-
/**
* \file
- * \brief Class bbtk::ThresholdImageView .
+ * \author Eduardo Davila and Claire Mouton.
+ * \brief Class bbtk::ThresholdImageView.
+ * \date September 2012
*/
#include "ColorLayerImageView.h"
#include <vtkLookupTable.h>
#include <vtkImageData.h>
+#include <algorithm>
+
- //=========================================================================
- //=========================================================================
- //=========================================================================
- //=========================================================================
- ColorLayerImageView::ColorLayerImageView( )
- {
- _z2 = 0;
- _fix_dinamic = true;
- }
+//=========================================================================
+//=========================================================================
+//=========================================================================
+//=========================================================================
+ColorLayerImageView::ColorLayerImageView( )
+{
+ _z2 = 0;
+ _fix_dynamic = true;
+ _color_type = false;
+}
- //=========================================================================
- ColorLayerImageView::~ColorLayerImageView()
- {
- }
- //=========================================================================
+//=========================================================================
+ColorLayerImageView::~ColorLayerImageView()
+{
+}
+//=========================================================================
//----------------------------------------------------------------------------
-void ColorLayerImageView::SetSliceFixDinamic(bool fix_dinamic)
+void ColorLayerImageView::SetSliceFixDynamic(bool fix_dynamic)
{
- _fix_dinamic = fix_dinamic;
+ _fix_dynamic = fix_dynamic;
}
//----------------------------------------------------------------------------
void ColorLayerImageView::SetZ2(int z2)
{
- _z2 = z2;
+ _z2 = z2;
}
//----------------------------------------------------------------------------
int ColorLayerImageView::GetZ() // virtual
{
- int result=0;
- if (_fix_dinamic==false)
- {
- result = _z2;
- } else {
- result = LayerImageBase::GetZ();
- }
+ int result=0;
+ if (_fix_dynamic==false)
+ {
+ result = _z2;
+ }
+ else
+ {
+ result = LayerImageBase::GetZ();
+ }
+
+ return result;
+}
+
+//----------------------------------------------------------------------------
+void ColorLayerImageView::SetBaseColors(std::vector<double> & base_color)
+{
+ // The base color vector must be of a size multiple of 3, not null.
+ if (base_color.size() != 0 && base_color.size() % 3 == 0)
+ _base_color = base_color;
+ // Otherwise, an exception should be thrown.
+ else if (base_color.size() != 0)
+ std::cout << "CM ColorLayerImageView::SetBaseColors : ERROR!!! The base color vector has an inconsistent size. It must be of a size multiple of 3, different from 0, but its size is: "<< base_color.size() << "." << std::endl;
+}
+
+//----------------------------------------------------------------------------
+double ColorLayerImageView::GetBaseColors(unsigned int index)
+{
+ if (_base_color.size() > index)
+ return _base_color.at(index);
+ // An exception should be thrown if the index does not exist in the color vector.
+ else
+ {
+ std::cout << "CM ColorLayerImageView::GetBaseColors : ERROR!!! The index " << index << "is out of the base color vector range." << std ::endl;
+ return -1.0;
+ }
+}
+
+//----------------------------------------------------------------------------
+void ColorLayerImageView::SetGreyLevelBoundaries(std::vector<double> & grey_level_boundary)
+{
+ // The size must be greater than or equal to 2 (at least min and max must exist).
+ if ( grey_level_boundary.size() >= 2)
+ {
+ sort ( grey_level_boundary.begin(), grey_level_boundary.end() );
+ _grey_level_boundary = grey_level_boundary;
+ }
+ // Otherwise, an exception should be thrown.
+ else if (grey_level_boundary.size() != 0)
+ std::cout << "CM ColorLayerImageView::SetGreyLevelBoundaries : ERROR!!! The grey level boundaries vector has an inconsistent size. It must be of a size greater than or equal to 2 (at least min and max must exist), but its size is: " << grey_level_boundary.size() << "." << std::endl;
+}
- return result;
+//----------------------------------------------------------------------------
+double ColorLayerImageView::GetGreyLevelBoundaries(unsigned int index)
+{
+ if (_grey_level_boundary.size() > index)
+ return _grey_level_boundary.at(index);
+ // An exception should be thrown if the index does not exist in the grey level boundary vector.
+ else
+ {
+ std::cout << "CM ColorLayerImageView::GetGreyLevelBoundaries : ERROR!!! The index " << index << "is out of the grey level boundaries vector range." << std ::endl;
+ return -1.0;
+ }
}
+//----------------------------------------------------------------------------
+void ColorLayerImageView::SetPlainOrGradientColor(bool color_type)
+{
+ _color_type = color_type;
+}
+
+//----------------------------------------------------------------------------
+int ColorLayerImageView::GetBaseColorNb()
+{
+ return _base_color.size()/3;
+}
+
+//----------------------------------------------------------------------------
+void ColorLayerImageView::SetDefaultGreyLevelBoundary()
+{
+ // CM Sets the default behaviour concerning the lookup table keeping the base colors already set.
