DetectionPostProcessLayer Class Reference

This layer represents a detection postprocess operator. More...

#include <DetectionPostProcessLayer.hpp>

Inheritance diagram for DetectionPostProcessLayer:

Public Member Functions
virtual std::unique_ptr< IWorkload >	CreateWorkload (const IWorkloadFactory &factory) const override
	Makes a workload for the DetectionPostProcess type. More...
DetectionPostProcessLayer *	Clone (Graph &graph) const override
	Creates a dynamically-allocated copy of this layer. More...
void	ValidateTensorShapesFromInputs () override
	Check if the input tensor shape(s) will lead to a valid configuration of DetectionPostProcessLayer. More...
std::vector< TensorShape >	InferOutputShapes (const std::vector< TensorShape > &inputShapes) const override
	The model does not specify the output shapes. More...
void	ExecuteStrategy (IStrategy &strategy) const override
	Apply a visitor to this layer. More...
Public Member Functions inherited from LayerWithParameters< DetectionPostProcessDescriptor >
const DetectionPostProcessDescriptor &	GetParameters () const override
	If the layer has a descriptor return it. More...
void	SerializeLayerParameters (ParameterStringifyFunction &fn) const override
	Helper to serialize the layer parameters to string (currently used in DotSerializer and company). More...
Public Member Functions inherited from Layer
	Layer (unsigned int numInputSlots, unsigned int numOutputSlots, LayerType type, const char *name)
	Layer (unsigned int numInputSlots, unsigned int numOutputSlots, LayerType type, DataLayout layout, const char *name)
const std::string &	GetNameStr () const
const OutputHandler &	GetOutputHandler (unsigned int i=0) const
OutputHandler &	GetOutputHandler (unsigned int i=0)
ShapeInferenceMethod	GetShapeInferenceMethod () const
bool	GetAllowExpandedDims () const
const std::vector< InputSlot > &	GetInputSlots () const
const std::vector< OutputSlot > &	GetOutputSlots () const
std::vector< InputSlot >::iterator	BeginInputSlots ()
std::vector< InputSlot >::iterator	EndInputSlots ()
std::vector< OutputSlot >::iterator	BeginOutputSlots ()
std::vector< OutputSlot >::iterator	EndOutputSlots ()
bool	IsOutputUnconnected ()
void	ResetPriority () const
LayerPriority	GetPriority () const
LayerType	GetType () const override
	Returns the armnn::LayerType of this layer. More...
DataType	GetDataType () const
const BackendId &	GetBackendId () const
void	SetBackendId (const BackendId &id) override
	Set the backend of the IConnectableLayer. More...
virtual void	CreateTensorHandles (const TensorHandleFactoryRegistry &registry, const IWorkloadFactory &factory, const bool IsMemoryManaged=true)
void	VerifyLayerConnections (unsigned int expectedConnections, const CheckLocation &location) const
virtual void	ReleaseConstantData ()
template<typename Op >
void	OperateOnConstantTensors (Op op)
const char *	GetName () const override
	Returns the name of the layer. More...
unsigned int	GetNumInputSlots () const override
	Returns the number of connectable input slots. More...
unsigned int	GetNumOutputSlots () const override
	Returns the number of connectable output slots. More...
const InputSlot &	GetInputSlot (unsigned int index) const override
	Get a const input slot handle by slot index. More...
InputSlot &	GetInputSlot (unsigned int index) override
	Get the input slot handle by slot index. More...
const OutputSlot &	GetOutputSlot (unsigned int index=0) const override
	Get the const output slot handle by slot index. More...
OutputSlot &	GetOutputSlot (unsigned int index=0) override
	Get the output slot handle by slot index. More...
void	SetGuid (LayerGuid guid)
LayerGuid	GetGuid () const final
	Returns the unique id of the layer. More...
void	AddRelatedLayerName (const std::string layerName)
const std::list< std::string > &	GetRelatedLayerNames ()
virtual void	Reparent (Graph &dest, std::list< Layer * >::const_iterator iterator)=0
void	BackendSelectionHint (Optional< BackendId > backend) final
	Provide a hint for the optimizer as to which backend to prefer for this layer. More...
Optional< BackendId >	GetBackendHint () const
void	SetShapeInferenceMethod (ShapeInferenceMethod shapeInferenceMethod)
void	SetAllowExpandedDims (bool allowExpandedDims)
template<typename T >
std::shared_ptr< T >	GetAdditionalInformation () const
void	SetAdditionalInfoForObject (const AdditionalInfoObjectPtr &additionalInfo)
virtual const BaseDescriptor &	GetParameters () const override
	If the layer has a descriptor return it. More...

