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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 "itkFrameAverageVideoFilter.h"
#include "itkVideoFileReader.h"
#include "itkVideoFileWriter.h"
#include "itkFileListVideoIOFactory.h"
// Set up typedefs for test
const unsigned int Dimension = 2;
typedef unsigned char InputPixelType;
typedef itk::Image< InputPixelType, Dimension > InputFrameType;
typedef itk::VideoStream< InputFrameType > InputVideoType;
typedef double OutputPixelType;
typedef itk::Image< OutputPixelType, Dimension > OutputFrameType;
typedef itk::VideoStream< OutputFrameType > OutputVideoType;
typedef itk::SizeValueType SizeValueType;
/**
* Helper function
*/
namespace itk
{
namespace FrameAverageVideoFilterTest
{
/**
* Create a new frame and fill it with the indicated value
*/
InputFrameType::Pointer CreateInputFrame(InputPixelType val)
{
InputFrameType::Pointer out = InputFrameType::New();
InputFrameType::RegionType largestRegion;
InputFrameType::SizeType sizeLR;
InputFrameType::IndexType startLR;
startLR.Fill(0);
sizeLR[0] = 50;
sizeLR[1] = 40;
largestRegion.SetSize(sizeLR);
largestRegion.SetIndex(startLR);
out->SetRegions(largestRegion);
out->Allocate();
// Fill with the desired value
itk::ImageRegionIterator<InputFrameType> iter(out, largestRegion);
while(!iter.IsAtEnd())
{
iter.Set(val);
++iter;
}
return out;
}
} // end namespace FrameAverageVideoFilterTest
} // end namespace itk
/**
* Main test
*/
int itkFrameAverageVideoFilterTest( int argc, char* argv[] )
{
//////
// Check Arguments
//////
if (argc < 3)
{
std::cout << "Usage: " << argv[0] << " input_file_string output_file_string" << std::endl;
return EXIT_FAILURE;
}
// Instantiate the filter
typedef itk::FrameAverageVideoFilter< InputVideoType, OutputVideoType > FilterType;
FilterType::Pointer filter = FilterType::New();
// Set up an input VideoStream
InputVideoType::Pointer inputVideo = InputVideoType::New();
SizeValueType numInputFrames = 50;
inputVideo->SetNumberOfBuffers(numInputFrames);
itk::TemporalRegion inputTempRegion;
inputTempRegion.SetFrameStart(0);
inputTempRegion.SetFrameDuration(numInputFrames);
inputVideo->SetLargestPossibleTemporalRegion(inputTempRegion);
inputVideo->SetRequestedTemporalRegion(inputTempRegion);
inputVideo->SetBufferedTemporalRegion(inputTempRegion);
for (SizeValueType i = 0; i < numInputFrames; ++i)
{
inputVideo->SetFrame(i, itk::FrameAverageVideoFilterTest::CreateInputFrame(i));
}
filter->SetInput(inputVideo);
//////
// Test filter with average over 2 frames
//////
filter->SetNumberOfFrames(2);
filter->UpdateOutputInformation();
// Make sure output largest possible temporal region is correct
itk::TemporalRegion outputLargestTempRegion =
filter->GetOutput()->GetLargestPossibleTemporalRegion();
SizeValueType outputStart = outputLargestTempRegion.GetFrameStart();
SizeValueType outputDuration = outputLargestTempRegion.GetFrameDuration();
if (outputStart != 0)
{
std::cerr << "output's LargestPossibleTemporalRegion incorrect start. Got: "
<< outputStart << " Expected: 0" << std::endl;
return EXIT_FAILURE;
}
if (outputDuration != numInputFrames - 1)
{
std::cerr << "output's LargestPossibleTemporalRegion incorrect duration. Got: "
<< outputDuration << " Expected: " << numInputFrames - 1 << std::endl;
return EXIT_FAILURE;
}
// Go one frame at a time and check results
OutputFrameType::IndexType checkPx;
checkPx[0] = inputVideo->GetFrame(0)->GetLargestPossibleRegion().GetSize()[0] - 1;
