ImageReader.cpp

/*

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#include "Exception.hpp"
#include <boost/filesystem.hpp>
#define _BACKWARD_BACKWARD_WARNING_H 1 //Cut out the vtk deprecated warning
#include <vtkTIFFReader.h>
#include <vtkPNGReader.h>
#include <vtkJPEGReader.h>
#include <vtkBMPReader.h>
#include <vtkImageResize.h>
#include <vtkImageLuminance.h>
#include "ImageReader.hpp"

ImageReader::ImageReader()
    : mpVtkImage(),
      mFilepath(),
      mResizeX(1.0),
      mResizeY(1.0),
      mResizeZ(1.0)
{

}

boost::shared_ptr<ImageReader> ImageReader::Create()
{
    MAKE_PTR(ImageReader, pSelf);
    return pSelf;
}

ImageReader::~ImageReader()
{

}


vtkSmartPointer<vtkImageData> ImageReader::GetImage()
{
    if(mpVtkImage)
    {
        return mpVtkImage;
    }
    else
    {
        EXCEPTION("No image data has been set.");
    }
}

void ImageReader::SetFilename(const std::string& filename)
{
    mFilepath = filename;
}

void ImageReader::SetImageResizeFactors(double factorX, double factorY, double factorZ)
{
    mResizeX = factorX;
    mResizeY = factorY;
    mResizeZ = factorZ;
}

void ImageReader::Read()
{
    // Get the file extension
    if(mFilepath == "")
    {
        EXCEPTION("Input file not specified for image reader");
    }
    std::string file_extension  = boost::filesystem::extension(mFilepath);

    if(file_extension == ".tif" or file_extension == ".tiff" or file_extension == ".TIF" or file_extension == ".TIFF")
    {
        vtkSmartPointer<vtkTIFFReader> p_reader = vtkSmartPointer<vtkTIFFReader>::New();
        p_reader->SetFileName(mFilepath.c_str());
        if(mResizeX==1.0 and mResizeY==1.0 and mResizeZ==1.0)
        {
            p_reader->Update();
            mpVtkImage = p_reader->GetOutput();
        }
        else
        {
            vtkSmartPointer<vtkImageResize> p_resize = vtkSmartPointer<vtkImageResize>::New();
            p_resize->SetInputConnection(p_reader->GetOutputPort());
            p_resize->SetMagnificationFactors(mResizeX, mResizeY, mResizeZ);
            p_resize->SetResizeMethodToMagnificationFactors();
            p_resize->Update();
            mpVtkImage = p_resize->GetOutput();
        }
    }
    else if(file_extension == ".png" or file_extension == ".PNG")
    {
        vtkSmartPointer<vtkPNGReader> p_reader = vtkSmartPointer<vtkPNGReader>::New();
        p_reader->SetFileName(mFilepath.c_str());
        if(mResizeX==1.0 and mResizeY==1.0 and mResizeZ==1.0)
        {
            p_reader->Update();

            // RGB to scalar
            vtkSmartPointer<vtkImageLuminance> p_lum = vtkSmartPointer<vtkImageLuminance>::New();
            p_lum->SetInputConnection(p_reader->GetOutputPort());
            p_lum->Update();
            mpVtkImage = p_lum->GetOutput();
        }
        else
        {
            vtkSmartPointer<vtkImageResize> p_resize = vtkSmartPointer<vtkImageResize>::New();
            p_resize->SetInputConnection(p_reader->GetOutputPort());
            p_resize->SetMagnificationFactors(mResizeX, mResizeY, mResizeZ);
            p_resize->SetResizeMethodToMagnificationFactors();
            p_resize->Update();

            // RGB to scalar
            vtkSmartPointer<vtkImageLuminance> p_lum = vtkSmartPointer<vtkImageLuminance>::New();
            p_lum->SetInputConnection(p_resize->GetOutputPort());
            p_lum->Update();
            mpVtkImage = p_lum->GetOutput();
        }
    }
    else if(file_extension == ".jpg" or file_extension == ".JPG")
    {
        vtkSmartPointer<vtkJPEGReader> p_reader = vtkSmartPointer<vtkJPEGReader>::New();
        p_reader->SetFileName(mFilepath.c_str());
        if(mResizeX==1.0 and mResizeY==1.0 and mResizeZ==1.0)
        {
            p_reader->Update();
            mpVtkImage = p_reader->GetOutput();
        }
        else
        {
            vtkSmartPointer<vtkImageResize> p_resize = vtkSmartPointer<vtkImageResize>::New();
            p_resize->SetInputConnection(p_reader->GetOutputPort());
            p_resize->SetMagnificationFactors(mResizeX, mResizeY, mResizeZ);
            p_resize->SetResizeMethodToMagnificationFactors();
            p_resize->Update();
            mpVtkImage = p_resize->GetOutput();
        }
    }
    else if(file_extension == ".bmp" or file_extension == ".BMP")
    {
        vtkSmartPointer<vtkBMPReader> p_reader = vtkSmartPointer<vtkBMPReader>::New();
        p_reader->SetFileName(mFilepath.c_str());
        if(mResizeX==1.0 and mResizeY==1.0 and mResizeZ==1.0)
        {
            p_reader->Update();
            mpVtkImage = p_reader->GetOutput();
        }
        else
        {
            vtkSmartPointer<vtkImageResize> p_resize = vtkSmartPointer<vtkImageResize>::New();
            p_resize->SetInputConnection(p_reader->GetOutputPort());
            p_resize->SetMagnificationFactors(mResizeX, mResizeY, mResizeZ);
            p_resize->SetResizeMethodToMagnificationFactors();
            p_resize->Update();
            mpVtkImage = p_resize->GetOutput();
        }
    }
    else
    {
        EXCEPTION("Input file extension not recognized");
    }

    if(!mpVtkImage)
    {
        EXCEPTION("Image reading failed.");
    }
}