cxVolumeHelpers.cpp

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/*=========================================================================
This file is part of CustusX, an Image Guided Therapy Application.

Copyright (c) 2008-2014, SINTEF Department of Medical Technology
All rights reserved.

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modification, are permitted provided that the following conditions are met:

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   this list of conditions and the following disclaimer.

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   may be used to endorse or promote products derived from this software 
   without specific prior written permission.

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#include "cxVolumeHelpers.h"

#include <vtkUnsignedCharArray.h>
#include <vtkImageData.h>
#include <vtkPointData.h>
#include <vtkDoubleArray.h>
#include <vtkImageResample.h>
#include <vtkImageClip.h>
#include <vtkImageShiftScale.h>
#include <vtkImageAccumulate.h>
#include <vtkImageLuminance.h>

#include "cxImage.h"

#include "cxUtilHelpers.h"
#include "cxImageTF3D.h"
#include "cxImageLUT2D.h"
#include "cxRegistrationTransform.h"
#include "cxLogger.h"
#include "cxEnumConverter.h"
#include "cxTime.h"
#include "cxCoordinateSystemHelpers.h"
#include "cxPatientModelService.h"

typedef vtkSmartPointer<vtkDoubleArray> vtkDoubleArrayPtr;

namespace cx
{

namespace {
template<class TYPE, int TYPE_FROM_VTK>
vtkImageDataPtr generateVtkImageDataGeneric(Eigen::Array3i dim,
                                                                         Vector3D spacing,
                                                                         const TYPE initValue,
                                                                         int components)
{
        vtkImageDataPtr data = vtkImageDataPtr::New();
        data->SetSpacing(spacing[0], spacing[1], spacing[2]);
        data->SetExtent(0, dim[0]-1, 0, dim[1]-1, 0, dim[2]-1);
//      data->SetScalarType(TYPE_FROM_VTK);
//      data->SetNumberOfScalarComponents(components);
//      data->AllocateScalars();
        data->AllocateScalars(TYPE_FROM_VTK, components);

        int scalarSize = dim[0]*dim[1]*dim[2]*components;

        TYPE* ptr = reinterpret_cast<TYPE*>(data->GetScalarPointer());
        std::fill(ptr, ptr+scalarSize, initValue);

        // FIXED: replace with setDeepModified(image)
        // A trick to get a full LUT in Image (automatic LUT generation)
        // Can't seem to fix this by calling Image::resetTransferFunctions() after volume is modified
/*      if (scalarSize > 0)
        {
                ptr[0] = 150;
//              ptr[0] = 255;
                if (scalarSize > 1)
                        ptr[1] = 50;
                data->GetScalarRange();// Update internal data in vtkImageData. Seems like it is not possible to update this data after the volume has been changed.
                ptr[0] = initValue;
                if (scalarSize > 1)
                        ptr[1] = initValue;
        }*/
//      data->UpdateInformation(); // update extent etc
        setDeepModified(data);

        return data;
}
} // namespace

vtkImageDataPtr generateVtkImageData(Eigen::Array3i dim,
                                     Vector3D spacing,
                                     const unsigned char initValue,
                                     int components)
{
        return generateVtkImageDataGeneric<unsigned char, VTK_UNSIGNED_CHAR>(dim, spacing, initValue, components);
}

vtkImageDataPtr generateVtkImageDataUnsignedShort(Eigen::Array3i dim,
                                                                         Vector3D spacing,
                                                                         const unsigned short initValue,
                                                                         int components)
{
        return generateVtkImageDataGeneric<unsigned short, VTK_UNSIGNED_SHORT>(dim, spacing, initValue, components);
}

vtkImageDataPtr generateVtkImageDataSignedShort(Eigen::Array3i dim,
                                                                         Vector3D spacing,
                                                                         const short initValue,
                                                                         int components)
{
        return generateVtkImageDataGeneric<short, VTK_SHORT>(dim, spacing, initValue, components);
}

vtkImageDataPtr generateVtkImageDataDouble(Eigen::Array3i dim,
                                           Vector3D spacing,
                                           double initValue)
{
        return generateVtkImageDataGeneric<double, VTK_DOUBLE>(dim, spacing, initValue, 1);
}

void fillShortImageDataWithGradient(vtkImageDataPtr data, int maxValue)
{
        Eigen::Array3i dim(data->GetDimensions());

        unsigned short* ptr = reinterpret_cast<unsigned short*>(data->GetScalarPointer());

