Splitting up SimilarityMeasure into similarity computation and optimization part:

* Introducing NloptRegistration pipeline performing the optimization
* SimilarityMeasure only computes the similarity and difference image

ext/tgt/painter.h

@@ -78,7 +78,7 @@ public:
     /// A wrapper to get the camera from the Canvas
     Camera* getCamera() const;
 
-protected:
+
     /**
      * This is meant be overridden to do the according openGL paintings
      * is not meant to be called directly, will be called by repaint().

modules/registration/pipelines/reducertest.cpp → modules/registration/pipelines/nloptregistration.cpp

@@ -27,37 +27,62 @@
 // 
 // ================================================================================================
 
-#include "reducertest.h"
+#include "nloptregistration.h"
 
 #include "tgt/event/keyevent.h"
+#include "tgt/openglgarbagecollector.h"
+#include "tgt/painter.h"
 
 #include "core/classification/geometry1dtransferfunction.h"
 #include "core/classification/tfgeometry1d.h"
 #include "core/datastructures/renderdata.h"
-
 #include "core/tools/glreduction.h"
+#include "core/tools/job.h"
+#include "core/tools/opengljobprocessor.h"
 
 namespace campvis {
+    static const GenericOption<nlopt::algorithm> optimizers[3] = {
+        GenericOption<nlopt::algorithm>("cobyla", "COBYLA", nlopt::LN_COBYLA),
+        GenericOption<nlopt::algorithm>("newuoa", "NEWUOA", nlopt::LN_NEWUOA),
+        GenericOption<nlopt::algorithm>("neldermead", "Nelder-Mead Simplex", nlopt::LN_NELDERMEAD)
+    };
 
-    ReducerTest::ReducerTest(DataContainer* dc)
+    NloptRegistration::NloptRegistration(DataContainer* dc)
         : AutoEvaluationPipeline(dc)
+        , p_optimizer("Optimizer", "Optimizer", optimizers, 3)
+        , p_liveUpdate("LiveUpdate", "Live Update of Difference Image", false)
+        , p_performOptimization("PerformOptimization", "Perform Optimization", AbstractProcessor::INVALID_RESULT)
+        , p_forceStop("Force Stop", "Force Stop", AbstractProcessor::VALID)
+        , p_translationStepSize("TranslationStepSize", "Initial Step Size Translation", 8.f, .1f, 100.f)
+        , p_rotationStepSize("RotationStepSize", "Initial Step Size Rotation", .5f, .01f, tgt::PIf)
         , _referenceReader()
         , _movingReader()
         , _sm()
         , _ve(&_canvasSize)
+        , _opt(0)
     {
         addProcessor(&_referenceReader);
         addProcessor(&_movingReader);
         addProcessor(&_sm);
         addProcessor(&_ve);
 
+        addProperty(&p_optimizer);
+        addProperty(&p_liveUpdate);
+        addProperty(&p_performOptimization);
+        addProperty(&p_forceStop);
+        addProperty(&p_translationStepSize);
+        addProperty(&p_rotationStepSize);
+
+        p_performOptimization.s_clicked.connect(this, &NloptRegistration::onPerformOptimizationClicked);
+        p_forceStop.s_clicked.connect(this, &NloptRegistration::forceStop);
+
         addEventListenerToBack(&_ve);
     }
 
-    ReducerTest::~ReducerTest() {
+    NloptRegistration::~NloptRegistration() {
     }
 
-    void ReducerTest::init() {
+    void NloptRegistration::init() {
         AutoEvaluationPipeline::init();
 
         _referenceReader.p_url.setValue("D:/Medical Data/SCR/Data/RegSweeps_phantom_cropped/-1S1median/Volume_2.mhd");
@@ -69,6 +94,7 @@ namespace campvis {
         _movingReader.p_targetImageID.addSharedProperty(&_sm.p_movingId);
 
         _sm.p_differenceImageId.addSharedProperty(&_ve.p_inputVolume);
+        _sm.p_metric.selectById("NCC");
 
