def fft_cost(true, pred, conf, fft_weights=None):
#loop over the color channels:
cost = 0.
true_fft_abssum = 0
pred_fft_abssum = 0
for i in range(3):
slice_true = tf.slice(true, [0, 0, 0, i], [-1, -1, -1, 1])
slice_pred = tf.slice(pred, [0, 0, 0, i], [-1, -1, -1, 1])
slice_true = tf.squeeze(
tf.complex(slice_true, tf.zeros_like(slice_true)))
slice_pred = tf.squeeze(
tf.complex(slice_pred, tf.zeros_like(slice_pred)))
true_fft = tf.fft2d(slice_true)
pred_fft = tf.fft2d(slice_pred)
if 'fft_emph_highfreq' in conf:
abs_diff = tf.mul(tf.complex_abs(true_fft - pred_fft), fft_weights)
cost += tf.reduce_sum(tf.square(abs_diff)) / tf.to_float(
tf.size(pred_fft))
else:
cost += tf.reduce_sum(
tf.square(tf.complex_abs(true_fft - pred_fft))) / tf.to_float(
tf.size(pred_fft))
true_fft_abssum += tf.complex_abs(true_fft)
pred_fft_abssum += tf.complex_abs(pred_fft)
return cost, true_fft_abssum, pred_fft_abssum
def buildModel_fft(input_dim):
# This network is used to pre-train the optical flow.
input_ = Input(shape=(input_dim))
# =========================================================================
act_ = net_base(input_, nb_filter=64)
# =========================================================================
density_pred = Convolution2D(1, 1, 1, bias = False, activation='linear',\
init='orthogonal',name='pred',border_mode='same')(act_)
imageMean = tf.reduce_mean(density_pred)
node4 = tf.reshape(density_pred, [1, 1, 128, 128])
fftstack = tf.fft2d(tf.complex(node4, tf.zeros((1, 1, 128, 128))))
out = (tf.cast(tf.complex_abs(tf.ifft2d(fftstack * tf.conj(fftstack))),
dtype=tf.float32) / imageMean**2 / (128 * 128)) - 1
def count(out):
sigma = 4.0
rough_sig = sigma * 2.3588 * 0.8493218
return (128 * 128) / (
(tf.reduce_max(out) - tf.reduce_min(out)) * np.pi * (rough_sig**2))
#lam.build((1,1))
y_true_cast = K.placeholder(shape=(1, 1, 128, 128), dtype='float32')
#K.set_value(y_true_cast,out)
# =========================================================================
model = Model(input=input_, output=density_pred)
opt = SGD(lr=1e-2, momentum=0.9, nesterov=True)
model.compile(optimizer=opt, loss='mse')
return model
def __call__(self, inputs, state, scope=None):
with tf.variable_scope(scope or type(self).__name__):
unitary_hidden_state, secondary_cell_hidden_state = tf.split(
1, 2, state)
mat_in = tf.get_variable('mat_in',
[self.input_size, self.state_size * 2])
mat_out = tf.get_variable('mat_out',
[self.state_size * 2, self.output_size])
in_proj = tf.matmul(inputs, mat_in)
in_proj_c = tf.complex(tf.split(1, 2, in_proj))
out_state = modReLU(
in_proj_c + ulinear(unitary_hidden_state, self.state_size),
tf.get_variable(name='bias',
dtype=tf.float32,
shape=tf.shape(unitary_hidden_state),
initializer=tf.constant_initalizer(0.)),
scope=scope)
with tf.variable_scope('unitary_output'):
'''computes data linear, unitary linear and summation -- TODO: should be complex output'''
unitary_linear_output_real = linear.linear(
[tf.real(out_state),
tf.imag(out_state), inputs], True, 0.0)
with tf.variable_scope('scale_nonlinearity'):
modulus = tf.complex_abs(unitary_linear_output_real)
rescale = tf.maximum(modulus + hidden_bias, 0.) / (modulus + 1e-7)
#transition to data shortcut connection
#out_ = tf.matmul(tf.concat(1,[tf.real(out_state), tf.imag(out_state), ] ), mat_out) + out_bias
