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/*=========================================================================
*
* Copyright Insight Software Consortium
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0.txt
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*=========================================================================*/
#ifndef itkShapeSignedDistanceFunction_h
#define itkShapeSignedDistanceFunction_h
#include "itkSpatialFunction.h"
#include "itkOptimizerParameters.h"
namespace itk
{
/** \class ShapeSignedDistanceFunction
* \brief Base class for functions which evaluates the signed distance
* from a shape.
*
* ShapeSignedDistanceFunction is the base class for functions which
* returns the signed distance from a shape at an arbitrary point.
* A shape assumed to be defined by a set of shape and pose parameters.
*
* Note that Initialize() must be called before use.
* This allows the class an opportunity to validate any inputs.
*
* This class is templated over the coordinate representation type
* (e.g. float or double) and the space dimension.
*
* ShapeSignedDistanceFunction is used to encapsulate the shape prior
* in ShapePriorSegmentationLevelSetFunctions.
*
* \sa SpatialFunction
* \sa ShapePriorSegmentationLevelSetFunction
*
* \ingroup ImageFunctions
*
*
* \ingroup ITKSignedDistanceFunction
*/
template< typename TCoordRep, unsigned int VSpaceDimension >
class ShapeSignedDistanceFunction:
public SpatialFunction< double, VSpaceDimension, Point< TCoordRep, VSpaceDimension > >
{
public:
/** Standard class typedefs. */
typedef ShapeSignedDistanceFunction Self;
typedef SpatialFunction< double, VSpaceDimension,
Point< TCoordRep, VSpaceDimension > > Superclass;
typedef SmartPointer< Self > Pointer;
typedef SmartPointer< const Self > ConstPointer;
/** Run-time type information (and related methods). */
itkTypeMacro(ShapeSignedDistanceFunction, SpatialFunction);
/** OutputType typedef support. */
typedef typename Superclass::OutputType OutputType;
/** InputType typedef support. */
typedef typename Superclass::InputType InputType;
/** Dimension underlying input image. */
itkStaticConstMacro(SpaceDimension, unsigned int, VSpaceDimension);
/** CoordRep typedef support. */
typedef TCoordRep CoordRepType;
/** Point typedef support. */
typedef InputType PointType;
/** Type of the shape parameters. */
typedef OptimizerParameters< double > ParametersType;
/** A shape is defined by a set of shape parameters. */
virtual void SetParameters(const ParametersType &) = 0;
virtual ParametersType & GetParameters(void)
{ return m_Parameters; }
virtual unsigned int GetNumberOfShapeParameters(void) const = 0;
virtual unsigned int GetNumberOfPoseParameters(void) const = 0;
virtual unsigned int GetNumberOfParameters(void) const
{ return this->GetNumberOfShapeParameters() + this->GetNumberOfPoseParameters(); }
/** Evaluate the signed distance from a shape at a given position. */
virtual OutputType Evaluate(const PointType & point) const ITK_OVERRIDE = 0;
/** Initialize must be called before the first call of SetParameters() or
Evaluate() to allow the class to validate any inputs. */
virtual void Initialize() {}
protected:
ShapeSignedDistanceFunction() {}
~ShapeSignedDistanceFunction() ITK_OVERRIDE {}
void PrintSelf(std::ostream & os, Indent indent) const ITK_OVERRIDE
{
Superclass::PrintSelf(os, indent);
//FIX os << indent << "Parameters: " << m_Parameters << std::endl;
}
ParametersType m_Parameters;
private:
ITK_DISALLOW_COPY_AND_ASSIGN(ShapeSignedDistanceFunction);
};
} // end namespace itk
#endif
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