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341 lines
11 KiB
341 lines
11 KiB
/*=========================================================================
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Program: Visualization Toolkit
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Module: $RCSfile: vtkImageNonMaximumSuppression.cxx,v $
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Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
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All rights reserved.
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See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
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This software is distributed WITHOUT ANY WARRANTY; without even
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the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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PURPOSE. See the above copyright notice for more information.
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=========================================================================*/
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#include "vtkImageNonMaximumSuppression.h"
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#include "vtkImageData.h"
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#include "vtkInformation.h"
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#include "vtkInformationVector.h"
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#include "vtkObjectFactory.h"
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#include "vtkStreamingDemandDrivenPipeline.h"
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#include "vtkPointData.h"
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#include <math.h>
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vtkCxxRevisionMacro(vtkImageNonMaximumSuppression, "$Revision: 1.55 $");
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vtkStandardNewMacro(vtkImageNonMaximumSuppression);
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//----------------------------------------------------------------------------
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// Construct an instance of vtkImageNonMaximumSuppression fitler.
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vtkImageNonMaximumSuppression::vtkImageNonMaximumSuppression()
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{
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this->Dimensionality= 2;
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this->HandleBoundaries = 1;
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this->SetNumberOfInputPorts(2);
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}
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//----------------------------------------------------------------------------
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// This method is passed a region that holds the image extent of this filters
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// input, and changes the region to hold the image extent of this filters
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// output.
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int vtkImageNonMaximumSuppression::RequestInformation (
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vtkInformation * vtkNotUsed(request),
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vtkInformationVector **inputVector,
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vtkInformationVector *outputVector)
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{
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// get the info objects
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vtkInformation* outInfo = outputVector->GetInformationObject(0);
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vtkInformation *inInfo = inputVector[0]->GetInformationObject(0);
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int extent[6];
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int idx;
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inInfo->Get(vtkStreamingDemandDrivenPipeline::WHOLE_EXTENT(),extent);
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if ( ! this->HandleBoundaries)
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{
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// shrink output image extent.
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for (idx = 0; idx < this->Dimensionality; ++idx)
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{
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extent[idx*2] += 1;
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extent[idx*2+1] -= 1;
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}
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}
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outInfo->Set(vtkStreamingDemandDrivenPipeline::WHOLE_EXTENT(),extent,6);
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return 1;
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}
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//----------------------------------------------------------------------------
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// This method computes the input extent necessary to generate the output.
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int vtkImageNonMaximumSuppression::RequestUpdateExtent (
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vtkInformation * vtkNotUsed(request),
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vtkInformationVector **inputVector,
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vtkInformationVector *outputVector)
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{
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// get the info objects
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vtkInformation* outInfo = outputVector->GetInformationObject(0);
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vtkInformation* inInfo = inputVector[0]->GetInformationObject(0);
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vtkInformation* inInfo2 = inputVector[1]->GetInformationObject(0);
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int *wholeExtent;
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int idx;
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// get the whole image for input 2
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int inExt[6];
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outInfo->Get(vtkStreamingDemandDrivenPipeline::UPDATE_EXTENT(),inExt);
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wholeExtent = inInfo->Get(vtkStreamingDemandDrivenPipeline::WHOLE_EXTENT());
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inInfo2->Set(vtkStreamingDemandDrivenPipeline::UPDATE_EXTENT(),inExt,6);
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// grow input image extent for input 0
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for (idx = 0; idx < this->Dimensionality; ++idx)
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{
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inExt[idx*2] -= 1;
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inExt[idx*2+1] += 1;
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if (this->HandleBoundaries)
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{
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// we must clip extent with whole extent if we hanlde boundaries.
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if (inExt[idx*2] < wholeExtent[idx*2])
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{
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inExt[idx*2] = wholeExtent[idx*2];
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}
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if (inExt[idx*2 + 1] > wholeExtent[idx*2 + 1])
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{
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inExt[idx*2 + 1] = wholeExtent[idx*2 + 1];
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}
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}
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}
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inInfo->Set(vtkStreamingDemandDrivenPipeline::UPDATE_EXTENT(),inExt,6);
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return 1;
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}
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//----------------------------------------------------------------------------
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// This templated function executes the filter for any type of data.
