Python tensor.tensor4方法代碼示例

# 需要導入模塊: from theano import tensor [as 別名]
# 或者: from theano.tensor import tensor4 [as 別名]
def test_cmrnorm():
    from theano.tests.unittest_tools import verify_grad

    xtest = np.random.rand(2,8,3,4)
    xtest = xtest.astype(theano.config.floatX)

    x = T.tensor4('x', dtype=theano.config.floatX)
    x.tag.test_value = xtest

    y = cmrnorm(x, input_shape=xtest.shape[1:])
    f = theano.function([x], y, mode='DEBUG_MODE')
    f(xtest)

    f = theano.function([x], gpu_from_host(T.grad(T.sum(y), wrt=x)),
                        mode='DEBUG_MODE')
    f(xtest)
    theano.printing.debugprint(f)

    T.verify_grad(lambda x: cmrnorm(x, input_shape=xtest.shape[1:]),
                  (xtest,),
                  rng=np.random.RandomState(0))

    print 'cmrnorm passed' 

# 需要導入模塊: from theano import tensor [as 別名]
# 或者: from theano.tensor import tensor4 [as 別名]
def __init__(self, random_seed=dt.datetime.now().microsecond, compute_grad=True):
        self.rng = np.random.RandomState(random_seed)

        self.batch_size = cfg.CONST.BATCH_SIZE
        self.img_w = cfg.CONST.IMG_W
        self.img_h = cfg.CONST.IMG_H
        self.n_vox = cfg.CONST.N_VOX
        self.compute_grad = compute_grad

        # (self.batch_size, 3, self.img_h, self.img_w),
        # override x and is_x_tensor4 when using multi-view network
        self.x = tensor.tensor4()
        self.is_x_tensor4 = True

        # (self.batch_size, self.n_vox, 2, self.n_vox, self.n_vox),
        self.y = tensor5()

        self.activations = []  # list of all intermediate activations
        self.loss = []  # final loss
        self.output = []  # final output
        self.error = []  # final output error
        self.params = []  # all learnable params
        self.grads = []  # will be filled out automatically
        self.setup() 

# 需要導入模塊: from theano import tensor [as 別名]
# 或者: from theano.tensor import tensor4 [as 別名]
def __init__(self,convolutional_layers,feature_maps,filter_shapes,poolsize,feedforward_layers,feedforward_nodes,classes,learning_rate,regularization):
        self.input = T.tensor4()
        self.convolutional_layers = []
        self.convolutional_layers.append(convolutional_layer(self.input,feature_maps[1],feature_maps[0],filter_shapes[0][0],filter_shapes[0][1],poolsize[0]))
        for i in range(1,convolutional_layers):
            self.convolutional_layers.append(convolutional_layer(self.convolutional_layers[i-1].output,feature_maps[i+1],feature_maps[i],filter_shapes[i][0],filter_shapes[i][1],poolsize[i]))
        self.feedforward_layers = []
        self.feedforward_layers.append(feedforward_layer(self.convolutional_layers[-1].output.flatten(2),flattened,feedforward_nodes[0]))
        for i in range(1,feedforward_layers):
            self.feedforward_layers.append(feedforward_layer(self.feedforward_layers[i-1].output,feedforward_nodes[i-1],feedforward_nodes[i]))
        self.output_layer = feedforward_layer(self.feedforward_layers[-1].output,feedforward_nodes[-1],classes)
        self.params = []
        for l in self.convolutional_layers + self.feedforward_layers:
            self.params.extend(l.get_params())
        self.params.extend(self.output_layer.get_params())
        self.target = T.matrix()
        self.output = self.output_layer.output
        self.cost = -self.target*T.log(self.output)-(1-self.target)*T.log(1-self.output)
        self.cost = self.cost.mean()
        for i in range(convolutional_layers+feedforward_layers+1):
            self.cost += regularization*(self.params[2*i]**2).mean()
        self.gparams = [T.grad(self.cost, param) for param in self.params]
        self.propogate = theano.function([self.input,self.target],self.cost,updates=[(param,param-learning_rate*gparam) for param,gparam in zip(self.params,self.gparams)],allow_input_downcast=True)
        self.classify = theano.function([self.input],self.output,allow_input_downcast=True) 

