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/*=========================================================================
*
* Copyright Insight Software Consortium
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0.txt
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*=========================================================================*/
#include "itkOctree.h"
#include "itkNumericTraits.h"
#include "itkImageRegionIterator.h"
#include <stdlib.h>
#include <time.h>
#include <math.h>
template <typename TPixel,unsigned int TableSize>
class IdentityMap
{
public:
unsigned int Evaluate(const TPixel *pixel)
{
unsigned int pixval = static_cast<unsigned int>(*pixel);
return pixval < TableSize ? pixval : TableSize - 1;
}
};
int itkOctreeTest(int, char *[])
{
typedef itk::Image<unsigned int,3> ImageType;
const ImageType::SizeType imageSize = {{4,4,4}};
const ImageType::IndexType imageIndex = {{0,0,0}};
ImageType::RegionType region;
region.SetSize(imageSize);
region.SetIndex(imageIndex);
ImageType::Pointer img = ImageType::New();
img->SetLargestPossibleRegion(region);
img->SetBufferedRegion(region);
img->SetRequestedRegion(region);
img->Allocate();
srand( (unsigned)time( ITK_NULLPTR) );
itk::ImageRegionIterator<ImageType> ri(img,region);
try
{
unsigned int counter = 0;
while(!ri.IsAtEnd())
{
unsigned int val = rand() % 16384;
if(counter && counter % 8 == 0)
std::cerr << val << std::endl;
else
std::cerr << val << " ";
counter++;
ri.Set(val);
++ri;
}
}
catch(itk::ExceptionObject & ex)
{
ex.Print(std::cerr);
return EXIT_FAILURE;
}
typedef itk::Octree<unsigned int,16384,IdentityMap<unsigned int,16384> > OctreeType;
OctreeType::Pointer octree = OctreeType::New();
octree->BuildFromImage(img);
ImageType::Pointer output = octree->GetImage();
itk::ImageRegionIterator<ImageType> ri2(output,region);
ri.GoToBegin();
IdentityMap<unsigned int,16384> id;
try
{
while(!ri.IsAtEnd() && !ri2.IsAtEnd())
{
unsigned int x = ri.Get();
unsigned int y = ri2.Get();
unsigned int mapped = id.Evaluate(&x);
std::cerr << "x = " <<
x << " mapped(x) " << mapped << " y = " << y << std::endl;
if(mapped != y)
{
std::cerr << "Error comparing Input and Output of Octree" << std::endl;
return -1;
}
++ri;
++ri2;
}
if(!ri.IsAtEnd() || !ri2.IsAtEnd())
{
std::cerr << "Error, inconsistent image sizes in Octree" << std::endl;
return EXIT_FAILURE;
}
}
catch(itk::ExceptionObject & ex)
{
ex.Print(std::cerr);
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}
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