def process(self, ellLayers):
"""Appends the ELL equivalent of the current layer to ellLayers."""
# Note that a single CNTK Dense function block is equivalent to the following 3 ELL layers:
# - FullyConnectedLayer
# - BiasLayer
# - ActivationLayer. This layer is sometimes missing, depending on activation type.
#
# Therefore, make sure the output padding characteristics of the last layer reflect the next layer's
# padding requirements.
weightsParameter = utilities.find_parameter_by_name(
self.layer.parameters, 'W', 0)
biasParameter = utilities.find_parameter_by_name(
self.layer.parameters, 'b', 1)
weightsTensor = converters.get_float_tensor_from_cntk_dense_weight_parameter(
weightsParameter)
biasVector = converters.get_float_vector_from_cntk_trainable_parameter(
biasParameter)
# Create the ell.LayerParameters for the various ELL layers
firstLayerParameters = ell.LayerParameters(
self.layer.ell_inputShape, self.layer.ell_inputPaddingParameters, self.layer.ell_outputShapeMinusPadding, ell.NoPadding())
middleLayerParameters = ell.LayerParameters(self.layer.ell_outputShapeMinusPadding, ell.NoPadding(
), self.layer.ell_outputShapeMinusPadding, ell.NoPadding())
lastLayerParameters = ell.LayerParameters(self.layer.ell_outputShapeMinusPadding, ell.NoPadding(
), self.layer.ell_outputShape, self.layer.ell_outputPaddingParameters)
layerParameters = firstLayerParameters
internalNodes = utilities.get_model_layers(self.layer.block_root)
activationType = utilities.get_ell_activation_type(internalNodes)
# Create the ELL fully connected layer
ellLayers.append(ell.FloatFullyConnectedLayer(
layerParameters, weightsTensor))
# Create the ELL bias layer
if (utilities.is_softmax_activation(internalNodes) or activationType != None):
layerParameters = middleLayerParameters
else:
layerParameters = lastLayerParameters
ellLayers.append(ell.FloatBiasLayer(layerParameters, biasVector))
# Create the ELL activation layer
if (utilities.is_softmax_activation(internalNodes) or activationType != None):
layerParameters = lastLayerParameters
# Special case: if this is softmax activation, create an ELL Softmax layer.
# Else, insert an ELL ActivationLayer
if (utilities.is_softmax_activation(internalNodes)):
ellLayers.append(ell.FloatSoftmaxLayer(layerParameters))
else:
if (activationType != None):
ellLayers.append(ell.FloatActivationLayer(
layerParameters, activationType))
def __init__(self, layer):
if not layer.is_block:
raise ValueError(
"Error: Convolution layer node is not in block node")
self.op_name = 'Convolution'
# initialize weights and input characteristics
self.input_parameter = layer.arguments[0]
self.weights_parameter = utilities.find_parameter_by_name(
layer.parameters, 'W', 0)
self.bias_parameter = utilities.find_parameter_by_name(
layer.parameters, 'b', 1)
# Get the hyper-parameters for the convolution.
# They are on the convolution node inside this block.
convolution_nodes = depth_first_search(
layer.block_root,
lambda x: utilities.op_name_equals(x, 'Convolution'))
self.attributes = convolution_nodes[0].attributes
self.convolution_method = 0
self.input_shape = self.input_parameter.shape
super().__init__(layer)
nodes = utilities.get_model_layers(layer.block_root)
if utilities.is_softmax_activation(nodes):
self.additional_layer_text = 'softmax'
else:
activation_type = utilities.get_cntk_activation_name(nodes)
if activation_type:
self.additional_layer_text = activation_type
def __repr__(self):
"""Prints summary info about this layer."""
label = self.op_name
nodes = utilities.get_model_layers(self.layer.block_root)
if utilities.is_softmax_activation(nodes):
label += "(softmax)"
else:
activation_type = utilities.get_activation_type(nodes)
if activation_type is not None:
label += "(" + utilities.ell_activation_type_to_string(
activation_type) + ")"
return " ".join(
(label, ": ",
utilities.ell_shape_to_string(self.layer.ell_inputShape), " -> ",
utilities.ell_shape_to_string(self.layer.ell_outputShape),
"| input padding",
str(self.layer.ell_inputPaddingParameters.paddingSize),
" output padding",
str(self.layer.ell_outputPaddingParameters.paddingSize)))
def process(self, ellLayers):
"""Helper to convert a convolutional layer to the ELL equivalent."""
# Note that a single CNTK Convolutional function block is equivalent to the following 3 ELL layers:
# - ConvolutionalLayer
# - BiasLayer
# - ActivationLayer. This layer is sometimes missing, depending on activation type.
#
# Therefore, make sure the output padding characteristics of the last layer reflect the next layer's
# padding requirements.
weightsTensor = converters.get_float_tensor_from_cntk_convolutional_weight_parameter(
self.weights_parameter)
biasVector = converters.get_float_vector_from_cntk_trainable_parameter(
self.bias_parameter)
# Create the ELL.LayerParameters for the various ELL layers
firstLayerParameters = ELL.LayerParameters(
self.layer.ell_inputShape, self.layer.ell_inputPaddingParameters,
self.layer.ell_outputShapeMinusPadding, ELL.NoPadding())
middleLayerParameters = ELL.LayerParameters(
self.layer.ell_outputShapeMinusPadding, ELL.NoPadding(),
self.layer.ell_outputShapeMinusPadding, ELL.NoPadding())
lastLayerParameters = ELL.LayerParameters(
self.layer.ell_outputShapeMinusPadding, ELL.NoPadding(),
self.layer.ell_outputShape, self.layer.ell_outputPaddingParameters)
layerParameters = firstLayerParameters
# Fill in the convolutional parameters
weightsShape = self.weights_parameter.shape
receptiveField = weightsShape[2]
stride = self.attributes['strides'][2]
filterBatchSize = layerParameters.outputShape.channels
internalNodes = utilities.get_model_layers(self.layer.block_root)
activationType = utilities.get_ell_activation_type(internalNodes)
convolutionalParameters = ELL.ConvolutionalParameters(
receptiveField, stride, self.convolution_method, filterBatchSize)
# Create the ELL convolutional layer
ellLayers.append(
ELL.FloatConvolutionalLayer(layerParameters,
convolutionalParameters,
weightsTensor))
# Create the ELL bias layer
isSoftmaxActivation = utilities.is_softmax_activation(internalNodes)
hasActivation = isSoftmaxActivation or activationType != None
if (hasActivation):
layerParameters = middleLayerParameters
else:
layerParameters = lastLayerParameters
ellLayers.append(ELL.FloatBiasLayer(layerParameters, biasVector))
# Create the ELL activation layer
if (hasActivation):
layerParameters = lastLayerParameters
# Special case: if this is softmax activation, create an ELL Softmax layer.
# Else, insert an ELL ActivationLayer
if (isSoftmaxActivation):
ellLayers.append(ELL.FloatSoftmaxLayer(layerParameters))
else:
ellLayers.append(
ELL.FloatActivationLayer(layerParameters, activationType))
