The SigmoidLayer is a neuron layer that calculates the sigmoid function, a classc choice for neural networks. This layer is initialized with the MyCaffe.param.SigmoidParameter. More...

Inheritance diagram for MyCaffe.layers.SigmoidLayer< T >:

Public Member Functions
	SigmoidLayer (CudaDnn< T > cuda, Log log, LayerParameter p)
	The SigmoidLayer constructor. More...

override void	LayerSetUp (BlobCollection< T > colBottom, BlobCollection< T > colTop)
	Setup the layer to run in either Engine.CAFFE or Engine.CUDNN mode. More...

override void	Reshape (BlobCollection< T > colBottom, BlobCollection< T > colTop)
	Reshape the bottom (input) and top (output) blobs. More...

Public Member Functions inherited from MyCaffe.layers.NeuronLayer< T >
	NeuronLayer (CudaDnn< T > cuda, Log log, LayerParameter p)
	The NeuronLayer constructor. More...

Public Member Functions inherited from MyCaffe.layers.Layer< T >
	Layer (CudaDnn< T > cuda, Log log, LayerParameter p)
	The Layer constructor. More...

void	Dispose ()
	Releases all GPU and host resources used by the Layer. More...

virtual void	ConnectLoss (LossLayer< T > layer)
	Called to connect the loss OnLoss event to a specified layer (typically the data layer). More...

virtual BlobCollection< T >	PreProcessInput (PropertySet customInput, out int nSeqLen, BlobCollection< T > colBottom=null)
	The PreprocessInput allows derivative data layers to convert a property set of input data into the bottom blob collection used as intput. More...

virtual bool	PreProcessInput (string strEncInput, int? nDecInput, BlobCollection< T > colBottom)
	Preprocess the input data for the RUN phase. More...

virtual List< Tuple< string, int, double > >	PostProcessOutput (Blob< T > blobSofmtax, int nK=1)
	The PostProcessOutput allows derivative data layers to post-process the results, converting them back into text results (e.g., detokenizing). More...

virtual List< Tuple< string, int, double > >	PostProcessLogitsOutput (int nCurIdx, Blob< T > blobLogits, Layer< T > softmax, int nAxis, int nK=1)
	The PostProcessLogitsOutput allows derivative data layers to post-process the results, converting them back into text results (e.g., detokenizing). More...

virtual string	PostProcessFullOutput (Blob< T > blobSoftmax)
	The PostProcessFullOutput allows derivative data layers to post-process the results, usually be detokenizing the data in the blobSoftmax. More...

virtual string	PostProcessOutput (int nIdx)
	Convert the index to the word. More...

virtual void	SetOnDebug (EventHandler< GetWorkBlobArgs< T > > fn)
	Set the OnDebug event. More...

virtual void	ResetOnDebug (EventHandler< GetWorkBlobArgs< T > > fn)
	Reset the OnDebug event, disabling it. More...

virtual bool	ReInitializeParameters (WEIGHT_TARGET target)
	Re-initialize the parameters of the layer. More...

void	SetNetReshapeRequest ()
	Called by the Net when requesting a reshape. More...

void	SetPhase (Phase phase)
	Changes the layer's Phase to the one specified. More...

void	Setup (BlobCollection< T > colBottom, BlobCollection< T > colTop)
	Implements common Layer setup functionality. More...

virtual void	SetNetParameterUsed (NetParameter np)
	This function allows other layers to gather needed information from the NetParameters if any, and is called when initialzing the Net. More...

void	ConvertToBase (BlobCollection< T > col)
	ConvertToBase converts any blobs in a collection that are in half size to the base size. More...

double	Forward (BlobCollection< T > colBottom, BlobCollection< T > colTop)
	Given the bottom (input) Blobs, this function computes the top (output) Blobs and the loss. More...

void	Backward (BlobCollection< T > colTop, List< bool > rgbPropagateDown, BlobCollection< T > colBottom)
	Given the top Blob error gradients, compute the bottom Blob error gradients. More...

double	loss (int nTopIdx)
	Returns the scalar loss associated with the top Blob at a given index. More...

