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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: itkIteratorTests.cxx
Language: C++
Date: $Date$
Version: $Revision$
Copyright (c) Insight Software Consortium. All rights reserved.
See ITKCopyright.txt or http://www.itk.org/HTML/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 notices for more information.
=========================================================================*/
#if defined(_MSC_VER)
#pragma warning ( disable : 4786 )
#endif
#include <iostream>
#include "itkImage.h"
#include "itkVector.h"
#include "itkImageRegionIterator.h"
#include "itkImageRegionIteratorWithIndex.h"
#include <time.h>
int itkIteratorTests(int, char* [] )
{
std::cout << "Creating an image" << std::endl;
typedef itk::Image<unsigned short, 3> ScalarImage;
ScalarImage::Pointer o3 = ScalarImage::New();
double origin3D[3] = { 5, 2.1, 8.1};
double spacing3D[3] = { 1.5, 2.1, 1};
ScalarImage::SizeType imageSize3D = {{ 200, 200, 200 }};
ScalarImage::SizeType bufferSize3D = {{ 200, 200, 200 }};
ScalarImage::SizeType regionSize3D = {{ 190, 190, 190 }};
ScalarImage::IndexType startIndex3D = {{0, 0, 0}};
ScalarImage::IndexType bufferStartIndex3D = {{0, 0, 0}};
ScalarImage::IndexType regionStartIndex3D = {{5,5, 5}};
ScalarImage::RegionType region;
region.SetSize(imageSize3D);
region.SetIndex(startIndex3D);
o3->SetLargestPossibleRegion( region );
region.SetSize(bufferSize3D);
region.SetIndex(bufferStartIndex3D);
o3->SetBufferedRegion( region );
region.SetSize(regionSize3D);
region.SetIndex(regionStartIndex3D);
o3->SetRequestedRegion( region );
o3->SetOrigin(origin3D);
o3->SetSpacing(spacing3D);
o3->Allocate();
// extra variables
double elapsedTime;
clock_t start, end;
unsigned long num = 190*190*190;
unsigned long i;
bool passed = true;
// memset
start = clock();
unsigned short *ptr = o3->GetBufferPointer();
memset(ptr, 0, num*sizeof(unsigned short));
end = clock();
elapsedTime = (end - start) / (double) CLOCKS_PER_SEC;
std::cout << "Raw pointer using memset" << std::endl;
std::cout << "\tTime = " << elapsedTime << std::endl;
std::cout << "\tPixels = " << num << std::endl;
// 1D array
start = clock();
ptr = o3->GetBufferPointer();
for (i=0; i < num; ++i)
{
++ptr;
}
end = clock();
*ptr = 0;
elapsedTime = (end - start) / (double) CLOCKS_PER_SEC;
std::cout << "Raw pointer as a 1D array" << std::endl;
std::cout << "\tTime = " << elapsedTime << std::endl;
std::cout << "\tPixels = " << i << std::endl;
if (i != num)
{
passed = false;
}
// 3 nested loops
unsigned long ii, jj, kk, len=190;
start = clock();
i = 0;
ptr = o3->GetBufferPointer();
for (ii=0; ii < len; ++ii)
for (jj=0; jj < len; ++jj)
for (kk=0; kk < len; ++kk)
{
*ptr = 5;
++ptr;
++i;
}
end = clock();
elapsedTime = (end - start) / (double) CLOCKS_PER_SEC;
std::cout << "Raw pointer in 3 nested loops" << std::endl;
std::cout << "\tTime = " << elapsedTime << std::endl;
std::cout << "\tPixels = " << i << std::endl;
if (i != num)
{
passed = false;
}
// ImageRegionIterator
start = clock();
itk::ImageRegionIterator<ScalarImage> it(o3, region);
unsigned short scalar;
scalar = 5;
i = 0;
for ( ; !it.IsAtEnd(); ++it)
{
it.Set( scalar );
++i;
}
end = clock();
elapsedTime = (end - start) / (double) CLOCKS_PER_SEC;
std::cout << "ImageRegionIterator" << std::endl;
std::cout << "\tTime = " << elapsedTime << std::endl;
std::cout << "\tPixels = " << i << std::endl;
if (i != num)
{
passed = false;
}
// ImageRegionIteratorWithIndex
start = clock();
itk::ImageRegionIteratorWithIndex<ScalarImage> it2(o3, region);
i = 0;
for ( ; !it2.IsAtEnd(); ++it2)
{
it2.Set( scalar );
++i;
}
end = clock();
elapsedTime = (end - start) / (double) CLOCKS_PER_SEC;
std::cout << "ImageRegionIteratorWithIndex" << std::endl;
std::cout << "\tTime = " << elapsedTime << std::endl;
std::cout << "\tPixels = " << i << std::endl;
if (i != num)
{
passed = false;
}
if (passed)
{
std::cout << "Iterator tests passed" << std::endl;
return EXIT_SUCCESS;
}
else
{
std::cout << "Iterator tests failed" << std::endl;
return EXIT_FAILURE;
}
}
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