape
[batch_size, h, w, d, 2] where the last two dimensions hold [[dy[0], dx[0]],
[dy[1], dx[1]], ..., [dy[d-1], dx[d-1]]] calculated using the Scharr filter.
"""
# Define vertical and horizontal Scharr filters.
static_image_shape = image.get_shape()
image_shape = tf.shape(image)
# modified 3x3 Scharr
# kernels = [[[-17.0, -61.0, -17.0], [0.0, 0.0, 0.0], [17.0, 61.0, 17.0]],
# [[-17.0, 0.0, 17.0], [-61.0, 0.0, 61.0], [-17.0, 0.0, 17.0]]]
# 5x5 Scharr
kernels = [[[-1.0, -2.0, -3.0, -2.0, -1.0],
[-1.0, -2.0, -6.0, -2.0, -1.0],
[0.0, 0.0, 0.0, 0.0, 0.0],
[1.0, 2.0, 6.0, 2.0, 1.0],
[1.0, 2.0, 3.0, 2.0, 1.0]],
[[-1.0, -1.0, 0.0, 1.0, 1.0],
[-2.0, -2.0, 0.0, 2.0, 2.0],
[-3.0, -6.0, 0.0, 6.0, 3.0],
[-2.0, -2.0, 0.0, 2.0, 2.0],
[-1.0, -1.0, 0.0, 1.0, 1.0]]]
num_kernels = len(kernels)
kernels = np.transpose(np.asarray(kernels), (1, 2, 0))
kernels = np.expand_dims(kernels, -2) / np.sum(np.abs(kernels))
kernels_tf = tf.constant(kernels, dtype=image.dtype)
kernels_tf = tf.tile(kernels_tf, [1, 1, image_shape[-1], 1], name='scharr_filters')
# Use depth-wise convolution to calculate edge maps per channel.
pad_sizes = [[0, 0], [2, 2], [2, 2], [0, 0]]
padded = tf.pad(image, pad_sizes, mode='REFLECT')
# Output tensor has shape [batch_size, h, w, d * num_kernels].
strides = [1, 1, 1, 1]
output = tf.nn.depthwise_conv2d(padded, kernels_tf, strides, 'VALID')
# Reshape to [batch_size, h, w, d, num_kernels].
shape = tf.concat([image_shape, [num_kernels]], 0)
output = tf.reshape(output, shape=shape)
output.set_shape(static_image_shape.concatenate([num_kernels]))
if magnitude: # magnitude of edges
output = tf.sqrt(tf.reduce_sum(tf.square(output), axis=-1))
else: # direction of edges
output = tf.atan(tf.squeeze(tf.div(output[:, :, :, :, 0]/output[:, :, :, :, 1])))
return output
def get_angle(page):
img = tf.cast(page.image, tf.float32)
square = get_square(img)
f = tf.complex_abs(tf.fft2d(tf.cast(square, tf.complex64))[:MAX_SIZE//2, :])
x_arr = (
tf.cast(tf.concat(0,
[tf.range(MAX_SIZE // 2),
tf.range(1, MAX_SIZE // 2 + 1)[::-1]]),
tf.float32))[None, :]
y_arr = tf.cast(tf.range(MAX_SIZE // 2), tf.float32)[:, None]
f = tf.select(x_arr * x_arr + y_arr * y_arr < 32 * 32, tf.zeros_like(f), f)
m = tf.argmax(tf.reshape(f, [-1]), dimension=0)
x = tf.cast((m + MAX_SIZE // 4) % (MAX_SIZE // 2) - (MAX_SIZE // 4), tf.float32)
y = tf.cast(tf.floordiv(m, MAX_SIZE // 2), tf.float32)
return(tf.cond(
y > 0, lambda: tf.atan(x / y), lambda: tf.constant(np.nan, tf.float32)),
square)
def call(self, inputs, mask=None):
# Import graph tensors
# scalar_features = (samples, max_atoms, atom_feat)
# vector_features = (samples, max_atoms, coor_dims, atom_feat)
scalar_features, vector_features = inputs
# Get parameters
coor_dims = int(vector_features.shape[2])
atom_feat = int(vector_features.shape[-1])
# Integrate over atom axis
if self.pooling == "sum":
scalar_features = tf.reduce_sum(scalar_features, axis=1)
vector_features = tf.reduce_sum(vector_features, axis=1)
elif self.pooling == "avg":
scalar_features = tf.reduce_mean(scalar_features, axis=1)
vector_features = tf.reduce_mean(vector_features, axis=1)
elif self.pooling == "max":
scalar_features = tf.reduce_max(scalar_features, axis=1)
vector_features = tf.transpose(vector_features, perm=[0, 2, 3, 1])
size = tf.sqrt(tf.reduce_sum(tf.square(vector_features), axis=1))
idx = tf.reshape(tf.argmax(size, axis=-1, output_type=tf.int32),
[-1, 1, atom_feat, 1])
idx = tf.tile(idx, [1, coor_dims, 1, 1])
vector_features = tf.reshape(tf.batch_gather(vector_features, idx),
[-1, coor_dims, atom_feat])
# Activation
scalar_features = self.activation(scalar_features)
vector_features = self.activation(vector_features)
if self.system == "spherical":
x, y, z = tf.unstack(vector_features, axis=1)
r = tf.sqrt(tf.square(x) + tf.square(y) + tf.square(z))
t = tf.acos(tf.divide(z, r + tf.cast(tf.equal(r, 0), dtype=float)))
p = tf.atan(tf.divide(y, x + tf.cast(tf.equal(x, 0), dtype=float)))
vector_features = tf.stack([r, t, p], axis=1)
return [scalar_features, vector_features]
def get_field_of_view(focal_length, sensor_length, dtype=tf.float32):
"""
Get the field of view based on focal length and sensor length.
Inputs must be same size.
Args:
focal_length: focal length of camera.
sensor_length: length of sensor in the appropriate dimension.
Returns:
field of view in radians.
"""
with tf.name_scope('field_of_view'):
focal_length = tf.convert_to_tensor(focal_length, dtype=dtype)
sensor_length = tf.convert_to_tensor(sensor_length, dtype=dtype)
if sensor_length.shape.ndims == focal_length.shape.ndims + 1:
focal_length = tf.expand_dims(focal_length, axis=-1)
fov = 2 * tf.atan(sensor_length / (2*focal_length))
return fov
def create_src_field(opt, d):
zz = tf.cast(d, tf.float32)
x = tf.constant((np.arange(opt.M) - (opt.M - 1) / 2) * opt.dx,
shape=[opt.M, 1],
dtype=tf.float32)
y = tf.constant((np.arange(opt.N) - (opt.N - 1) / 2) * opt.dy,
shape=[1, opt.N],
dtype=tf.float32)
r2 = tf.matmul(tf.square(x), tf.ones_like(y)) + tf.matmul(
tf.ones_like(x), tf.square(y))
Rz = zz * (1 + (opt.zr / zz)**2)
gouy = tf.atan(zz / opt.zr)
wz = opt.w0 * tf.sqrt(1 + (zz / opt.zr)**2)
k = 2 * np.pi / opt.wlength
amp_term = tf.exp(-r2 / (wz**2))
phase_arg = -(k * zz + k * r2 / (2 * Rz) - gouy)
Gz = tf.complex(amp_term * tf.cos(phase_arg), amp_term * tf.sin(phase_arg))
return Gz
def body(i, feat_scores, feat_x, feat_y, feat_w, feat_h, feat_theta):
"""Body: update feature labels, scores and bboxes.