#hidden state is complex but output is completely real
return out_, out_state #complex
def __call__(self, inputs, state, scope=None ):
with tf.variable_scope(scope or type(self).__name__):
unitary_hidden_state, secondary_cell_hidden_state = tf.split(1,2,state)
mat_in = tf.get_variable('mat_in', [self.input_size, self.state_size*2])
mat_out = tf.get_variable('mat_out', [self.state_size*2, self.output_size])
in_proj = tf.matmul(inputs, mat_in)
in_proj_c = tf.complex(tf.split(1,2,in_proj))
out_state = modReLU( in_proj_c +
ulinear(unitary_hidden_state, self.state_size),
tf.get_variable(name='bias', dtype=tf.float32, shape=tf.shape(unitary_hidden_state), initializer = tf.constant_initalizer(0.)),
scope=scope)
with tf.variable_scope('unitary_output'):
'''computes data linear, unitary linear and summation -- TODO: should be complex output'''
unitary_linear_output_real = linear.linear([tf.real(out_state), tf.imag(out_state), inputs], True, 0.0)
with tf.variable_scope('scale_nonlinearity'):
modulus = tf.complex_abs(unitary_linear_output_real)
rescale = tf.maximum(modulus + hidden_bias, 0.) / (modulus + 1e-7)
#transition to data shortcut connection
#out_ = tf.matmul(tf.concat(1,[tf.real(out_state), tf.imag(out_state), ] ), mat_out) + out_bias
#hidden state is complex but output is completely real
return out_, out_state #complex
def _testGrad(self,
shape,
dtype=None,
max_error=None,
bias=None,
sigma=None):
np.random.seed(7)
if dtype in (tf.complex64, tf.complex128):
value = tf.complex(
self._biasedRandN(shape, bias=bias, sigma=sigma),
self._biasedRandN(shape, bias=bias, sigma=sigma))
else:
value = tf.convert_to_tensor(self._biasedRandN(shape, bias=bias),
dtype=dtype)
for use_gpu in [True, False]:
with self.test_session(use_gpu=use_gpu):
if dtype in (tf.complex64, tf.complex128):
output = tf.complex_abs(value)
else:
output = tf.abs(value)
error = tf.test.compute_gradient_error(
value, shape, output,
output.get_shape().as_list())
self.assertLess(error, max_error)
def istft(spec, overlap=4):
assert (spec.shape[0] > 1)
S = placeholder(dtype=tf.complex64, shape=spec.shape)
X = tf.complex_abs(tf.concat(0, [tf.ifft(frame) \
for frame in tf.unstack(S)]))
sess = tf.Session()
return sess.run(X, feed_dict={S: spec})
def modrelu_c(in_c, bias):
if not in_c.dtype.is_complex:
raise(ValueError('modrelu_c: Argument in_c must be complex type'))
if bias.dtype.is_complex:
raise(ValueError('modrelu_c: Argument bias must be real type'))
n = tf.complex_abs(in_c)
scale = 1./(n+1e-5)
return complex_mul_real(in_c, ( tf.nn.relu(n+bias)*scale ))
def fft_discriminator(self, inp):
scaled_inp = inp / 256
shuffled_inp = tf.transpose(scaled_inp, perm=[0, 3, 1, 2])
inp_fft = tf.fft2d(tf.cast(shuffled_inp, tf.complex64))
amp = tf.complex_abs(inp_fft)
with tf.variable_scope("fft_dense1"):
h = dense_block(amp, leaky_relu=True, output_size=1024)
with tf.variable_scope("fft_dense2"):
h = dense_block(h, output_size=1)
return h
def testArithmeticRenames(self):
with self.test_session() as s:
stuff = tf.split(1, 2, [[1, 2, 3, 4], [4, 5, 6, 7]])
vals = s.run(stuff)
self.assertAllEqual(vals, [[[1, 2], [4, 5]], [[3, 4], [6, 7]]])
self.assertAllEqual(tf.neg(tf.mul(tf.add(1, 2), tf.sub(5, 3))).eval(), -6)
self.assertAllEqual(s.run(tf.listdiff([1, 2, 3], [3, 3, 4]))[0], [1, 2])