checkPx[1] = inputVideo->GetFrame(0)->GetLargestPossibleRegion().GetSize()[1] - 1;
for (unsigned int i = outputStart; i < outputStart + outputDuration; ++i)
{
itk::TemporalRegion reqTempRegion;
reqTempRegion.SetFrameStart(i);
reqTempRegion.SetFrameDuration(1);
filter->GetOutput()->SetRequestedTemporalRegion(reqTempRegion);
filter->Update();
// Check the results
OutputPixelType expectedVal = (OutputPixelType)(i + (i+1))/2.0;
OutputPixelType actualVal = filter->GetOutput()->GetFrame(i)->GetPixel(checkPx);
double eps = 0.00001;
if (expectedVal < actualVal - eps || expectedVal > actualVal + eps)
{
std::cerr << "Filter failed to compute frame " << i << " correctly over 2 frames." << std::endl;
std::cerr << "Expected Pixel Val: " << expectedVal << std::endl;
std::cerr << "Actual Pixel Val: " << actualVal << std::endl;
return EXIT_FAILURE;
}
}
//////
// Test filter with average over 3 frames
//////
// Reset the filter
filter = FilterType::New();
filter->SetInput(inputVideo);
filter->SetNumberOfFrames(3);
filter->UpdateOutputInformation();
// Make sure output largest possible temporal region is correct
outputLargestTempRegion = filter->GetOutput()->GetLargestPossibleTemporalRegion();
outputStart = outputLargestTempRegion.GetFrameStart();
outputDuration = outputLargestTempRegion.GetFrameDuration();
if (outputStart != 0)
{
std::cerr << "output's LargestPossibleTemporalRegion incorrect start. Got: "
<< outputStart << " Expected: 0" << std::endl;
return EXIT_FAILURE;
}
if (outputDuration != numInputFrames - 2)
{
std::cerr << "output's LargestPossibleTemporalRegion incorrect duration. Got: "
<< outputDuration << " Expected: " << numInputFrames - 2 << std::endl;
return EXIT_FAILURE;
}
// Get all the frames at once and check results
filter->Update();
for (unsigned int i = outputStart; i < outputStart + outputDuration; ++i)
{
OutputPixelType expectedVal = (OutputPixelType)(i + (i+1) + (i+2))/3.0;
OutputPixelType actualVal = filter->GetOutput()->GetFrame(i)->GetPixel(checkPx);
double eps = 0.00001;
if (expectedVal < actualVal - eps || expectedVal > actualVal + eps)
{
std::cerr << "Filter failed to compute frame " << i << " correctly over 3 frames." << std::endl;
std::cerr << "Expected Pixel Val: " << expectedVal << std::endl;
std::cerr << "Actual Pixel Val: " << actualVal << std::endl;
return EXIT_FAILURE;
}
}
//////
// Now test with reading from a file
//////
// Register FileListIO with the factory -- shouldn't have to do this. Needs fixing
itk::ObjectFactoryBase::RegisterFactory( itk::FileListVideoIOFactory::New() );
// Set up reader and writer
typedef itk::VideoFileReader<InputVideoType> VideoReaderType;
typedef itk::VideoFileWriter<InputVideoType> VideoWriterType;
VideoReaderType::Pointer reader = VideoReaderType::New();
VideoWriterType::Pointer writer = VideoWriterType::New();
reader->SetFileName(argv[1]);
writer->SetFileName(argv[2]);
// Set up pipeline with 2 average filters each over 2 frames
typedef itk::FrameAverageVideoFilter<InputVideoType, InputVideoType> FilterType2;
FilterType2::Pointer avg1 = FilterType2::New();
FilterType2::Pointer avg2 = FilterType2::New();
avg1->SetNumberOfFrames(2);
avg2->SetNumberOfFrames(2);
avg1->SetInput(reader->GetOutput());
avg2->SetInput(avg1->GetOutput());
writer->SetInput(avg2->GetOutput());
// Update the writer. This should process the entire video
writer->Update();
//////
// Return successfully
//////
return EXIT_SUCCESS;
}
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