Follow the original SSD paper for that purpose:
- assign values when jaccard > 0.5;
- only update if beat the score of other bboxes.
"""
# Jaccard score.
bbox = cord[i]
angle = tf.atan(
(bbox[3, 1] - bbox[2, 1]) / tf.abs(bbox[2, 0] - bbox[3, 0]))
height = tf.sqrt(
tf.square(bbox[3, 1] - bbox[0, 1]) +
tf.square(bbox[3, 0] - bbox[0, 0]))
rotate_matrix = tf.stack([-tf.sin(angle), tf.cos(angle)])
a_cord = tf.transpose(tf.stack([bbox[0, 0] - xref, bbox[0, 1] - yref]),
perm=(1, 2, 0))
d_cord = tf.transpose(tf.stack([bbox[3, 0] - xref, bbox[3, 1] - yref]),
perm=(1, 2, 0))
y_a = tf.reduce_sum(a_cord * rotate_matrix, axis=-1) + yref
y_d = tf.reduce_sum(a_cord * rotate_matrix, axis=-1) + yref
ys = (y_a + y_d) / 2
mask = positive_anchors(bbox)
score = height / href
mask = tf.logical_and(mask, tf.greater(score, feat_scores))
imask = tf.cast(mask, tf.int64)
fmask = tf.cast(mask, dtype)
feat_scores = tf.where(mask,
tf.ones_like(feat_scores, dtype=dtype) * score,
feat_scores)
feat_theta = tf.where(mask,
tf.ones_like(feat_scores, dtype=dtype) * angle,
feat_theta)
feat_h = tf.where(
mask,
tf.ones_like(feat_scores, dtype=dtype) * tf.log(height / gamma),
feat_h)
feat_y = tf.where(mask, ys, feat_y)
return [i + 1, feat_scores, feat_x, feat_y, feat_w, feat_h, feat_theta]
def Phase(x):
'''
Compute magnitude of input if input is HDA object.
- If input is real-valued, pass through
'''
if type(x) is TFHDA:
# phase = tf.angle(c)
# phase = tf.atan2(x.i, x.r)
# x.r = tf.maximum(abs(x.r), 1e-15)
phase = tf.div(x.i, tf.maximum(abs(x.r), 1e-15))
# phase = tf.div(x.i, abs(x.r)+1e-15)
phase = tf.atan(phase)
# phase = x.i
# phase = tf.concat([x.r, x.i], axis=1) # shape(batch, 4)
else:
phase = 0
return phase
def _atan2(y, x):
""" My implementation of atan2 in tensorflow. Returns in -pi .. pi."""
tan = tf.atan(y / (x + 1e-8)) # this returns in -pi/2 .. pi/2
one_map = tf.ones_like(tan)
# correct quadrant error
correction = tf.where(tf.less(x + 1e-8, 0.0),
3.141592653589793 * one_map, 0.0 * one_map)
tan_c = tan + correction # this returns in -pi/2 .. 3pi/2
# bring to positive values
correction = tf.where(tf.less(tan_c, 0.0),
2 * 3.141592653589793 * one_map, 0.0 * one_map)
tan_zero_2pi = tan_c + correction # this returns in 0 .. 2pi
# make symmetric
correction = tf.where(tf.greater(tan_zero_2pi, 3.141592653589793),
-2 * 3.141592653589793 * one_map, 0.0 * one_map)
tan_final = tan_zero_2pi + correction # this returns in -pi .. pi
return tan_final
def RNN(x):
batch_x = tf.reshape(x, [BATCH_SIZE, N_STEPS, N_INPUT])
# Unstack to get a list of 'n_steps' tensors of shape (batch_size, n_input)
x_unstack = tf.unstack(batch_x, N_STEPS, 1)
# Define a lstm cell with tensorflow
lstm_cell = rnn.BasicLSTMCell(N_HIDDEN, forget_bias=1.0)
# Get lstm cell output
outputs, states = rnn.static_rnn(lstm_cell, x_unstack, dtype=tf.float32)
W_fc1_opt = weight_variable('lstm_weights_1', [N_HIDDEN, 1],
float(N_HIDDEN))
b_fc1_opt = bias_variable('lstm_bias_1', [1])
outputs = tf.matmul(outputs[-1], W_fc1_opt) + b_fc1_opt
# radiants in the range of [-pi/2, pi/2] * 2 to get 360 range
y_opt = tf.multiply(tf.atan(outputs), 2)
return y_opt
def main():
with tf.Session() as sess:
#tf.assign(x,y)
print(sess.run(x))
print(sess.run(y))
print(sess.run(tf.add(x, y)))
print(sess.run(tf.subtract(x, y))) #减法
print(sess.run(tf.multiply(x, y))) #乘法
print(sess.run(tf.divide(x, y))) #除法
print(sess.run(tf.mod(x, y))) #取模,x/y的余数
print(sess.run(tf.abs(tf.constant(-4)))) #求绝对值
print(sess.run(tf.negative(y))) #取负
print(sess.run(tf.sign(3))) #返回输入的符号，负数则为-1,0为0,正数为1
print(sess.run(tf.sign(0)))
print(sess.run(tf.sign(-3)))
#print(sess.run(tf.inv(y))) #取反
print(sess.run(tf.square(x))) #平方
print(sess.run(tf.round([0.9, 2.5, 2.3, 1.5,
-4.5]))) #舍入最接近的整数 [1.0,2.0,2.0,2.0,-4.0]
print(sess.run(tf.sqrt(0.04))) #平方根,float
a = [[2, 2], [3, 3]]
b = [[8, 16], [2, 3]]
print(sess.run(tf.pow(a, b))) #幂次方运算[[2的8次方，2的16次方],[3的2次方，3的3次方]]
print(sess.run(tf.exp(2.0))) #e的次方 float
print(sess.run(tf.log(10.0))) # float 计算log，一个输入计算e的ln,两次输入以第二次输入为底
#print(sess.run(tf.log(3.0,9.0)))
print(sess.run(tf.maximum(x, y))) #最大值
print(sess.run(tf.minimum(x, y))) #最小值
print(sess.run(tf.cos(0.0))) #三角函数
print(sess.run(tf.sin(0.0)))
print(sess.run(tf.tan(45.0)))
print(sess.run(tf.atan(1.0))) #ctan三角函数
print(sess.run(tf.cond(tf.less(x, y), f1, f2))) #满足条件则执行f1，否则执行f2
#print(sess.run(tf()))
pass
def inference_nvidianet(images):
with tf.variable_scope('conv1'):
conv1 = common.activation(common.conv(images, 24, ksize=5, stride=2,
padding='VALID'))
with tf.variable_scope('conv2'):
conv2 = common.activation(common.conv(conv1, 36, ksize=5, stride=2,
padding='VALID'))
