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- //
- // Copyright 2019 Olzhas Zhumabek <anonymous.from.applecity@gmail.com>
- //
- // Use, modification and distribution are subject to the Boost Software License,
- // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
- // http://www.boost.org/LICENSE_1_0.txt)
- //
- #include <boost/gil/image_processing/numeric.hpp>
- #include <boost/gil/image.hpp>
- #include <boost/gil/image_view.hpp>
- #include <boost/gil/typedefs.hpp>
- #include <boost/core/lightweight_test.hpp>
- namespace gil = boost::gil;
- void test_normalized_mean_generation()
- {
- auto kernel = gil::generate_normalized_mean(5);
- for (const auto& cell: kernel)
- {
- const auto expected_value = static_cast<float>(1 / 25.f);
- BOOST_TEST(cell == expected_value);
- }
- }
- void test_unnormalized_mean_generation()
- {
- auto kernel = gil::generate_unnormalized_mean(5);
- for (const auto& cell: kernel)
- {
- BOOST_TEST(cell == 1.0f);
- }
- }
- void test_gaussian_kernel_generation()
- {
- auto kernel = boost::gil::generate_gaussian_kernel(7, 0.84089642);
- const float expected_values[7][7] =
- {
- {0.00000067f, 0.00002292f, 0.00019117f, 0.00038771f, 0.00019117f, 0.00002292f, 0.00000067f},
- {0.00002292f, 0.00078633f, 0.00655965f, 0.01330373f, 0.00655965f, 0.00078633f, 0.00002292f},
- {0.00019117f, 0.00655965f, 0.05472157f, 0.11098164f, 0.05472157f, 0.00655965f, 0.00019117f},
- {0.00038771f, 0.01330373f, 0.11098164f, 0.25508352f, 0.11098164f, 0.01330373f, 0.00038711f},
- {0.00019117f, 0.00655965f, 0.05472157f, 0.11098164f, 0.05472157f, 0.00655965f, 0.00019117f},
- {0.00002292f, 0.00078633f, 0.00655965f, 0.01330373f, 0.00655965f, 0.00078633f, 0.00002292f},
- {0.00000067f, 0.00002292f, 0.00019117f, 0.00038771f, 0.00019117f, 0.00002292f, 0.00000067f}
- };
- for (gil::gray32f_view_t::coord_t y = 0; static_cast<std::size_t>(y) < kernel.size(); ++y)
- {
- for (gil::gray32f_view_t::coord_t x = 0; static_cast<std::size_t>(x) < kernel.size(); ++x)
- {
- auto output = kernel.at(static_cast<std::size_t>(x), static_cast<std::size_t>(y));
- auto expected = expected_values[y][x];
- auto percent_difference = std::ceil(std::abs(expected - output) / expected);
- BOOST_TEST(percent_difference < 5);
- }
- }
- }
- int main()
- {
- test_normalized_mean_generation();
- test_unnormalized_mean_generation();
- test_gaussian_kernel_generation();
- return boost::report_errors();
- }
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