self.assertAllEqual(tf.list_diff([1, 2, 3], [3, 3, 4])[0].eval(), [1, 2])
a = [[1.0, 2.0, 3.0], [4.0, 5.0, 6.0]]
foo = np.where(np.less(a, 2), np.negative(a), a)
self.assertAllEqual(tf.select(tf.less(a, 2), tf.neg(a), a).eval(), foo)
self.assertAllEqual(tf.complex_abs(tf.constant(3 + 4.0j)).eval(), 5)
def _testGrad(self, shape, dtype=None, max_error=None, bias=None, sigma=None):
np.random.seed(7)
if dtype in (tf.complex64, tf.complex128):
value = tf.complex(
self._biasedRandN(shape, bias=bias, sigma=sigma), self._biasedRandN(shape, bias=bias, sigma=sigma)
)
else:
value = tf.convert_to_tensor(self._biasedRandN(shape, bias=bias), dtype=dtype)
with self.test_session(use_gpu=True):
if dtype in (tf.complex64, tf.complex128):
output = tf.complex_abs(value)
else:
output = tf.abs(value)
error = tf.test.compute_gradient_error(value, shape, output, output.get_shape().as_list())
self.assertLess(error, max_error)
def testArithmeticRenames(self):
with self.cached_session() as s:
stuff = tf.split(1, 2, [[1, 2, 3, 4], [4, 5, 6, 7]])
vals = s.run(stuff)
self.assertAllEqual(vals, [[[1, 2], [4, 5]], [[3, 4], [6, 7]]])
self.assertAllEqual(
tf.neg(tf.mul(tf.add(1, 2), tf.sub(5, 3))).eval(), -6)
self.assertAllEqual(
s.run(tf.listdiff([1, 2, 3], [3, 3, 4]))[0], [1, 2])
self.assertAllEqual(
tf.list_diff([1, 2, 3], [3, 3, 4])[0].eval(), [1, 2])
a = [[1., 2., 3.], [4., 5., 6.]]
foo = np.where(np.less(a, 2), np.negative(a), a)
self.assertAllEqual(
tf.select(tf.less(a, 2), tf.neg(a), a).eval(), foo)
self.assertAllEqual(tf.complex_abs(tf.constant(3 + 4.j)).eval(), 5)
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 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 stft(wav, n_fft=1024, overlap=4, dt=tf.int32, absp=False):
assert (wav.shape[0] > n_fft)
X = tf.placeholder(dtype=dt, shape=wav.shape)
X = tf.cast(X, tf.float32)
hop = n_fft / overlap
## prepare constant variable
Pi = tf.constant(np.pi, dtype=tf.float32)
W = tf.constant(scipy.hanning(n_fft), dtype=tf.float32)
S = tf.pack([tf.fft(tf.cast(tf.multiply(W,X[i:i+n_fft]),\
tf.complex64)) for i in range(1, wav.shape[0] - n_fft, hop)])
abs_S = tf.complex_abs(S)
sess = tf.Session()
if absp:
return sess.run(abs_S, feed_dict={X: wav})
else:
return sess.run(S, feed_dict={X: wav})
def test_fft():
img = Image.open('test.png')
img.show()
img = np.asarray(img)
input_image = tf.placeholder(tf.float32, shape= [64, 64, 3])
img = img.astype(np.float32) / 255.
with tf.Session() as sess:
sess.run(tf.initialize_all_variables())
feed_dict = {input_image: img,
}
fft_abs = 0
for i in range(3):
input_slice = tf.slice(input_image, [0, 0, i], [-1, -1, 1])
input_slice = tf.squeeze(tf.complex(input_slice, tf.zeros_like(input_slice)))
fft = tf.fft2d(input_slice)
fft_abs += tf.complex_abs(fft)
fft_res = sess.run([fft_abs], feed_dict= feed_dict)
fft_res = np.clip(fft_res, 0, 10)
fft_res = np.squeeze(fft_res)
# fft_res = fft_res[5:59, 5:59]
plt.imshow(fft_res)
plt.colorbar()
plt.show()
res_img = Image.fromarray((fft_res*255.).astype(np.uint8))
res_img.show()
# JULIA SET
# Y, X = np.mgrid[-2:2:0.005, -2:2:0.005]
# Definiamo il punto corrente
Z = X + 1j * Y
c = tf.constant(Z.astype("complex64"))
zs = tf.Variable(c)
ns = tf.Variable(tf.zeros_like(c, "float32"))
# c = complex(0.0,0.75)
# c = complex(-1.5,-1.5)
sess = tf.InteractiveSession()
tf.global_variables_initializer().run()