with tf.variable_scope('conv3'):
conv3 = common.activation(common.conv(conv2, 48, ksize=5, stride=2,
padding='VALID'))
with tf.variable_scope('conv4'):
conv4 = common.activation(common.conv(conv3, 64, ksize=3, stride=1,
padding='VALID'))
with tf.variable_scope('conv5'):
conv5 = common.activation(common.conv(conv4, 64, ksize=3, stride=1,
padding='VALID'))
with tf.variable_scope('conv6'):
conv6 = common.activation(common.conv(conv5, 64, ksize=3, stride=1,
padding='VALID'))
with tf.variable_scope('conv7'):
conv7 = common.activation(common.conv(conv6, 64, ksize=3, stride=1,
padding='VALID'))
conv7_flat = common.flatten(conv7)
with tf.variable_scope('fc1'):
fc1 = common.dropout(common.activation(common.fc(conv7_flat, 512)),
0.5)
with tf.variable_scope('fc2'):
fc2 = common.dropout(common.activation(common.fc(fc1, 128)),
0.625)
with tf.variable_scope('fc3'):
fc3 = common.dropout(common.activation(common.fc(fc2, 32)),
0.75)
with tf.variable_scope('fc4'):
fc4 = common.dropout(common.activation(common.fc(fc3, 8)),
0.875)
with tf.variable_scope('fc5'):
fc5 = tf.atan(common.fc(fc4, 1))
return fc5
def smooth_l1_loss_atan(targets, preds, anchor_state, sigma=3.0, weight=None):
sigma_squared = sigma**2
indices = tf.reshape(tf.where(tf.equal(anchor_state, 1)), [
-1,
])
preds = tf.gather(preds, indices)
targets = tf.gather(targets, indices)
# compute smooth L1 loss
# f(x) = 0.5 * (sigma * x)^2 if |x| < 1 / sigma / sigma
# |x| - 0.5 / sigma / sigma otherwise
regression_diff = preds - targets
regression_diff = tf.abs(regression_diff)
regression_diff = tf.reshape(regression_diff, [-1, 5])
dx, dy, dw, dh, dtheta = tf.unstack(regression_diff, axis=-1)
dtheta = tf.atan(dtheta)
regression_diff = tf.transpose(tf.stack([dx, dy, dw, dh, dtheta]))
regression_loss = tf.where(
tf.less(regression_diff, 1.0 / sigma_squared),
0.5 * sigma_squared * tf.pow(regression_diff, 2),
regression_diff - 0.5 / sigma_squared)
if weight is not None:
regression_loss = tf.reduce_sum(regression_loss, axis=-1)
weight = tf.gather(weight, indices)
regression_loss *= weight
normalizer = tf.stop_gradient(tf.where(tf.equal(anchor_state, 1)))
normalizer = tf.cast(tf.shape(normalizer)[0], tf.float32)
normalizer = tf.maximum(1.0, normalizer)
# normalizer = tf.stop_gradient(tf.cast(tf.equal(anchor_state, 1), tf.float32))
# normalizer = tf.maximum(tf.reduce_sum(normalizer), 1)
return tf.reduce_sum(regression_loss) / normalizer
def Dense(X, size, init, name, activation):
w = get_weights(shape=size, name='W_' + name, init=init)
b = get_weights(shape=[size[-1]], name='b_' + name, init=init)
dense = tf.matmul(X, w) + b
print(name, size, size[-1])
## Applying activation
if activation == 'relu':
h_fc = tf.nn.relu(dense)
elif activation == 'sigmoid':
h_fc = tf.nn.sigmoid(dense)
elif activation == 'leaky_relu':
h_fc = tf.nn.leaky_relu(dense)
elif activation == 'tanh':
h_fc = tf.nn.tanh(dense)
elif activation == 'atan':
h_fc = tf.atan(dense)
# if dropout >= 0.0 and dropout < 1.0:
# return tf.nn.dropout(h_fc, keep_prob=dropout)
return h_fc
def mlp_rest_2048(self, h):
# FCL 3
W_fc3 = weight_variable([1024, 256])
b_fc3 = bias_variable([256])
h_fc3 = tf.nn.relu(tf.matmul(h, W_fc3) + b_fc3)
h_fc3_drop = tf.nn.dropout(h_fc3, self.keep_prob)
# FCL 4
W_fc4 = weight_variable([256, 128])
b_fc4 = bias_variable([128])
h_fc4 = tf.nn.relu(tf.matmul(h_fc3_drop, W_fc4) + b_fc4)
h_fc4_drop = tf.nn.dropout(h_fc4, self.keep_prob)
# Output
W_fc5 = weight_variable([128, 16])
b_fc5 = bias_variable([16])
h_fc5 = tf.nn.relu(tf.matmul(h_fc4_drop, W_fc5) + b_fc5)
h_fc5_drop = tf.nn.dropout(h_fc5, self.keep_prob)
W_fc6 = weight_variable([16, 2])
b_fc6 = bias_variable([2])
return tf.multiply(tf.atan(tf.matmul(h_fc5_drop, W_fc6) + b_fc6), 2)
def merge_mlp(self, h1, h2):
# FCL 1
W_fc1 = weight_variable([1152 * 2, 1164])
b_fc1 = bias_variable_const([1164])
h_flat1 = tf.reshape(h1, [-1, 1152])
h_flat2 = tf.reshape(h2, [-1, 1152])
print h_flat1
print h_flat2
h_flat = tf.reshape(tf.stack((h_flat1, h_flat2), axis=2), [-1, 1152 * 2])
print h_flat
h_fc1 = tf.nn.relu(tf.matmul(h_flat, W_fc1) + b_fc1)
h_fc1_drop = tf.nn.dropout(h_fc1, self.keep_prob)
# FCL 2
W_fc2 = weight_variable([1164, 100])
b_fc2 = bias_variable([100])
h_fc2 = tf.nn.relu(tf.matmul(h_fc1_drop, W_fc2) + b_fc2)
h_fc2_drop = tf.nn.dropout(h_fc2, self.keep_prob)
# FCL 3
W_fc3 = weight_variable([100, 50])
b_fc3 = bias_variable([50])
h_fc3 = tf.nn.relu(tf.matmul(h_fc2_drop, W_fc3) + b_fc3)
h_fc3_drop = tf.nn.dropout(h_fc3, self.keep_prob)
# FCL 4
W_fc4 = weight_variable([50, 10])
b_fc4 = bias_variable([10])
h_fc4 = tf.nn.relu(tf.matmul(h_fc3_drop, W_fc4) + b_fc4)