         _ve.p_outputImage.setValue("volumeexplorer");
         _renderTargetID.setValue("volumeexplorer");
@@ -80,8 +106,117 @@ namespace campvis {
         static_cast<TransferFunctionProperty*>(mp->getProperty("transferFunction"))->replaceTF(dvrTF);
     }
 
-    void ReducerTest::onProcessorValidated(AbstractProcessor* processor) {
+    void NloptRegistration::deinit() {
+        delete _opt;
+        _opt = 0;
+
+        AutoEvaluationPipeline::deinit();
+    }
+
+    void NloptRegistration::onProcessorValidated(AbstractProcessor* processor) {
 
     }
 
+    void NloptRegistration::onPerformOptimizationClicked() {
+        // Evaluation of the similarity measure needs an OpenGL context, so we need to create an OpenGL job for this.
+        GLJobProc.enqueueJob(_canvas, makeJobOnHeap(this, &NloptRegistration::performOptimization), OpenGLJobProcessor::SerialJob);
+    }
+
+    void NloptRegistration::performOptimization() {
+        ImageRepresentationGL::ScopedRepresentation referenceImage(getDataContainer(), _sm.p_referenceId.getValue());
+        ImageRepresentationGL::ScopedRepresentation movingImage(getDataContainer(), _sm.p_movingId.getValue());
+
+        if (_opt != 0) {
+            LWARNING("Optimization is already running...");
+            return;
+        }
+
+        MyFuncData_t mfd = { this, referenceImage, movingImage, 0 };
+
+        _opt = new nlopt::opt(p_optimizer.getOptionValue(), 6);
+        if (_sm.p_metric.getOptionValue() == "NCC" || _sm.p_metric.getOptionValue() == "SNR") {
+            _opt->set_max_objective(&NloptRegistration::optimizerFunc, &mfd);
+        }
+        else {
+            _opt->set_min_objective(&NloptRegistration::optimizerFunc, &mfd);
+        }
+        _opt->set_xtol_rel(1e-4);
+
+        std::vector<double> x(6);
+        x[0] = _sm.p_translation.getValue().x;
+        x[1] = _sm.p_translation.getValue().y;
+        x[2] = _sm.p_translation.getValue().z;
+        x[3] = _sm.p_rotation.getValue().x;
+        x[4] = _sm.p_rotation.getValue().y;
+        x[5] = _sm.p_rotation.getValue().z;
+
+        std::vector<double> stepSize(6);
+        stepSize[0] = p_translationStepSize.getValue();
+        stepSize[1] = p_translationStepSize.getValue();
+        stepSize[2] = p_translationStepSize.getValue();
+        stepSize[3] = p_rotationStepSize.getValue();
+        stepSize[4] = p_rotationStepSize.getValue();
+        stepSize[5] = p_rotationStepSize.getValue();
+        _opt->set_initial_step(stepSize);
+
+        double minf;
+        nlopt::result result = nlopt::SUCCESS;
+        try {
+            result = _opt->optimize(x, minf);
+        }
+        catch (std::exception& e) {
+            LERROR("Excpetion during optimization: " << e.what());
+        }
+
+        if (result >= nlopt::SUCCESS || result <= nlopt::ROUNDOFF_LIMITED) {
+            LDEBUG("Optimization successful, took " << mfd._count << " steps.");
+            tgt::vec3 t(x[0], x[1], x[2]);
+            tgt::vec3 r(x[3], x[4], x[5]);
+            _sm.p_translation.setValue(t);
+            _sm.p_rotation.setValue(r);
+
+            // compute difference image and render difference volume
+            _sm.generateDifferenceImage(_data, referenceImage, movingImage, t, r);
+            _ve.process(getDataContainer());
+        }
+
+        delete _opt;
+        _opt = 0;
+    }
+
+    double NloptRegistration::optimizerFunc(const std::vector<double>& x, std::vector<double>& grad, void* my_func_data) {
+        tgtAssert(x.size() == 6, "Must have 6 values in x.");
+        tgtAssert(my_func_data != 0, "my_func_data must not be 0");
+
+        MyFuncData_t* mfd = static_cast<MyFuncData_t*>(my_func_data);
+        ++mfd->_count;
+        tgt::vec3 translation(x[0], x[1], x[2]);
+        tgt::vec3 rotation(x[3], x[4], x[5]);
+        float similarity = mfd->_object->_sm.computeSimilarity(mfd->_reference, mfd->_moving, translation, rotation);
+        LDEBUG(translation << rotation << " : " << similarity);
+
+        // perform interactive update if wished
+        if (mfd->_object->p_liveUpdate.getValue()) {
+            // compute difference image
+            mfd->_object->_sm.generateDifferenceImage(mfd->_object->_data, mfd->_reference, mfd->_moving, translation, rotation);
+
+            // render difference volume
+            mfd->_object->_ve.process(mfd->_object->getDataContainer());
+
+            // update canvas
+            mfd->_object->_canvas->getPainter()->paint();
+        }
+
+        // clean up unused GL textures.
+        GLGC.deleteGarbage();
+
+        return similarity;
+    }
+
+    void NloptRegistration::forceStop() {
+        if (_opt != 0)
+            _opt->force_stop();
+    }
+
+
 }