# Compute the new values of z: z^2 + x
zs_ = zs * zs + c
# zs_ = zs*zs - c
# Have we diverged with this new value?
not_diverged = tf.complex_abs(zs_) < 4
step = tf.group(zs.assign(zs_), ns.assign_add(tf.cast(not_diverged,
"float32")))
for i in range(200):
step.run()
plt.imshow(ns.eval())
plt.show()
def test_ComplexAbs(self):
t = tf.complex_abs(self.random(3, 4, complex=True))
self.check(t)
tf.matmul(a, b, transpose_a=False,
transpose_b=False, a_is_sparse=False,
b_is_sparse=False, name=None) 矩阵相乘
tf.matrix_determinant(input, name=None) 返回方阵的行列式
tf.matrix_inverse(input, adjoint=None, name=None) 求方阵的逆矩阵，adjoint为True时，计算输入共轭矩阵的逆矩阵
tf.cholesky(input, name=None) 对输入方阵cholesky分解，
即把一个对称正定的矩阵表示成一个下三角矩阵L和其转置的乘积的分解A=LL^T
tf.matrix_solve(matrix, rhs, adjoint=None, name=None) 求解tf.matrix_solve(matrix, rhs, adjoint=None, name=None)
matrix为方阵shape为[M,M],rhs的shape为[M,K]，output为[M,K]
四、复数操作
tf.complex(real, imag, name=None) 将两实数转换为复数形式
# tensor ‘real’ is [2.25, 3.25]
# tensor imag is [4.75, 5.75]
tf.complex(real, imag) ==> [[2.25 + 4.75j], [3.25 + 5.75j]]
tf.complex_abs(x, name=None) 计算复数的绝对值，即长度。
# tensor ‘x’ is [[-2.25 + 4.75j], [-3.25 + 5.75j]]
tf.complex_abs(x) ==> [5.25594902, 6.60492229]
tf.conj(input, name=None) 计算共轭复数
tf.imag(input, name=None)
tf.real(input, name=None) 提取复数的虚部和实部
tf.fft(input, name=None) 计算一维的离散傅里叶变换，输入数据类型为complex64
五、归约计算(Reduction)
tf.reduce_sum(input_tensor, reduction_indices=None,
keep_dims=False, name=None) 计算输入tensor元素的和，或者安照reduction_indices指定的轴进行求和
# ‘x’ is [[1, 1, 1]
# [1, 1, 1]]
tf.reduce_sum(x) ==> 6
tf.reduce_sum(x, 0) ==> [2, 2, 2]
tf.reduce_sum(x, 1) ==> [3, 3]
def get_reg_loss(tfs):
# Regulizer
with tf.name_scope('reg_errors'):
reg_loss = tfs.loss
# amplitude
if 'amplitude' in tfs.sys_para.reg_coeffs:
amp_reg_alpha_coeff = tfs.sys_para.reg_coeffs['amplitude']
amp_reg_alpha = amp_reg_alpha_coeff / float(tfs.sys_para.steps)
reg_loss = reg_loss + amp_reg_alpha * tf.nn.l2_loss(tfs.ops_weight)
# gaussian envelope
if 'envelope' in tfs.sys_para.reg_coeffs:
reg_alpha_coeff = tfs.sys_para.reg_coeffs['envelope']
reg_alpha = reg_alpha_coeff / float(tfs.sys_para.steps)
reg_loss = reg_loss + reg_alpha * tf.nn.l2_loss(
tf.mul(tfs.tf_one_minus_gaussian_envelope, tfs.ops_weight))
# Limiting the dwdt of control pulse
if 'dwdt' in tfs.sys_para.reg_coeffs:
zeros_for_training = tf.zeros([tfs.sys_para.ops_len, 2])
new_weights = tf.concat(1, [tfs.ops_weight, zeros_for_training])
new_weights = tf.concat(1, [zeros_for_training, new_weights])
dwdt_reg_alpha_coeff = tfs.sys_para.reg_coeffs['dwdt']
dwdt_reg_alpha = dwdt_reg_alpha_coeff / float(tfs.sys_para.steps)
reg_loss = reg_loss + dwdt_reg_alpha * tf.nn.l2_loss(
(new_weights[:, 1:] - new_weights[:, :tfs.sys_para.steps + 3]) / tfs.sys_para.dt)
# Limiting the d2wdt2 of control pulse
if 'd2wdt2' in tfs.sys_para.reg_coeffs:
d2wdt2_reg_alpha_coeff = tfs.sys_para.reg_coeffs['d2wdt2']
d2wdt2_reg_alpha = d2wdt2_reg_alpha_coeff / float(tfs.sys_para.steps)
reg_loss = reg_loss + d2wdt2_reg_alpha * tf.nn.l2_loss((new_weights[:, 2:] - \
2 * new_weights[:,
1:tfs.sys_para.steps + 3] + new_weights[:,
:tfs.sys_para.steps + 2]) / (
tfs.sys_para.dt ** 2))
# bandpass filter on the control
if 'bandpass' in tfs.sys_para.reg_coeffs:
## currently does not support bandpass reg for CPU (no CPU kernel for FFT)
if not tfs.sys_para.use_gpu:
