1 /*========================================================================= 2 * 3 * Copyright Insight Software Consortium 4 * 5 * Licensed under the Apache License, Version 2.0 (the "License"); 6 * you may not use this file except in compliance with the License. 7 * You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0.txt 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 * 17 *=========================================================================*/ 18 #ifndef itkSinRegularizedHeavisideStepFunction_h 19 #define itkSinRegularizedHeavisideStepFunction_h 20 21 #include "itkRegularizedHeavisideStepFunction.h" 22 23 namespace itk 24 { 25 /** \class SinRegularizedHeavisideStepFunction 26 * 27 * \brief Sin-based implementation of the Regularized (smoothed) Heaviside functions. 28 * 29 * \author Mosaliganti K., Smith B., Gelas A., Gouaillard A., Megason S. 30 * 31 * This code was taken from the Insight Journal paper: 32 * 33 * "Cell Tracking using Coupled Active Surfaces for Nuclei and Membranes" 34 * http://www.insight-journal.org/browse/publication/642 35 * https://hdl.handle.net/10380/3055 36 * 37 * That is based on the papers: 38 * 39 * "Level Set Segmentation: Active Contours without edge" 40 * http://www.insight-journal.org/browse/publication/322 41 * https://hdl.handle.net/1926/1532 42 * 43 * and 44 * 45 * "Level set segmentation using coupled active surfaces" 46 * http://www.insight-journal.org/browse/publication/323 47 * https://hdl.handle.net/1926/1533 48 * 49 * 50 * \ingroup ITKCommon 51 */ 52 template< typename TInput = float, typename TOutput = double > 53 class ITK_TEMPLATE_EXPORT SinRegularizedHeavisideStepFunction: 54 public RegularizedHeavisideStepFunction< TInput, TOutput > 55 { 56 public: 57 ITK_DISALLOW_COPY_AND_ASSIGN(SinRegularizedHeavisideStepFunction); 58 59 using Self = SinRegularizedHeavisideStepFunction; 60 using Superclass = RegularizedHeavisideStepFunction< TInput, TOutput >; 61 using Pointer = SmartPointer< Self >; 62 using ConstPointer = SmartPointer< const Self >; 63 64 itkNewMacro(Self); 65 66 itkTypeMacro(SinRegularizedHeavisideStepFunction, RegularizedHeavisideStepFunction); 67 68 using InputType = typename Superclass::InputType; 69 using OutputType = typename Superclass::OutputType; 70 using RealType = typename Superclass::RealType; 71 72 /** Evaluate at the specified input position */ 73 OutputType Evaluate(const InputType & input) const override; 74 75 /** Evaluate the derivative at the specified input position */ 76 OutputType EvaluateDerivative(const InputType & input) const override; 77 78 protected: 79 SinRegularizedHeavisideStepFunction() = default; 80 ~SinRegularizedHeavisideStepFunction() override = default; 81 }; 82 } 83 84 #ifndef ITK_MANUAL_INSTANTIATION 85 #include "itkSinRegularizedHeavisideStepFunction.hxx" 86 #endif 87 88 #endif 89