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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 "itkNiftiImageIOTest.h"
typedef itk::Image<unsigned char,3> Test4ImageType;
void
PrintDir(Test4ImageType::DirectionType &dir)
{
for(unsigned i = 0; i < 3; i++)
{
for(unsigned j = 0; j < 3; j++)
{
std::cerr << dir[i][j] << " ";
}
std::cerr << std::endl;
}
}
int itkNiftiImageIOTest4(int ac, char* av[])
{
//
// first argument is passing in the writable directory to do all testing
if(ac > 1)
{
char *testdir = *++av;
itksys::SystemTools::ChangeDirectory(testdir);
}
else
{
return EXIT_FAILURE;
}
//
Test4ImageType::RegionType imageRegion;
Test4ImageType::SizeType size;
Test4ImageType::IndexType index;
Test4ImageType::SpacingType spacing;
const unsigned dimsize = 2;
for(unsigned i = 0; i < 3; i++)
{
size[i] = dimsize;
index[i] = 0;
spacing[i] = 1.0;
}
imageRegion.SetSize(size);
imageRegion.SetIndex(index);
Test4ImageType::Pointer test4Image =
itk::IOTestHelper::AllocateImageFromRegionAndSpacing<Test4ImageType>(imageRegion, spacing);
test4Image->FillBuffer(0);
Test4ImageType::DirectionType dir;
dir.SetIdentity();
#if 1
// arbitrarily rotate the unit vectors to pick random direction
// cosines;
vnl_random randgen(8775070);
typedef itk::AffineTransform<double,3> TransformType;
typedef itk::Vector<double,3> AxisType;
TransformType::Pointer transform = TransformType::New();
AxisType axis;
axis[0] = 1.0; axis[1] = 0.0; axis[2] = 0.0;
transform->Rotate3D(axis,randgen.drand32(0,3.1415926*2.0));
axis[0] = 0.0; axis[1] = 1.0; axis[2] = 0.0;
transform->Rotate3D(axis,randgen.drand32(0,3.1415926*2.0));
axis[0] = 0.0; axis[1] = 0.0; axis[2] = 1.0;
transform->Rotate3D(axis,randgen.drand32(0,3.1415926*2.0));
TransformType::MatrixType mat = transform->GetMatrix();
for(unsigned i = 0; i < 3; i++)
{
for(unsigned j = 0; j < 3; j++)
{
dir[i][j] = mat[i][j];
}
}
#else
dir =
itk::SpatialOrientationAdapter().ToDirectionCosines(itk::SpatialOrientation::ITK_COORDINATE_ORIENTATION_PLI);
#endif
test4Image->SetDirection(dir);
std::string fname("directionsTest.nii.gz");
try
{
itk::IOTestHelper::WriteImage<Test4ImageType,itk::NiftiImageIO>(test4Image,fname);
}
catch(itk::ExceptionObject &ex)
{
std::string message;
message = "Problem found while writing image ";
message += fname; message += "\n";
message += ex.GetLocation(); message += "\n";
message += ex.GetDescription(); std::cout << message << std::endl;
itk::IOTestHelper::Remove(fname.c_str());
return EXIT_FAILURE;
}
//
// read it back in.
Test4ImageType::Pointer readback;
try
{
readback = itk::IOTestHelper::ReadImage<Test4ImageType>(fname);
}
catch(itk::ExceptionObject &ex)
{
std::string message;
message = "Problem found while reading image ";
message += fname; message += "\n";
message += ex.GetLocation(); message += "\n";
message += ex.GetDescription(); std::cout << message << std::endl;
itk::IOTestHelper::Remove(fname.c_str());
return EXIT_FAILURE;
}
itk::IOTestHelper::Remove(fname.c_str());
Test4ImageType::DirectionType dir2 = readback->GetDirection();
std::cerr << "Original direction" << std::endl;
PrintDir(dir);
std::cerr << "Retrieved direction" << std::endl;
PrintDir(dir2);
for(unsigned int i = 0; i < 3; i++)
{
for(unsigned int j = 0; j < 3; j++)
{
if(!Equal(dir[i][j],dir2[i][j]))
{
std::cerr << "difference = " << dir[i][j] - dir2[i][j] << std::endl;
return EXIT_FAILURE;
}
}
}
return EXIT_SUCCESS;
}
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