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// Handles the two input operations
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template <class T>
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void vtkImageNonMaximumSuppressionExecute(vtkImageNonMaximumSuppression *self,
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vtkImageData *in1Data, T *in1Ptr,
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vtkImageData *in2Data,
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T *in2Ptr,
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vtkImageData *outData,
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T *outPtr,
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int outExt[6], int id)
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{
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int idxC, idxX, idxY, idxZ;
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int maxC, maxX, maxY, maxZ;
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vtkIdType inIncX, inIncY, inIncZ;
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vtkIdType in2IncX, in2IncY, in2IncZ;
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vtkIdType outIncX, outIncY, outIncZ;
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unsigned long count = 0;
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unsigned long target;
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int useZMin, useZMax, useYMin, useYMax, useXMin, useXMax;
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double d, normalizeFactor, vector[3], *ratio;
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int neighborA, neighborB;
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int *wholeExtent;
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vtkIdType *inIncs;
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int axesNum;
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// find the region to loop over
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maxC = outData->GetNumberOfScalarComponents();
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maxX = outExt[1] - outExt[0];
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maxY = outExt[3] - outExt[2];
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maxZ = outExt[5] - outExt[4];
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target = (unsigned long)((maxZ+1)*(maxY+1)/50.0);
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target++;
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// Get the dimensionality of the gradient.
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axesNum = self->GetDimensionality();
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// get some other info we need
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inIncs = in1Data->GetIncrements();
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wholeExtent = in1Data->GetExtent();
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// Get increments to march through data
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in1Data->GetContinuousIncrements(outExt, inIncX, inIncY, inIncZ);
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in2Data->GetContinuousIncrements(outExt, in2IncX, in2IncY, in2IncZ);
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outData->GetContinuousIncrements(outExt, outIncX, outIncY, outIncZ);
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// Gradient is computed with data spacing (world coordinates)
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ratio = in2Data->GetSpacing();
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// Loop through ouput pixels
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for (idxZ = 0; idxZ <= maxZ; idxZ++)
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{
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useZMin = ((idxZ + outExt[4]) <= wholeExtent[4]) ? 0 : -inIncs[2];
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useZMax = ((idxZ + outExt[4]) >= wholeExtent[5]) ? 0 : inIncs[2];
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for (idxY = 0; !self->AbortExecute && idxY <= maxY; idxY++)
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{
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useYMin = ((idxY + outExt[2]) <= wholeExtent[2]) ? 0 : -inIncs[1];
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useYMax = ((idxY + outExt[2]) >= wholeExtent[3]) ? 0 : inIncs[1];
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if (!id)
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{
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if (!(count%target))
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{
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self->UpdateProgress(count/(50.0*target));
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}
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count++;
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}
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for (idxX = 0; idxX <= maxX; idxX++)
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{
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useXMin = ((idxX + outExt[0]) <= wholeExtent[0]) ? 0 : -inIncs[0];
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useXMax = ((idxX + outExt[0]) >= wholeExtent[1]) ? 0 : inIncs[0];
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// calculate the neighbors
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d = vector[0] = (double)*in2Ptr * ratio[0];
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normalizeFactor = (d * d);
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d = vector[1] = (double)in2Ptr[1] * ratio[1];
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normalizeFactor += (d * d);
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if (axesNum == 3)
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{
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d = vector[2] = (double)in2Ptr[2] * ratio[2];
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normalizeFactor += (d * d);
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}
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if (normalizeFactor)
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{
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normalizeFactor = 1.0 / sqrt(normalizeFactor);
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}
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// Vector points positive along this idx?