//      int scalarSize = dim[0]*dim[1]*dim[2]*1;
        for (int z=0; z<dim[2]; ++z)
                for (int y=0; y<dim[1]; ++y)
                        for (int x=0; x<dim[0]; ++x)
                        {
                                int mod = maxValue;
                                int val = int((double(z)/dim[2]*mod*6))%mod;// + y%255 + x/255;
                                if (val < mod/3)
                                        val = 0;
                                ptr[z*dim[0]*dim[1] + y*dim[0] + x] = val;
                        }

        //      unsigned char* ptr = reinterpret_cast<unsigned char*>(imageData->GetScalarPointer());

        //      int scalarSize = dim[0]*dim[1]*dim[2]*1;
        //      for (int z=0; z<dim[2]; ++z)
        //              for (int y=0; y<dim[1]; ++y)
        //                      for (int x=0; x<dim[0]; ++x)
        //                      {
        //                              int val = int((double(z)/dim[2]*255*6))%255;// + y%255 + x/255;
        //                              val = val/3;
        //                              ptr[z*dim[0]*dim[1] + y*dim[0] + x] = val;
        //                      }
        setDeepModified(data);
}

ImagePtr createDerivedImage(PatientModelServicePtr dataManager, QString uid, QString name, vtkImageDataPtr raw, ImagePtr parent)
{
        ImagePtr retval = dataManager->createSpecificData<Image>(uid, name);
        retval->setVtkImageData(raw);
        retval->intitializeFromParentImage(parent);
        return retval;
}

ImagePtr convertImageToUnsigned(PatientModelServicePtr  dataManager, ImagePtr image, vtkImageDataPtr suggestedConvertedVolume, bool verbose)
{
        vtkImageDataPtr input = image->getBaseVtkImageData();

        if (input->GetScalarTypeMin() >= 0)
                return image;

        // start by shifting up to zero
        int shift = -input->GetScalarRange()[0];
        // if CT: always shift by 1024 (houndsfield units definition)
        if (image->getModality().contains("CT", Qt::CaseInsensitive))
                shift = 1024;

        vtkImageDataPtr convertedImageData = suggestedConvertedVolume; // use input if given

        // convert volume
        if (!convertedImageData)
        {
                vtkImageShiftScalePtr cast = vtkImageShiftScalePtr::New();
                cast->SetInputData(input);
                cast->ClampOverflowOn();

                cast->SetShift(shift);

                // total intensity range of voxels:
                double range = input->GetScalarRange()[1] - input->GetScalarRange()[0];

                // to to fit within smallest type
                if (range <= VTK_UNSIGNED_SHORT_MAX-VTK_UNSIGNED_SHORT_MIN)
                        cast->SetOutputScalarType(VTK_UNSIGNED_SHORT);
                else if (range <= VTK_UNSIGNED_INT_MAX-VTK_UNSIGNED_INT_MIN)
                        cast->SetOutputScalarType(VTK_UNSIGNED_INT);
        //      else if (range <= VTK_UNSIGNED_LONG_MAX-VTK_UNSIGNED_LONG_MIN) // not supported by vtk - it seems (crash in rendering)
        //              cast->SetOutputScalarType(VTK_UNSIGNED_LONG);
                else
                        cast->SetOutputScalarType(VTK_UNSIGNED_INT);

                cast->Update();
                if (verbose)
                        report(QString("Converting image %1 from %2 to %3, shift=%4")
                                                                                        .arg(image->getName())
                                                                                        .arg(input->GetScalarTypeAsString())
                                                                                        .arg(cast->GetOutput()->GetScalarTypeAsString())
                                                                                        .arg(shift));
                convertedImageData = cast->GetOutput();
        }