# 需要導入模塊: from theano import tensor [as 別名]
# 或者: from theano.tensor import tensor4 [as 別名]
def __init__(self,convolutional_layers,feature_maps,filter_shapes,poolsize,feedforward_layers,feedforward_nodes,classes,regularization):
        self.input = T.tensor4()
        self.convolutional_layers = []
        self.convolutional_layers.append(convolutional_layer(self.input,feature_maps[1],feature_maps[0],filter_shapes[0][0],filter_shapes[0][1],poolsize[0]))
        for i in range(1,convolutional_layers):
            self.convolutional_layers.append(convolutional_layer(self.convolutional_layers[i-1].output,feature_maps[i+1],feature_maps[i],filter_shapes[i][0],filter_shapes[i][1],poolsize[i]))
        self.feedforward_layers = []
        self.feedforward_layers.append(feedforward_layer(self.convolutional_layers[-1].output.flatten(2),flattened,feedforward_nodes[0]))
        for i in range(1,feedforward_layers):
            self.feedforward_layers.append(feedforward_layer(self.feedforward_layers[i-1].output,feedforward_nodes[i-1],feedforward_nodes[i]))
        self.output_layer = feedforward_layer(self.feedforward_layers[-1].output,feedforward_nodes[-1],classes)
        self.params = []
        for l in self.convolutional_layers + self.feedforward_layers:
            self.params.extend(l.get_params())
        self.params.extend(self.output_layer.get_params())
        self.target = T.matrix()
        self.output = self.output_layer.output
        self.cost = -self.target*T.log(self.output)-(1-self.target)*T.log(1-self.output)
        self.cost = self.cost.mean()
        for i in range(convolutional_layers+feedforward_layers+1):
            self.cost += regularization*(self.params[2*i]**2).mean()
        self.updates = self.adam(self.cost,self.params)
        self.propogate = theano.function([self.input,self.target],self.cost,updates=self.updates,allow_input_downcast=True)
        self.classify = theano.function([self.input],self.output,allow_input_downcast=True) 

# 需要導入模塊: from theano import tensor [as 別名]
# 或者: from theano.tensor import tensor4 [as 別名]
def __init__(self,convolutional_layers,feature_maps,filter_shapes,feedforward_layers,feedforward_nodes,classes):
        self.input = T.tensor4()        
        self.convolutional_layers = []
        self.convolutional_layers.append(convolutional_layer(self.input,feature_maps[1],feature_maps[0],filter_shapes[0][0],filter_shapes[0][1]))
        for i in range(1,convolutional_layers):
            if i==2 or i==4:
                self.convolutional_layers.append(convolutional_layer(self.convolutional_layers[i-1].output,feature_maps[i+1],feature_maps[i],filter_shapes[i][0],filter_shapes[i][1],maxpool=(2,2)))
            else:
                self.convolutional_layers.append(convolutional_layer(self.convolutional_layers[i-1].output,feature_maps[i+1],feature_maps[i],filter_shapes[i][0],filter_shapes[i][1]))
        self.feedforward_layers = []
        self.feedforward_layers.append(feedforward_layer(self.convolutional_layers[-1].output.flatten(2),20480,feedforward_nodes[0]))
        for i in range(1,feedforward_layers):
            self.feedforward_layers.append(feedforward_layer(self.feedforward_layers[i-1].output,feedforward_nodes[i-1],feedforward_nodes[i]))
        self.output_layer = feedforward_layer(self.feedforward_layers[-1].output,feedforward_nodes[-1],classes)
        self.params = []
        for l in self.convolutional_layers + self.feedforward_layers:
            self.params.extend(l.get_params())
        self.params.extend(self.output_layer.get_params())
        self.target = T.matrix()
        self.output = self.output_layer.output
        self.cost = -self.target*T.log(self.output)-(1-self.target)*T.log(1-self.output)
        self.cost = self.cost.mean()
        self.updates = self.adam(self.cost, self.params)
        self.propogate = theano.function([self.input,self.target],self.cost,updates=self.updates,allow_input_downcast=True)
        self.classify = theano.function([self.input],self.output,allow_input_downcast=True) 

