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vtkImageAccumulate.cxx
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vtkImageAccumulate.cxx
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/*=========================================================================
Program: Visualization Toolkit
Module: vtkImageAccumulate.cxx
Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
All rights reserved.
See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
#include "vtkImageAccumulate.h"
#include "vtkImageData.h"
#include "vtkImageStencilData.h"
#include "vtkImageStencilIterator.h"
#include "vtkInformation.h"
#include "vtkInformationVector.h"
#include "vtkMath.h"
#include "vtkObjectFactory.h"
#include "vtkStreamingDemandDrivenPipeline.h"
#include <math.h>
vtkStandardNewMacro(vtkImageAccumulate);
//----------------------------------------------------------------------------
// Constructor sets default values
vtkImageAccumulate::vtkImageAccumulate()
{
for (int idx = 0; idx < 3; ++idx)
{
this->ComponentSpacing[idx] = 1.0;
this->ComponentOrigin[idx] = 0.0;
this->ComponentExtent[idx*2] = 0;
this->ComponentExtent[idx*2+1] = 0;
}
this->ComponentExtent[1] = 255;
this->ReverseStencil = 0;
this->Min[0] = this->Min[1] = this->Min[2] = 0.0;
this->Max[0] = this->Max[1] = this->Max[2] = 0.0;
this->Mean[0] = this->Mean[1] = this->Mean[2] = 0.0;
this->StandardDeviation[0] = this->StandardDeviation[1] =
this->StandardDeviation[2] = 0.0;
this->VoxelCount = 0;
this->IgnoreZero = 0;
// we have the image input and the optional stencil input
this->SetNumberOfInputPorts(2);
}
//----------------------------------------------------------------------------
vtkImageAccumulate::~vtkImageAccumulate()
{
}
//----------------------------------------------------------------------------
void vtkImageAccumulate::SetComponentExtent(int extent[6])
{
int idx, modified = 0;
for (idx = 0; idx < 6; ++idx)
{
if (this->ComponentExtent[idx] != extent[idx])
{
this->ComponentExtent[idx] = extent[idx];
modified = 1;
}
}
if (modified)
{
this->Modified();
}
}
//----------------------------------------------------------------------------
void vtkImageAccumulate::SetComponentExtent(int minX, int maxX,
int minY, int maxY,
int minZ, int maxZ)
{
int extent[6];
extent[0] = minX; extent[1] = maxX;
extent[2] = minY; extent[3] = maxY;
extent[4] = minZ; extent[5] = maxZ;
this->SetComponentExtent(extent);
}
//----------------------------------------------------------------------------
void vtkImageAccumulate::GetComponentExtent(int extent[6])
{
for (int idx = 0; idx < 6; ++idx)
{
extent[idx] = this->ComponentExtent[idx];
}
}
//----------------------------------------------------------------------------
void vtkImageAccumulate::SetStencilData(vtkImageStencilData *stencil)
{
this->SetInputData(1, stencil);
}
//----------------------------------------------------------------------------
vtkImageStencilData *vtkImageAccumulate::GetStencil()
{
if (this->GetNumberOfInputConnections(1) < 1)
{
return 0;
}
return vtkImageStencilData::SafeDownCast(
this->GetExecutive()->GetInputData(1, 0));
}
//----------------------------------------------------------------------------
// This templated function executes the filter for any type of data.
template <class T>
void vtkImageAccumulateExecute(vtkImageAccumulate *self,
vtkImageData *inData, T *,
vtkImageData *outData, vtkIdType *outPtr,
double min[3], double max[3],
double mean[3],
double standardDeviation[3],
vtkIdType *voxelCount,
int* updateExtent)
{
// variables used to compute statistics (filter handles max 3 components)
double sum[3];
sum[0] = sum[1] = sum[2] = 0.0;
double sumSqr[3];
sumSqr[0] = sumSqr[1] = sumSqr[2] = 0.0;
min[0] = min[1] = min[2] = VTK_DOUBLE_MAX;
max[0] = max[1] = max[2] = VTK_DOUBLE_MIN;
standardDeviation[0] = standardDeviation[1] = standardDeviation[2] = 0.0;
*voxelCount = 0;
// input's number of components is used as output dimensionality
int numC = inData->GetNumberOfScalarComponents();
// get information for output data
int outExtent[6];
outData->GetExtent(outExtent);
vtkIdType outIncs[3];
outData->GetIncrements(outIncs);
double origin[3];
outData->GetOrigin(origin);
double spacing[3];
outData->GetSpacing(spacing);
// zero count in every bin
vtkIdType size = 1;
size *= (outExtent[1] - outExtent[0] + 1);
size *= (outExtent[3] - outExtent[2] + 1);
size *= (outExtent[5] - outExtent[4] + 1);
for (vtkIdType j = 0; j < size; j++)
{
outPtr[j] = 0;
}
vtkImageStencilData *stencil = self->GetStencil();
bool reverseStencil = (self->GetReverseStencil() != 0);
bool ignoreZero = (self->GetIgnoreZero() != 0);
vtkImageStencilIterator<T> inIter(inData, stencil, updateExtent, self);
while (!inIter.IsAtEnd())
{
if (inIter.IsInStencil() ^ reverseStencil)
{
T *inPtr = inIter.BeginSpan();
T *spanEndPtr = inIter.EndSpan();
while (inPtr != spanEndPtr)
{
// find the bin for this pixel.