modules/registration/pipelines/reducertest.h → modules/registration/pipelines/nloptregistration.h

@@ -27,8 +27,8 @@
 // 
 // ================================================================================================
 
-#ifndef REDUCERTEST_H__
-#define REDUCERTEST_H__
+#ifndef NLOPTREGISTRATION_H__
+#define NLOPTREGISTRATION_H__
 
 #include "core/datastructures/imagerepresentationlocal.h"
 #include "core/eventhandlers/mwheeltonumericpropertyeventlistener.h"
@@ -41,28 +41,47 @@
 
 #include "modules/registration/processors/similaritymeasure.h"
 
+#include <nlopt.hpp>
+
 namespace campvis {
-    class ReducerTest : public AutoEvaluationPipeline {
+    class NloptRegistration : public AutoEvaluationPipeline {
     public:
         /**
          * Creates a AutoEvaluationPipeline.
          */
-        ReducerTest(DataContainer* dc);
+        NloptRegistration(DataContainer* dc);
 
         /**
          * Virtual Destructor
          **/
-        virtual ~ReducerTest();
+        virtual ~NloptRegistration();
 
         /// \see AutoEvaluationPipeline::init()
         virtual void init();
+        /// \see AutoEvaluationPipeline::deinit()
+        virtual void deinit();
 
         /// \see AbstractPipeline::getName()
         virtual const std::string getName() const { return getId(); };
-        static const std::string getId() { return "ReducerTest"; };
+        static const std::string getId() { return "NloptRegistration"; };
+
+        GenericOptionProperty<nlopt::algorithm> p_optimizer;    ///< Optimizer Algorithm
+        BoolProperty p_liveUpdate;                              ///< Live Update of the difference image
+        ButtonProperty p_performOptimization;                   ///< Start Optimization
+        ButtonProperty p_forceStop;                             ///< Stop Optimization
 
+        FloatProperty p_translationStepSize;                    ///< Initial Step Size for Translation
+        FloatProperty p_rotationStepSize;                       ///< Initial Step Size for Rotation
 
     protected:
+        /// Auxiliary data structure for nlopt
+        struct MyFuncData_t {
+            NloptRegistration* _object;
+            const ImageRepresentationGL* _reference;
+            const ImageRepresentationGL* _moving;
+            size_t _count;
+        };
+
         /**
          * Slot getting called when one of the observed processors got validated.
          * Updates the camera properties, when the input image has changed.
@@ -70,14 +89,42 @@ namespace campvis {
          */
         virtual void onProcessorValidated(AbstractProcessor* processor);
 
