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+#include <stdio.h>
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+#include <string.h>
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+#include <sstream>
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+#include <iostream>
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+#include <fstream>
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+#include <vector>
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+#include <tuple>
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+#include <cmath>
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+#include <numeric>
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+#include <map>
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+#include <algorithm>
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+#include <filesystem>
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+#include <unistd.h>
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+
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+#include <bits/stdc++.h>
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+#include <iostream>
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+#include <sys/stat.h>
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+#include <sys/types.h>
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+
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+#include "rawls.h"
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+
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+struct Point {
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+ unsigned x;
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+ unsigned y;
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+};
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+
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+struct Tile {
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+ Point p1;
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+ Point p2;
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+};
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+
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+std::vector<std::string> split(const std::string& s, char delimiter)
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+{
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+ std::vector<std::string> tokens;
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+ std::string token;
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+ std::istringstream tokenStream(s);
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+ while (std::getline(tokenStream, token, delimiter))
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+ {
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+ tokens.push_back(token);
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+ }
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+ return tokens;
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+}
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+
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+void writeProgress(float progress, bool moveUp = false){
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+ int barWidth = 200;
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+
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+ if (moveUp){
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+ // move up line
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+ std::cout << "\e[A";
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+ std::cout.flush();
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+ }
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+
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+ std::cout << "[";
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+ int pos = barWidth * progress;
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+ for (int i = 0; i < barWidth; ++i) {
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+ if (i < pos) std::cout << "=";
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+ else if (i == pos) std::cout << ">";
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+ else std::cout << " ";
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+ }
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+ std::cout << "] " << int(progress * 100.0) << " %\r";
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+ std::cout.flush();
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+}
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+
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+float getEstimator(std::string estimator, std::vector<float> values) {
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+
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+ if (estimator == "median") {
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+
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+ std::sort(values.begin(), values.end());
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+
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+ unsigned size = values.size();
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+
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+ if (size % 2 == 0)
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+ {
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+ return (values[size / 2 - 1] + values[size / 2]) / 2;
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+ }
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+ else
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+ {
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+ return values[size / 2];
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+ }
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+ } else if (estimator == "mean") {
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+
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+ return std::accumulate(values.begin(), values.end(), 0.0) / values.size();
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+
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+ } else if (estimator == "var") {
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+ // Calculate the mean
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+ const float mean = std::accumulate(values.begin(), values.end(), 0.0) / values.size();
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+
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+ // Now calculate the variance
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+ auto variance_func = [&mean](float accumulator, const float& val) {
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+ return accumulator + pow(val - mean, 2);
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+ };
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+
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+ return std::accumulate(values.begin(), values.end(), 0.0, variance_func) / values.size();
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+
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+ } else if (estimator == "std") {
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+
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+ return sqrt(getEstimator("var", values));
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+
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+ } else if (estimator == "skewness") {
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+
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+ unsigned size = values.size();
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+
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+ float mean = getEstimator("mean", values);
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+ float std = getEstimator("std", values);
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+
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+ // Now calculate the sum of pow 3
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+ auto order3_func = [&mean, &std](float accumulator, const float& val) {
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+ return accumulator + pow((val - mean) / std, 3);
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+ };
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+
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+ float order3 = std::accumulate(values.begin(), values.end(), 0.0, order3_func);
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+
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+ return order3 / size;
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+
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+ } else if (estimator == "kurtosis") {
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+
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+ unsigned size = values.size();
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+
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+ float mean = getEstimator("mean", values);
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+ float std = getEstimator("std", values);
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+
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+ // Now calculate the sum of pow 4
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+ auto order4_func = [&mean, &std](float accumulator, const float& val) {
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+ return accumulator + pow((val - mean) / std, 4);
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+ };
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+
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+ float order4 = std::accumulate(values.begin(), values.end(), 0.0, order4_func);
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+
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+ return order4 / size;
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+
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+ } else if (estimator == "mode") {
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+
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+ std::vector<float> pvalues;
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+
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+ for (unsigned i = 0; i < values.size(); i++){
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+ pvalues.push_back(roundf(values.at(i) * 100) / 100.0);
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+ }
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+
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+ typedef std::map<float,unsigned int> CounterMap;
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+ CounterMap counts;
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+ for (int i = 0; i < pvalues.size(); ++i)
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+ {
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+ CounterMap::iterator it(counts.find(pvalues[i]));
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+ if (it != counts.end()){
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+ it->second++;
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+ } else {
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+ counts[pvalues[i]] = 1;
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+ }
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+ }
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+
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+ // Create a map iterator and point to beginning of map
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+ std::map<float, unsigned int>::iterator it = counts.begin();
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+ unsigned noccurences = 0;
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+ float modeValue = 0.;
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+ // Iterate over the map using Iterator till end.
