def not_equal(x1: Array, x2: Array, /) -> Array:
"""
Array API compatible wrapper for :py:func:`np.not_equal <numpy.not_equal>`.
See its docstring for more information.
"""
# Call result type here just to raise on disallowed type combinations
_result_type(x1.dtype, x2.dtype)
x1, x2 = Array._normalize_two_args(x1, x2)
return Array._new(np.not_equal(x1._array, x2._array))
def one_hot(self, y):
"""
one-hot encode : 1 is hot, -1 is cold
"""
onehot = cp.ones((len(y), self.n_classes))
classes = cp.tile(cp.arange(0, self.n_classes), len(y)).reshape(len(y), self.n_classes)
y = y.reshape(-1, 1)
mask = cp.not_equal(y, classes)
onehot[mask] = -1
return onehot
def test_csr_norms(norm, ref_norm, dtype, seed, shape):
X = np.random.RandomState(seed).randn(*shape).astype(dtype)
X_csr = sp.csr_matrix(X)
X_csr_gpu = cupyx.scipy.sparse.csr_matrix(X_csr)
norm(X_csr_gpu)
ref_norm(X_csr)
# checks that array have been changed inplace
assert cp.any(cp.not_equal(X_csr_gpu.todense(), cp.array(X)))
cp.testing.assert_array_almost_equal(X_csr_gpu.todense(), X_csr.todense())
def __ne__(self, other):
return cupy.not_equal(self, other)
def compute_loss(self, i, j, neg_i, neg_j):
xi = self.means[i]
# lvi = self.vars[i] + self.lbda * cp.eye(self.n_dim).reshape(1, self.n_dim, self.n_dim).repeat(len(i), axis=0)
lvi = self.vars[i]
xj = self.c_means[j]
# lvj = self.c_vars[j] + self.lbda * cp.eye(self.n_dim).reshape(1, self.n_dim, self.n_dim).repeat(len(j), axis=0)
lvj = self.c_vars[j]
self.vi = wb.to_full(lvi) + self.lbda * cp.eye(self.n_dim).reshape(
1, self.n_dim, self.n_dim).repeat(len(i), axis=0)
self.vj = wb.to_full(lvj) + self.lbda * cp.eye(self.n_dim).reshape(
1, self.n_dim, self.n_dim).repeat(len(j), axis=0) * cp.not_equal(
j, 0).reshape(-1, 1, 1)
# Same thing, with the negative batch
neg_xi = self.means[neg_i]
# lneg_vi = self.vars[neg_i] + self.lbda * cp.eye(self.n_dim).reshape(1, self.n_dim, self.n_dim).repeat(len(neg_i), axis=0)
lneg_vi = self.vars[neg_i]
neg_xj = self.c_means[neg_j]
# lneg_vj = self.c_vars[neg_j] + self.lbda * cp.eye(self.n_dim).reshape(1, self.n_dim, self.n_dim).repeat(len(neg_j), axis=0)
lneg_vj = self.c_vars[neg_j]
self.neg_vi = wb.to_full(lneg_vi) + self.lbda * cp.eye(
self.n_dim).reshape(1, self.n_dim, self.n_dim).repeat(len(neg_i),
axis=0)
self.neg_vj = wb.to_full(lneg_vj) + self.lbda * cp.eye(
self.n_dim).reshape(1, self.n_dim, self.n_dim).repeat(len(neg_j),
axis=0)
neg_wij, self.inv_n_ij, self.v_n_i_s, self.inv_v_n_i_s, self.mid_n_ij = wb.batch_W2(
neg_xi,
neg_xj,
self.neg_vi,
self.neg_vj,
Cn=self.Cn,
numIters=self.num_sqrt_iters,
prod=True)
wij, self.inv_ij, self.v_i_s, self.inv_v_i_s, self.mid_ij = wb.batch_W2(
xi,
xj,
self.vi,
self.vj,
Cn=self.Cn,
numIters=self.num_sqrt_iters,
sU=self.v_n_i_s[::self.num_neg],
inv_sU=self.inv_v_n_i_s[::self.num_neg],
prod=True)
losses = cp.maximum(
self.margin - wij +
neg_wij.reshape(-1, self.num_neg).sum(axis=1) / self.num_neg, 0.)
self.mask = cp.ones_like(losses)
self.mask[cp.where(losses == 0.)] = 0.
self.loss = losses.sum()
return self.loss
# for iter in tqdm(range(0,100)):
# dF_3D = cupy.multiply(cupy.subtract(cupy.divide(cupy.multiply(dn_3D,dn_3D),n_med2),1),-k2)
# dF_3D = cupy.fft.fftn(dF_3D)
# dF_3D[cupy.not_equal(dF_3D_2,0)] = dF_3D_2[cupy.not_equal(dF_3D_2,0)]
# dF_3D = cupy.fft.ifftn(dF_3D)
# dn_3D = cupy.multiply(cupy.sqrt(cupy.add(cupy.divide(dF_3D,-k2), 1)), n_med)
# #Positive constraint
# dn_3D[cupy.less(cupy.real(dn_3D),n_med)] = cupy.real(n_med)+cupy.imag(dn_3D[cupy.less(cupy.real(dn_3D),n_med)])
# dn_3D[cupy.less(cupy.imag(dn_3D),0)] = cupy.real(dn_3D[cupy.less(cupy.imag(dn_3D), 0)])
dF_3D = cupy.multiply(cupy.subtract(cupy.divide(cupy.multiply(dn_3D,dn_3D),n_med2),1),-k2)
dF_3D = cupy.fft.fftn(dF_3D)
dF_3D[cupy.not_equal(dF_3D_2,0)] = dF_3D_2[cupy.not_equal(dF_3D_2,0)]
dF_3D = cupy.fft.ifftn(dF_3D)
dn_3D = cupy.multiply(cupy.sqrt(cupy.add(cupy.divide(dF_3D,-k2), 1)), n_med)
dn_3D = cupy.fft.fftshift(dn_3D);
dn_3D[cupy.less(cupy.real(dn_3D),n_med)] = n_med+1j*cupy.imag(dn_3D[cupy.less(cupy.real(dn_3D),n_med)])
dn_3D[cupy.less(cupy.imag(dn_3D),0)] = cupy.real(dn_3D[cupy.less(cupy.imag(dn_3D), 0)])
##TVMIN + positiveconstrain + crop
tv = TvMin(dF_3D_2 = dF_3D_2 , lamb = 0.008, iteration = 100)
tv.setInputImage(dn_3D)
tv.minimize()
dn_3D = tv.getResultImage()