bool outOfBounds = false;
vtkIdType *outPtrC = outPtr;
for (int idxC = 0; idxC < numC; ++idxC)
{
double v = static_cast<double>(*inPtr++);
if (!ignoreZero || v != 0)
{
// gather statistics
sum[idxC] += v;
sumSqr[idxC] += v*v;
if (v > max[idxC])
{
max[idxC] = v;
}
if (v < min[idxC])
{
min[idxC] = v;
}
(*voxelCount)++;
}
// compute the index
int outIdx = vtkMath::Floor((v - origin[idxC]) / spacing[idxC]);
// verify that it is in range
if (outIdx >= outExtent[idxC*2] && outIdx <= outExtent[idxC*2+1])
{
outPtrC += (outIdx - outExtent[idxC*2]) * outIncs[idxC];
}
else
{
outOfBounds = true;
}
}
// increment the bin
if (!outOfBounds)
{
++(*outPtrC);
}
}
}
inIter.NextSpan();
}
// initialize the statistics
mean[0] = 0;
mean[1] = 0;
mean[2] = 0;
standardDeviation[0] = 0;
standardDeviation[1] = 0;
standardDeviation[2] = 0;
if (*voxelCount != 0) // avoid the div0
{
double n = static_cast<double>(*voxelCount);
mean[0] = sum[0]/n;
mean[1] = sum[1]/n;
mean[2] = sum[2]/n;
if (*voxelCount - 1 != 0) // avoid the div0
{
double m = static_cast<double>(*voxelCount - 1);
standardDeviation[0] = sqrt((sumSqr[0] - mean[0]*mean[0]*n)/m);
standardDeviation[1] = sqrt((sumSqr[1] - mean[1]*mean[1]*n)/m);
standardDeviation[2] = sqrt((sumSqr[2] - mean[2]*mean[2]*n)/m);
}
}
}
//----------------------------------------------------------------------------
// This method is passed a input and output Data, and executes the filter
// algorithm to fill the output from the input.
// It just executes a switch statement to call the correct function for
// the Datas data types.
int vtkImageAccumulate::RequestData(
vtkInformation* vtkNotUsed( request ),
vtkInformationVector** inputVector,
vtkInformationVector* outputVector)
{
void *inPtr;
void *outPtr;
// get the input
vtkInformation* in1Info = inputVector[0]->GetInformationObject(0);
vtkImageData *inData = vtkImageData::SafeDownCast(
in1Info->Get(vtkDataObject::DATA_OBJECT()));
int *uExt = in1Info->Get(vtkStreamingDemandDrivenPipeline::UPDATE_EXTENT());
// get the output
vtkInformation *outInfo = outputVector->GetInformationObject(0);
vtkImageData *outData = vtkImageData::SafeDownCast(
outInfo->Get(vtkDataObject::DATA_OBJECT()));
vtkDebugMacro(<<"Executing image accumulate");
// We need to allocate our own scalars since we are overriding
// the superclasses "Execute()" method.
outData->SetExtent(outInfo->Get(vtkStreamingDemandDrivenPipeline::WHOLE_EXTENT()));
outData->AllocateScalars(outInfo);
vtkDataArray *inArray = this->GetInputArrayToProcess(0,inputVector);
inPtr = inData->GetArrayPointerForExtent(inArray, uExt);
outPtr = outData->GetScalarPointer();
// Components turned into x, y and z
if (inData->GetNumberOfScalarComponents() > 3)
{
vtkErrorMacro("This filter can handle up to 3 components");
return 1;
}
// this filter expects that output is type int.