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+ while (it != counts.end())
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+ {
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+ // Accessing KEY from element pointed by it.
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+ float potentialMode = it->first;
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+ // Accessing VALUE from element pointed by it.
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+ unsigned count = it->second;
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+
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+ if (count > noccurences) {
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+ noccurences = count;
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+ modeValue = potentialMode;
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+ }
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+
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+ // Increment the Iterator to point to next entry
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+ it++;
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+ }
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+
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+ return modeValue;
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+ }
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+
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+ // by default
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+ return 0.;
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+}
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+
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+int main(int argc, char *argv[]){
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+
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+ std::string folderName;
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+ std::vector<std::string> estimators = {"median", "var", "std", "skewness", "kurtosis", "mode"};
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+ unsigned blockHeight;
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+ unsigned blockWidth;
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+ unsigned nfiles = 10000;
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+ std::string outputFolder;
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+
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+ for (int i = 1; i < argc; ++i) {
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+ if (!strcmp(argv[i], "--folder") || !strcmp(argv[i], "-folder")) {
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+ folderName = argv[++i];
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+ } else if (!strcmp(argv[i], "--bwidth") || !strcmp(argv[i], "-bwidth")) {
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+ blockHeight = atoi(argv[++i]);
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+ } else if (!strcmp(argv[i], "--bheight") || !strcmp(argv[i], "-bheight")) {
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+ blockWidth = atoi(argv[++i]);
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+ } else if (!strcmp(argv[i], "--output") || !strcmp(argv[i], "-output")) {
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+ outputFolder = argv[++i];
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+ } else if (!strcmp(argv[i], "--nfiles") || !strcmp(argv[i], "-nfiles")) {
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+ nfiles = atoi(argv[++i]);
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+ }
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+ }
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+
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+ // create outputs directory
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+ mkdir(outputFolder.c_str(), 0755);
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+
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+ auto elements = split(folderName, '/');
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+ std::string sceneName = elements.at(elements.size() - 1);
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+
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+ for (int i = 0; i < estimators.size(); i++) {
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+
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+ mkdir((outputFolder + "/" + estimators[i]).c_str(), 0755);
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+ mkdir((outputFolder + "/" + estimators[i] + "/" + sceneName).c_str(), 0755);
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+ }
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+
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+
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+ // get all files path
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+ std::vector<std::string> imagesPath;
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+
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+ for (const auto & entry : std::filesystem::directory_iterator(folderName)){
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+ std::string imageName = entry.path().string();
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+ if (rawls::HasExtension(imageName, ".rawls") || rawls::HasExtension(imageName, ".rawls_20")){
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+ imagesPath.push_back(imageName);
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+ }
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+ }
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+
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+ if (imagesPath.size() != nfiles) {
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+ return 0;
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+ }
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+
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+ std::sort(imagesPath.begin(), imagesPath.end());
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+
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+ std::tuple<unsigned, unsigned, unsigned> data = rawls::getDimensionsRAWLS(imagesPath.at(0));
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+
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+ unsigned outputWidth = std::get<0>(data);
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+ unsigned outputHeight = std::get<1>(data);
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+ unsigned nbChanels = std::get<2>(data);
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+
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+ std::vector<float*> outputBuffers;
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+ std::vector<std::string> outputFiles;
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+ std::vector<std::string> selectedEstimators;
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+ // new buffer size as new output buffer image (default 3 channels)
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+
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+ for (int i = 0; i < estimators.size(); i++) {
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+
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+ std::string outputFile = outputFolder + "/" + estimators[i] + "/" + sceneName + "/" + sceneName + ".rawls";
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+
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+ std::ifstream ifile;
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+ ifile.open(outputFile);
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+ if(!ifile) {
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+
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+ // create new buffer entry
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+ selectedEstimators.push_back(estimators[i]);
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+ outputFiles.push_back(outputFile);
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+ outputBuffers.push_back(new float[outputHeight * outputWidth * nbChanels]);
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+
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+ } else {
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+ ifile.close();
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+ }
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+ }
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+
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+ // get all tiles to apply
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+ unsigned nWidth = ceil(outputWidth / (float)blockWidth);