h_fc4_drop = tf.nn.dropout(h_fc4, self.keep_prob)
# Output
W_fc5 = weight_variable([10, 2])
b_fc5 = bias_variable([2])
return tf.multiply(tf.atan(tf.matmul(h_fc4_drop, W_fc5) + b_fc5), 2)
def autopilot(x, weights, biases, dropout):
# Layer 1 - 66*200*3 to 31*98*24
conv1 = conv2d(x, weights['wc1'], biases['bc1'], 2)
# Layer 2 - 31*98*24 to 14*47*36
conv2 = conv2d(conv1, weights['wc2'], biases['bc2'], 2)
# Layer 3 - 14*47*36 to 5*22*48
conv3 = conv2d(conv2, weights['wc3'], biases['bc3'], 2)
# Layer 4 - 5*22*48 to 3*20*64
conv4 = conv2d(conv3, weights['wc4'], biases['bc4'])
# Layer 5 - 3*20*64 to 1*18*64
conv5 = conv2d(conv4, weights['wc5'], biases['bc5'])
# Flatten feature map
flat1 = flatten(conv5)
# Fully connected layer - 1*18*64 to 100
fc1 = tf.add(tf.matmul(flat1, weights['wd1']), biases['bd1'])
fc1 = tf.nn.relu(fc1)
# Fully connected layer - From 100 to 50
fc2 = tf.add(tf.matmul(fc1, weights['wd2']), biases['bd2'])
fc2 = tf.nn.relu(fc2)
#fc2 = tf.nn.dropout(fc2, dropout)
# Fully connected layer - From 50 to 10
fc3 = tf.add(tf.matmul(fc2, weights['wd3']), biases['bd3'])
fc3 = tf.nn.relu(fc3)
# Fully connected layer - Output Layer - class prediction - 10 to 1
out = tf.multiply(
tf.atan(tf.add(tf.matmul(fc3, weights['out']), biases['out'])), 2)
return out
def CreateGraph(self, x, activationFunction):
y = tf.concat(x, axis=1)
for i in range(len(self.layers) - 2):
w = self.weights[i]
b = self.biases[i]
if activationFunction == ActivationFunction.Tanh:
y = tf.nn.tanh(tf.add(tf.matmul(y, w), b))
elif activationFunction == ActivationFunction.Sigmoid:
y = tf.nn.sigmoid(tf.add(tf.matmul(y, w), b))
elif activationFunction == ActivationFunction.Sin:
y = tf.sin(tf.add(tf.matmul(y, w), b))
elif activationFunction == ActivationFunction.Cos:
y = tf.cos(tf.add(tf.matmul(y, w), b))
elif activationFunction == ActivationFunction.Atan:
y = tf.atan(tf.add(tf.matmul(y, w), b))
w = self.weights[-1]
b = self.biases[-1]
return tf.add(tf.matmul(y, w), b)
def test_Atan(self):
t = tf.atan(self.random(4, 3))
self.check(t)
def atan(x):
return tf.atan(x) * 1
return x
def _log_cdf(self, x):
return self._extend_support_with_default_value(
x,
lambda x: np.log(2 / np.pi) + tf.math.log(tf.atan(self._z(x))),
default_value=-np.inf)
def bbox_ciou(boxes1, boxes2):
'''
ciou = iou - p2/c2 - av
:param boxes1: (8, 13, 13, 3, 4) pred_xywh
:param boxes2: (8, 13, 13, 3, 4) label_xywh
:return:
'''
boxes1_x0y0x1y1 = tf.concat([
boxes1[..., :2] - boxes1[..., 2:] * 0.5,
boxes1[..., :2] + boxes1[..., 2:] * 0.5
],
axis=-1)
boxes2_x0y0x1y1 = tf.concat([
boxes2[..., :2] - boxes2[..., 2:] * 0.5,
boxes2[..., :2] + boxes2[..., 2:] * 0.5
],
axis=-1)
boxes1_x0y0x1y1 = tf.concat([
tf.minimum(boxes1_x0y0x1y1[..., :2], boxes1_x0y0x1y1[..., 2:]),
tf.maximum(boxes1_x0y0x1y1[..., :2], boxes1_x0y0x1y1[..., 2:])
],
axis=-1)
boxes2_x0y0x1y1 = tf.concat([
tf.minimum(boxes2_x0y0x1y1[..., :2], boxes2_x0y0x1y1[..., 2:]),
tf.maximum(boxes2_x0y0x1y1[..., :2], boxes2_x0y0x1y1[..., 2:])
],
axis=-1)
# area
boxes1_area = (boxes1_x0y0x1y1[..., 2] - boxes1_x0y0x1y1[..., 0]) * (
boxes1_x0y0x1y1[..., 3] - boxes1_x0y0x1y1[..., 1])
boxes2_area = (boxes2_x0y0x1y1[..., 2] - boxes2_x0y0x1y1[..., 0]) * (
boxes2_x0y0x1y1[..., 3] - boxes2_x0y0x1y1[..., 1])
# top-left and bottom-right coord, shape: (8, 13, 13, 3, 2)
left_up = tf.maximum(boxes1_x0y0x1y1[..., :2], boxes2_x0y0x1y1[..., :2])
right_down = tf.minimum(boxes1_x0y0x1y1[..., 2:], boxes2_x0y0x1y1[..., 2:])
# intersection area and iou
inter_section = tf.maximum(right_down - left_up, 0.0)
inter_area = inter_section[..., 0] * inter_section[..., 1]
union_area = boxes1_area + boxes2_area - inter_area
iou = inter_area / (union_area + 1e-9)
# top-left and bottom-right coord of the enclosing rectangle, shape: (8, 13, 13, 3, 2)
enclose_left_up = tf.minimum(boxes1_x0y0x1y1[..., :2],
boxes2_x0y0x1y1[..., :2])
enclose_right_down = tf.maximum(boxes1_x0y0x1y1[..., 2:],
boxes2_x0y0x1y1[..., 2:])
# diagnal ** 2
enclose_wh = enclose_right_down - enclose_left_up
enclose_c2 = K.pow(enclose_wh[..., 0], 2) + K.pow(enclose_wh[..., 1], 2)
# center distances between two rectangles
p2 = K.pow(boxes1[..., 0] - boxes2[..., 0], 2) + K.pow(
boxes1[..., 1] - boxes2[..., 1], 2)
# add av
atan1 = tf.atan(boxes1[..., 2] / (boxes1[..., 3] + 1e-9))
atan2 = tf.atan(boxes2[..., 2] / (boxes2[..., 3] + 1e-9))
v = 4.0 * K.pow(atan1 - atan2, 2) / (math.pi**2)
a = v / (1 - iou + v)
ciou = iou - 1.0 * p2 / enclose_c2 - 1.0 * a * v
return ciou
def compute_ciou(target, output):
'''
takes in a list of bounding boxes
but can work for a single bounding box too
all the boundary cases such as bounding boxes of size 0 are handled.