        ImagePtr retval = createDerivedImage(dataManager,
                                                                                 image->getUid()+"_u", image->getName()+" u",
                                                                                 convertedImageData, image);

        ImageTF3DPtr TF3D = retval->getTransferFunctions3D()->createCopy();
        ImageLUT2DPtr LUT2D = retval->getLookupTable2D()->createCopy();

        TF3D->shift(shift);
        LUT2D->shift(shift);

        retval->setLookupTable2D(LUT2D);
        retval->setTransferFunctions3D(TF3D);

        return retval;
}

std::map<std::string, std::string> getDisplayFriendlyInfo(ImagePtr image)
{
        std::map<std::string, std::string> retval;
        if(!image)
                return retval;

        //image
        retval["Filename"] = image->getFilename().toStdString();
        retval["Coordinate system"] = image->getCoordinateSystem().toString().toStdString();
        retval["Image type"] = image->getImageType().toStdString();
        retval["Scalar minimum"] = string_cast(image->getMin());
        retval["Scalar maximum"] = string_cast(image->getMax());
        retval["Range (max - min)"] = string_cast(image->getRange());
        retval["Maximum alpha value"] = string_cast(image->getMaxAlphaValue());
        retval["Modality"] = image->getModality().toStdString();
        retval["Name"] = image->getName().toStdString();
        retval["Parent space"] = image->getParentSpace().toStdString();
        retval["Shading"] = image->getShadingOn() ? "on" : "off";
        retval["Space"] = image->getSpace().toStdString();
        retval["Type"] = image->getType().toStdString();
        retval["Uid"] = image->getUid().toStdString();
        retval["Acquisition time"] = string_cast(image->getAcquisitionTime().toString(timestampSecondsFormatNice()));
        retval["Voxels with min value"] = string_cast(calculateNumVoxelsWithMinValue(image));
        retval["Voxels with max value"] = string_cast(calculateNumVoxelsWithMaxValue(image));
        retval["rMd"] = string_cast(image->get_rMd());

        std::map<std::string, std::string> volumeMap = getDisplayFriendlyInfo(image->getBaseVtkImageData());
        retval.insert(volumeMap.begin(), volumeMap.end());

        return retval;
}

std::map<std::string, std::string> getDisplayFriendlyInfo(vtkImageDataPtr image)
{
        std::map<std::string, std::string> retval;
        if(!image)
                return retval;

        double spacing_x, spacing_y, spacing_z;
        image->GetSpacing(spacing_x, spacing_y, spacing_z);
        retval["Spacing"] = string_cast(spacing_x)+" mm , "+string_cast(spacing_y)+" mm , "+string_cast(spacing_z)+" mm ";
        int dims[3];
        image->GetDimensions(dims);
        retval["Dimensions"] = string_cast(dims[0])+" , "+string_cast(dims[1])+" , "+string_cast(dims[2]);
        retval["Size"] = string_cast(dims[0]*spacing_x)+" mm , "+string_cast(dims[1]*spacing_y)+" mm, "+string_cast(dims[2]*spacing_z)+" mm";
        float actualMemorySizeKB = (float)image->GetActualMemorySize();
        retval["Actual memory size"] = string_cast(actualMemorySizeKB/(1024*1024))+" GB, "+string_cast(actualMemorySizeKB/1024)+" MB, "+string_cast(actualMemorySizeKB)+" kB"+string_cast(actualMemorySizeKB*1024)+" bytes";
        retval["Scalar components"] = string_cast(image->GetNumberOfScalarComponents());
        retval["Number of components for points"] = string_cast(image->GetPointData()->GetNumberOfComponents());
        retval["Scalar type"] = string_cast(image->GetScalarTypeAsString());
        retval["Scalar size"] = string_cast(image->GetScalarSize());
        int extent[6];
        image->GetExtent(extent);
        retval["Extent"] = string_cast(extent[0])+" , "+string_cast(extent[1])+" , "+string_cast(extent[2])+" , "+string_cast(extent[3])+" , "+string_cast(extent[4])+" , "+string_cast(extent[5]);

