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circular_array_optimization.cpp
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circular_array_optimization.cpp
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// A program to optimize a sparse aperture with free-floating circular
// subapertures.
// Author: Philip Salvaggio
#include "mats.h"
#include "aperture_optimization/acutance_fitness_function.h"
#include "aperture_optimization/annulus_fitness_function.h"
#include "aperture_optimization/golay_fitness_function.h"
#include "aperture_optimization/global_circular_array.h"
#include "aperture_optimization/local_circular_array.h"
#include "aperture_optimization/optimization_main.h"
#include "aperture_optimization/polar_mtf_weighting_fitness_function.h"
#include "optical_designs/compound_aperture_parameters.pb.h"
#include <opencv2/opencv.hpp>
#include <csignal>
#include <cmath>
#include <fstream>
#include <thread>
#include <vector>
#include <gflags/gflags.h>
#include <google/protobuf/text_format.h>
#include <ncurses.h>
DEFINE_int32(subapertures, 6, "Number of subapertures");
DEFINE_int32(population_size, 10, "Population size");
DEFINE_int32(breeds_per_generation, 12, "Number of new apertures to make each "
"generation");
DEFINE_double(fill_factor, 0.18, "Fill Factor");
DEFINE_double(local_stddev, 0.05, "Standard deviation for translating "
"subapertures in local search [fraction of "
"encircled diameter]");
DEFINE_string(base_config, "", "Path to a SimulationConfig file. If specified "
"the aperture_params will be replaced with the "
"result and outputted to best_aperture.txt");
DEFINE_string(fitness_function, "Annulus", "The name of the fitness function");
static const double kEncircledDiameter = 1;
using namespace std;
using namespace mats;
using namespace genetic;
using model_t = CircularArray;
static unique_ptr<GeneticFitnessFunction<model_t>>
fitness_function(nullptr);
static unique_ptr<GeneticSearchStrategy<model_t>>
search_strategy(nullptr);
static bool has_stopped = false;
void stop_iteration(int) {
if (has_stopped) {
std::cout << std::endl;
exit(1);
} else {
if (search_strategy.get()) search_strategy->Stop();
has_stopped = true;
}
}
int main(int argc, char** argv) {
google::ParseCommandLineFlags(&argc, &argv, true);
mats_io::Logging::Init();
signal(SIGINT, stop_iteration);
srand(time(NULL));
// 3*r^2 + 3*(a*r)^2 = FR^2
// r^2 = FR^2/(3 * (a^2 + 1))
const double kSubapRRatio = 1.0;
double little_diameter = kEncircledDiameter * sqrt(FLAGS_fill_factor / (
0.5 * FLAGS_subapertures * (kSubapRRatio * kSubapRRatio + 1)));
double big_diameter = little_diameter * kSubapRRatio;
auto subap_budget = MakeCircularSubapertureBudget(
0.5 * little_diameter, 6);
//0.5 * little_diameter, 3, 0.5 * big_diameter, 3);
string fitness_func_str = strtolower(FLAGS_fitness_function);
if (fitness_func_str == "annulus") {
fitness_function.reset(new AnnulusFitnessFunction<model_t>(
FLAGS_subapertures,
kEncircledDiameter,
subap_budget));
} else if (fitness_func_str == "golay") {
fitness_function.reset(new GolayFitnessFunction<model_t>(
FLAGS_subapertures,
kEncircledDiameter,
subap_budget));
} else if (fitness_func_str == "acutance") {
fitness_function.reset(new AcutanceFitnessFunction<model_t>(
FLAGS_subapertures,
kEncircledDiameter,
0.03333,
subap_budget));
} else if (fitness_func_str == "dog") {
const double kStdDevRatio = 0.5;
const double kPeakFreq = 0.0333;
double stddev = kPeakFreq / (2 * kStdDevRatio) *
sqrt((pow(kStdDevRatio, 2) - 1) / log(kStdDevRatio));
fitness_function.reset(new PolarMtfWeightingFitnessFunction<model_t>(
FLAGS_subapertures,