'''
target = (target) * (target != 0)
output = (output) * (target != 0)
x1g, y1g, x2g, y2g = tf.split(value=target, num_or_size_splits=4, axis=1)
x1, y1, x2, y2 = tf.split(value=output, num_or_size_splits=4, axis=1)
w_pred = x2 - x1
h_pred = y2 - y1
w_gt = x2g - x1g
h_gt = y2g - y1g
x_center = (x2 + x1) / 2
y_center = (y2 + y1) / 2
x_center_g = (x1g + x2g) / 2
y_center_g = (y1g + y2g) / 2
xc1 = tf.minimum(x1, x1g)
yc1 = tf.minimum(y1, y1g)
xc2 = tf.maximum(x2, x2g)
yc2 = tf.maximum(y2, y2g)
###iou term###
xA = tf.maximum(x1g, x1)
yA = tf.maximum(y1g, y1)
xB = tf.minimum(x2g, x2)
yB = tf.minimum(y2g, y2)
interArea = tf.maximum(0.0, (xB - xA + 1)) * tf.maximum(0.0, yB - yA + 1)
boxAArea = (x2g - x1g + 1) * (y2g - y1g + 1)
boxBArea = (x2 - x1 + 1) * (y2 - y1 + 1)
iouk = interArea / (boxAArea + boxBArea - interArea + 1e-10)
###
###distance term###
c = ((xc2 - xc1)**2) + ((yc2 - yc1)**2) + 1e-7
d = ((x_center - x_center_g)**2) + ((y_center - y_center_g)**2)
u = d / c
###
###aspect-ratio term###
arctan = tf.atan(w_gt / (h_gt + 1e-10)) - tf.atan(w_pred /
(h_pred + 1e-10))
v = (4 / (math.pi**2)) * tf.pow(
(tf.atan(w_gt / (h_gt + 1e-10)) - tf.atan(w_pred /
(h_pred + 1e-10))), 2)
S = 1 - iouk
alpha = v / (S + v + 1e-10)
w_temp = 2 * w_pred
ar = (8 / (math.pi**2)) * arctan * ((w_pred - w_temp) * h_pred)
###
###calculate diou###
#diouk = iouk - u
#diouk = (1 - diouk)
###
###calculate ciou###
ciouk = iouk - (u + alpha * ar)
ciouk = (1 - ciouk)
###
return ciouk
#FCL 2 W_fc2 = weight_variable([1164, 100]) b_fc2 = bias_variable([100]) h_fc2 = tf.nn.relu(tf.matmul(h_fc1_drop, W_fc2) + b_fc2) h_fc2_drop = tf.nn.dropout(h_fc2, keep_prob) #FCL 3 W_fc3 = weight_variable([100, 50]) b_fc3 = bias_variable([50]) h_fc3 = tf.nn.relu(tf.matmul(h_fc2_drop, W_fc3) + b_fc3) h_fc3_drop = tf.nn.dropout(h_fc3, keep_prob) #FCL 3 W_fc4 = weight_variable([50, 10]) b_fc4 = bias_variable([10]) h_fc4 = tf.nn.relu(tf.matmul(h_fc3_drop, W_fc4) + b_fc4) h_fc4_drop = tf.nn.dropout(h_fc4, keep_prob) #Output W_fc5 = weight_variable([10, 1]) b_fc5 = bias_variable([1]) y = tf.mul(tf.atan(tf.matmul(h_fc4_drop, W_fc5) + b_fc5), 2) #scale the atan output
def __init__(self, drop_out=False, relu=True, is_training=True):
self.x = tf.placeholder(tf.float32, shape=[None, 66, 200, 3])
self.y_ = tf.placeholder(tf.float32, shape=[None, 1])
self.x_image = self.x
self.keep_prob = tf.placeholder(tf.float32)
# first convolutional layer
self.W_conv1 = weight_variable([5, 5, 3, 24])
self.b_conv1 = bias_variable([24])
self.h_conv1 = conv2d(self.x_image, binarize(self.W_conv1),
2) + self.b_conv1
if relu:
self.h_conv1 = tf.nn.relu(self.h_conv1)
self.batch_norm1 = tf.contrib.layers.batch_norm(
self.h_conv1, is_training=is_training, trainable=True)
self.out_feature1 = HardTanh(self.batch_norm1, is_training)
# second convolutional layer
self.W_conv2 = weight_variable([5, 5, 24, 36])
self.b_conv2 = bias_variable([36])
self.h_conv2 = conv2d(binarize(self.out_feature1),
binarize(self.W_conv2), 2) + self.b_conv2
if relu:
self.h_conv2 = tf.nn.relu(self.h_conv2)
self.batch_norm2 = tf.contrib.layers.batch_norm(
self.h_conv2, is_training=is_training, trainable=True)
self.out_feature2 = HardTanh(self.batch_norm2, is_training)
# third convolutional layer
self.W_conv3 = weight_variable([5, 5, 36, 48])
self.b_conv3 = bias_variable([48])
self.h_conv3 = conv2d(binarize(self.out_feature2),
binarize(self.W_conv3), 2) + self.b_conv3
if relu:
self.h_conv3 = tf.nn.relu(self.h_conv3)
self.batch_norm3 = tf.contrib.layers.batch_norm(
self.h_conv3, is_training=is_training, trainable=True)
self.out_feature3 = HardTanh(self.batch_norm3, is_training)
# fourth convolutional layer
self.W_conv4 = weight_variable([3, 3, 48, 64])
self.b_conv4 = bias_variable([64])
self.h_conv4 = conv2d(binarize(self.out_feature3),
binarize(self.W_conv4), 1) + self.b_conv4
if relu:
self.h_conv4 = tf.nn.relu(self.h_conv4)
self.batch_norm4 = tf.contrib.layers.batch_norm(
self.h_conv4, is_training=is_training, trainable=True)
self.out_feature4 = HardTanh(self.batch_norm4, is_training)
# fifth convolutional layer
self.W_conv5 = weight_variable([3, 3, 64, 64])
self.b_conv5 = bias_variable([64])
self.h_conv5 = conv2d(binarize(self.out_feature4),
binarize(self.W_conv5), 1) + self.b_conv5
if relu:
self.h_conv5 = tf.nn.relu(self.h_conv5)
self.batch_norm5 = tf.contrib.layers.batch_norm(
self.h_conv5, is_training=is_training, trainable=True)
self.out_feature5 = HardTanh(self.batch_norm5, is_training)
# FCL 1
self.W_fc1 = weight_variable([1152, 1164])
self.b_fc1 = bias_variable([1164])