        return retval;
}

void printDisplayFriendlyInfo(std::map<std::string, std::string> map)
{
        report("----- DisplayFriendlyInfo -----");
        std::map<std::string, std::string>::iterator it;
        for(it = map.begin(); it != map.end(); ++it)
        {
                QString message((it->first+": "+it->second).c_str());
                report(message);
        }
        report("-------------------------------");
}

int calculateNumVoxelsWithMaxValue(ImagePtr image)
{
        return static_cast<int*>(image->getHistogram()->GetOutput()->GetScalarPointer())[image->getRange()];
}
int calculateNumVoxelsWithMinValue(ImagePtr image)
{
        return static_cast<int*>(image->getHistogram()->GetOutput()->GetScalarPointer())[0];
}

DoubleBoundingBox3D findEnclosingBoundingBox(std::vector<DataPtr> data, Transform3D qMr)
{
        if (data.empty())
                return DoubleBoundingBox3D(0, 0, 0, 0, 0, 0);

        std::vector<Vector3D> corners_r;

        for (unsigned i = 0; i < data.size(); ++i)
        {
                Transform3D qMd = qMr * data[i]->get_rMd();
                DoubleBoundingBox3D bb = data[i]->boundingBox();

                corners_r.push_back(qMd.coord(bb.corner(0, 0, 0)));
                corners_r.push_back(qMd.coord(bb.corner(0, 0, 1)));
                corners_r.push_back(qMd.coord(bb.corner(0, 1, 0)));
                corners_r.push_back(qMd.coord(bb.corner(0, 1, 1)));
                corners_r.push_back(qMd.coord(bb.corner(1, 0, 0)));
                corners_r.push_back(qMd.coord(bb.corner(1, 0, 1)));
                corners_r.push_back(qMd.coord(bb.corner(1, 1, 0)));
                corners_r.push_back(qMd.coord(bb.corner(1, 1, 1)));
        }

        DoubleBoundingBox3D bb_sigma = DoubleBoundingBox3D::fromCloud(corners_r);
        return bb_sigma;
}

DoubleBoundingBox3D findEnclosingBoundingBox(std::vector<ImagePtr> images, Transform3D qMr)
{
        std::vector<DataPtr> datas(images.size());
        for (unsigned i = 0; i < images.size(); ++i)
                datas[i] = images[i];
        return findEnclosingBoundingBox(datas, qMr);
}

vtkImageDataPtr convertImageDataToGrayScale(vtkImageDataPtr image)
{
        vtkImageDataPtr retval = image;
        if (image->GetNumberOfScalarComponents() > 2)
        {
                vtkSmartPointer<vtkImageLuminance> luminance = vtkSmartPointer<vtkImageLuminance>::New();
                luminance->SetInputData(image);
                luminance->Update();
                retval = luminance->GetOutput();
//              retval->Update();
        }
        return retval;
}

vtkImageDataPtr convertImageDataTo8Bit(vtkImageDataPtr image, double windowWidth, double windowLevel)
{
        vtkImageDataPtr retval = image;
        if (image->GetScalarSize() > 1)
                {
                        vtkImageShiftScalePtr imageCast = vtkImageShiftScalePtr::New();
                        imageCast->SetInputData(image);

//                      double scalarMax = windowWidth/2.0 + windowLevel;
                        double scalarMin = windowWidth/2.0 - windowLevel;

                        double addToScalarValue = -scalarMin;
                        double multiplyToScalarValue = 255/windowWidth;

                        imageCast->SetShift(addToScalarValue);
                        imageCast->SetScale(multiplyToScalarValue);
                        imageCast->SetOutputScalarTypeToUnsignedChar();
                        imageCast->ClampOverflowOn();
                        imageCast->Update();
                        retval = imageCast->GetOutput();
//                      retval->Update();
                }
        return retval;
}

void setDeepModified(vtkImageDataPtr image)
{
        image->Modified();
        image->GetPointData()->Modified();
        image->GetPointData()->GetScalars()->Modified();
}

} // namespace cx