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/*=========================================================================
*
* Copyright NumFOCUS
*
* 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
*
* https://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.
*
*=========================================================================*/
// Test itk::ShapedFloodFilledImageFunctionConditionalConstIterator on a 2D
// image using 4 connectivity.
#include "itkBinaryThresholdImageFunction.h"
#include "itkImageLinearIteratorWithIndex.h"
#include "itkFloodFilledImageFunctionConditionalConstIterator.h"
#include "itkShapedFloodFilledImageFunctionConditionalConstIterator.h"
int
itkShapedFloodFilledImageFunctionConditionalConstIteratorTest2(int, char *[])
{
try
{
constexpr unsigned int ImageDimension = 2;
using PixelType = unsigned char;
using ImageType = itk::Image<PixelType, ImageDimension>;
using RegionType = ImageType::RegionType;
using IndexType = ImageType::IndexType;
using FunctionType = itk::BinaryThresholdImageFunction<ImageType>;
using FloodFilledIteratorType = itk::FloodFilledImageFunctionConditionalConstIterator<ImageType, FunctionType>;
using ShapedFloodFilledIteratorType =
itk::ShapedFloodFilledImageFunctionConditionalConstIterator<ImageType, FunctionType>;
std::vector<IndexType> seedList;
RegionType region;
region.SetSize(0, 128);
region.SetSize(1, 128);
region.SetIndex(0, 0);
region.SetIndex(1, 0);
auto inputImage = ImageType::New();
inputImage->SetRegions(region);
inputImage->AllocateInitialized();
itk::ImageLinearIteratorWithIndex<ImageType> it(inputImage, region);
// make sure that we create a 4-connected image!
for (unsigned int dir = 0; dir < ImageDimension; ++dir)
{
it.SetDirection(dir);
it.GoToBegin();
while (!it.IsAtEnd())
{
while (!it.IsAtEndOfLine())
{
// add a seed
if (seedList.empty())
{
seedList.push_back(it.GetIndex());
}
it.Set(255);
++it;
}
// and jump over every
it.NextLine();
if (!it.IsAtEnd())
{
it.NextLine();
}
if (!it.IsAtEnd())
{
it.NextLine();
}
}
}
auto function = FunctionType::New();
function->SetInputImage(inputImage);
function->ThresholdAbove(1); // >= 1
FloodFilledIteratorType floodIt(inputImage, function, seedList);
ShapedFloodFilledIteratorType shapedFloodIt(inputImage, function, seedList);
shapedFloodIt.SetFullyConnected(false); // 4-connected, default
for (unsigned short i = 1; !floodIt.IsAtEnd(); ++floodIt, ++shapedFloodIt, ++i)
{
if (floodIt.GetIndex() != shapedFloodIt.GetIndex())
{
return EXIT_FAILURE;
}
}
if (!floodIt.IsAtEnd() || !shapedFloodIt.IsAtEnd())
{
return EXIT_FAILURE;
}
}
catch (const itk::ExceptionObject & e)
{
e.Print(std::cerr);
return EXIT_FAILURE;
}
catch (...)
{
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}
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