void	set_loss (int nTopIdx, double dfLoss)
	Sets the loss associated with a top Blob at a given index. More...

virtual bool	AllowForceBackward (int nBottomIdx)
	Return whether to allow More...

bool	param_propagate_down (int nParamIdx)
	Returns whether or not the Layer should compute gradients w.r.t. a parameter at a particular index given by a parameter index. More...

void	set_param_propagate_down (int nParamIdx, bool bPropagate)
	Sets whether or not the Layer should compute gradients w.r.t. a parameter at a particular index given by a parameter index. More...

void	SetEnablePassthrough (bool bEnable)
	Enables/disables the pass-through mode. More...

Protected Member Functions
override void	dispose ()
	Releases all GPU and host resources used by the Layer. More...

override void	forward (BlobCollection< T > colBottom, BlobCollection< T > colTop)
	Computes the forward calculation using either the Engine.CAFFE or Engine.CUDNN mode. More...

override void	backward (BlobCollection< T > colTop, List< bool > rgbPropagateDown, BlobCollection< T > colBottom)
	Computes the error gradient w.r.t the ganh inputs using either the Engine.CAFFE or Engine.CUDNN mode. More...

void	forward_cuda (BlobCollection< T > colBottom, BlobCollection< T > colTop)
	Computes the forward calculation using the Engine.CAFFE. More...

void	backward_cuda (BlobCollection< T > colTop, List< bool > rgbPropagateDown, BlobCollection< T > colBottom)
	Computes the error gradient w.r.t the ganh inputs using the Engine.CAFFE. More...

void	forward_cudnn (BlobCollection< T > colBottom, BlobCollection< T > colTop)
	Computes the forward calculation using the Engine.CUDNN mode. More...

void	backward_cudnn (BlobCollection< T > colTop, List< bool > rgbPropagateDown, BlobCollection< T > colBottom)
	Computes the error gradient w.r.t the ganh inputs using the Engine.CUDNN mode. More...

Protected Member Functions inherited from MyCaffe.layers.Layer< T >
void	dispose (ref Layer< T > l)
	Helper method used to dispose internal layers. More...

void	dispose (ref Blob< T > b)
	Helper method used to dispose internal blobs. More...

void	dispose (ref BlobCollection< T > rg, bool bSetToNull=true)
	Dispose the blob collection. More...

GetIterationArgs	getCurrentIteration ()
	Fires the OnGetIteration event to query the current iteration. More...

long	convert_to_full (int nCount, long hMem)
	Convert half memory to full memory. More...

void	convert (BlobCollection< T > col)
	Convert a collection of blobs from / to half size. More...

virtual bool	reshapeNeeded (BlobCollection< T > colBottom, BlobCollection< T > colTop, bool bReset=true)
	Tests the shapes of both the bottom and top blobs and if they are the same as the previous sizing, returns false indicating that no reshape is needed. More...

bool	compareShapes (BlobCollection< T > colBottom, BlobCollection< T > colTop)
	Compare the shapes of the top and bottom and if the same, return true, otherwise false. More...

void	setShapes (BlobCollection< T > colBottom, BlobCollection< T > colTop)
	Set the internal shape sizes - used when determining if a Reshape is necessary. More...

virtual void	setup_internal_blobs (BlobCollection< T > col)
	Derivative layers should add all internal blobws to the 'col' provided. More...

void	CheckBlobCounts (BlobCollection< T > colBottom, BlobCollection< T > colTop)
	Called by the Layer::Setup function to check the number of bottom (input) and top (output) Blobs provided match the expected number of blobs expected via the {EactNum,Min,Max}{Bottom,Top}Blobs functions. More...

void	SetLossWeights (BlobCollection< T > colTop)
	Called by Layer::Setup to initialize the weights associated with any top (output) Blobs in the loss function ans store non-zero loss weights in the diff Blob. More...

