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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 <iostream>
#include "itkOpenCVImageBridge.h"
#include "itkImageFileReader.h"
#include "itkImageRegionConstIteratorWithIndex.h"
#include "itkOpenCVVideoIOFactory.h"
#if defined( CV_VERSION_EPOCH )
// OpenCV 2.4.x
#include "highgui.h"
#else
// OpenCV 3.x
#include "opencv2/imgcodecs.hpp" // cv::imread
#include "opencv2/imgcodecs/imgcodecs_c.h" // CV_LOAD_IMAGE_COLOR
#include "opencv2/imgproc/types_c.h" // CV_RGB2BGR
#endif
//-----------------------------------------------------------------------------
// Compare RGBPixel Images
//
template<typename TPixelValue, unsigned int VDimension>
TPixelValue
RGBImageTotalAbsDifference(
const itk::Image<itk::RGBPixel<TPixelValue>, VDimension>* valid,
const itk::Image<itk::RGBPixel<TPixelValue>, VDimension>* test)
{
typedef itk::RGBPixel<TPixelValue> PixelType;
typedef itk::Image<PixelType, VDimension> RGBImageType;
typedef itk::ImageRegionConstIteratorWithIndex<RGBImageType> IterType;
IterType validIt(valid, valid->GetLargestPossibleRegion());
validIt.GoToBegin();
IterType testIt(test, test->GetLargestPossibleRegion());
testIt.GoToBegin();
TPixelValue totalDiff = 0;
while(!validIt.IsAtEnd())
{
PixelType validPx = validIt.Get();
PixelType testPx = testIt.Get();
if( validIt.GetIndex() != testIt.GetIndex() )
{
std::cerr << "validIt.GetIndex() != testIt.GetIndex()" << std::endl;
return 1;
}
TPixelValue localDiff = itk::NumericTraits< TPixelValue >::ZeroValue();
for( unsigned int i = 0; i < 3; i++ )
{
localDiff += itk::Math::abs(validPx[i] - testPx[i]);
}
if( localDiff != itk::NumericTraits< TPixelValue >::ZeroValue() )
{
IterType testIt2 = testIt;
++testIt2;
IterType validIt2 = validIt;
++validIt2;
std::cerr << testIt.GetIndex() << " [ " << validPx << " " << validIt2.Get() << "] != [ " << testPx << " " << testIt2.Get() << " ]" << std::endl;
return localDiff;
}
totalDiff += localDiff;
++validIt;
++testIt;
}
return totalDiff;
}
//-----------------------------------------------------------------------------
// Convert the data in the IplImage to the templated type
//
template<typename TPixelType>
IplImage* ConvertIplImageDataType(IplImage* in)
{
int depth = 0;
// Figure out the right output type
if (typeid(TPixelType) == typeid(unsigned char))
{
depth = IPL_DEPTH_8U;
}
else if (typeid(TPixelType) == typeid(char))
{
depth = IPL_DEPTH_8S;
}
else if (typeid(TPixelType) == typeid(unsigned short))
{
depth = IPL_DEPTH_16U;
}
else if (typeid(TPixelType) == typeid(short))
{
depth = IPL_DEPTH_16S;
}
else if (typeid(TPixelType) == typeid(float))
{
depth = IPL_DEPTH_32F;
}
else if (typeid(TPixelType) == typeid(double))
{
depth = IPL_DEPTH_64F;
}
else
{
itkGenericExceptionMacro("OpenCV doesn't support the requested type");
}
IplImage* out = cvCreateImage(cvSize(in->width, in->height), depth, in->nChannels);
cvConvertScale(in, out);
return out;
}
//-----------------------------------------------------------------------------
// Templated test function to do the heavy lifting for RGB case
//
template<typename TValue, unsigned int VDimension>
int itkOpenCVImageBridgeTestTemplatedRGB(char* argv0, char* argv1)
{
// typedefs
const unsigned int Dimension = VDimension;
typedef TValue ValueType;
typedef itk::RGBPixel< ValueType > PixelType;
typedef typename PixelType::ComponentType ComponentType;
typedef itk::Image< PixelType, Dimension > ImageType;
typedef itk::ImageFileReader<ImageType> ReaderType;
//
// Read the image directly
//
typename ReaderType::Pointer reader = ReaderType::New();
reader->SetFileName(argv1);
try
{
reader->Update();
}
catch( itk::ExceptionObject& e )
{
std::cerr << e.what() << std::endl;
return EXIT_FAILURE;
}
typename ImageType::Pointer baselineImage = reader->GetOutput();
//
// Test IplImage -> itk::Image
//
IplImage* inIpl = cvLoadImage(argv0, CV_LOAD_IMAGE_COLOR);
if (!inIpl)
{
std::cerr << "Could not load input as IplImage " << argv0 << std::endl;