raise ValueError('currently does not support bandpass reg for CPU (no CPU kernel for FFT)')
bandpass_reg_alpha_coeff = tfs.sys_para.reg_coeffs['bandpass']
bandpass_reg_alpha = bandpass_reg_alpha_coeff/ float(tfs.sys_para.steps)
tf_u = tf.cast(tfs.ops_weight,dtype=tf.complex64)
tf_fft = tf.complex_abs(tf.fft(tf_u))
band = np.array(tfs.sys_para.reg_coeffs['band'])
band_id = (band*tfs.sys_para.total_time).astype(int)
half_id = int(tfs.sys_para.steps/2)
fft_loss = bandpass_reg_alpha*(tf.reduce_sum(tf_fft[:,0:band_id[0]]) + tf.reduce_sum(tf_fft[:,band_id[1]:half_id]))
reg_loss = reg_loss + fft_loss
# Limiting the access to forbidden states
if 'forbidden' in tfs.sys_para.reg_coeffs:
inter_reg_alpha_coeff = tfs.sys_para.reg_coeffs['forbidden']
inter_reg_alpha = inter_reg_alpha_coeff / float(tfs.sys_para.steps)
if tfs.sys_para.is_dressed:
v_sorted = tf.constant(c_to_r_mat(np.reshape(sort_ev(tfs.sys_para.v_c, tfs.sys_para.dressed_id),
[len(tfs.sys_para.dressed_id), len(tfs.sys_para.dressed_id)])),
dtype=tf.float32)
for inter_vec in tfs.inter_vecs:
if tfs.sys_para.is_dressed and ('forbid_dressed' in tfs.sys_para.reg_coeffs and tfs.sys_para.reg_coeffs['forbid_dressed']):
inter_vec = tf.matmul(tf.transpose(v_sorted), inter_vec)
for state in tfs.sys_para.reg_coeffs['states_forbidden_list']:
forbidden_state_pop = tf.square(inter_vec[state, :]) + \
tf.square(inter_vec[tfs.sys_para.state_num + state, :])
reg_loss = reg_loss + inter_reg_alpha * tf.nn.l2_loss(forbidden_state_pop)
# Speeding up the gate time
if 'speed_up' in tfs.sys_para.reg_coeffs:
speed_up_reg_alpha_coeff = - tfs.sys_para.reg_coeffs['speed_up']
speed_up_reg_alpha = speed_up_reg_alpha_coeff / float(tfs.sys_para.steps)
target_vecs_all_timestep = tf.tile(tf.reshape(tfs.target_vecs,[2*tfs.sys_para.state_num,1,len(tfs.inter_vecs)]) , [1,tfs.sys_para.steps+1,1])
target_vecs_inner_product = tfs.get_inner_product_3D(tfs.inter_vecs_packed,target_vecs_all_timestep)
reg_loss = reg_loss + speed_up_reg_alpha * tf.nn.l2_loss(target_vecs_inner_product)
return reg_loss
def main():
# Use NumPy to create a 2D array of complex numbers on [-2,2]x[-2,2]
Y, X = np.mgrid[-1.3:1.3:0.005, -2:1:0.005]
print 'Y shape: ', Y.shape
print 'X shape: ', X.shape
Z = X+1j*Y
xs = tf.constant(Z.astype("complex64"))
zs = tf.Variable(xs)
ns = tf.Variable(tf.zeros_like(xs, "float32"))
not_diverged = tf.Variable(np.ones(Z.shape, dtype=np.bool))
Z_mod_at_div = tf.Variable(2 * tf.ones_like(xs, "float32"))
for i in range(MAX_ITERS):
# Compute the new values of z: z^2 + x
zs_ = zs*zs + xs
# Have we diverged with this new value?
cur_mod = tf.complex_abs(zs_)
not_diverged_ = cur_mod < 4
# Operation to update the zs and the iteration count.
# Note: We keep computing zs after they diverge! This
# is very wasteful! There are better, if a little
# less simple, ways to do this.
ns_ = ns + tf.cast(not_diverged_, "float32")
diverged_this_step = tf.logical_and(tf.logical_not(not_diverged_), not_diverged)
Z_mod_at_div = tf.select(diverged_this_step, cur_mod, Z_mod_at_div)
zs = zs_
ns = ns_
not_diverged = not_diverged_
mus = tf.select(not_diverged, ns, ns + 1 - tf.log(tf.log(Z_mod_at_div)) / np.log(2))
with tf.Session() as sess:
tf.initialize_all_variables().run()
print 'running!'