+ _grey_level_boundary.clear();
+
+ // This avoids a potential division by 0 through delta during the lookup table configuration.
+ if (_range[1]==0)
+ {
+ _range[1]=255;
+ }
+
+ // Grey level extrema are set by default to the image grey level extrema.
+ int minTot = floor (_range[0]);
+ int maxTot = ceil (_range[1]);
+
+ _grey_level_boundary.push_back((double)minTot);
+
+ // By default, the histogram is split into BaseColorNb areas of equal width.
+ double delta = (maxTot - minTot)/GetBaseColorNb();
+ for (int i = 1; i <= GetBaseColorNb() ; i ++)
+ {
+ _grey_level_boundary.push_back((double)minTot + i * delta);
+ }
+}
+
+//----------------------------------------------------------------------------
+void ColorLayerImageView::SetDefaultBaseColorAndGreyLevelBoundary()
+{
+ // CM Sets the default behaviour concerning the lookup table.
+ _grey_level_boundary.clear();
+ _base_color.clear();
+ // Base colors are set to blue, yellow and red.
+ // Blue.
+ _base_color.push_back(0.0);
+ _base_color.push_back(0.0);
+ _base_color.push_back(1.0);
+ // Yellow.
+ _base_color.push_back(1.0);
+ _base_color.push_back(1.0);
+ _base_color.push_back(0.0);
+ // Red.
+ _base_color.push_back(1.0);
+ _base_color.push_back(0.0);
+ _base_color.push_back(0.0);
+
+ // This avoids a potential division by 0 through delta during the lookup table configuration.
+ if (_range[1]==0)
+ {
+ _range[1]=255;
+ }
+
+ int minTot = floor (_range[0]);
+ int maxTot = ceil (_range[1]);
+
+ _grey_level_boundary.push_back((double)minTot);
+
+ // By default, the histogram is split into three areas of equal width.
+ double delta = (maxTot - minTot)/3.0;
+ _grey_level_boundary.push_back(minTot + delta);
+ _grey_level_boundary.push_back(minTot + 2*delta);
+
+ _grey_level_boundary.push_back((double)maxTot);
+}
//----------------------------------------------------------------------------
void ColorLayerImageView::ConfigLookupTable() // virtual
{
- double range[2];
+ // CM
+ // Grey level extrema retrieved from the image grey level extrema.
+ GetImage()->GetScalarRange(_range);
+
+
+ // ------------------ Setting Default Values
+ // Checks the size consistency of vectors _base_color and _grey_level_boundary.
+ // In case of inconsistency, an exception should be thrown. Instead, the default values are set.
+ if (GetBaseColorNb() == 0)
+ SetDefaultBaseColorAndGreyLevelBoundary();
+
+ // If at least one color has been set, set the grey level boundaries to build an equipartition of the image grey levels, keeping the base colors defined.
+ else
+ if (GetBaseColorNb() != (_grey_level_boundary.size() - 1) )
+ {
+ std::cout << "CM ColorLayerImageView::ConfigLookupTable : ERROR!!! Inconsistency between the sizes of vectors _base_color and _grey_level_boundary. _base_color.size()/3 (=" <<_base_color.size()/3 << ") should be equal to _grey_level_boundary.size() - 1 (=" << _grey_level_boundary.size() - 1 << ")." << std::endl;
+ std::cout << "CM The default values for the base colors and the grey level boundaries will be set." << std::endl;
+ SetDefaultGreyLevelBoundary();
+ }
+ // ------------------ End Of Setting Default Values
+
+
+ // ------------------ Defining the Threshold Table
+ vtkLookupTable* thresholdTable = GetThresholdTable();
+
+ // CM Number of table values consistent with the effective number of values (see loop below).
+ thresholdTable->SetNumberOfTableValues(std::max( GetGreyLevelBoundaries( GetBaseColorNb() ), ceil(_range[1]) ) - std::min( GetGreyLevelBoundaries(0), floor(_range[0]) ) + 1);
+ thresholdTable->SetTableRange(_range);
+ thresholdTable->SetAlphaRange(0, 1);
+ thresholdTable->SetValueRange(0, 1);
+ thresholdTable->SetSaturationRange(0, 0);
+ thresholdTable->SetRampToLinear( );
+
+ // Defines the lookup table.
+ // If the image has a degradation in one (or both) extremum (lower or higher),
+ // sets the corresponding grey levels as transparent white in the lookup table.