Public Attributes
std::shared_ptr< ConstTensorHandle >	m_Anchors
	A unique pointer to store Anchor values. More...

Protected Member Functions
	DetectionPostProcessLayer (const DetectionPostProcessDescriptor &param, const char *name)
	Constructor to create a DetectionPostProcessLayer. More...
	~DetectionPostProcessLayer ()=default
	Default destructor. More...
ConstantTensors	GetConstantTensorsByRef () override
	Retrieve the handles to the constant values stored by the layer. More...
Protected Member Functions inherited from LayerWithParameters< DetectionPostProcessDescriptor >
	LayerWithParameters (unsigned int numInputSlots, unsigned int numOutputSlots, LayerType type, const DetectionPostProcessDescriptor &param, const char *name)
	~LayerWithParameters ()=default
WorkloadInfo	PrepInfoAndDesc (QueueDescriptor &descriptor) const
	Helper function to reduce duplication in *Layer::CreateWorkload. More...
void	ExecuteStrategy (IStrategy &strategy) const override
	Apply a visitor to this layer. More...
Layer::ConstantTensors	GetConnectedConstantAsInputTensors ()
Protected Member Functions inherited from Layer
virtual	~Layer ()=default
template<typename QueueDescriptor >
void	CollectQueueDescriptorInputs (QueueDescriptor &descriptor, WorkloadInfo &info) const
template<typename QueueDescriptor >
void	CollectQueueDescriptorOutputs (QueueDescriptor &descriptor, WorkloadInfo &info) const
void	ValidateAndCopyShape (const TensorShape &outputShape, const TensorShape &inferredShape, const ShapeInferenceMethod shapeInferenceMethod, const std::string &layerName, const unsigned int outputSlotIndex=0)
void	VerifyShapeInferenceType (const TensorShape &outputShape, ShapeInferenceMethod shapeInferenceMethod)
template<typename QueueDescriptor >
WorkloadInfo	PrepInfoAndDesc (QueueDescriptor &descriptor) const
	Helper function to reduce duplication in *Layer::CreateWorkload. More...
template<typename LayerType , typename ... Params>
LayerType *	CloneBase (Graph &graph, Params &&... params) const
void	SetAdditionalInfo (QueueDescriptor &descriptor) const
Protected Member Functions inherited from IConnectableLayer
	~IConnectableLayer ()
	Objects are not deletable via the handle. More...

Additional Inherited Members
Public Types inherited from LayerWithParameters< DetectionPostProcessDescriptor >
using	DescriptorType = DetectionPostProcessDescriptor
Public Types inherited from IConnectableLayer
using	ConstantTensors = std::vector< std::reference_wrapper< std::shared_ptr< ConstTensorHandle > >>
Protected Attributes inherited from LayerWithParameters< DetectionPostProcessDescriptor >
DetectionPostProcessDescriptor	m_Param
	The parameters for the layer (not including tensor-valued weights etc.). More...
Protected Attributes inherited from Layer
AdditionalInfoObjectPtr	m_AdditionalInfoObject
std::vector< OutputHandler >	m_OutputHandlers
ShapeInferenceMethod	m_ShapeInferenceMethod

Detailed Description

This layer represents a detection postprocess operator.

Definition at line 16 of file DetectionPostProcessLayer.hpp.

Constructor & Destructor Documentation

DetectionPostProcessLayer()

DetectionPostProcessLayer ( const DetectionPostProcessDescriptor &  param, const char *  name  )

protected

Constructor to create a DetectionPostProcessLayer.

Parameters

[in]	param	DetectionPostProcessDescriptor to configure the detection postprocess.
[in]	name	Optional name for the layer.

Definition at line 18 of file DetectionPostProcessLayer.cpp.

    : LayerWithParameters(2, 4, LayerType::DetectionPostProcess, param, name)
{
}

~DetectionPostProcessLayer()

~DetectionPostProcessLayer ( )

protecteddefault

Default destructor.