self.out_feature5_flat = tf.reshape(binarize(self.out_feature5),
[-1, 1152])
self.h_fc1 = tf.matmul(self.out_feature5_flat, binarize(
self.W_fc1)) + self.b_fc1
if relu:
self.h_fc1 = tf.nn.relu(self.h_fc1)
self.batch_norm6 = tf.contrib.layers.batch_norm(
self.h_fc1, is_training=is_training, trainable=True)
self.out_feature6 = HardTanh(self.batch_norm6, is_training)
if drop_out & is_training:
self.out_feature6 = tf.nn.dropout(self.out_feature6,
self.keep_prob)
# FCL 2
self.W_fc2 = weight_variable([1164, 100])
self.b_fc2 = bias_variable([100])
self.h_fc2 = tf.matmul(binarize(self.out_feature6), binarize(
self.W_fc2)) + self.b_fc2
if relu:
self.h_fc2 = tf.nn.relu(self.h_fc2)
self.batch_norm7 = tf.contrib.layers.batch_norm(
self.h_fc2, is_training=is_training, trainable=True)
self.out_feature7 = HardTanh(self.batch_norm7, is_training)
if drop_out & is_training:
self.out_feature7 = tf.nn.dropout(self.out_feature7,
self.keep_prob)
# FCL 3
self.W_fc3 = weight_variable([100, 50])
self.b_fc3 = bias_variable([50])
self.h_fc3 = tf.matmul(binarize(self.out_feature7), binarize(
self.W_fc3)) + self.b_fc3
if relu:
self.h_fc3 = tf.nn.relu(self.h_fc3)
self.batch_norm8 = tf.contrib.layers.batch_norm(
self.h_fc3, is_training=is_training, trainable=True)
self.out_feature8 = HardTanh(self.batch_norm8, is_training)
if drop_out & is_training:
self.out_feature8 = tf.nn.dropout(self.out_feature8,
self.keep_prob)
# FCL 3
self.W_fc4 = weight_variable([50, 10])
self.b_fc4 = bias_variable([10])
self.h_fc4 = tf.matmul(binarize(self.out_feature8), binarize(
self.W_fc4)) + self.b_fc4
if relu:
self.h_fc4 = tf.nn.relu(self.h_fc4)
self.batch_norm9 = tf.contrib.layers.batch_norm(
self.h_fc4, is_training=is_training, trainable=True)
self.out_feature9 = HardTanh(self.batch_norm9, is_training)
if drop_out & is_training:
self.out_feature9 = tf.nn.dropout(self.out_feature9,
self.keep_prob)
# Output
self.W_fc5 = weight_variable([10, 1])
self.b_fc5 = bias_variable([1])
# scale the atan output
self.y = tf.multiply(
tf.atan(tf.matmul(self.out_feature9, self.W_fc5) + self.b_fc5), 2)
def __init__(self):
self.image_input = tf.placeholder(tf.float32, shape=[None, 66, 200, 3])
# use for training loss computation
self.y_ = tf.placeholder(tf.float32, shape=[None, 1])
self.keep_prob = tf.placeholder(tf.float32)
# model parameters
# self.model_params = []
# first convolutional layer
W_conv1 = _weight_variable([5, 5, 3, 24])
b_conv1 = _bias_variable([24])
h_conv1 = tf.nn.relu(_conv2d(self.image_input, W_conv1, 2) + b_conv1)
# second convolutional layer
W_conv2 = _weight_variable([5, 5, 24, 36])
b_conv2 = _bias_variable([36])
h_conv2 = tf.nn.relu(_conv2d(h_conv1, W_conv2, 2) + b_conv2)
# third convolutional layer
W_conv3 = _weight_variable([5, 5, 36, 48])
b_conv3 = _bias_variable([48])
h_conv3 = tf.nn.relu(_conv2d(h_conv2, W_conv3, 2) + b_conv3)
# fourth convolutional layer
W_conv4 = _weight_variable([3, 3, 48, 64])
b_conv4 = _bias_variable([64])
h_conv4 = tf.nn.relu(_conv2d(h_conv3, W_conv4, 1) + b_conv4)
# fifth convolutional layer
W_conv5 = _weight_variable([3, 3, 64, 64])
b_conv5 = _bias_variable([64])
h_conv5 = tf.nn.relu(_conv2d(h_conv4, W_conv5, 1) + b_conv5)
# FCL 1
W_fc1 = _weight_variable([1152, 1164])
b_fc1 = _bias_variable([1164])
h_conv5_flat = tf.reshape(h_conv5, [-1, 1152])
h_fc1 = tf.nn.relu(tf.matmul(h_conv5_flat, W_fc1) + b_fc1)
h_fc1_drop = tf.nn.dropout(h_fc1, self.keep_prob)
# FCL 2
W_fc2 = _weight_variable([1164, 100])
b_fc2 = _bias_variable([100])
h_fc2 = tf.nn.relu(tf.matmul(h_fc1_drop, W_fc2) + b_fc2)
h_fc2_drop = tf.nn.dropout(h_fc2, self.keep_prob)
# FCL 3
W_fc3 = _weight_variable([100, 50])
b_fc3 = _bias_variable([50])
h_fc3 = tf.nn.relu(tf.matmul(h_fc2_drop, W_fc3) + b_fc3)
h_fc3_drop = tf.nn.dropout(h_fc3, self.keep_prob)
# FCL 3
W_fc4 = _weight_variable([50, 10])
b_fc4 = _bias_variable([10])
h_fc4 = tf.nn.relu(tf.matmul(h_fc3_drop, W_fc4) + b_fc4)
h_fc4_drop = tf.nn.dropout(h_fc4, self.keep_prob)
# Output
W_fc5 = _weight_variable([10, 1])
b_fc5 = _bias_variable([1])
self.steering = tf.multiply(
tf.atan(tf.matmul(h_fc4_drop, W_fc5) + b_fc5),
2) # scale the atan output
def _log_cdf(self, x): return tf.log1p(2 / np.pi * tf.atan(self._z(x))) - np.log(2)
def __init__(self,
params,
restore=None,
session=None,
use_softmax=False,
image_size=28,
image_channel=1,
activation='relu',
activation_param=0.3,
l2_reg=0.0,
dropout_rate=0.0,
flatten=True,
out_dim=10):
global Sequential, Dense, Dropout, Activation, Flatten, Lambda, Conv2D, MaxPooling2D, LeakyReLU, regularizers, K
if 'Sequential' not in globals():
print('importing Keras from tensorflow...')
