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/*
* Copyright (C) 2005-2017 Centre National d'Etudes Spatiales (CNES)
*
* This file is part of Orfeo Toolbox
*
* https://www.orfeo-toolbox.org/
*
* 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
*
* 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 "otbImage.h"
#include "otbChangeNoDataValueFilter.h"
#include "itkImageRegionIterator.h"
int otbChangeNoDataValueFilter(int itkNotUsed(argc),char * itkNotUsed(argv) [])
{
// Build an image
typedef otb::Image<double> ImageType;
ImageType::Pointer img = ImageType::New();
ImageType::SizeType size;
size.Fill(20);
ImageType::RegionType region;
region.SetSize(size);
// Fill it with a default value
img->SetRegions(region);
img->Allocate();
img->FillBuffer(10);
// Write no-data flags to it
std::vector<bool> flags(1,true);
std::vector<double> values(1,-10.);
otb::WriteNoDataFlags(flags,values,img->GetMetaDataDictionary());
// Fill half of the pixels with no-data values
itk::ImageRegionIterator<ImageType> it(img,region);
unsigned int count = 0;
for(it.GoToBegin();!it.IsAtEnd();++it,++count)
{
if (count%2 == 0)
it.Set(-10.);
}
// Instantiate filter
typedef otb::ChangeNoDataValueFilter<ImageType,ImageType> FilterType;
FilterType::Pointer filter = FilterType::New();
std::vector<double> newValues(1,-20.);
filter->SetInput(img);
filter->SetNewNoDataValues(newValues);
filter->Update();
// Check output
it = itk::ImageRegionIterator<ImageType>(filter->GetOutput(),region);
count = 0;
bool failed = false;
for(it.GoToBegin();!it.IsAtEnd();++it,++count)
{
if (count%2 == 0 && it.Get()!=-20.)
{
std::cerr<<"Pixel should have new no-data value"<<std::endl;
failed = true;
}
else if(count%2 == 1 && it.Get()!=10.)
{
std::cerr<<"Pixel value should be unchanged"<<std::endl;
failed = true;
}
}
otb::ReadNoDataFlags(filter->GetOutput()->GetMetaDataDictionary(),flags,values);
if(flags.empty() || !flags[0])
{
std::cerr<<"Output no-data flag should be [1] "<<std::endl;
failed = true;
}
if(values.empty() || values[0]!=-20)
{
std::cerr<<"Output no-data value should be [-20.]"<<std::endl;
failed = true;
}
if(failed)
return EXIT_FAILURE;
return EXIT_SUCCESS;
}
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