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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
/**
* @class vtkImageMapToWindowLevelColors
* @brief Map an image through a lookup table and/or a window/level.
*
* The vtkImageMapToWindowLevelColors filter can be used to perform
* the following operations depending on its settings:
* -# If no lookup table is provided, and if the input data has a single
* component (any numerical scalar type is allowed), then the data is
* mapped through the specified Window/Level. The type of the output
* scalars will be "unsigned char" with a range of (0,255).
* -# If no lookup table is provided, and if the input data is already
* unsigned char, and if the Window/Level is set to 255.0/127.5, then
* the input data will be passed directly to the output.
* -# If a lookup table is provided, then the first component of the
* input data is mapped through the lookup table (using the Range of
* the lookup table), and the resulting color is modulated according
* to the Window/Level. For example, if the input value is 500 and
* the Window/Level are 2000/1000, the output value will be RGB*0.25
* where RGB is the color assigned by the lookup table and 0.25 is
* the modulation factor.
* See SetWindow() and SetLevel() for the equations used for modulation.
* To map scalars through a lookup table without modulating the resulting
* color, use vtkImageMapToColors instead of this filter.
* @sa
* vtkLookupTable vtkScalarsToColors
*/
#ifndef vtkImageMapToWindowLevelColors_h
#define vtkImageMapToWindowLevelColors_h
#include "vtkImageMapToColors.h"
#include "vtkImagingColorModule.h" // For export macro
VTK_ABI_NAMESPACE_BEGIN
class VTKIMAGINGCOLOR_EXPORT vtkImageMapToWindowLevelColors : public vtkImageMapToColors
{
public:
static vtkImageMapToWindowLevelColors* New();
vtkTypeMacro(vtkImageMapToWindowLevelColors, vtkImageMapToColors);
void PrintSelf(ostream& os, vtkIndent indent) override;
///@{
/**
* Set / Get the Window to use -> modulation will be performed on the
* color based on (S - (L - W/2))/W where S is the scalar value, L is
* the level and W is the window.
*/
vtkSetMacro(Window, double);
vtkGetMacro(Window, double);
///@}
///@{
/**
* Set / Get the Level to use -> modulation will be performed on the
* color based on (S - (L - W/2))/W where S is the scalar value, L is
* the level and W is the window.
*/
vtkSetMacro(Level, double);
vtkGetMacro(Level, double);
///@}
protected:
vtkImageMapToWindowLevelColors();
~vtkImageMapToWindowLevelColors() override;
int RequestInformation(vtkInformation*, vtkInformationVector**, vtkInformationVector*) override;
void ThreadedRequestData(vtkInformation* request, vtkInformationVector** inputVector,
vtkInformationVector* outputVector, vtkImageData*** inData, vtkImageData** outData,
int outExt[6], int id) override;
int RequestData(vtkInformation* request, vtkInformationVector** inputVector,
vtkInformationVector* outputVector) override;
double Window;
double Level;
private:
vtkImageMapToWindowLevelColors(const vtkImageMapToWindowLevelColors&) = delete;
void operator=(const vtkImageMapToWindowLevelColors&) = delete;
};
VTK_ABI_NAMESPACE_END
#endif
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