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+ unsigned nHeight = ceil(outputHeight / (float)blockHeight);
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+
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+ std::vector<Tile> tiles;
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+
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+ for (unsigned i = 0; i < nWidth; i++) {
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+ for (unsigned j = 0; j < nHeight; j++) {
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+
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+ unsigned x1 = i * blockWidth;
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+ unsigned y1 = j * blockHeight;
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+
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+ unsigned x2 = i * blockWidth + blockWidth;
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+ unsigned y2 = j * blockHeight + blockHeight;
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+
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+ x2 = x2 > outputWidth ? outputWidth: x2;
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+ y2 = y2 > outputHeight ? outputHeight: y2;
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+
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+ Point p1 = {x1, y1};
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+ Point p2 = {x2, y2};
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+
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+ Tile tile = {p1, p2};
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+ tiles.push_back(tile);
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+ }
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+ }
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+
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+ unsigned nsamples = imagesPath.size();
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+ unsigned nloop = tiles.size() * nsamples;
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+ unsigned nloopCounter = 0;
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+
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+ for (unsigned t_index = 0; t_index < tiles.size(); t_index++){
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+
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+ Tile tile = tiles.at(t_index);
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+
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+ //std::cout << "Tile: (" << tile.p1.x << ", " << tile.p1.y << ")" << " => " << "(" << tile.p2.x << ", " << tile.p2.y << ")" << std::endl;
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+
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+ unsigned nvalues = (tile.p2.x - tile.p1.x) * (tile.p2.y - tile.p1.y) * 3;
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+
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+ std::vector<std::vector<float>> rgbValues(nvalues);
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+
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+ for (unsigned i = 0; i < nsamples; i++) {
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+
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+ try {
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+
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+ float* RGBpixels = rawls::getPixelsRAWLS(imagesPath.at(i));
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+
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+ unsigned index = 0;
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+ for (int y = tile.p1.y; y < tile.p2.y; ++y) {
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+ for (int x = tile.p1.x; x < tile.p2.x; ++x) {
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+
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+ rgbValues.at(index).push_back(RGBpixels[3 * (y * outputWidth + x) + 0]);
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+ rgbValues.at(index + 1).push_back(RGBpixels[3 * (y * outputWidth + x) + 1]);
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+ rgbValues.at(index + 2).push_back(RGBpixels[3 * (y * outputWidth + x) + 2]);
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+
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+ index += 3;
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+
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+ }
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+ }
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+
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+ delete RGBpixels;
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+
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+ } catch(std::exception& e){
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+ std::cout << "Error occurs when reading file" << std::endl;
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+ }
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+
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+ // display progress
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+ nloopCounter += 1;
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+ writeProgress(nloopCounter / (float)nloop);
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+ }
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+
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+
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+ for (int i = 0; i < outputFiles.size(); i++) {
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+
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+ // extract stat and add predicted value into output buffer
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+ unsigned index = 0;
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+
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+ for (int y = tile.p1.y; y < tile.p2.y; ++y) {
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+ for (int x = tile.p1.x; x < tile.p2.x; ++x) {
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+
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+ outputBuffers.at(i)[3 * (y * outputWidth + x) + 0] = getEstimator(selectedEstimators.at(i), rgbValues.at(index + 0));
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+ outputBuffers.at(i)[3 * (y * outputWidth + x) + 1] = getEstimator(selectedEstimators.at(i), rgbValues.at(index + 1));
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+ outputBuffers.at(i)[3 * (y * outputWidth + x) + 2] = getEstimator(selectedEstimators.at(i), rgbValues.at(index + 2));
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+
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+ index += 3;
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+ }
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+ }
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+ }
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+ }
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+
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+ // Save here new rawls image
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+ std::string comments = rawls::getCommentsRAWLS(imagesPath.at(0));
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+
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+ for (int i = 0; i < outputFiles.size(); i++) {
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+
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+ // construct specific outfile name
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+ bool success = rawls::saveAsRAWLS(outputWidth, outputHeight, nbChanels, comments, outputBuffers[i], outputFiles[i]);
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+
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+ if (success) {
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+ std::cout << "New image saved into " << outputFiles[i] << std::endl;
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+ }
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+ else
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+ {
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+ std::cout << "Error while saving current image " << outputFiles[i] << std::endl;
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+ }
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+
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+ delete outputBuffers[i];
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+ }
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+
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+}
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