Member Function Documentation

Clone()

DetectionPostProcessLayer * Clone ( Graph &  graph ) const

overridevirtual

Creates a dynamically-allocated copy of this layer.

Parameters

[in]

graph

The graph into which this layer is being cloned.

Implements Layer.

Definition at line 32 of file DetectionPostProcessLayer.cpp.

{
    auto layer = CloneBase<DetectionPostProcessLayer>(graph, m_Param, GetName());
    layer->m_Anchors = m_Anchors ? m_Anchors : nullptr;
    return std::move(layer);
}

References Layer::GetName(), DetectionPostProcessLayer::m_Anchors, and LayerWithParameters< DetectionPostProcessDescriptor >::m_Param.

CreateWorkload()

std::unique_ptr< IWorkload > CreateWorkload ( const IWorkloadFactory &  factory ) const

overridevirtual

Makes a workload for the DetectionPostProcess type.

Parameters

[in]	graph	The graph where this layer can be found.
[in]	factory	The workload factory which will create the workload.

Returns

A pointer to the created workload, or nullptr if not created.

Implements Layer.

Definition at line 23 of file DetectionPostProcessLayer.cpp.

{
    DetectionPostProcessQueueDescriptor descriptor;
    descriptor.m_Anchors = m_Anchors.get();
    SetAdditionalInfo(descriptor);
 
    return factory.CreateWorkload(LayerType::DetectionPostProcess, descriptor, PrepInfoAndDesc(descriptor));
}

References IWorkloadFactory::CreateWorkload(), armnn::DetectionPostProcess, DetectionPostProcessLayer::m_Anchors, DetectionPostProcessQueueDescriptor::m_Anchors, LayerWithParameters< DetectionPostProcessDescriptor >::PrepInfoAndDesc(), and Layer::SetAdditionalInfo().

ExecuteStrategy()

void ExecuteStrategy ( IStrategy &  strategy ) const

overridevirtual

Apply a visitor to this layer.

Reimplemented from Layer.

Definition at line 98 of file DetectionPostProcessLayer.cpp.

{
    ManagedConstTensorHandle managedAnchors(m_Anchors);
    std::vector<armnn::ConstTensor> constTensors { {managedAnchors.GetTensorInfo(), managedAnchors.Map()} };
    strategy.ExecuteStrategy(this, GetParameters(), constTensors, GetName());
}

References IStrategy::ExecuteStrategy(), Layer::GetName(), LayerWithParameters< DetectionPostProcessDescriptor >::GetParameters(), ManagedConstTensorHandle::GetTensorInfo(), DetectionPostProcessLayer::m_Anchors, and ManagedConstTensorHandle::Map().

GetConstantTensorsByRef()

Layer::ConstantTensors GetConstantTensorsByRef ( )

overrideprotectedvirtual

Retrieve the handles to the constant values stored by the layer.

Returns

A vector of the constant tensors stored by this layer.

Reimplemented from Layer.

Definition at line 92 of file DetectionPostProcessLayer.cpp.

{
    // For API stability DO NOT ALTER order and add new members to the end of vector
    return { m_Anchors };
}

References DetectionPostProcessLayer::m_Anchors.

InferOutputShapes()

std::vector< TensorShape > InferOutputShapes ( const std::vector< TensorShape > &  inputShapes ) const

overridevirtual

The model does not specify the output shapes.

The output shapes are calculated from the max_detection and max_classes_per_detection parameters in the DetectionPostProcessDescriptor.

Parameters

[in]

inputShapes

The input shapes layer has. These are ignored for DetectionPostProcessLayer.

Returns

A vector to the inferred output shape.

Reimplemented from Layer.

Definition at line 80 of file DetectionPostProcessLayer.cpp.

{
    unsigned int detectedBoxes = m_Param.m_MaxDetections * m_Param.m_MaxClassesPerDetection;
 
    std::vector<TensorShape> results;
    results.push_back({ 1, detectedBoxes, 4 });
    results.push_back({ 1, detectedBoxes });
    results.push_back({ 1, detectedBoxes });
    results.push_back({ 1 });
    return results;
}

References DetectionPostProcessDescriptor::m_MaxClassesPerDetection, DetectionPostProcessDescriptor::m_MaxDetections, and LayerWithParameters< DetectionPostProcessDescriptor >::m_Param.