+        /**
+         * Callback method called from p_performOptimization.
+         * (Does not need an OpenGL context)
+         */
+        void onPerformOptimizationClicked();
+        
+        /**
+         * Perform optimization to register \a movingImage to \a referenceImage.
+         * \note    Needs to be called from a valid OpenGL context!
+         */
+        void performOptimization();
+
+        /**
+         * Free function to be called by nlopt optimizer computing the similarity.
+         * \note    Needs to be called from a valid OpenGL context!
+         * \param   x               Optimization vector
+         * \param   grad            Gradient vector (currently ignored!)
+         * \param   my_func_data    Auxiliary data structure0
+         * \return  Result of the cost function.
+         */
+        static double optimizerFunc(const std::vector<double>& x, std::vector<double>& grad, void* my_func_data);
+
+        /**
+         * Stop the Optimization process.
+         */
+        void forceStop();
+
+
         MhdImageReader _referenceReader;
         MhdImageReader _movingReader;
         SimilarityMeasure _sm;
-
         VolumeExplorer _ve;
         
+        nlopt::opt* _opt;                               ///< Pointer to nlopt Optimizer object
     };
 
 }
 
-#endif // REDUCERTEST_H__
+#endif // NLOPTREGISTRATION_H__

modules/registration/processors/similaritymeasure.cpp

@@ -31,7 +31,6 @@
 #include "tgt/logmanager.h"
 #include "tgt/shadermanager.h"
 #include "tgt/textureunit.h"
-#include "tgt/openglgarbagecollector.h"
 
 #include "core/datastructures/facegeometry.h"
 #include "core/datastructures/imagedata.h"
@@ -45,11 +44,6 @@
 #include "core/tools/quadrenderer.h"
 
 namespace campvis {
-    static const GenericOption<nlopt::algorithm> optimizers[3] = {
-        GenericOption<nlopt::algorithm>("cobyla", "COBYLA", nlopt::LN_COBYLA),
-        GenericOption<nlopt::algorithm>("newuoa", "NEWUOA", nlopt::LN_NEWUOA),
-        GenericOption<nlopt::algorithm>("neldermead", "Nelder-Mead Simplex", nlopt::LN_NELDERMEAD)
-    };
 
     static const GenericOption<std::string> metrics[5] = {
         GenericOption<std::string>("SUM", "Sum"),
@@ -74,16 +68,12 @@ namespace campvis {
         , p_viewportSize("ViewportSize", "Viewport Size", tgt::ivec2(1), tgt::ivec2(1), tgt::ivec2(1000), tgt::ivec2(1), AbstractProcessor::VALID)
         , p_metric("Metric", "Similarity Metric", metrics, 5)
         , p_computeSimilarity("ComputeSimilarity", "Compute Similarity")
-        , p_optimizer("Optimizer", "Optimizer", optimizers, 3)
-        , p_performOptimization("PerformOptimization", "Perform Optimization", AbstractProcessor::INVALID_RESULT | PERFORM_OPTIMIZATION)
         , p_differenceImageId("DifferenceImageId", "Difference Image", "difference", DataNameProperty::WRITE, AbstractProcessor::VALID)
         , p_computeDifferenceImage("ComputeDifferenceImage", "Compute Difference Image", AbstractProcessor::INVALID_RESULT | COMPUTE_DIFFERENCE_IMAGE)
-        , p_forceStop("Force Stop", "Force Stop", AbstractProcessor::VALID)
         , _sadssdCostFunctionShader(0)
         , _nccsnrCostFunctionShader(0)
         , _differenceShader(0)
         , _glr(0)
-        , _opt(0)
     {
         addProperty(&p_referenceId);
         addProperty(&p_movingId);
@@ -101,11 +91,6 @@ namespace campvis {
         addProperty(&p_differenceImageId);
         addProperty(&p_computeDifferenceImage);
 
-        addProperty(&p_optimizer);
-        addProperty(&p_performOptimization);
-        addProperty(&p_forceStop);
-
-        p_forceStop.s_clicked.connect(this, &SimilarityMeasure::forceStop);
 
         _viewportSizeProperty = &p_viewportSize;
     }
@@ -139,9 +124,6 @@ namespace campvis {
         delete _glr;
         _glr = 0;
 
