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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.
*
*=========================================================================*/
/*
This file test the various inclusion strategies available
to itkFloodFilledSpatialFunctionConditionalIterator.
*/
#include "itkImageRegionIterator.h"
#include "itkSphereSpatialFunction.h"
#include "itkFloodFilledSpatialFunctionConditionalIterator.h"
int
itkFloodFilledSpatialFunctionTest(int, char *[])
{
constexpr unsigned int dim = 2;
// Image type alias
using ImageType = itk::Image<bool, dim>;
using SizeValueType = ImageType::SizeValueType;
using SpacingValueType = ImageType::SpacingValueType;
using PointValueType = ImageType::PointValueType;
// Image size and spacing parameters
SizeValueType sourceImageSize[] = { 5, 5 };
SpacingValueType sourceImageSpacing[] = { 1.0, 1.0 };
PointValueType sourceImageOrigin[] = { 0, 0 };
// Creates the sourceImage (but doesn't set the size or allocate memory)
auto sourceImage = ImageType::New();
sourceImage->SetOrigin(sourceImageOrigin);
sourceImage->SetSpacing(sourceImageSpacing);
// Create a size object native to the sourceImage type
ImageType::SizeType sourceImageSizeObject;
// Set the size object to the array defined earlier
sourceImageSizeObject.SetSize(sourceImageSize);
// Create a region object native to the sourceImage type
ImageType::RegionType largestPossibleRegion;
// Resize the region
largestPossibleRegion.SetSize(sourceImageSizeObject);
// Set the largest legal region size (i.e. the size of the whole sourceImage), the buffered, and
// the requested region to what we just defined.
sourceImage->SetRegions(largestPossibleRegion);
// Now allocate memory for the sourceImage
sourceImage->Allocate();
// Loop over all available iterator strategies
for (int strat = 0; strat < 4; ++strat)
{
// Initialize the image to hold all 0's
itk::ImageRegionIterator<ImageType> it(sourceImage, largestPossibleRegion);
for (it.GoToBegin(); !it.IsAtEnd(); ++it)
{
it.Set(false);
}
// Create and initialize a spatial function
using FunctionType = itk::SphereSpatialFunction<dim>;
using FunctionPositionType = FunctionType::InputType;
auto spatialFunc = FunctionType::New();
spatialFunc->SetRadius(1.0);
FunctionPositionType center;
center[0] = 2.5;
center[1] = 2.5;
spatialFunc->SetCenter(center);
// Create and initialize a spatial function iterator
ImageType::IndexType seedPos;
const ImageType::IndexValueType pos[] = { 2, 2 };
seedPos.SetIndex(pos);
using ItType = itk::FloodFilledSpatialFunctionConditionalIterator<ImageType, FunctionType>;
ItType sfi(sourceImage, spatialFunc, seedPos);
switch (strat)
{
case 0:
{
sfi.SetOriginInclusionStrategy();
}
break;
case 1:
{
sfi.SetCenterInclusionStrategy();
}
break;
case 2:
{
sfi.SetCompleteInclusionStrategy();
}
break;
case 3:
{
sfi.SetIntersectInclusionStrategy();
}
} // end switch inclusion strategy
// Iterate through the entire image and set interior pixels to 1
for (sfi.GoToBegin(); !(sfi.IsAtEnd()); ++sfi)
{
sfi.Set(true);
}
} // end loop over iterator strategies
return EXIT_SUCCESS;
}
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