LayerParameter	convertLayerParam (LayerParameter pChild, LayerParameter pParent)
	Called to convert a parent LayerParameterEx, used in blob sharing, with a child layer parameter. More...

bool	shareParameter (Blob< T > b, List< int > rgMinShape, bool bAllowEndsWithComparison=false)
	Attempts to share a parameter Blob if another parameter Blob with the same name and accpetable size is found. More...

bool	shareLayerBlob (Blob< T > b, List< int > rgMinShape)
	Attempts to share a Layer Blob if another parameter Blob with the same name and acceptable size is found. More...

bool	shareLayerBlobs (Layer< T > layer)
	Attempts to share the Layer blobs and internal_blobs with matching names and sizes with those in another matching layer. More...

virtual WorkspaceArgs	getWorkspace ()
	Returns the WorkspaceArgs used to share a workspace between Layers. More...

virtual bool	setWorkspace (ulong lSizeInBytes)
	Sets the workspace size (in items) and returns true if set, false otherwise. More...

void	check_nan (Blob< T > b)
	Checks a Blob for NaNs and throws an exception if found. More...

T	convert (double df)
	Converts a double to a generic. More...

T	convert (float f)
	Converts a float to a generic. More...

double	convertD (T df)
	Converts a generic to a double value. More...

float	convertF (T df)
	Converts a generic to a float value. More...

double[]	convertD (T[] rg)
	Converts an array of generic values into an array of double values. More...

T[]	convert (double[] rg)
	Converts an array of double values into an array of generic values. More...

float[]	convertF (T[] rg)
	Converts an array of float values into an array of generic values. More...

T[]	convert (float[] rg)
	Converts an array of float values into an array of generic values. More...

int	val_at (T[] rg, int nIdx)
	Returns the integer value at a given index in a generic array. More...

Size	size_at (Blob< T > b)
	Returns the Size of a given two element Blob, such as one that stores Blob size information. More...

Additional Inherited Members
Static Public Member Functions inherited from MyCaffe.layers.Layer< T >
static Layer< T >	Create (CudaDnn< T > cuda, Log log, LayerParameter p, CancelEvent evtCancel, IXDatabaseBase db=null, TransferInput trxinput=null)
	Create a new Layer based on the LayerParameter. More...

Protected Attributes inherited from MyCaffe.layers.Layer< T >
LayerParameter.LayerType	m_type = LayerParameter.LayerType._MAX
	Specifies the Layer type. More...

CudaDnn< T >	m_cuda
	Specifies the CudaDnn connection to Cuda. More...

Log	m_log
	Specifies the Log for output. More...

LayerParameter	m_param
	Specifies the LayerParameter describing the Layer. More...

Phase	m_phase
	Specifies the Phase under which the Layer is run. More...

BlobCollection< T >	m_colBlobs
	Specifies the learnable parameter Blobs of the Layer. More...

BlobCollection< T >	m_colInternalBlobs = new BlobCollection<T>()
	Specifies internal blobs used by the layer. More...

DictionaryMap< bool >	m_rgbParamPropagateDown
	Specifies whether or not to compute the learnable diff of each parameter Blob. More...

DictionaryMap< double >	m_rgLoss
	Specifies the loss values that indeicate whether each top (output) Blob has a non-zero weight in the objective function.. More...

T	m_tOne
	Specifies a generic type equal to 1.0. More...

T	m_tZero
	Specifies a generic type equal to 0.0. More...

bool	m_bEnablePassthrough = false
	Enables/disables the pass-through mode for the layer. Default = false. More...

bool	m_bUseHalfSize = false
	Specifies that the half size of the top (if any) should be converted to the base size. More...

bool	m_bConvertTopOnFwd = false
	Specifies whether or not the layer should convert the top on the forward pass when using half sized memory (typically only done with input data). More...

bool	m_bConvertTopOnBwd = true
	Specifies whether or not to convert the top on the backward pass when using half sized memory (typically not done on loss layers). More...

bool	m_bConvertBottom = true
	Specifies whether or not the layer should convert the bottom when using half sized memory. More...

bool	m_bReshapeOnForwardNeeded = true
	Specifies whether or not the reshape on forward is needed or not. More...

bool	m_bNetReshapeRequest = false
	Specifies whether the reshape is requested from a Net.Reshape call or not. More...

LayerParameter.? LayerType	m_parentLayerType = null
	Specifies the layer type of the parent. More...