Referenced by DetectionPostProcessLayer::ValidateTensorShapesFromInputs().

ValidateTensorShapesFromInputs()

void ValidateTensorShapesFromInputs ( )

overridevirtual

Check if the input tensor shape(s) will lead to a valid configuration of DetectionPostProcessLayer.

Parameters

[in]

shapeInferenceMethod

Indicates if output shape shall be overwritten or just validated.

Implements Layer.

Definition at line 39 of file DetectionPostProcessLayer.cpp.

{
    VerifyLayerConnections(2, CHECK_LOCATION());
 
    const TensorShape& outputShape = GetOutputSlot(0).GetTensorInfo().GetShape();
 
    VerifyShapeInferenceType(outputShape, m_ShapeInferenceMethod);
 
    // on this level constant data should not be released.
    ARMNN_ASSERT_MSG(m_Anchors != nullptr, "DetectionPostProcessLayer: Anchors data should not be null.");
 
    ARMNN_ASSERT_MSG(GetNumOutputSlots() == 4, "DetectionPostProcessLayer: The layer should return 4 outputs.");
 
    std::vector<TensorShape> inferredShapes = InferOutputShapes(
            { GetInputSlot(0).GetConnection()->GetTensorInfo().GetShape(),
              GetInputSlot(1).GetConnection()->GetTensorInfo().GetShape() });
 
    ARMNN_ASSERT(inferredShapes.size() == 4);
    ARMNN_ASSERT(inferredShapes[0].GetDimensionality() == Dimensionality::Specified);
    ARMNN_ASSERT(inferredShapes[1].GetDimensionality() == Dimensionality::Specified);
    ARMNN_ASSERT(inferredShapes[2].GetDimensionality() == Dimensionality::Specified);
    ARMNN_ASSERT(inferredShapes[3].GetDimensionality() == Dimensionality::Specified);
 
    ValidateAndCopyShape(outputShape, inferredShapes[0], m_ShapeInferenceMethod, "DetectionPostProcessLayer");
 
    ValidateAndCopyShape(GetOutputSlot(1).GetTensorInfo().GetShape(),
                         inferredShapes[1],
                         m_ShapeInferenceMethod,
                         "DetectionPostProcessLayer", 1);
 
    ValidateAndCopyShape(GetOutputSlot(2).GetTensorInfo().GetShape(),
                         inferredShapes[2],
                         m_ShapeInferenceMethod,
                         "DetectionPostProcessLayer", 2);
 
    ValidateAndCopyShape(GetOutputSlot(3).GetTensorInfo().GetShape(),
                         inferredShapes[3],
                         m_ShapeInferenceMethod,
                         "DetectionPostProcessLayer", 3);
}

References ARMNN_ASSERT, ARMNN_ASSERT_MSG, CHECK_LOCATION, InputSlot::GetConnection(), Layer::GetInputSlot(), Layer::GetNumOutputSlots(), Layer::GetOutputSlot(), TensorInfo::GetShape(), armnn::GetTensorInfo(), IOutputSlot::GetTensorInfo(), OutputSlot::GetTensorInfo(), DetectionPostProcessLayer::InferOutputShapes(), DetectionPostProcessLayer::m_Anchors, Layer::m_ShapeInferenceMethod, armnn::Specified, Layer::ValidateAndCopyShape(), Layer::VerifyLayerConnections(), and Layer::VerifyShapeInferenceType().

Member Data Documentation

m_Anchors

std::shared_ptr<ConstTensorHandle> m_Anchors

A unique pointer to store Anchor values.

Definition at line 20 of file DetectionPostProcessLayer.hpp.

Referenced by NetworkImpl::AddDetectionPostProcessLayer(), DetectionPostProcessLayer::Clone(), DetectionPostProcessLayer::CreateWorkload(), DetectionPostProcessLayer::ExecuteStrategy(), DetectionPostProcessLayer::GetConstantTensorsByRef(), and DetectionPostProcessLayer::ValidateTensorShapesFromInputs().

---

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

• src/armnn/layers/DetectionPostProcessLayer.hpp
• src/armnn/layers/DetectionPostProcessLayer.cpp