kEncircledDiameter,
0.1,
subap_budget,
[kStdDevRatio, stddev](double rho, double) {
return exp(-rho * rho / (2 * pow(stddev, 2))) -
exp(-rho * rho / (2 * pow(kStdDevRatio * stddev, 2)));
}));
} else {
cerr << "Unrecognized fitness function: " << FLAGS_fitness_function << endl
<< "Acceptable options are:" << endl
<< " Annulus" << endl
<< " Golay" << endl
<< " Acutance" << endl;
return 1;
}
if (argc < 2) {
search_strategy.reset(new GlobalCircularArray(
FLAGS_subapertures,
kEncircledDiameter,
subap_budget,
0.25,
0.85));
} else {
ifstream ifs(argv[1]);
if (ifs.is_open()) {
model_t best_guess;
ifs >> best_guess;
search_strategy.reset(new LocalCircularArray(
best_guess,
0.75,
FLAGS_local_stddev,
kEncircledDiameter));
} else {
cerr << "File: " << argv[1] << " is not readable." << endl;
exit(1);
}
}
cv::namedWindow("Best MTF", cv::WINDOW_AUTOSIZE);
cv::moveWindow("Best MTF", 600, 0);
cv::namedWindow("Best Mask", cv::WINDOW_AUTOSIZE);
cv::moveWindow("Best Mask", 600, 600);
auto genetic =
genetic::OptimizationMain(*fitness_function,
*search_strategy,
FLAGS_population_size,
FLAGS_breeds_per_generation);
const auto& best_locations = genetic.best_model();
ofstream loc_ofs("locations.txt");
loc_ofs << best_locations;
if (!FLAGS_base_config.empty()) {
string config_file = ResolvePath(FLAGS_base_config);
SimulationConfig sim_config;
DetectorParameters detector_params;
if (!MatsInit(config_file, &sim_config, &detector_params)) return 1;
Simulation ref_sim = sim_config.simulation(0);
sim_config.clear_simulation();
auto* sim = sim_config.add_simulation();
sim->CopyFrom(ref_sim);
Telescope telescope(sim_config, 0, detector_params);
vector<double> wavelength{sim_config.reference_wavelength()}, sw{1};
double q = telescope.EffectiveQ(wavelength, sw);
double f = kEncircledDiameter * detector_params.pixel_pitch() * q /
sim_config.reference_wavelength();
sim->set_name("Optimized Aperture Layout");
sim->set_focal_length(f);
sim->clear_aperture_params();
auto* ap_params = sim->mutable_aperture_params();
ap_params->set_type(ApertureParameters::COMPOUND);
ap_params->set_encircled_diameter(kEncircledDiameter);
ap_params->set_fill_factor(FLAGS_fill_factor);
auto* array_ext = ap_params->MutableExtension(compound_aperture_params);
array_ext->set_combine_operation(CompoundApertureParameters::OR);
for (size_t i = 0; i < best_locations.size(); i++) {
auto* subap = array_ext->add_aperture();
subap->set_type(ApertureParameters::CIRCULAR);
subap->set_encircled_diameter(2 * best_locations[i].r);
subap->set_offset_x(best_locations[i].x);
subap->set_offset_y(best_locations[i].y);
}
string output;
google::protobuf::TextFormat::Printer printer;
printer.PrintToString(sim_config, &output);
ofstream ofs("best_aperture.txt");
ofs << output;
}
ofstream ofs("best_aperture_plot.txt");
ofs << "set parametric" << endl
<< "set xlabel \"X Position [m]\"" << endl
<< "set ylabel \"Y Position [m]\"" << endl
<< "unset key" << endl
<< "set angle degree" << endl
<< "set size square" << endl
<< "set trange [0:360]" << endl
<< "r = " << kEncircledDiameter * 0.5 << endl;
for (size_t i = 0; i < best_locations.size(); i++) {
ofs << "x" << i << " = " << best_locations[i].x << "; y" << i << " = "
<< best_locations[i].y << "; r" << i << " = "
<< best_locations[i].r << endl;
}
ofs << "plot \"-\" u 1:2, r*cos(t), r*sin(t)";
for (size_t i = 0; i < best_locations.size(); i++) {
ofs << ", r" << i << "*cos(t) + x" << i << ", r" << i << "*sin(t) + y" << i;
}
ofs << endl;
for (size_t i = 0; i < best_locations.size(); i++) {
ofs << best_locations[i].x << "\t" << best_locations[i].y << endl;
}
cout << endl;
return 0;
}