from tensorflow.keras.models import Sequential
from tensorflow.keras.layers import InputLayer, Dense, Dropout, Activation, Flatten, Lambda
from tensorflow.keras.layers import Conv2D, MaxPooling2D
from tensorflow.keras.layers import LeakyReLU
from tensorflow.keras.models import load_model
from tensorflow.keras import regularizers
from tensorflow.keras import backend as K
self.image_size = image_size
self.num_channels = image_channel
self.num_labels = out_dim
model = Sequential()
if flatten:
model.add(
Flatten(input_shape=(image_size, image_size, image_channel)))
first = True
# list of all hidden units weights
self.U = []
n = 0
for param in params:
n += 1
# add each dense layer, and save a reference to list U
if first:
self.U.append(
Dense(param,
input_shape=(image_size, ),
kernel_initializer='he_uniform',
kernel_regularizer=regularizers.l2(l2_reg)))
first = False
else:
self.U.append(
Dense(param,
kernel_initializer='he_uniform',
kernel_regularizer=regularizers.l2(l2_reg)))
model.add(self.U[-1])
# ReLU activation
# model.add(Activation(activation))
if activation == "arctan":
model.add(
Lambda(lambda x: tf.atan(x),
name=activation + "_" + str(n)))
elif activation == "leaky":
print("Leaky ReLU slope: {:.3f}".format(activation_param))
model.add(
LeakyReLU(alpha=activation_param,
name=activation + "_" + str(n)))
else:
model.add(
Activation(activation, name=activation + "_" + str(n)))
if dropout_rate > 0.0:
model.add(Dropout(dropout_rate))
self.W = Dense(out_dim,
kernel_initializer='he_uniform',
kernel_regularizer=regularizers.l2(l2_reg))
model.add(self.W)
# output log probability, used for black-box attack
if use_softmax:
model.add(Activation('softmax'))
if restore:
model.load_weights(restore)
layer_outputs = []
# save the output of intermediate layers
for layer in model.layers:
if isinstance(layer, Conv2D) or isinstance(layer, Dense):
layer_outputs.append(
K.function([model.layers[0].input], [layer.output]))
# a tensor to get gradients
self.gradients = []
for i in range(model.output.shape[1]):
output_tensor = model.output[:, i]
self.gradients.append(K.gradients(output_tensor, model.input)[0])
self.layer_outputs = layer_outputs
self.model = model
model.summary()
def _scharr_edges(cls, image, magnitude):
""" Returns a tensor holding modified Scharr edge maps.
Parameters
----------
image: tensor
Image tensor with shape [batch_size, h, w, d] and type float32. The image(s) must be
2x2 or larger.
magnitude: bool
Boolean to determine if the edge magnitude or edge direction is returned
Returns
-------
tensor
Tensor holding edge maps for each channel. Returns a tensor with shape `[batch_size, h,
w, d, 2]` where the last two dimensions hold `[[dy[0], dx[0]], [dy[1], dx[1]], ...,
[dy[d-1], dx[d-1]]]` calculated using the Scharr filter.
"""
# Define vertical and horizontal Scharr filters.
static_image_shape = image.get_shape()
image_shape = K.shape(image)
# 5x5 modified Scharr kernel ( reshape to (5,5,1,2) )
matrix = np.array([[[[0.00070, 0.00070]], [[0.00520, 0.00370]],
[[0.03700, 0.00000]], [[0.00520, -0.0037]],
[[0.00070, -0.0007]]],
[[[0.00370, 0.00520]], [[0.11870, 0.11870]],
[[0.25890, 0.00000]], [[0.11870, -0.1187]],
[[0.00370, -0.0052]]],
[[[0.00000, 0.03700]], [[0.00000, 0.25890]],
[[0.00000, 0.00000]], [[0.00000, -0.2589]],
[[0.00000, -0.0370]]],
[[[-0.0037, 0.00520]], [[-0.1187, 0.11870]],
[[-0.2589, 0.00000]], [[-0.1187, -0.1187]],
[[-0.0037, -0.0052]]],
[[[-0.0007, 0.00070]], [[-0.0052, 0.00370]],
[[-0.0370, 0.00000]], [[-0.0052, -0.0037]],
[[-0.0007, -0.0007]]]])
num_kernels = [2]
kernels = K.constant(matrix, dtype='float32')
kernels = K.tile(kernels, [1, 1, image_shape[-1], 1])
# Use depth-wise convolution to calculate edge maps per channel.
# Output tensor has shape [batch_size, h, w, d * num_kernels].
pad_sizes = [[0, 0], [2, 2], [2, 2], [0, 0]]
padded = tf.pad(
image, # pylint:disable=unexpected-keyword-arg,no-value-for-parameter
pad_sizes,
mode='REFLECT')
output = K.depthwise_conv2d(padded, kernels)
if not magnitude: # direction of edges
# Reshape to [batch_size, h, w, d, num_kernels].
shape = K.concatenate([image_shape, num_kernels], axis=0)
output = K.reshape(output, shape=shape)
output.set_shape(static_image_shape.concatenate(num_kernels))
output = tf.atan(
K.squeeze(output[:, :, :, :, 0] / output[:, :, :, :, 1],
axis=None))
# magnitude of edges -- unified x & y edges don't work well with Neural Networks
return output
def _cdf(self, x): return tf.atan(self._z(x)) / np.pi + 0.5
# fully connected layer 2
W_fc2 = weight_variable("fc2", [1152, 100])
b_fc2 = bias_variable([100])
h_fc2 = tf.nn.relu(tf.matmul(h_conv5_flat, W_fc2) + b_fc2)
h_fc2_drop = tf.nn.dropout(h_fc2, keep_prob)
# fully connected layer 3
W_fc3 = weight_variable("fc3", [100, 50])
b_fc3 = bias_variable([50])
h_fc3 = tf.nn.relu(tf.matmul(h_fc2_drop, W_fc3) + b_fc3)
h_fc3_drop = tf.nn.dropout(h_fc3, keep_prob)
# fully connected layer 4
W_fc4 = weight_variable("fc4", [50, 10])
b_fc4 = bias_variable([10])
h_fc4 = tf.nn.relu(tf.matmul(h_fc3_drop, W_fc4) + b_fc4)
h_fc4_drop = tf.nn.dropout(h_fc4, keep_prob)
# output
W_fc5 = weight_variable("fc5", [10, 1])
b_fc5 = bias_variable([1])
y = tf.multiply(tf.atan(tf.matmul(h_fc4_drop, W_fc5) + b_fc5),
2) #scale the atan output
def atan_layer(x):
return tf.multiply(tf.atan(x), 2)
def owent(h, a):
h = tf.abs(h)
term1 = tf.atan(a) / (2 * np.pi)
term2 = tf.exp((-1 / 2) * (tf.multiply(tf.square(h), (tf.square(a) + 1))))
return tf.multiply(term1, term2)
def custom(y):
return tf.atan(y, name='output')
def __init__(self, dropout_prob=0.2, batch_norm=False, whitening=False, is_training=True):
x = tf.placeholder(tf.float32, shape=[None, 66, 200, 3], name='x')
y_ = tf.placeholder(tf.float32, shape=[None, 1])
keep_prob = tf.placeholder(tf.float32, name='keep_prob')
x_image = x
