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// SPDX-License-Identifier: LGPL-3.0-only
#include <boost/test/unit_test.hpp>
#include <aocommon/logger.h>
#include "math/rms_image.h"
namespace radler::math {
BOOST_AUTO_TEST_SUITE(rms_image)
BOOST_AUTO_TEST_CASE(make_rms_factor_image) {
aocommon::Logger::SetVerbosity(aocommon::LogVerbosityLevel::kQuiet);
const aocommon::Image input(1, 3, {4.0, 16.0, 9.0});
aocommon::Image test_data(input);
MakeRmsFactorImage(test_data, 0.0);
BOOST_CHECK_CLOSE_FRACTION(test_data[0], 1.0, 1e-6);
BOOST_CHECK_CLOSE_FRACTION(test_data[1], 1.0, 1e-6);
BOOST_CHECK_CLOSE_FRACTION(test_data[2], 1.0, 1e-6);
test_data = input;
MakeRmsFactorImage(test_data, 1.0);
BOOST_CHECK_CLOSE_FRACTION(test_data[0], 1.0, 1e-6);
BOOST_CHECK_CLOSE_FRACTION(test_data[1], 0.25, 1e-6);
BOOST_CHECK_CLOSE_FRACTION(test_data[2], 4.0 / 9.0, 1e-6);
test_data = input;
MakeRmsFactorImage(test_data, 0.5);
BOOST_CHECK_CLOSE_FRACTION(test_data[0], 1.0, 1e-6);
BOOST_CHECK_CLOSE_FRACTION(test_data[1], 0.5, 1e-6);
BOOST_CHECK_CLOSE_FRACTION(test_data[2], 2.0 / 3.0, 1e-6);
// Special case: data contains a zero.
test_data = aocommon::Image(1, 3, {0.0, 1.0, 16.0});
MakeRmsFactorImage(test_data, 0.0);
BOOST_CHECK_CLOSE_FRACTION(test_data[0], 1.0, 1e-6);
BOOST_CHECK_CLOSE_FRACTION(test_data[1], 1.0, 1e-6);
BOOST_CHECK_CLOSE_FRACTION(test_data[2], 1.0, 1e-6);
// Even more special: data contains a zero while RMS correction is still
// requested. A zero local mean implies that there is a large part of the
// image without any noise in it: this suggests something went really
// wrong. Because there is no way to normalize such an image, zeros
// are returned, which in turn will cause no deconvolution to occur.
test_data = aocommon::Image(1, 3, {0.0, 1.0, 16.0});
MakeRmsFactorImage(test_data, 1.0);
BOOST_CHECK_CLOSE_FRACTION(test_data[0], 0.0, 1e-6);
BOOST_CHECK_CLOSE_FRACTION(test_data[1], 0.0, 1e-6);
BOOST_CHECK_CLOSE_FRACTION(test_data[2], 0.0, 1e-6);
}
BOOST_AUTO_TEST_SUITE_END()
} // namespace radler::math
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