1 /* 2 * Medical Image Registration ToolKit (MIRTK) 3 * 4 * Copyright 2016 Imperial College London 5 * Copyright 2016 Andreas Schuh 6 * 7 * Licensed under the Apache License, Version 2.0 (the "License"); 8 * you may not use this file except in compliance with the License. 9 * You may obtain a copy of the License at 10 * 11 * http://www.apache.org/licenses/LICENSE-2.0 12 * 13 * Unless required by applicable law or agreed to in writing, software 14 * distributed under the License is distributed on an "AS IS" BASIS, 15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 16 * See the License for the specific language governing permissions and 17 * limitations under the License. 18 */ 19 20 #ifndef MIRTK_ImageCovariance_H 21 #define MIRTK_ImageCovariance_H 22 23 #include "mirtk/HistogramImageSimilarity.h" 24 25 26 namespace mirtk { 27 28 29 /** 30 * Joint entropy image similarity measure 31 */ 32 class ImageCovariance : public HistogramImageSimilarity 33 { 34 mirtkEnergyTermMacro(ImageCovariance, EM_CoVar); 35 36 // --------------------------------------------------------------------------- 37 // Construction/Destruction 38 public: 39 40 /// Constructor 41 ImageCovariance(const char * = ""); 42 43 /// Copy constructor 44 ImageCovariance(const ImageCovariance &); 45 46 /// Assignment operator 47 ImageCovariance &operator =(const ImageCovariance &); 48 49 /// Destructor 50 ~ImageCovariance(); 51 52 // --------------------------------------------------------------------------- 53 // Evaluation 54 protected: 55 56 /// Evaluate similarity of images 57 virtual double Evaluate(); 58 59 // --------------------------------------------------------------------------- 60 // Debugging 61 public: 62 63 /// Return unweighted and unnormalized raw energy term value 64 /// \remarks Use for progress reporting only. 65 virtual double RawValue(double) const; 66 67 }; 68 69 70 } // namespace mirtk 71 72 #endif // MIRTK_ImageCovariance_H 73