-        delete _opt;
-        _opt = 0;
-
         VisualizationProcessor::deinit();
     }
 
@@ -150,10 +132,6 @@ namespace campvis {
         ImageRepresentationGL::ScopedRepresentation movingImage(data, p_movingId.getValue());
 
         if (referenceImage != 0 && movingImage != 0) {
-            if (getInvalidationLevel() & PERFORM_OPTIMIZATION) {
-                performOptimization(referenceImage, movingImage);
-            }
-
             float similarity = computeSimilarity(referenceImage, movingImage, p_translation.getValue(), p_rotation.getValue());
             LDEBUG("Similarity Measure: " << similarity);
 
@@ -184,64 +162,6 @@ namespace campvis {
         validate(AbstractProcessor::INVALID_PROPERTIES);
     }
 
-    void SimilarityMeasure::performOptimization(const ImageRepresentationGL* referenceImage, const ImageRepresentationGL* movingImage) {
-        tgtAssert(referenceImage != 0, "Reference Image must not be 0.");
-        tgtAssert(movingImage != 0, "Moving Image must not be 0.");
-
-        if (_opt != 0) {
-            LWARNING("Optimization is already running...");
-            return;
-        }
-
-        MyFuncData_t mfd = { this, referenceImage, movingImage, 0 };
-
-        _opt = new nlopt::opt(p_optimizer.getOptionValue(), 6);
-        if (p_metric.getOptionValue() == "NCC" || p_metric.getOptionValue() == "SNR") {
-            _opt->set_max_objective(&SimilarityMeasure::optimizerFunc, &mfd);
-        }
-        else {
-            _opt->set_min_objective(&SimilarityMeasure::optimizerFunc, &mfd);
-        }
-        _opt->set_xtol_rel(1e-4);
-
-        std::vector<double> x(6);
-        x[0] = p_translation.getValue().x;
-        x[1] = p_translation.getValue().y;
-        x[2] = p_translation.getValue().z;
-        x[3] = p_rotation.getValue().x;
-        x[4] = p_rotation.getValue().y;
-        x[5] = p_rotation.getValue().z;
-
-        std::vector<double> stepSize(6);
-        stepSize[0] = 8.0;
-        stepSize[1] = 8.0;
-        stepSize[2] = 8.0;
-        stepSize[3] = 0.5;
-        stepSize[4] = 0.5;
-        stepSize[5] = 0.5;
-        _opt->set_initial_step(stepSize);
-
-        double minf;
-        nlopt::result result = nlopt::SUCCESS;
-        try {
-            result = _opt->optimize(x, minf);
-        }
-        catch (std::exception& e) {
-            LERROR("Excpetion during optimization: " << e.what());
-        }
-        
-        if (result >= nlopt::SUCCESS || result <= nlopt::ROUNDOFF_LIMITED) {
-            LDEBUG("Optimization successful, took " << mfd._count << " steps.");
-            p_translation.setValue(tgt::vec3(x[0], x[1], x[2]));
-            p_rotation.setValue(tgt::vec3(x[3], x[4], x[5]));
-        }
-
-        delete _opt;
-        _opt = 0;
-
-        validate(PERFORM_OPTIMIZATION);
-    }
-
     float SimilarityMeasure::computeSimilarity(const ImageRepresentationGL* referenceImage, const ImageRepresentationGL* movingImage, const tgt::vec3& translation, const tgt::vec3& rotation) {
         tgtAssert(referenceImage != 0, "Reference Image must not be 0.");
         tgtAssert(movingImage != 0, "Moving Image must not be 0.");
@@ -260,6 +180,7 @@ namespace campvis {
         similarityTex = new tgt::Texture(0, tgt::ivec3(p_viewportSize.getValue(), 1), GL_RGBA, GL_RGBA32F, GL_FLOAT, tgt::Texture::NEAREST);
         similarityTex->uploadTexture();
         similarityTex->setWrapping(tgt::Texture::CLAMP);
+        // NCC and SNR need a second texture and a different shader...
         if (p_metric.getOptionValue() == "NCC" || p_metric.getOptionValue() == "SNR") {
             similarityTex2 = new tgt::Texture(0, tgt::ivec3(p_viewportSize.getValue(), 1), GL_RGBA, GL_RGBA32F, GL_FLOAT, tgt::Texture::NEAREST);
             similarityTex2->uploadTexture();
@@ -285,18 +206,8 @@ namespace campvis {
         referenceImage->bind(leShader, referenceUnit, "_referenceTexture", "_referenceTextureParams");
         movingImage->bind(leShader, movingUnit, "_movingTexture", "_movingTextureParams");
 