self.W_conv1 = weight_variable([5, 5, 3, 24])
self.b_conv1 = bias_variable([24])
self.h_conv1 = tf.nn.relu(conv2d(x_image, self.W_conv1, 2) + self.b_conv1)
if batch_norm:
self.h_conv1 = tf.contrib.layers.batch_norm(self.h_conv1, is_training=is_training, trainable=True)
self.W_conv2 = weight_variable([5, 5, 24, 36])
self.b_conv2 = bias_variable([36])
self.h_conv2 = tf.nn.relu(conv2d(self.h_conv1, self.W_conv2, 2) + self.b_conv2)
self.W_conv3 = weight_variable([5, 5, 36, 48])
self.b_conv3 = bias_variable([48])
self.h_conv3 = tf.nn.relu(conv2d(self.h_conv2, self.W_conv3, 2) + self.b_conv3)
if batch_norm:
self.h_conv3 = tf.contrib.layers.batch_norm(self.h_conv3, is_training=is_training, trainable=True)
self.W_conv4 = weight_variable([3, 3, 48, 64])
self.b_conv4 = bias_variable([64])
self.h_conv4 = tf.nn.relu(conv2d(self.h_conv3, self.W_conv4, 1) + self.b_conv4)
self.W_conv5 = weight_variable([3, 3, 64, 64])
self.b_conv5 = bias_variable([64])
self.h_conv5 = tf.nn.relu(conv2d(self.h_conv4, self.W_conv5, 1) + self.b_conv5)
if batch_norm:
self.h_conv5 = tf.contrib.layers.batch_norm(self.h_conv5, is_training=is_training, trainable=True)
self.W_fc1 = weight_variable([1152, 1164])
self.b_fc1 = bias_variable([1164])
self.h_conv5_flat = tf.reshape(self.h_conv5, [-1, 1152])
self.h_fc1 = tf.nn.relu(tf.matmul(self.h_conv5_flat, self.W_fc1) + self.b_fc1)
if batch_norm:
self.h_fc1 = tf.contrib.layers.batch_norm(self.h_fc1, is_training=is_training, trainable=True)
self.h_fc1_drop = tf.nn.dropout(self.h_fc1, keep_prob)
self.W_fc2 = weight_variable([1164, 100])
self.b_fc2 = bias_variable([100])
self.h_fc2 = tf.nn.relu(tf.matmul(self.h_fc1_drop, self.W_fc2) + self.b_fc2, name='fc2')
if batch_norm:
self.h_fc2 = tf.contrib.layers.batch_norm(self.h_fc2, is_training=is_training, trainable=True)
self.h_fc2_drop = tf.nn.dropout(self.h_fc2, keep_prob)
self.W_fc3 = weight_variable([100, 50])
self.b_fc3 = bias_variable([50])
self.h_fc3 = tf.nn.relu(tf.matmul(self.h_fc2_drop, self.W_fc3) + self.b_fc3, name='fc3')
if batch_norm:
self.h_fc3 = tf.contrib.layers.batch_norm(self.h_fc3, is_training=is_training, trainable=True)
self.h_fc3_drop = tf.nn.dropout(self.h_fc3, keep_prob)
self.W_fc4 = weight_variable([50, 10])
self.b_fc4 = bias_variable([10])
self.h_fc4 = tf.nn.relu(tf.matmul(self.h_fc3_drop, self.W_fc4) + self.b_fc4, name='fc4')
if batch_norm:
self.h_fc4 = tf.contrib.layers.batch_norm(self.h_fc4, is_training=is_training, trainable=True)
self.h_fc4_drop = tf.nn.dropout(self.h_fc4, keep_prob)
self.W_fc5 = weight_variable([10, 1])
self.b_fc5 = bias_variable([1])
y = tf.mul(tf.atan(tf.matmul(self.h_fc4_drop, self.W_fc5) + self.b_fc5), 2, name='y')
self.x = x
self.y_ = y_
self.y = y
self.keep_prob = keep_prob
self.fc2 = self.h_fc2
self.fc3 = self.h_fc3
def Render_block(self,face_shape,face_norm,face_color,camera_scale,f_scale,facemodel,batchsize,is_train=True):
if is_train and is_windows:
raise ValueError('Not support training with Windows environment.')
if is_windows:
return [],[],[]
# render reconstruction images
n_vex = int(facemodel.idBase.shape[0].value/3)
fov_y = 2*tf.atan(112./(1015.*f_scale))*180./m.pi
fov_y = tf.reshape(fov_y,[batchsize])
# full face region
face_shape = tf.reshape(face_shape,[batchsize,n_vex,3])
face_norm = tf.reshape(face_norm,[batchsize,n_vex,3])
face_color = tf.reshape(face_color,[batchsize,n_vex,3])
# pre-defined cropped face region
mask_face_shape = tf.gather(face_shape,tf.cast(facemodel.front_mask_render-1,tf.int32),axis = 1)
mask_face_norm = tf.gather(face_norm,tf.cast(facemodel.front_mask_render-1,tf.int32),axis = 1)
mask_face_color = tf.gather(face_color,tf.cast(facemodel.front_mask_render-1,tf.int32),axis = 1)
# setting cammera settings
camera_position = tf.constant([[0,0,10.0]])*tf.reshape(camera_scale,[-1,1])
camera_lookat = tf.constant([0,0,0.0])
camera_up = tf.constant([0,1.0,0])
# setting light source position(intensities are set to 0 because we have computed the vertex color)
light_positions = tf.tile(tf.reshape(tf.constant([0,0,1e5]),[1,1,3]),[batchsize,1,1])
light_intensities = tf.tile(tf.reshape(tf.constant([0.0,0.0,0.0]),[1,1,3]),[batchsize,1,1])
ambient_color = tf.tile(tf.reshape(tf.constant([1.0,1,1]),[1,3]),[batchsize,1])
#using tf_mesh_renderer for rasterization (https://github.com/google/tf_mesh_renderer)
# img: [batchsize,224,224,3] images in RGB order (0-255)
# mask:[batchsize,224,224,1] transparency for img ({0,1} value)
img_rgba = mesh_renderer.mesh_renderer(face_shape,
tf.cast(facemodel.face_buf-1,tf.int32),
face_norm,
face_color,
camera_position = camera_position,
camera_lookat = camera_lookat,
camera_up = camera_up,
light_positions = light_positions,
light_intensities = light_intensities,
image_width = 224,
image_height = 224,
fov_y = fov_y,
near_clip = 0.01,
far_clip = 50.0,
ambient_color = ambient_color)
img = img_rgba[:,:,:,:3]
mask = img_rgba[:,:,:,3:]
img = tf.cast(img[:,:,:,::-1],tf.float32) #transfer RGB to BGR
mask = tf.cast(mask,tf.float32) # full face region
if is_train:
# compute mask for small face region
img_crop_rgba = mesh_renderer.mesh_renderer(mask_face_shape,
tf.cast(facemodel.mask_face_buf-1,tf.int32),
mask_face_norm,
mask_face_color,
camera_position = camera_position,
camera_lookat = camera_lookat,
camera_up = camera_up,
light_positions = light_positions,
light_intensities = light_intensities,
image_width = 224,
image_height = 224,
fov_y = fov_y,
near_clip = 0.01,
far_clip = 50.0,
ambient_color = ambient_color)
mask_f = img_crop_rgba[:,:,:,3:]
mask_f = tf.cast(mask_f,tf.float32) # small face region
return img,mask,mask_f
img_rgba = tf.cast(tf.clip_by_value(img_rgba,0,255),tf.float32)
return img_rgba,mask,mask
def _log_cdf(self, x):
return self._extend_support_with_default_value(
x,
lambda x: np.log(2 / np.pi) + tf.log(tf.atan(self._z(x))),
default_value=-np.inf)
