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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.
*
*=========================================================================*/
#include "itkSobelOperator.h"
#include "itkTestingMacros.h"
int
itkSobelOperatorTest(int, char *[])
{
constexpr unsigned int Dimension2D = 2;
constexpr unsigned int Dimension3D = 3;
constexpr unsigned int Dimension4D = 4;
using PixelType = float;
{
constexpr unsigned int Length = 9;
using SobelOperatorType = itk::SobelOperator<PixelType, Dimension2D>;
SobelOperatorType sobelOperator;
ITK_EXERCISE_BASIC_OBJECT_METHODS((&sobelOperator), SobelOperator, NeighborhoodOperator);
// Horizontal
unsigned long direction = 0;
sobelOperator.SetDirection(direction);
ITK_TEST_SET_GET_VALUE(direction, sobelOperator.GetDirection());
itk::Size<Dimension2D> radius;
radius.Fill(1);
sobelOperator.CreateToRadius(radius);
itk::FixedArray<SobelOperatorType::PixelType, Length> expectedValuesHoriz{
{ { -1.0, 0.0, 1.0, -2.0, 0.0, 2.0, -1.0, 0.0, 1.0 } }
};
const unsigned int size = sobelOperator.GetBufferReference().size();
for (itk::SizeValueType i = 0; i < size; ++i)
{
ITK_TEST_EXPECT_EQUAL(expectedValuesHoriz[i], sobelOperator[i]);
ITK_TEST_EXPECT_EQUAL(expectedValuesHoriz[i], sobelOperator.GetElement(i));
}
// Vertical
direction = 1;
sobelOperator.SetDirection(direction);
ITK_TEST_SET_GET_VALUE(direction, sobelOperator.GetDirection());
sobelOperator.CreateDirectional();
itk::FixedArray<SobelOperatorType::PixelType, Length> expectedValuesVert{
{ { -1.0, -2.0, -1.0, 0.0, 0.0, 0.0, 1.0, 2.0, 1.0 } }
};
for (itk::SizeValueType i = 0; i < size; ++i)
{
ITK_TEST_EXPECT_EQUAL(expectedValuesVert[i], sobelOperator[i]);
ITK_TEST_EXPECT_EQUAL(expectedValuesVert[i], sobelOperator.GetElement(i));
}
}
{
constexpr unsigned int Length = 27;
using SobelOperatorType = itk::SobelOperator<PixelType, Dimension3D>;
SobelOperatorType sobelOperator;
unsigned long direction = 0;
sobelOperator.SetDirection(direction);
ITK_TEST_SET_GET_VALUE(direction, sobelOperator.GetDirection());
itk::Size<Dimension3D> radius;
radius.Fill(1);
sobelOperator.CreateToRadius(radius);
itk::FixedArray<SobelOperatorType::PixelType, Length> expectedValuesX{
{ { -1.0, 0.0, 1.0, -3.0, 0.0, 3.0, -1.0, 0.0, 1.0, -3.0, 0.0, 3.0, -6.0, 0.0,
6.0, -3.0, 0.0, 3.0, -1.0, 0.0, 1.0, -3.0, 0.0, 3.0, -1.0, 0.0, 1.0 } }
};
const unsigned int size = sobelOperator.GetBufferReference().size();
for (itk::SizeValueType i = 0; i < size; ++i)
{
ITK_TEST_EXPECT_EQUAL(expectedValuesX[i], sobelOperator[i]);
ITK_TEST_EXPECT_EQUAL(expectedValuesX[i], sobelOperator.GetElement(i));
}
direction = 1;
sobelOperator.SetDirection(direction);
sobelOperator.CreateDirectional();
ITK_TEST_SET_GET_VALUE(direction, sobelOperator.GetDirection());
itk::FixedArray<SobelOperatorType::PixelType, Length> expectedValuesY{
{ { -1.0, -3.0, -1.0, 0.0, 0.0, 0.0, 1.0, 3.0, 1.0, -3.0, -6.0, -3.0, 0.0, 0.0,
0.0, 3.0, 6.0, 3.0, -1.0, -3.0, -1.0, 0.0, 0.0, 0.0, 1.0, 3.0, 1.0 } }
};
for (itk::SizeValueType i = 0; i < size; ++i)
{
ITK_TEST_EXPECT_EQUAL(expectedValuesY[i], sobelOperator[i]);
ITK_TEST_EXPECT_EQUAL(expectedValuesY[i], sobelOperator.GetElement(i));
}
direction = 2;
sobelOperator.SetDirection(direction);
ITK_TEST_SET_GET_VALUE(direction, sobelOperator.GetDirection());
sobelOperator.CreateDirectional();
itk::FixedArray<SobelOperatorType::PixelType, Length> expectedValuesZ{
{ { -1.0, -3.0, -1.0, -3.0, -6.0, -3.0, -1.0, -3.0, -1.0, 0.0, 0.0, 0.0, 0.0, 0.0,
0.0, 0.0, 0.0, 0.0, 1.0, 3.0, 1.0, 3.0, 6.0, 3.0, 1.0, 3.0, 1.0 } }
};
for (itk::SizeValueType i = 0; i < size; ++i)
{
ITK_TEST_EXPECT_EQUAL(expectedValuesZ[i], sobelOperator[i]);
ITK_TEST_EXPECT_EQUAL(expectedValuesZ[i], sobelOperator.GetElement(i));
}
}
{
using SobelOperatorType = itk::SobelOperator<PixelType, Dimension4D>;
SobelOperatorType sobelOperator;
unsigned long direction = 0;
sobelOperator.SetDirection(direction);
itk::Size<Dimension4D> radius;
radius.Fill(1);
ITK_TRY_EXPECT_EXCEPTION(sobelOperator.CreateToRadius(radius));
}
std::cout << "Test finished." << std::endl;
return EXIT_SUCCESS;
}
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