Properties inherited from MyCaffe.layers.NeuronLayer< T >
override int	ExactNumBottomBlobs `[get]`
	Returns the exact number of required bottom (input) Blobs: input. More...

override int	ExactNumTopBlobs `[get]`
	Returns the exact number of required top (output) Blobs: output. More...

Properties inherited from MyCaffe.layers.Layer< T >
LayerParameter.? LayerType	parent_layer_type `[get]`
	Optionally, specifies the parent layer type (e.g. LOSS, etc.) More...

virtual bool	SupportsPreProcessing `[get]`
	Should return true when PreProcessing methods are overriden. More...

virtual bool	SupportsPostProcessing `[get]`
	Should return true when pre PostProcessing methods are overriden. More...

virtual bool	SupportsPostProcessingLogits `[get]`
	Should return true when pre PostProcessingLogits methods are overriden. More...

virtual bool	SupportsPostProcessingFullOutput `[get]`
	Should return true when PostProcessingFullOutput is supported. More...

BlobCollection< T >	blobs `[get]`
	Returns the collection of learnable parameter Blobs for the Layer. More...

BlobCollection< T >	internal_blobs `[get]`
	Returns the collection of internal Blobs used by the Layer. More...

LayerParameter	layer_param `[get]`
	Returns the LayerParameter for this Layer. More...

LayerParameter.LayerType	type `[get]`
	Returns the LayerType of this Layer. More...

virtual int	ExactNumBottomBlobs `[get]`
	Returns the exact number of bottom (input) Blobs required by the Layer, or -1 if no exact number is required. More...

virtual int	MinBottomBlobs `[get]`
	Returns the minimum number of bottom (input) Blobs required by the Layer, or -1 if no minimum number is required. More...

virtual int	MaxBottomBlobs `[get]`
	Returns the maximum number of bottom (input) Blobs required by the Layer, or -1 if no maximum number is required. More...

virtual int	ExactNumTopBlobs `[get]`
	Returns the exact number of top (output) Blobs required by the Layer, or -1 if no exact number is required. More...

virtual int	MinTopBlobs `[get]`
	Returns the minimum number of top (output) Blobs required by the Layer, or -1 if no minimum number is required. More...

virtual int	MaxTopBlobs `[get]`
	Returns the maximum number of top (output) Blobs required by the Layer, or -1 if no maximum number is required. More...

virtual bool	EqualNumBottomTopBlobs `[get]`
	Returns true if the Layer requires and equal number of bottom (input) and top (output) Blobs. More...

virtual bool	AutoTopBlobs `[get]`
	Return whether "anonymous" top (output) Blobs are created automatically by the Layer. More...

double	forward_timing `[get]`
	Returns the timing of the last forward pass in milliseconds. More...

double	forward_timing_average `[get]`
	Returns the average timing of the forward passes in milliseconds. More...

double	backward_timing `[get]`
	Returns the timing of the last backward pass in milliseconds. More...

double	backward_timing_average `[get]`
	Returns the average timing of the backward passes in milliseconds. More...

Events inherited from MyCaffe.layers.Layer< T >
EventHandler< WorkspaceArgs >	OnGetWorkspace
	Specifies the OnGetWorkspace event that fires when the getWorkspace() function is called by a layer to get a shareable workspace to conserve GPU memory. More...

EventHandler< WorkspaceArgs >	OnSetWorkspace
	Specifies the OnSetWorkspace event that fires when the setWorkspace() function is called by a layer to get a shareable workspace to conserve GPU memory. More...

EventHandler< GetIterationArgs >	OnGetIteration
	Specifies the OnGetIteration event that fires when a layer needs to get the current iteration from the solver. More...

EventHandler< GetWorkBlobArgs< T > >	OnDebug
	Specifies the OnGetWorkBlob event that is only supported when debugging to get a work blob from the primary Net holding this layer. More...

Detailed Description

The SigmoidLayer is a neuron layer that calculates the sigmoid function, a classc choice for neural networks. This layer is initialized with the MyCaffe.param.SigmoidParameter.

