VtkGeoImageSource Class Reference

Detailed Description

The VtkVisPipeline source object of a geo-referenced image (file).

Definition at line 28 of file VtkGeoImageSource.h.

#include <VtkGeoImageSource.h>

Inheritance diagram for VtkGeoImageSource:

Collaboration diagram for VtkGeoImageSource:

Public Member Functions
	vtkTypeMacro (VtkGeoImageSource, vtkSimpleImageToImageFilter)
void	PrintSelf (ostream &os, vtkIndent indent) override
	Prints information about itself.
	VtkGeoImageSource (const VtkGeoImageSource &)=delete
void	operator= (const VtkGeoImageSource &)=delete
vtkImageData *	getImageData ()
	Returns the ImageData object.
bool	readImage (const QString &filename)
	Reads an image from file.
void	setImage (vtkImageAlgorithm *image, const QString &name)
	Imports an existing image object.
void	SetUserProperty (QString name, QVariant value) override
	Sets a user property. This should be implemented by subclasses.
Public Member Functions inherited from VtkAlgorithmProperties
	VtkAlgorithmProperties (QObject *parent=nullptr)
	Constructor (sets default values)
	~VtkAlgorithmProperties () override
vtkProperty *	GetProperties () const
	Returns the vtk properties.
vtkTexture *	GetTexture ()
	Returns a texture (if one has been assigned).
void	SetTexture (vtkTexture *t)
	Sets a texture for the VtkVisPipelineItem.
vtkLookupTable *	GetLookupTable (const QString &array_name)
	Returns the colour lookup table (if one has been assigned).
void	RemoveLookupTable (const QString &array_name)
	Removes the lookup table for the given scalar.
void	SetLookUpTable (const QString &array_name, vtkLookupTable *lut)
	Sets a colour lookup table for the given scalar array of the VtkVisPipelineItem.
void	SetLookUpTable (const QString &array_name, const QString &filename)
	Loads a predefined color lookup table from a file for the specified scalar array.
bool	GetScalarVisibility () const
	Returns the scalar visibility.
void	SetScalarVisibility (bool on)
	Sets the scalar visibility.
QString	GetName () const
	Returns the name. This is set to the file path if it is a source algorithm.
void	SetName (QString name)
	Sets the name.
bool	IsRemovable () const
	Is this algorithm removable from the pipeline (view).
QMap< QString, QVariant > *	GetAlgorithmUserProperties () const
	Returns a map of user properties.
QMap< QString, QList< QVariant > > *	GetAlgorithmUserVectorProperties () const
	Returns a map of vector user properties.
QVariant	GetUserProperty (QString name) const
	Returns the value of a user property.
virtual void	SetUserVectorProperty (QString name, QList< QVariant > values)
	Sets a vector user property. This should be implemented by subclasses.
QList< QVariant >	GetUserVectorProperty (QString name) const
	Returns a list of values of a vector user property.
void	SetActiveAttribute (QString name)
	Set the active attribute.
QString	GetActiveAttribute () const
	Returns the desired active attribute.

Static Public Member Functions
static VtkGeoImageSource *	New ()
	Create new objects with New() because of VTKs reference counting.
static std::optional< GeoLib::Raster >	convertToRaster (VtkGeoImageSource *const source)

Protected Member Functions
	VtkGeoImageSource ()
	Constructor.
	~VtkGeoImageSource () override
	Destructor.
void	SimpleExecute (vtkImageData *input, vtkImageData *output) override
	Filter execution.

Private Attributes
vtkImageAlgorithm *	_imageSource {nullptr}

Additional Inherited Members
Signals inherited from VtkAlgorithmProperties
void	ScalarVisibilityChanged (bool on)
Protected Attributes inherited from VtkAlgorithmProperties
vtkProperty *	_property
vtkTexture *	_texture
bool	_scalarVisibility
std::map< QString, vtkLookupTable * >	_lut
QString	_name
QString	_activeAttributeName
bool	_removable
QMap< QString, QVariant > *	_algorithmUserProperties
QMap< QString, QList< QVariant > > *	_algorithmUserVectorProperties

Constructor & Destructor Documentation

VtkGeoImageSource() [1/2]

VtkGeoImageSource::VtkGeoImageSource ( const VtkGeoImageSource & )

delete

References VtkGeoImageSource().

Referenced by VtkGeoImageSource(), convertToRaster(), New(), operator=(), and vtkTypeMacro().

VtkGeoImageSource() [2/2]

VtkGeoImageSource::VtkGeoImageSource ( )

protecteddefault

Constructor.

~VtkGeoImageSource()

VtkGeoImageSource::~VtkGeoImageSource ( )

overrideprotected

Destructor.

Definition at line 52 of file VtkGeoImageSource.cpp.

{
    if (_imageSource)
    {
        _imageSource->Delete();
    }
}

References _imageSource.

Member Function Documentation

convertToRaster()

std::optional< GeoLib::Raster > VtkGeoImageSource::convertToRaster ( VtkGeoImageSource *const source )

static

Definition at line 111 of file VtkGeoImageSource.cpp.