# 需要導入模塊: from theano import tensor [as 別名]
# 或者: from theano.tensor import tensor4 [as 別名]
def __init__(self,convolutional_layers,feature_maps,filter_shapes,feedforward_layers,feedforward_nodes,classes):
        self.input = T.tensor4()        
        self.convolutional_layers = []
        self.convolutional_layers.append(convolutional_layer(self.input,feature_maps[1],feature_maps[0],filter_shapes[0][0],filter_shapes[0][1]))
        for i in range(1,convolutional_layers):
            if i==3:
                self.convolutional_layers.append(convolutional_layer(self.convolutional_layers[i-1].output,feature_maps[i+1],feature_maps[i],filter_shapes[i][0],filter_shapes[i][1],maxpool=(2,2)))
            else:
                self.convolutional_layers.append(convolutional_layer(self.convolutional_layers[i-1].output,feature_maps[i+1],feature_maps[i],filter_shapes[i][0],filter_shapes[i][1]))
        self.feedforward_layers = []
        self.feedforward_layers.append(feedforward_layer(self.convolutional_layers[-1].output.flatten(2),40000,feedforward_nodes[0]))
        for i in range(1,feedforward_layers):
            self.feedforward_layers.append(feedforward_layer(self.feedforward_layers[i-1].output,feedforward_nodes[i-1],feedforward_nodes[i]))
        self.output_layer = feedforward_layer(self.feedforward_layers[-1].output,feedforward_nodes[-1],classes)
        self.params = []
        for l in self.convolutional_layers + self.feedforward_layers:
            self.params.extend(l.get_params())
        self.params.extend(self.output_layer.get_params())
        self.target = T.matrix()
        self.output = self.output_layer.output
        self.cost = -self.target*T.log(self.output)-(1-self.target)*T.log(1-self.output)
        self.cost = self.cost.mean()
        self.updates = self.adam(self.cost, self.params)
        self.propogate = theano.function([self.input,self.target],self.cost,updates=self.updates,allow_input_downcast=True)
        self.classify = theano.function([self.input],self.output,allow_input_downcast=True) 

# 需要導入模塊: from theano import tensor [as 別名]
# 或者: from theano.tensor import tensor4 [as 別名]
def test_broadcast_grad():
    rng = numpy.random.RandomState(utt.fetch_seed())
    x1 = T.tensor4('x')
    x1_data = rng.randn(1, 1, 300, 300)
    sigma = T.scalar('sigma')
    sigma_data = 20
    window_radius = 3

    filter_1d = T.arange(-window_radius, window_radius+1)
    filter_1d = filter_1d.astype(theano.config.floatX)
    filter_1d = T.exp(-0.5*filter_1d**2/sigma**2)
    filter_1d = filter_1d / filter_1d.sum()

    filter_W = filter_1d.dimshuffle(['x', 'x', 0, 'x'])

    y = theano.tensor.nnet.conv2d(x1, filter_W, border_mode='full',
                                  filter_shape=[1, 1, None, None])
    theano.grad(y.sum(), sigma) 

# 需要導入模塊: from theano import tensor [as 別名]
# 或者: from theano.tensor import tensor4 [as 別名]
def test_max_pool_2d_2D_same_size(self):
        rng = numpy.random.RandomState(utt.fetch_seed())
        test_input_array = numpy.array([[[
            [1., 2., 3., 4.],
            [5., 6., 7., 8.]
        ]]]).astype(theano.config.floatX)
        test_answer_array = numpy.array([[[
            [0., 0., 0., 0.],
            [0., 6., 0., 8.]
        ]]]).astype(theano.config.floatX)
        input = tensor.tensor4(name='input')
        patch_size = (2, 2)
        op = max_pool_2d_same_size(input, patch_size)
        op_output = function([input], op)(test_input_array)
        utt.assert_allclose(op_output, test_answer_array)

        def mp(input):
            return max_pool_2d_same_size(input, patch_size)
        utt.verify_grad(mp, [test_input_array], rng=rng) 