-        tgt::mat4 registrationMatrix = tgt::mat4::createTranslation(translation) * euleranglesToMat4(rotation);
-        tgt::mat4 registrationInverse;
-        if (! registrationMatrix.invert(registrationInverse))
-            tgtAssert(false, "Could not invert registration matrix. This should not happen!");
-
-        const tgt::mat4& w2t = movingImage->getParent()->getMappingInformation().getWorldToTextureMatrix();
-        const tgt::mat4& t2w = referenceImage->getParent()->getMappingInformation().getTextureToWorldMatrix();
-        registrationInverse = w2t * registrationInverse * t2w;
-
-
         // render quad to compute similarity measure by shader
-        leShader->setUniform("_registrationInverse", registrationInverse);
+        leShader->setUniform("_registrationInverse", computeRegistrationMatrix(referenceImage, movingImage, translation, rotation));
         if (p_metric.getOptionValue() == "NCC" || p_metric.getOptionValue() == "SNR") {
             static const GLenum buffers[] = { GL_COLOR_ATTACHMENT0, GL_COLOR_ATTACHMENT1};
             glDrawBuffers(2, buffers);
@@ -366,21 +277,6 @@ namespace campvis {
         return toReturn;
     }
 
-    double SimilarityMeasure::optimizerFunc(const std::vector<double>& x, std::vector<double>& grad, void* my_func_data) {
-        tgtAssert(x.size() == 6, "Must have 6 values in x.");
-        tgtAssert(my_func_data != 0, "my_func_data must not be 0");
-
-        MyFuncData_t* mfd = static_cast<MyFuncData_t*>(my_func_data);
-        ++mfd->_count;
-        tgt::vec3 translation(x[0], x[1], x[2]);
-        tgt::vec3 rotation(x[3], x[4], x[5]);
-        float similarity = mfd->_object->computeSimilarity(mfd->_reference, mfd->_moving, translation, rotation);
-        GLGC.deleteGarbage();
-
-        LDEBUG(translation << rotation << " : " << similarity);
-
-        return similarity;
-    }
 
     tgt::mat4 SimilarityMeasure::euleranglesToMat4(const tgt::vec3& eulerAngles) {
         float sinX = sin(eulerAngles.x);
@@ -414,11 +310,6 @@ namespace campvis {
         similarityTex->uploadTexture();
         similarityTex->setWrapping(tgt::Texture::CLAMP);
 
-        // activate FBO and attach texture
-        _fbo->activate();
-        glViewport(0, 0, static_cast<GLsizei>(viewportSize.x), static_cast<GLsizei>(viewportSize.y));
-        LGL_ERROR;
-
         // bind input images
         _differenceShader->activate();
         _differenceShader->setUniform("_applyMask", p_applyMask.getValue());
@@ -427,20 +318,13 @@ namespace campvis {
         _differenceShader->setUniform("_zClampRange", tgt::vec2(p_clipZ.getValue()) / static_cast<float>(size.z));
         referenceImage->bind(_differenceShader, referenceUnit, "_referenceTexture", "_referenceTextureParams");
         movingImage->bind(_differenceShader, movingUnit, "_movingTexture", "_movingTextureParams");
+        _differenceShader->setUniform("_registrationInverse", computeRegistrationMatrix(referenceImage, movingImage, translation, rotation));
 