Computation: $y = (1 + \exp(-x))^{-1}$
Note that the gradient vanishes as the values move away from 0. The ReLULayer is often a better choice for this reason.

See also: eXpose: A Character-Level Convolutional Neural Network with Embeddings For Detecting Malicious URLs, File Paths and Registry Keys by Joshua Saxe and Konstantin Berlin, 2017.; Residual Attention Network for Image Classification by Fei Wang, Mengquing Jiang, Chen Qian, Shuo Yang, Cheng Li, Honggang Zhang, Xiaogang Wang, and Xiaoou Tang, 2017.; Attention and Localization based on a Deep Convolutional Recurrent Model for Weakly Supervised Audio Tagging by Yong Xu, Qiuqiang Kong, Qiang Huang, Wenwu Wang, and Mark D. Plumbley, 2017.

Template Parameters

T	Specifies the base type float or double. Using float is recommended to conserve GPU memory.

Definition at line 27 of file SigmoidLayer.cs.

Constructor & Destructor Documentation

◆ SigmoidLayer()

MyCaffe.layers.SigmoidLayer< T >.SigmoidLayer	(	CudaDnn< T >	cuda,
		Log	log,
		LayerParameter	p
	)

The SigmoidLayer constructor.

Parameters

cuda	Specifies the CudaDnn connection to Cuda.
log	Specifies the Log for output.
p	Specifies the LayerParameter of type SIGMOID with parameter sigmoid_param, with options: engine. The engine to use, either Engine.CAFFE, or Engine.CUDNN.

Definition at line 42 of file SigmoidLayer.cs.

Member Function Documentation

◆ backward()

override void MyCaffe.layers.SigmoidLayer< T >.backward	(	BlobCollection< T >	colTop,
		List< bool >	rgbPropagateDown,
		BlobCollection< T >	colBottom
	)

protectedvirtual

Computes the error gradient w.r.t the ganh inputs using either the Engine.CAFFE or Engine.CUDNN mode.

Parameters

colTop	top output Blob vector (Length 1), providing the error gradient with respect to computed outputs. $(N \times C \times H \times W)$ containing error gradients $\frac{\partial E}{\partial y}$ with respect to computed outputs (y).
rgbPropagateDown	propagate down see Layer::Backward
colBottom	bottom input Blob vector (Length 1) $(N \times C \times H \times W)$ the inputs ; Backward fills their diff with gradients $\frac{\partial E}{\partial y} = \frac{\partial E}{\partial y} y (1 - y)$ if propagate_down[0] == true

Implements MyCaffe.layers.Layer< T >.

Definition at line 149 of file SigmoidLayer.cs.

◆ backward_cuda()

void MyCaffe.layers.SigmoidLayer< T >.backward_cuda	(	BlobCollection< T >	colTop,
		List< bool >	rgbPropagateDown,
		BlobCollection< T >	colBottom
	)

protected

Computes the error gradient w.r.t the ganh inputs using the Engine.CAFFE.

Parameters

colTop	top output Blob vector (Length 1), providing the error gradient with respect to computed outputs. $(N \times C \times H \times W)$ containing error gradients $\frac{\partial E}{\partial y}$ with respect to computed outputs (y).
rgbPropagateDown	propagate down see Layer::Backward
colBottom	bottom input Blob vector (Length 1) $(N \times C \times H \times W)$ the inputs ; Backward fills their diff with gradients $\frac{\partial E}{\partial y} = \frac{\partial E}{\partial y} y (1 - y)$ if propagate_down[0] == true

Definition at line 193 of file SigmoidLayer.cs.

◆ backward_cudnn()

void MyCaffe.layers.SigmoidLayer< T >.backward_cudnn	(	BlobCollection< T >	colTop,
		List< bool >	rgbPropagateDown,
		BlobCollection< T >	colBottom
	)

protected

Computes the error gradient w.r.t the ganh inputs using the Engine.CUDNN mode.