# 需要導入模塊: from theano import tensor [as 別名]
# 或者: from theano.tensor import tensor4 [as 別名]
def test_conv2d(x_shape, num_filters, filter_size, flip_filters, batch_size=2):
    X_var = T.tensor4('X')
    l_x = L.InputLayer(shape=(None,) + x_shape, input_var=X_var, name='x')
    X = np.random.random((batch_size,) + x_shape).astype(theano.config.floatX)

    l_conv = L.Conv2DLayer(l_x, num_filters, filter_size=filter_size, stride=1, pad='same',
                           flip_filters=flip_filters, untie_biases=True, nonlinearity=None, b=None)
    conv_var = L.get_output(l_conv)
    conv_fn = theano.function([X_var], conv_var)
    tic()
    conv = conv_fn(X)
    toc("conv time for x_shape=%r, num_filters=%r, filter_size=%r, flip_filters=%r, batch_size=%r\n\t" %
        (x_shape, num_filters, filter_size, flip_filters, batch_size))

    tic()
    loop_conv = conv2d(X, l_conv.W.get_value(), flip_filters=flip_filters)
    toc("loop conv time for x_shape=%r, num_filters=%r, filter_size=%r, flip_filters=%r, batch_size=%r\n\t" %
        (x_shape, num_filters, filter_size, flip_filters, batch_size))

    assert np.allclose(conv, loop_conv, atol=1e-6) 

# 需要導入模塊: from theano import tensor [as 別名]
# 或者: from theano.tensor import tensor4 [as 別名]
def test_locally_connected2d(x_shape, num_filters, filter_size, flip_filters, batch_size=2):
    X_var = T.tensor4('X')
    l_x = L.InputLayer(shape=(None,) + x_shape, input_var=X_var, name='x')
    X = np.random.random((batch_size,) + x_shape).astype(theano.config.floatX)

    l_conv = LT.LocallyConnected2DLayer(l_x, num_filters, filter_size=filter_size, stride=1, pad='same',
                                        flip_filters=flip_filters, untie_biases=True, nonlinearity=None, b=None)
    conv_var = L.get_output(l_conv)
    conv_fn = theano.function([X_var], conv_var)
    tic()
    conv = conv_fn(X)
    toc("locally connected time for x_shape=%r, num_filters=%r, filter_size=%r, flip_filters=%r, batch_size=%r\n\t" %
        (x_shape, num_filters, filter_size, flip_filters, batch_size))

    tic()
    loop_conv = locally_connected2d(X, l_conv.W.get_value(), flip_filters=flip_filters)
    toc("loop locally connected time for x_shape=%r, num_filters=%r, filter_size=%r, flip_filters=%r, batch_size=%r\n\t" %
        (x_shape, num_filters, filter_size, flip_filters, batch_size))

    assert np.allclose(conv, loop_conv, atol=1e-6) 

# 需要導入模塊: from theano import tensor [as 別名]
# 或者: from theano.tensor import tensor4 [as 別名]
def test_channelwise_locally_connected2d(x_shape, filter_size, flip_filters, batch_size=2):
    X_var = T.tensor4('X')
    l_x = L.InputLayer(shape=(None,) + x_shape, input_var=X_var, name='x')
    X = np.random.random((batch_size,) + x_shape).astype(theano.config.floatX)

    l_conv = LT.LocallyConnected2DLayer(l_x, x_shape[0], filter_size=filter_size, channelwise=True,
                                        stride=1, pad='same', flip_filters=flip_filters,
                                        untie_biases=True, nonlinearity=None, b=None)
    conv_var = L.get_output(l_conv)
    conv_fn = theano.function([X_var], conv_var)
    tic()
    conv = conv_fn(X)
    toc("channelwise locally connected time for x_shape=%r, filter_size=%r, flip_filters=%r, batch_size=%r\n\t" %
        (x_shape, filter_size, flip_filters, batch_size))

    tic()
    loop_conv = channelwise_locally_connected2d(X, l_conv.W.get_value(), flip_filters=flip_filters)
    toc("loop channelwise locally connected time for x_shape=%r, filter_size=%r, flip_filters=%r, batch_size=%r\n\t" %
        (x_shape, filter_size, flip_filters, batch_size))

    assert np.allclose(conv, loop_conv, atol=1e-7) 