-        tgt::mat4 registrationMatrix = tgt::mat4::createTranslation(translation) * euleranglesToMat4(rotation);
-        tgt::mat4 registrationInverse;
-        if (! registrationMatrix.invert(registrationInverse))
-            tgtAssert(false, "Could not invert registration matrix. This should not happen!");
-
-        const tgt::mat4& w2t = movingImage->getParent()->getMappingInformation().getWorldToTextureMatrix();
-        const tgt::mat4& t2w = referenceImage->getParent()->getMappingInformation().getTextureToWorldMatrix();
-        registrationInverse = w2t * registrationInverse * t2w;
-
-
-        // render quad to compute similarity measure by shader
-        _differenceShader->setUniform("_registrationInverse", registrationInverse);
+        // activate FBO and attach texture
+        _fbo->activate();
+        glViewport(0, 0, static_cast<GLsizei>(viewportSize.x), static_cast<GLsizei>(viewportSize.y));
 
+        // render quad to compute difference measure by shader
         for (int z = 0; z < size.z; ++z) {
             float texZ = static_cast<float>(z)/static_cast<float>(size.z) + .5f/static_cast<float>(size.z);
             _differenceShader->setUniform("_zTex", texZ);
@@ -448,13 +332,13 @@ namespace campvis {
             QuadRdr.renderQuad();
         }
         _differenceShader->deactivate();
+        _fbo->deactivate();
 
-        // detach texture and reduce it
+        // put difference image into DataContainer
         ImageData* id = new ImageData(3, size, 1);
         ImageRepresentationGL::create(id, similarityTex);
         id->setMappingInformation(referenceImage->getParent()->getMappingInformation());
         dc->addData(p_differenceImageId.getValue(), id);
-        _fbo->deactivate();
 
         tgt::TextureUnit::setZeroUnit();
         LGL_ERROR;
@@ -462,12 +346,19 @@ namespace campvis {
         validate(COMPUTE_DIFFERENCE_IMAGE);
     }
 
-    void SimilarityMeasure::forceStop() {
-        if (_opt != 0)
-            _opt->force_stop();
+    tgt::mat4 SimilarityMeasure::computeRegistrationMatrix(const ImageRepresentationGL* referenceImage, const ImageRepresentationGL* movingImage, const tgt::vec3& translation, const tgt::vec3& rotation) {
+        tgt::mat4 registrationMatrix = tgt::mat4::createTranslation(translation) * euleranglesToMat4(rotation);
+        tgt::mat4 registrationInverse;
+        if (! registrationMatrix.invert(registrationInverse))
+            tgtAssert(false, "Could not invert registration matrix. This should not happen!");
 
-        validate(PERFORM_OPTIMIZATION);
+        tgt::Bounds movingBounds = movingImage->getParent()->getWorldBounds();
+        tgt::vec3 halfDiagonal = movingBounds.getLLF() + (movingBounds.diagonal() / 2.f);
+        const tgt::mat4& w2t = movingImage->getParent()->getMappingInformation().getWorldToTextureMatrix();
+        const tgt::mat4& t2w = referenceImage->getParent()->getMappingInformation().getTextureToWorldMatrix();
+        return w2t * tgt::mat4::createTranslation(halfDiagonal) * registrationInverse * tgt::mat4::createTranslation(-halfDiagonal) * t2w;
     }
 
 
+
 }

modules/registration/processors/similaritymeasure.h

@@ -46,8 +46,6 @@
 #include "core/properties/numericproperty.h"
 #include "core/properties/transferfunctionproperty.h"
 
-#include <nlopt.hpp>
-
 namespace tgt {
     class Shader;
 }
@@ -94,52 +92,7 @@ namespace campvis {
 
         /// \see AbstractProcessor::process()
         virtual void process(DataContainer& data);
-
-        DataNameProperty p_referenceId;                 ///< image ID for reference image
-        DataNameProperty p_movingId;                    ///< image ID for moving image
-
-        IVec2Property p_clipX;                          ///< clip coordinates for x axis
-        IVec2Property p_clipY;                          ///< clip coordinates for y axis
-        IVec2Property p_clipZ;                          ///< clip coordinates for z axis
-