{
    int dims[3];
    source->GetOutput()->GetDimensions(dims);
    double origin[3];
    source->GetOutput()->GetOrigin(origin);
    double spacing[3];
    source->GetOutput()->GetSpacing(spacing);
    MathLib::Point3d const origin_pnt(
        std::array<double, 3>{{origin[0] - 0.5 * spacing[0],
                               origin[1] - 0.5 * spacing[1], origin[2]}});
    GeoLib::RasterHeader const header = {static_cast<std::size_t>(dims[0]),
                                         static_cast<std::size_t>(dims[1]),
                                         static_cast<std::size_t>(dims[2]),
                                         origin_pnt,
                                         spacing[0],
                                         -9999};
 
    vtkSmartPointer<vtkDataArray> const pixelData =
        vtkSmartPointer<vtkDataArray>(
            source->GetOutput()->GetPointData()->GetScalars());
    int const nTuple = pixelData->GetNumberOfComponents();
    if (nTuple < 1 || nTuple > 4)
    {
        ERR("VtkMeshConverter::convertImgToMesh(): Unsupported pixel "
            "composition!");
        return {};
    }
 
    std::vector<double> pix(header.n_cols * header.n_rows * header.n_depth, 0);
    for (std::size_t k = 0; k < header.n_depth; k++)
    {
        std::size_t const layer_idx = (k * header.n_rows * header.n_cols);
        for (std::size_t i = 0; i < header.n_rows; i++)
        {
            std::size_t const idx = i * header.n_cols + layer_idx;
            for (std::size_t j = 0; j < header.n_cols; j++)
            {
                double const* const colour = pixelData->GetTuple(idx + j);
                bool const visible = (nTuple == 2 || nTuple == 4)
                                         ? (colour[nTuple - 1] != 0)
                                         : true;
                if (!visible)
                {
                    pix[idx + j] = header.no_data;
                }
                else
                {
                    pix[idx + j] = (nTuple < 3) ? colour[0] :  // grey (+ alpha)
                                       (0.3 * colour[0] + 0.6 * colour[1] +
                                        0.1 * colour[2]);  // rgb(a)
                }
            }
        }
    }
 
    return std::make_optional<GeoLib::Raster>(header, pix.begin(), pix.end());
}

References VtkGeoImageSource(), and ERR().

Referenced by VtkVisPipelineView::showImageToMeshConversionDialog(), and VtkVisImageItem::writeAsRaster().

getImageData()

vtkImageData * VtkGeoImageSource::getImageData

(

)

Returns the ImageData object.

Definition at line 83 of file VtkGeoImageSource.cpp.

{
    return this->_imageSource->GetImageDataInput(0);
}

References _imageSource.

New()

VtkGeoImageSource * VtkGeoImageSource::New ( )

static

Create new objects with New() because of VTKs reference counting.

References VtkGeoImageSource().

Referenced by NetCdfConfigureDialog::createDataObject(), and MainWindow::loadFile().

operator=()

void VtkGeoImageSource::operator= ( const VtkGeoImageSource & )

delete

References VtkGeoImageSource().

PrintSelf()

void VtkGeoImageSource::PrintSelf ( ostream & os, vtkIndent indent )

override

Prints information about itself.

Definition at line 60 of file VtkGeoImageSource.cpp.

{
    this->Superclass::PrintSelf(os, indent);
}

readImage()

bool VtkGeoImageSource::readImage

(

const QString &

filename

)

Reads an image from file.

Definition at line 65 of file VtkGeoImageSource.cpp.

{
    vtkImageAlgorithm* img(VtkRaster::loadImage(filename.toStdString()));
    if (img == nullptr)
    {
        return false;
    }
    this->setImage(img, filename);
    return true;
}

References VtkRaster::loadImage(), and setImage().

Referenced by MainWindow::loadFile().

setImage()

void VtkGeoImageSource::setImage	(	vtkImageAlgorithm *	image,
		const QString &	name )

Imports an existing image object.

Definition at line 76 of file VtkGeoImageSource.cpp.

{
    this->_imageSource = image;
    this->SetInputConnection(_imageSource->GetOutputPort());
    this->SetName(name);
}

References _imageSource, and VtkAlgorithmProperties::SetName().

Referenced by readImage().

SetUserProperty()

void VtkGeoImageSource::SetUserProperty ( QString name, QVariant value )

overridevirtual

Sets a user property. This should be implemented by subclasses.

Reimplemented from VtkAlgorithmProperties.

Definition at line 105 of file VtkGeoImageSource.cpp.

{
    Q_UNUSED(name);
    Q_UNUSED(value);
}

SimpleExecute()

void VtkGeoImageSource::SimpleExecute ( vtkImageData * input, vtkImageData * output )

overrideprotected

Filter execution.

Definition at line 88 of file VtkGeoImageSource.cpp.

{
    vtkDebugMacro(<< "Executing VtkGeoImageSource");
    void* inPtr = input->GetScalarPointer();
    void* outPtr = output->GetScalarPointer();
    switch (output->GetScalarType())
    {
        // This is simply a #define for a big case list.
        // It handles all data types that VTK supports.
        vtkTemplateMacro(vtkSimpleImageFilterExampleExecute(
            input, output, (VTK_TT*)(inPtr), (VTK_TT*)(outPtr)));
        default:
            vtkGenericWarningMacro("Execute: Unknown input ScalarType");
            return;
    }
}

References vtkSimpleImageFilterExampleExecute().

vtkTypeMacro()

VtkGeoImageSource::vtkTypeMacro	(	VtkGeoImageSource	,
		vtkSimpleImageToImageFilter	)

References VtkGeoImageSource().

Member Data Documentation

_imageSource

vtkImageAlgorithm* VtkGeoImageSource::_imageSource {nullptr}

private

Definition at line 68 of file VtkGeoImageSource.h.

{nullptr};

Referenced by ~VtkGeoImageSource(), getImageData(), and setImage().

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The documentation for this class was generated from the following files:

• VtkGeoImageSource.h
• VtkGeoImageSource.cpp