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// (can point along multiple axes)
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d = vector[0] * normalizeFactor;
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if (d > 0.5)
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{
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neighborA = useXMax;
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neighborB = useXMin;
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}
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else if (d < -0.5)
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{
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neighborB = useXMax;
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neighborA = useXMin;
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}
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else
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{
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neighborA = 0;
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neighborB = 0;
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}
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d = vector[1] * normalizeFactor;
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if (d > 0.5)
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{
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neighborA += useYMax;
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neighborB += useYMin;
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}
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else if (d < -0.5)
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{
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neighborB += useYMax;
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neighborA += useYMin;
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}
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if (axesNum == 3)
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{
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d = vector[2] * normalizeFactor;
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if (d > 0.5)
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{
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neighborA += useZMax;
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neighborB += useZMin;
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}
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else if (d < -0.5)
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{
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neighborB += useZMax;
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neighborA += useZMin;
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}
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}
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// now process the components
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for (idxC = 0; idxC < maxC; idxC++)
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{
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// Pixel operation
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// Set Output Magnitude
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if (in1Ptr[neighborA] > *in1Ptr || in1Ptr[neighborB] > *in1Ptr)
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{
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*outPtr = 0;
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}
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else
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{
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*outPtr = *in1Ptr;
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// also check for them being equal is neighbor with larger ptr
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if ((neighborA > neighborB)&&(in1Ptr[neighborA] == *in1Ptr))
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{
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*outPtr = 0;
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}
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else if ((neighborB > neighborA)&&(in1Ptr[neighborB] == *in1Ptr))
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{
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*outPtr = 0;
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}
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}
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outPtr++;
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in1Ptr++;
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}
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in2Ptr += axesNum;
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}
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outPtr += outIncY;
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in1Ptr += inIncY;
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in2Ptr += in2IncY;
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}
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outPtr += outIncZ;
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in1Ptr += inIncZ;
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in2Ptr += in2IncZ;
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}
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}
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//----------------------------------------------------------------------------
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// This method is passed a input and output regions, and executes the filter
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// algorithm to fill the output from the inputs.
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// It just executes a switch statement to call the correct function for
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// the regions data types.
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void vtkImageNonMaximumSuppression::ThreadedRequestData(
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vtkInformation * vtkNotUsed( request ),
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vtkInformationVector ** vtkNotUsed( inputVector ),
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vtkInformationVector * vtkNotUsed( outputVector ),
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vtkImageData ***inData,
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vtkImageData **outData,
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int outExt[6], int id)
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{
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void *in1Ptr;
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void *in2Ptr;
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void *outPtr;
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if (id == 0)
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{
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if (outData[0] && outData[0]->GetPointData()->GetScalars())
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{
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outData[0]->GetPointData()->GetScalars()->SetName("SuppressedMaximum");
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}
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}
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in1Ptr = inData[0][0]->GetScalarPointerForExtent(outExt);
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in2Ptr = inData[1][0]->GetScalarPointerForExtent(outExt);
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outPtr = outData[0]->GetScalarPointerForExtent(outExt);
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// this filter expects that input is the same type as output.
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if (inData[0][0]->GetScalarType() != outData[0]->GetScalarType() ||
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inData[1][0]->GetScalarType() != outData[0]->GetScalarType())
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{
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vtkErrorMacro(<< "Execute: input ScalarType, " <<
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inData[0][0]->GetScalarType()
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<< ", must match out ScalarType " << outData[0]->GetScalarType());
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return;
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}
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switch (inData[0][0]->GetScalarType())
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{
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vtkTemplateMacro(
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vtkImageNonMaximumSuppressionExecute(this, inData[0][0],
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(VTK_TT *)(in1Ptr),inData[1][0],
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(VTK_TT *)(in2Ptr),
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outData[0], (VTK_TT *)(outPtr),
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outExt, id));
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default:
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vtkErrorMacro(<< "Execute: Unknown ScalarType");
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return;
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}
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}
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void vtkImageNonMaximumSuppression::PrintSelf(ostream& os, vtkIndent indent)
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{
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this->Superclass::PrintSelf(os,indent);
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os << indent << "Dimensionality: " << this->Dimensionality << "\n";
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os << indent << "HandleBoundaries: " << (this->HandleBoundaries ? "On\n" : "Off\n");
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}
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