Parameters

colTop	top output Blob vector (Length 1), providing the error gradient with respect to computed outputs. $(N \times C \times H \times W)$ containing error gradients $\frac{\partial E}{\partial y}$ with respect to computed outputs (y).
rgbPropagateDown	propagate down see Layer::Backward
colBottom	bottom input Blob vector (Length 1) $(N \times C \times H \times W)$ the inputs ; Backward fills their diff with gradients $\frac{\partial E}{\partial y} = \frac{\partial E}{\partial y} y (1 - y)$ if propagate_down[0] == true

Definition at line 238 of file SigmoidLayer.cs.

◆ dispose()

override void MyCaffe.layers.SigmoidLayer< T >.dispose ( )

protectedvirtual

Releases all GPU and host resources used by the Layer.

Reimplemented from MyCaffe.layers.Layer< T >.

Definition at line 49 of file SigmoidLayer.cs.

◆ forward()

override void MyCaffe.layers.SigmoidLayer< T >.forward	(	BlobCollection< T >	colBottom,
		BlobCollection< T >	colTop
	)

protectedvirtual

Computes the forward calculation using either the Engine.CAFFE or Engine.CUDNN mode.

Parameters

colBottom	bottom input Blob vector (Length 1) $(N \times C \times H \times W)$ the inputs.
colTop	top otuput Blob vector (Length 1) $(N \times C \times H \times W)$ the computed outputs $y = (1 + \exp(-x))^{-1}$

Implements MyCaffe.layers.Layer< T >.

Definition at line 124 of file SigmoidLayer.cs.

◆ forward_cuda()

void MyCaffe.layers.SigmoidLayer< T >.forward_cuda	(	BlobCollection< T >	colBottom,
		BlobCollection< T >	colTop
	)

protected

Computes the forward calculation using the Engine.CAFFE.

Parameters

colBottom	bottom input Blob vector (Length 1) $(N \times C \times H \times W)$ the inputs.
colTop	top otuput Blob vector (Length 1) $(N \times C \times H \times W)$ the computed outputs $y = (1 + \exp(-x))^{-1}$

Definition at line 167 of file SigmoidLayer.cs.

◆ forward_cudnn()

void MyCaffe.layers.SigmoidLayer< T >.forward_cudnn	(	BlobCollection< T >	colBottom,
		BlobCollection< T >	colTop
	)

protected

Computes the forward calculation using the Engine.CUDNN mode.

Parameters

colBottom	bottom input Blob vector (Length 1) $(N \times C \times H \times W)$ the inputs.
colTop	top otuput Blob vector (Length 1) $(N \times C \times H \times W)$ the computed outputs $y = (1 + \exp(-x))^{-1}$

Definition at line 213 of file SigmoidLayer.cs.

◆ LayerSetUp()

override void MyCaffe.layers.SigmoidLayer< T >.LayerSetUp	(	BlobCollection< T >	colBottom,
		BlobCollection< T >	colTop
	)

virtual

Setup the layer to run in either Engine.CAFFE or Engine.CUDNN mode.

Parameters

colBottom	Specifies the collection of bottom (input) Blobs.
colTop	Specifies the collection of top (output) Blobs.

Reimplemented from MyCaffe.layers.NeuronLayer< T >.

Definition at line 77 of file SigmoidLayer.cs.

◆ Reshape()

override void MyCaffe.layers.SigmoidLayer< T >.Reshape	(	BlobCollection< T >	colBottom,
		BlobCollection< T >	colTop
	)

virtual

Reshape the bottom (input) and top (output) blobs.

Parameters

colBottom	Specifies the collection of bottom (input) Blobs.
colTop	Specifies the collection of top (output) Blobs.

Reimplemented from MyCaffe.layers.NeuronLayer< T >.

Definition at line 96 of file SigmoidLayer.cs.

The documentation for this class was generated from the following file:

C:/Data/Data/SS_Projects/Intelligence/GitHub/MyCaffe/MyCaffe/layers/SigmoidLayer.cs

Public Member Functions

Protected Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ SigmoidLayer()

Member Function Documentation

◆ backward()

◆ backward_cuda()

◆ backward_cudnn()

◆ dispose()

◆ forward()

◆ forward_cuda()

◆ forward_cudnn()

◆ LayerSetUp()

◆ Reshape()