ns_evaled, Z_mod_at_div_evaled, mus_evaled = sess.run([ns, Z_mod_at_div, mus])
print 'done running!'
print Z_mod_at_div_evaled
non_zeros_z_mod = np.where(np.abs(Z_mod_at_div_evaled) > 0.01)
print non_zeros_z_mod
print 'max mod: %f, min mod: %f' % (np.max(Z_mod_at_div_evaled), np.min(Z_mod_at_div_evaled[non_zeros_z_mod]))
print 'diff between mus and ns: '
diff = mus_evaled - ns_evaled
print diff
print 'max: %f, min: %f' % (np.max(diff), np.min(diff))
DisplayFractal(mus_evaled, 'mandelbrot.png')
DisplayFractal(ns_evaled, 'mandelbrot_notfrac.png')
img_int_ext = interior_exterior_map(ns_evaled)
print "img_int_ext.max, %f, img_int_ext.min: %f" % \
(img_int_ext.max(), img_int_ext.min())
location = (X.shape[0] / 2, (4 * X.shape[1]) / 5)
radius = (X.shape[0] / 10)
ext_radius = (X.shape[0] / 70)
img_int_ext_pendant = add_pendant(img_int_ext, location, radius, ext_radius)
DisplayFractal(img_int_ext_pendant, "mandelbrot_int_ext_pendant.png")
img_int_ext_pendant_noend = np.copy(img_int_ext_pendant)
for i in xrange(X.shape[1] / 5):
for j in xrange(X.shape[0]):
img_int_ext_pendant_noend[j, i] = 1
DisplayFractal(img_int_ext_pendant_noend, "mandelbrot_int_ext_pendant_noend.png")
img_int_ext_pendant_noend_bigmiddle = np.copy(img_int_ext_pendant_noend)
location_bigmiddle = np.array((X.shape[0] / 2, int(X.shape[1] / 2.5)))
radius_bigmiddle = X.shape[1] / 25
for i in xrange(X.shape[1]):
for j in xrange(X.shape[0]):
dist = norm(np.array((j, i)) - location_bigmiddle)
if dist < radius_bigmiddle:
img_int_ext_pendant_noend_bigmiddle[j, i] = -1
DisplayFractal(img_int_ext_pendant_noend_bigmiddle, "mandelbrot_int_ext_pendant_noend_bigmiddle.png")
print "img_int_ext: "
print img_int_ext
DisplayFractal(img_int_ext, "mandelbrot_int_ext.png")
contours = measure.find_contours(img_int_ext_pendant_noend_bigmiddle, 0.0)
len_contours = [len(contour_i) for contour_i in contours]
print len_contours
contours_sorted_by_size = sorted(contours, key=len)
len_contours = [len(contour_i) for contour_i in contours]
print len_contours
bigcontour = contours_sorted_by_size[0]
#embed()
#bigcontour_int_ext = contour_to_int_ext_map(bigcontour, X, Y)
#embed()
#fig, ax = plt.subplots()
#ax.imshow(img_int_ext, interpolation='nearest', cmap=plt.cm.gray)
#for n, contour in enumerate(contours):
#ax.plot(contour[:, 1], contour[:, 0], linewidth=2)
#ax.plot(bigcontour[:, 1], bigcontour[:, 0], linewidth=2)
#ax.axis('image')
#ax.set_xticks([])
#ax.set_yticks([])
dwg = svgwrite.Drawing('mandelbrot.svg', profile='tiny')
for j in [-1, -2]:
contour = contours_sorted_by_size[j]
for i in xrange(contour.shape[0] - 1):
#print tuple(bigcontour[i])
dwg.add(dwg.line(tuple(contour[i]), tuple(contour[i + 1]), \
stroke=svgwrite.rgb(10, 10, 16, '%')))
#dwg.add(dwg.text('Test', insert=(0, 0.2), fill='red'))
dwg.save()
#plt.show()
#error = 100 * np.abs(mus_evaled - ns_evaled)
#print error.shape
#error = error.reshape(list(error.shape)+[1])
#print error.shape
#error_img = np.concatenate([error, error, error], 2)
#error_img = np.uint8(np.clip(error_img, 0, 255))
#scipy.misc.imsave('mandelbrot_errors.png', error_img)
