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#include "../../structures/mask2d.h"
#include "../../algorithms/noisestatistics.h"
#include <boost/test/unit_test.hpp>
using algorithms::NoiseStatistics;
BOOST_AUTO_TEST_SUITE(noise_statistics, *boost::unit_test::label("algorithms"))
static void AssertValues(const NoiseStatistics& statistics, long unsigned count,
NoiseStatistics::stat_t sum,
NoiseStatistics::stat_t sum2,
NoiseStatistics::stat_t sum3,
NoiseStatistics::stat_t sum4) {
BOOST_CHECK_EQUAL(statistics.Count(), count);
BOOST_CHECK_CLOSE(statistics.Sum(), sum, 1e-5);
BOOST_CHECK_CLOSE(statistics.Sum2(), sum2, 1e-5);
BOOST_CHECK_CLOSE(statistics.Sum3(), sum3, 1e-5);
BOOST_CHECK_CLOSE(statistics.Sum4(), sum4, 1e-5);
}
static void AssertValues(
const NoiseStatistics& statistics, long unsigned count,
NoiseStatistics::stat_t sum, NoiseStatistics::stat_t sum2,
NoiseStatistics::stat_t sum3, NoiseStatistics::stat_t sum4,
NoiseStatistics::stat_t mean, NoiseStatistics::stat_t moment2,
NoiseStatistics::stat_t moment4, NoiseStatistics::stat_t stdDevEst,
NoiseStatistics::stat_t varianceEst,
NoiseStatistics::stat_t varianceOfVarianceEst) {
AssertValues(statistics, count, sum, sum2, sum3, sum4);
BOOST_CHECK_CLOSE(statistics.Mean(), mean, 1e-5);
BOOST_CHECK_CLOSE(statistics.SecondMoment(), moment2, 1e-5);
BOOST_CHECK_CLOSE(statistics.FourthMoment(), moment4, 1e-5);
BOOST_CHECK_CLOSE(statistics.StdDevEstimator(), stdDevEst, 1e-5);
BOOST_CHECK_CLOSE(statistics.VarianceEstimator(), varianceEst, 1e-5);
BOOST_CHECK_CLOSE(statistics.VarianceOfVarianceEstimator(),
varianceOfVarianceEst, 1e-5);
}
static void AssertRunnable(const NoiseStatistics& statistics) {
statistics.Count();
statistics.Sum();
statistics.Sum2();
statistics.Sum3();
statistics.Sum4();
statistics.Mean();
statistics.SecondMoment();
statistics.FourthMoment();
statistics.StdDevEstimator();
statistics.VarianceEstimator();
statistics.VarianceOfVarianceEstimator();
}
BOOST_AUTO_TEST_CASE(initialization) {
// Test without initialization
NoiseStatistics statistics;
AssertValues(statistics, 0, 0.0, 0.0, 0.0, 0.0);
// Some values are undefined, but should not throw an exception:
AssertRunnable(statistics);
// Test assignment + initialization with an array
NoiseStatistics::Array array;
array.push_back(1.0);
statistics = NoiseStatistics(array);
AssertValues(statistics, 1, 1.0, 1.0, 1.0, 1.0);
AssertRunnable(statistics);
// Test copy constructor
NoiseStatistics copy(statistics);
AssertValues(copy, 1, 1.0, 1.0, 1.0, 1.0);
AssertRunnable(copy);
}
BOOST_AUTO_TEST_CASE(calculations) {
NoiseStatistics::Array array;
array.push_back(1.0);
array.push_back(2.0);
array.push_back(3.0);
NoiseStatistics statistics(array);
AssertValues(statistics, 3, 6.0, 14.0, 36.0, 98.0);
BOOST_CHECK_CLOSE(statistics.Mean(), 2.0, 1e-6);
BOOST_CHECK_CLOSE(statistics.SecondMoment(), 2.0 / 3.0, 1e-6);
BOOST_CHECK_CLOSE(statistics.FourthMoment(), 2.0 / 3.0, 1e-6);
BOOST_CHECK_CLOSE(statistics.StdDevEstimator(), 1.0, 1e-6);
BOOST_CHECK_CLOSE(statistics.VarianceEstimator(), 1.0, 1e-6);
AssertRunnable(statistics);
array.clear();
array.push_back(5.0);
array.push_back(5.0);
array.push_back(5.0);
array.push_back(5.0);
array.push_back(5.0);
statistics = NoiseStatistics(array);
AssertValues(statistics, 5, 25.0, 125.0, 625.0, 3125.0, 5.0, 0.0, 0.0, 0.0,
0.0, 0.0);
array.clear();
array.push_back(1.0);
array.push_back(1.0);
array.push_back(1.0);
array.push_back(2.0);
array.push_back(3.0);
statistics = NoiseStatistics(array);
AssertValues(statistics, 5, 8.0, 16.0, 38.0, 100.0, 1.6, 0.64, 0.8512,
sqrt(0.8), 0.8, 0.12928);
array.clear();
array.push_back(3.0);
array.push_back(1.0);
array.push_back(3.0);
array.push_back(1.0);
array.push_back(3.0);
array.push_back(1.0);
statistics = NoiseStatistics(array);
AssertValues(statistics, 6, 12.0, 30.0, 84.0, 246.0, 2.0, 1.0, 1.0, sqrt(1.2),
1.2, 2.0 / 30.0);
}
BOOST_AUTO_TEST_CASE(add_values) {
NoiseStatistics statistics;
NoiseStatistics::Array array;
array.push_back(1.0);
array.push_back(2.0);
array.push_back(3.0);
statistics.Add(array);
AssertValues(statistics, 3, 6.0, 14.0, 36.0, 98.0);
BOOST_CHECK_CLOSE(statistics.Mean(), 2.0, 1e-5);
BOOST_CHECK_CLOSE(statistics.SecondMoment(), 2.0 / 3.0, 1e-5);
BOOST_CHECK_CLOSE(statistics.FourthMoment(), 2.0 / 3.0, 1e-5);
BOOST_CHECK_CLOSE(statistics.VarianceEstimator(), 1.0, 1e-5);
AssertRunnable(statistics);
array.clear();
array.push_back(1.0);
array.push_back(1.0);
statistics.Add(array);
AssertValues(statistics, 5, 8.0, 16.0, 38.0, 100.0, 1.6, 0.64, 0.8512,
sqrt(0.8), 0.8, 0.12928);
array.clear();
array.push_back(5.0);
NoiseStatistics numberFive = NoiseStatistics(array);
statistics = NoiseStatistics();
statistics.Add(numberFive);
statistics.Add(numberFive);
statistics.Add(numberFive);
statistics.Add(numberFive);
statistics.Add(numberFive);
AssertValues(statistics, 5, 25.0, 125.0, 625.0, 3125.0, 5.0, 0.0, 0.0, 0.0,
0.0, 0.0);
array.clear();
array.push_back(3.0);
array.push_back(3.0);
array.push_back(3.0);
NoiseStatistics partA = NoiseStatistics(array);
array.clear();
array.push_back(1.0);
array.push_back(1.0);
array.push_back(1.0);
NoiseStatistics partB = NoiseStatistics(array);
statistics = NoiseStatistics();
statistics.Add(partA);
statistics.Add(partB);
AssertValues(statistics, 6, 12.0, 30.0, 84.0, 246.0, 2.0, 1.0, 1.0, sqrt(1.2),
1.2, 2.0 / 30.0);
}
BOOST_AUTO_TEST_SUITE_END()
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