if (outData->GetScalarType() != VTK_ID_TYPE)
{
vtkErrorMacro(<< "Execute: out ScalarType " << outData->GetScalarType()
<< " must be vtkIdType\n");
return 1;
}
switch (inData->GetScalarType())
{
vtkTemplateMacro(vtkImageAccumulateExecute( this,
inData,
static_cast<VTK_TT *>(inPtr),
outData,
static_cast<vtkIdType *>(outPtr),
this->Min, this->Max,
this->Mean,
this->StandardDeviation,
&this->VoxelCount,
uExt ));
default:
vtkErrorMacro(<< "Execute: Unknown ScalarType");
return 1;
}
return 1;
}
//----------------------------------------------------------------------------
int vtkImageAccumulate::RequestInformation (
vtkInformation* vtkNotUsed(request),
vtkInformationVector** vtkNotUsed(inputVector),
vtkInformationVector* outputVector)
{
// get the info objects
vtkInformation* outInfo = outputVector->GetInformationObject(0);
outInfo->Set(vtkStreamingDemandDrivenPipeline::WHOLE_EXTENT(),
this->ComponentExtent,6);
outInfo->Set(vtkDataObject::ORIGIN(),this->ComponentOrigin,3);
outInfo->Set(vtkDataObject::SPACING(),this->ComponentSpacing,3);
vtkDataObject::SetPointDataActiveScalarInfo(outInfo, VTK_ID_TYPE, 1);
return 1;
}
//----------------------------------------------------------------------------
// Get ALL of the input.
int vtkImageAccumulate::RequestUpdateExtent (
vtkInformation* vtkNotUsed(request),
vtkInformationVector** inputVector,
vtkInformationVector* vtkNotUsed( outputVector ))
{
// get the info objects
vtkInformation* inInfo = inputVector[0]->GetInformationObject(0);
vtkInformation* stencilInfo = 0;
if(inputVector[1]->GetNumberOfInformationObjects() > 0)
{
stencilInfo = inputVector[1]->GetInformationObject(0);
}
// Use the whole extent of the first input as the update extent for
// both inputs. This way the stencil will be the same size as the
// input.
int extent[6] = {0,-1,0,-1,0,-1};
inInfo->Get(vtkStreamingDemandDrivenPipeline::WHOLE_EXTENT(), extent);
inInfo->Set(vtkStreamingDemandDrivenPipeline::UPDATE_EXTENT(), extent, 6);
if(stencilInfo)
{
stencilInfo->Set(vtkStreamingDemandDrivenPipeline::UPDATE_EXTENT(),
extent, 6);
}
return 1;
}
//----------------------------------------------------------------------------
int vtkImageAccumulate::FillInputPortInformation(
int port, vtkInformation* info)
{
if (port == 1)
{
info->Set(vtkAlgorithm::INPUT_REQUIRED_DATA_TYPE(), "vtkImageStencilData");
// the stencil input is optional
info->Set(vtkAlgorithm::INPUT_IS_OPTIONAL(), 1);
}
else
{
info->Set(vtkAlgorithm::INPUT_REQUIRED_DATA_TYPE(), "vtkImageData");
}
return 1;
}
//----------------------------------------------------------------------------
void vtkImageAccumulate::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os,indent);
os << indent << "Mean: ("
<< this->Mean[0] << ", "
<< this->Mean[1] << ", "
<< this->Mean[2] << ")\n";
os << indent << "Min: ("
<< this->Min[0] << ", "
<< this->Min[1] << ", "
<< this->Min[2] << ")\n";
os << indent << "Max: ("
<< this->Max[0] << ", "
<< this->Max[1] << ", "
<< this->Max[2] << ")\n";
os << indent << "StandardDeviation: ("
<< this->StandardDeviation[0] << ", "
<< this->StandardDeviation[1] << ", "
<< this->StandardDeviation[2] << ")\n";
os << indent << "VoxelCount: " << this->VoxelCount << "\n";
os << indent << "Stencil: " << this->GetStencil() << "\n";
os << indent << "ReverseStencil: " << (this->ReverseStencil ?
"On\n" : "Off\n");
os << indent << "IgnoreZero: " << (this->IgnoreZero ? "On" : "Off") << "\n";
os << indent << "ComponentOrigin: ( "
<< this->ComponentOrigin[0] << ", "
<< this->ComponentOrigin[1] << ", "
<< this->ComponentOrigin[2] << " )\n";
os << indent << "ComponentSpacing: ( "
<< this->ComponentSpacing[0] << ", "
<< this->ComponentSpacing[1] << ", "
<< this->ComponentSpacing[2] << " )\n";
os << indent << "ComponentExtent: ( "
<< this->ComponentExtent[0] << "," << this->ComponentExtent[1] << " "
<< this->ComponentExtent[2] << "," << this->ComponentExtent[3] << " "
<< this->ComponentExtent[4] << "," << this->ComponentExtent[5] << " }\n";
}