# 3d mandelbrot!
max_dist = 10
#tsdf = gen_tsdf(img_int_ext_pendant_noend_bigmiddle, max_dist)
tsdf = np.load("tsdf_10.npy")
#np.save("tsdf_10", tsdf)
#plt.imshow(tsdf)
#plt.show()
# a = -3 / 20
# b = 53 / 20
# c = -1
# for 10.5 at 10, 8.5 at 5, and 1.5 at 1
# with a * x**2 + b * x + c formula for height
int_ext_3d_map = gen_int_ext_3d_map_from_tsdf(tsdf, max_dist)
#embed()
vertices, triangles = mcubes.marching_cubes(int_ext_3d_map, 0)
mcubes.export_mesh(vertices, triangles, "mandelbrot_smoothed.dae", "Mandelbrot_pendant")
#embed()
from mayavi import mlab
mlab.triangular_mesh(
vertices[:, 0], vertices[:, 1], vertices[:, 2],
triangles)
mlab.show()
def inference(images, isTraining=False):
"""Build the grka model.
Args:
images: Images returned from distorted_inputs() or inputs().
Returns:
Logits.
"""
# We instantiate all variables using tf.get_variable() instead of
# tf.Variable() in order to share variables across multiple GPU
# training runs.
# If we only ran this model on a single GPU, we could simplify this function
# by replacing all instances of tf.get_variable() with tf.Variable().
images = tf.identity(images, name="inference_input")
batch_size = images.get_shape()[0].value
keepProp = tf.identity(FLAGS.dropout_keep_probability, name="keepProb")
spect = tf.complex_abs(
tf.split(1, 2,
tf.fft(tf.complex(images * hamming,
tf.zeros_like(images))))[0])
window_width = 2205
shift = 735
data = tf.reshape([
tf.split(
1, 2,
tf.pad(
tf.fft(
tf.reshape(
tf.complex(
images[:, i:i + window_width] * hamming2,
tf.zeros_like(images[:, i:i + window_width])),
[batch_size, window_width])), [[0, 0], [0, 1]]))[0]
for i in range(0, IMAGE_SIZE - window_width + 1, shift)
], [4, batch_size, 1103])
data = tf.reshape(tf.transpose(tf.complex_abs(data), [1, 0, 2]),
[batch_size, 1103 * 4])
spect = tf.concat(1, [spect, data])
tf.summary.image('images',
tf.reshape(spect, [batch_size, 1, 6617, 1]),
max_outputs=16)
spect = tf.reshape(spect, [batch_size, 6617, 1])
with tf.variable_scope('conv1') as scope:
# Move everything into depth so we can perform a single matrix multiply.
# reshape = tf.reshape(spect, [FLAGS.batch_size, -1])
kernel = _variable_with_weight_decay('weights',
shape=[3, 1, 64],
connections=3 + 64,
wd=WEIGHT_DECAY)
conv = tf.nn.conv1d(spect, kernel, 1, padding='SAME')
bias = batch_norm_wrapper(conv,
is_training=isTraining,
shape=[0, 1, 2])
conv1 = tf.nn.elu(bias, name=scope.name)
_activation_summary(conv1)
# grid = put_activations_on_grid(tf.reshape(conv, [batch_size, 1, 6617,
# 64]), (8, 8))
# tf.summary.image('conv1/activations', grid, max_outputs=1)
pool1 = tf.reshape(
tf.nn.max_pool(tf.reshape(conv1, [batch_size, 6617, 1, 64]),
ksize=[1, 2, 1, 1],
strides=[1, 2, 1, 1],
padding='SAME',
name='pool1'), [batch_size, 3309, 64])
with tf.variable_scope('conv2') as scope:
kernel = _variable_with_weight_decay('weights',
shape=[3, 64, 64],
connections=3 * 64 + 64,
wd=WEIGHT_DECAY)
conv = tf.nn.conv1d(pool1, kernel, 1, padding='SAME')
bias = batch_norm_wrapper(conv,
is_training=isTraining,
shape=[0, 1, 2])
conv2 = tf.nn.elu(bias, name=scope.name)
_activation_summary(conv2)
pool2 = tf.reshape(
tf.nn.max_pool(tf.reshape(conv2, [batch_size, 3309, 1, 64]),