+ for (int i = floor(_range[0]); i <= GetGreyLevelBoundaries(0); i++)
+ {
+ thresholdTable -> SetTableValue( i, 0, 0, 0, 0);
+ }
+ for (int i = GetGreyLevelBoundaries( GetBaseColorNb() ) + 1 ; i <= ceil(_range[1]); i++)
+ {
+ thresholdTable -> SetTableValue( i, 0, 0, 0, 0);
+ }
- GetImage()->GetScalarRange(range);
- if (range[1]==0)
+ int delta;
+
+ // _color_type true, i.e. plain colors.
+ // Sets the plain color for each grey level interval.
+ if (_color_type)
+ {
+ for (int i = 0; i < GetBaseColorNb(); i++)
{
- range[1]=255;
+ delta = GetGreyLevelBoundaries(i+1) - GetGreyLevelBoundaries(i);
+ for (int ii = 1; ii <= delta; ii++)
+ {
+ thresholdTable->SetTableValue(GetGreyLevelBoundaries(i) + ii,
+ GetBaseColors(i*3),
+ GetBaseColors(i*3 + 1),
+ GetBaseColors(i*3 + 2),
+ 1);
+ }
}
-
- int minTot = floor (range[0]);
- int maxTot = ceil (range[1]);
-
+ } // End Of if (_color_type)
- vtkLookupTable* thresholdTable = GetThresholdTable();
- thresholdTable->SetNumberOfTableValues(maxTot+1);
- thresholdTable->SetTableRange(range);
- thresholdTable->SetAlphaRange(0, 1);
- thresholdTable->SetValueRange(0, 1);
- thresholdTable->SetSaturationRange(0, 0);
- thresholdTable->SetRampToLinear( );
-
- //Assign a fake color for the upper image, and set the white as transparent
- int i,ii;
- double iBlue=0 , iYellow=0 , iRed=0;
- double delta=(maxTot-minTot)/3.0;
-
- double delta0=delta*0;
- double delta1=delta*1;
- double delta2=delta*2;
- double delta3=maxTot;
-
- for(i = minTot; i <= maxTot; i++)
+
+ // _color_type false, i.e. gradient color
+ else
+ {
+ // First color:
+ // Creates a linear range from white to the first color.
+ delta = GetGreyLevelBoundaries(1) - GetGreyLevelBoundaries(0);
+ for (int ii = 1; ii <= delta ; ii++)
{
- ii=i-minTot;
- if ((ii>=delta0) && (ii<=delta1)) // iBlue
- {
- thresholdTable->SetTableValue( i , 0 , 0 , iBlue/delta , 1);
- if (ii==0)
- {
- thresholdTable->SetTableValue( i , 0 , 0 , iBlue/delta , 0);
- } else {
- thresholdTable->SetTableValue( i , 0 , 0 , iBlue/delta , 1);
- }
- iBlue++;
- }
- if ((ii>=delta1) && (ii<=delta2)) // iYellow
- {
- thresholdTable->SetTableValue( i , iYellow/delta , iYellow/delta , (delta-iYellow)/delta , 1);
- iYellow++;
- }
- if ((ii>=delta2) && (ii<=delta3)) // iRed
+ thresholdTable->SetTableValue( GetGreyLevelBoundaries(0) + ii, GetBaseColors(0) * ii/delta,
+ GetBaseColors(1) * ii/delta, GetBaseColors(2) * ii/delta, 1);
+ }
+
+ // If other colors exist:
+ // Creates linear ranges between one color and the following in the color vector.
+ if (GetBaseColorNb() > 1)
+ {
+ for (int i = 1; i < GetBaseColorNb(); i++)
+ {
+ delta = GetGreyLevelBoundaries(i+1) - GetGreyLevelBoundaries(i);
+ for (int ii = 1; ii <= delta; ii++)
{
- thresholdTable->SetTableValue( i , 1, (delta-iRed)/delta , 0 , 1);
- iRed++;
+ // Color computation : previous_color + (current_color - previous_color)/delta * ii
+ thresholdTable->SetTableValue(GetGreyLevelBoundaries(i) + ii,
+ GetBaseColors((i-1)*3) + (GetBaseColors(i*3) - GetBaseColors((i-1)*3)) / delta * ii ,
+ GetBaseColors((i-1)*3 + 1) + (GetBaseColors(i*3 + 1) - GetBaseColors((i-1)*3 + 1)) / delta * ii ,
+ GetBaseColors((i-1)*3 + 2) + (GetBaseColors(i*3 + 2) - GetBaseColors((i-1)*3 + 2)) / delta * ii ,
+ 1);
}
- } // for
-
- thresholdTable->Build( );
+ }
+ }
+ } // End Of if (!_color_type)
+
+ thresholdTable->Build( );
+ // ------------------ End Of Defining the Threshold Table
+ //EO CM
}
-
-
-
// EOF
git://git.creatis.insa-lyon.fr / creaMaracasVisu.git / commitdiff