# 需要導入模塊: from theano import tensor [as 別名]
# 或者: from theano.tensor import tensor4 [as 別名]
def build_bilinear_net(input_shapes, X_var=None, U_var=None, X_diff_var=None, axis=1):
    x_shape, u_shape = input_shapes
    X_var = X_var or T.tensor4('X')
    U_var = U_var or T.matrix('U')
    X_diff_var = X_diff_var or T.tensor4('X_diff')
    X_next_var = X_var + X_diff_var

    l_x = L.InputLayer(shape=(None,) + x_shape, input_var=X_var)
    l_u = L.InputLayer(shape=(None,) + u_shape, input_var=U_var)

    l_x_diff_pred = LT.BilinearLayer([l_x, l_u], axis=axis)
    l_x_next_pred = L.ElemwiseMergeLayer([l_x, l_x_diff_pred], T.add)
    l_y = L.flatten(l_x)
    l_y_diff_pred = L.flatten(l_x_diff_pred)

    X_next_pred_var = lasagne.layers.get_output(l_x_next_pred)
    loss = ((X_next_var - X_next_pred_var) ** 2).mean(axis=0).sum() / 2.

    net_name = 'BilinearNet'
    input_vars = OrderedDict([(var.name, var) for var in [X_var, U_var, X_diff_var]])
    pred_layers = OrderedDict([('y_diff_pred', l_y_diff_pred), ('y', l_y), ('x0_next_pred', l_x_next_pred)])
    return net_name, input_vars, pred_layers, loss 

# 需要導入模塊: from theano import tensor [as 別名]
# 或者: from theano.tensor import tensor4 [as 別名]
def test():
    energies_var = T.tensor4('energies', dtype=theano.config.floatX)
    targets_var = T.imatrix('targets')
    masks_var = T.matrix('masks', dtype=theano.config.floatX)
    layer_input = lasagne.layers.InputLayer([2, 2, 3, 3], input_var=energies_var)
    out = lasagne.layers.get_output(layer_input)
    loss = crf_loss(out, targets_var, masks_var)
    prediction, acc = crf_accuracy(energies_var, targets_var)

    fn = theano.function([energies_var, targets_var, masks_var], [loss, prediction, acc])

    energies = np.array([[[[10, 15, 20], [5, 10, 15], [3, 2, 0]], [[5, 10, 1], [5, 10, 1], [5, 10, 1]]],
                         [[[5, 6, 7], [2, 3, 4], [2, 1, 0]], [[0, 0, 0], [0, 0, 0], [0, 0, 0]]]], dtype=np.float32)

    targets = np.array([[0, 1], [0, 2]], dtype=np.int32)

    masks = np.array([[1, 1], [1, 0]], dtype=np.float32)

    l, p, a = fn(energies, targets, masks)
    print l
    print p
    print a 

# 需要導入模塊: from theano import tensor [as 別名]
# 或者: from theano.tensor import tensor4 [as 別名]
def __init__(self):
        metric_names = ['Loss','L2','Accuracy','Dice']
        super(UNetTrainer, self).__init__(metric_names)

        input_var = T.tensor4('inputs')
        target_var = T.tensor4('targets', dtype='int64')
        weight_var = T.tensor4('weights')


        logging.info("Defining network")
        net_dict = unet.define_network(input_var)
        self.network = net_dict['out']
        train_fn, val_fn, l_r = unet.define_updates(self.network, input_var, target_var, weight_var)

        self.train_fn = train_fn
        self.val_fn = val_fn
        self.l_r = l_r 

# 需要導入模塊: from theano import tensor [as 別名]
# 或者: from theano.tensor import tensor4 [as 別名]
def __init__(self, model, algorithm, X, path, n_samples=49, **kwargs):
        """
        Generate samples from the model. The do() function is called as an extension during training.
        Generates 3 types of samples:
        - Sample from generative model
        - Sample from image denoising posterior distribution (default signal to noise of 1)
        - Sample from image inpainting posterior distribution (inpaint left half of image)
        """

        super(PlotSamples, self).__init__(**kwargs)
        self.model = model
        self.path = path
        n_samples = np.min([n_samples, X.shape[0]])
        self.X = X[:n_samples].reshape(
            (n_samples, model.n_colors, model.spatial_width, model.spatial_width))
        self.n_samples = n_samples
        X_noisy = T.tensor4('X noisy samp', dtype=theano.config.floatX)
        t = T.matrix('t samp', dtype=theano.config.floatX)
        self.get_mu_sigma = theano.function([X_noisy, t], model.get_mu_sigma(X_noisy, t),
            allow_input_downcast=True)