ksize=[1, 2, 1, 1],
strides=[1, 2, 1, 1],
padding='SAME',
name='pool2'), [batch_size, 1655, 64])
with tf.variable_scope('conv3') as scope:
kernel = _variable_with_weight_decay('weights',
shape=[3, 64, 64],
connections=3 * 64 + 64,
wd=WEIGHT_DECAY)
conv = tf.nn.conv1d(pool2, kernel, 1, padding='SAME')
bias = batch_norm_wrapper(conv,
is_training=isTraining,
shape=[0, 1, 2])
conv3 = tf.nn.elu(bias, name=scope.name)
_activation_summary(conv3)
pool3 = tf.reshape(
tf.nn.max_pool(tf.reshape(conv3, [batch_size, 1655, 1, 64]),
ksize=[1, 2, 1, 1],
strides=[1, 2, 1, 1],
padding='SAME',
name='pool3'), [batch_size, 828, 64])
with tf.variable_scope('conv4') as scope:
kernel = _variable_with_weight_decay('weights',
shape=[3, 64, 128],
connections=3 * 64 + 128,
wd=WEIGHT_DECAY)
conv = tf.nn.conv1d(pool3, kernel, 1, padding='SAME')
bias = batch_norm_wrapper(conv,
is_training=isTraining,
shape=[0, 1, 2])
conv4 = tf.nn.elu(bias, name=scope.name)
_activation_summary(conv4)
# grid = put_activations_on_grid(tf.reshape(conv, [batch_size, 1, 828,
# 128]), (16, 8))
# tf.summary.image('conv1/activations', grid, max_outputs=1)
pool4 = tf.reshape(
tf.nn.max_pool(tf.reshape(conv4, [batch_size, 828, 1, 128]),
ksize=[1, 2, 1, 1],
strides=[1, 2, 1, 1],
padding='SAME',
name='pool4'), [batch_size, -1])
# local3
with tf.variable_scope('local1') as scope:
# Move everything into depth so we can perform a single matrix multiply.
# reshape = tf.reshape(spect, [FLAGS.batch_size, -1])
reshape = tf.reshape(pool4, [batch_size, -1])
dim = reshape.get_shape()[1].value
weights = _variable_with_weight_decay('weights',
shape=[dim, 6624],
connections=dim + 6624,
wd=WEIGHT_DECAY)
bn1 = batch_norm_wrapper(tf.matmul(reshape, weights),
is_training=isTraining)
local1 = tf.nn.elu(bn1, name=scope.name)
local1 = tf.nn.dropout(local1, keepProp)
_activation_summary(local1)
# softmax, i.e. softmax(WX + b)
with tf.variable_scope('softmax_linear') as scope:
weights = _variable_with_weight_decay(
'weights', [6624, NUM_CLASSES + 1],
connections=6624 + NUM_CLASSES + 1,
wd=0.0)
biases = _variable_on_cpu('biases', [NUM_CLASSES + 1],
tf.constant_initializer(0.0))
softmax_linear = tf.add(tf.matmul(local1, weights),
biases,
name=scope.name)
_activation_summary(softmax_linear)
return softmax_linear
# Use NumPy to create a 2D array of complex numbers on [-2,2]x[-2,2] Y, X = np.mgrid[-1.3:1.3:0.005, -2:1:0.005] Z = X+1j*Y xs = tf.constant(Z.astype(np.complex64)) zs = tf.Variable(xs) ns = tf.Variable(tf.zeros_like(xs, tf.float32)) tf.global_variables_initializer().run() # Compute the new values of z: z^2 + x zs_ = zs*zs + xs # Have we diverged with this new value? not_diverged = tf.complex_abs(zs_) < 4 # Operation to update the zs and the iteration count. # # Note: We keep computing zs after they diverge! This # is very wasteful! There are better, if a little # less simple, ways to do this. # step = tf.group( zs.assign(zs_), ns.assign_add(tf.cast(not_diverged, tf.float32)) ) for i in range(200): step.run() DisplayFractal(ns.eval())
def complex_mod_of_real(x):
xshp = x.get_shape().as_list()
assert xshp[1] % 2 == 0
xcplx = tf.complex(x[:, 0:xshp[1]/2], x[:, xshp[1]/2:])
return tf.complex_abs(xcplx)