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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 "itkFrameDifferenceVideoFilter.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 unsigned char OutputPixelType;
typedef itk::Image< OutputPixelType, Dimension > OutputFrameType;
typedef itk::VideoStream< OutputFrameType > OutputVideoType;
typedef itk::SizeValueType SizeValueType;
/**
* Helper function
*/
namespace itk
{
namespace FrameDifferenceVideoFilterTest
{
/**
* 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 FrameDifferenceVideoFilterTest
} // end namespace itk
/**
* Main test
*/
int itkFrameDifferenceVideoFilterTest( int itkNotUsed(argc), char* itkNotUsed(argv)[] )
{
// Instantiate the filter
typedef itk::FrameDifferenceVideoFilter< 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::FrameDifferenceVideoFilterTest::CreateInputFrame(i));
}
filter->SetInput(inputVideo);
//////
// Test filter with difference of adjacent frames (the default)
//////
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 = 1;
OutputPixelType actualVal = filter->GetOutput()->GetFrame(i)->GetPixel(checkPx);
if (expectedVal != actualVal)
{
std::cerr << "Filter failed to compute frame " << i << " correctly for adjacent 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 offset of 2
//////
// Reset the filter
filter = FilterType::New();
filter->SetInput(inputVideo);
filter->SetFrameOffset(2);
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 = 4; // Difference of 2 squared
OutputPixelType actualVal = filter->GetOutput()->GetFrame(i)->GetPixel(checkPx);
if (expectedVal != actualVal)
{
std::cerr << "Filter failed to compute frame " << i << " correctly with offset of 2." << std::endl;
std::cerr << "Expected Pixel Val: " << expectedVal << std::endl;
std::cerr << "Actual Pixel Val: " << actualVal << std::endl;
return EXIT_FAILURE;
}
}
//////
// Return successfully
//////
return EXIT_SUCCESS;
}
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