return EXIT_FAILURE;
}
typename ImageType::Pointer outIplITK =
itk::OpenCVImageBridge::IplImageToITKImage< ImageType >(inIpl);
ComponentType itkIplDiff1 = RGBImageTotalAbsDifference<ComponentType, Dimension>(
baselineImage, outIplITK);
// Check results of IplImage -> itk::Image
if ( itkIplDiff1 != itk::NumericTraits< ComponentType >::ZeroValue() )
{
std::cerr << "Images didn't match for pixel type " << typeid(PixelType).name()
<< " for IplImage -> ITK (RGB), with image difference = " << itkIplDiff1<< std::endl;
cvReleaseImage(&inIpl);
return EXIT_FAILURE;
}
//
// Test cv::Mat -> itk::Image
//
cv::Mat inMat = cv::imread(argv0);
typename ImageType::Pointer outMatITK =
itk::OpenCVImageBridge::CVMatToITKImage< ImageType >(inMat);
ComponentType itkCvMatDiff = RGBImageTotalAbsDifference<ComponentType, Dimension>(
baselineImage, outMatITK);
// Check results of cv::Mat -> itk::Image
if ( itkCvMatDiff != itk::NumericTraits< ComponentType >::ZeroValue() )
{
std::cerr << "Images didn't match for pixel type " << typeid(PixelType).name()
<< " for cv::Mat -> ITK (RGB)" << std::endl;
cvReleaseImage(&inIpl);
return EXIT_FAILURE;
}
//
// Test itk::Image -> IplImage
//
IplImage* outIpl = itk::OpenCVImageBridge::ITKImageToIplImage< ImageType >(baselineImage);
// check results of itk::Image -> IplImage
IplImage* dataConvertedInIpl = ConvertIplImageDataType<ValueType>(inIpl);
double itkIplDiff = cvNorm(outIpl, dataConvertedInIpl);
if (itkIplDiff != 0.0)
{
std::cerr << "Images didn't match for pixel type " << typeid(ValueType).name()
<< " for ITK -> IplImage (RGB), with image difference = " << itkIplDiff << std::endl;
cvReleaseImage(&dataConvertedInIpl);
cvReleaseImage(&inIpl);
cvReleaseImage(&outIpl);
return EXIT_FAILURE;
}
//
// Test itk::Image -> cv::Mat
//
cv::Mat outMat = itk::OpenCVImageBridge::ITKImageToCVMat< ImageType >(baselineImage);
// check results of itk::Image -> IplImage
IplImage outMatAsIpl = outMat;
double itkMatDiff = cvNorm(&outMatAsIpl, dataConvertedInIpl);
if (itkMatDiff != 0.0)
{
std::cerr << "Images didn't match for pixel type " << typeid(PixelType).name()
<< " for ITK -> cv::Mat (RGB)" << std::endl;
cvReleaseImage(&dataConvertedInIpl);
cvReleaseImage(&inIpl);
cvReleaseImage(&outIpl);
return EXIT_FAILURE;
}
//
// Clean up and return successfully
//
cvReleaseImage(&dataConvertedInIpl);
cvReleaseImage(&inIpl);
cvReleaseImage(&outIpl);
return EXIT_SUCCESS;
}
template< typename TValue >
int itkRunRGBTest( char* argv0, char* argv1 )
{
if (itkOpenCVImageBridgeTestTemplatedRGB< TValue, 2 >(argv0, argv1) == EXIT_FAILURE)
{
return EXIT_FAILURE;
}
if (itkOpenCVImageBridgeTestTemplatedRGB< TValue, 3 >(argv0, argv1) == EXIT_FAILURE)
{
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}
//-----------------------------------------------------------------------------
// Main test
//
int itkOpenCVImageBridgeRGBTest ( int argc, char *argv[] )
{
//
// Check arguments
//
if (argc != 4 )
{
std::cerr << "Usage: " << argv[0] << "rgb_jpg_image rgb_mha_image rgb_image2" << std::endl;
return EXIT_FAILURE;
}
//
// Test for RGB types
//
// Note: OpenCV only supports unsigned char, unsigned short, and float for
// color conversion
//
std::cout << "rgb" << std::endl;
if( itkRunRGBTest< unsigned char >( argv[1], argv[2] ) == EXIT_FAILURE )
{
return EXIT_FAILURE;
}
if( itkRunRGBTest< unsigned short >( argv[1], argv[2] ) == EXIT_FAILURE )
{
return EXIT_FAILURE;
}
if( itkRunRGBTest< float >( argv[1], argv[2] ) == EXIT_FAILURE )
{
return EXIT_FAILURE;
}
std::cout << "rgb 513x512" << std::endl;
if( itkRunRGBTest< unsigned char >( argv[3], argv[3] ) == EXIT_FAILURE )
{
return EXIT_FAILURE;
}
if( itkRunRGBTest< unsigned short >( argv[3], argv[3] ) == EXIT_FAILURE )
{
return EXIT_FAILURE;
}
if( itkRunRGBTest< float >( argv[3], argv[3] ) == EXIT_FAILURE )
{
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}
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