#pragma once
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#include <opencv2/opencv.hpp>
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#include <dirent.h>
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#include <fstream>
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static inline cv::Mat preprocess_img(cv::Mat& img, int input_w, int input_h) {
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int w, h, x, y;
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float r_w = input_w / (img.cols*1.0);
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float r_h = input_h / (img.rows*1.0);
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if (r_h > r_w) {
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w = input_w;
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h = r_w * img.rows;
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x = 0;
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y = (input_h - h) / 2;
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} else {
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w = r_h * img.cols;
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h = input_h;
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x = (input_w - w) / 2;
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y = 0;
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}
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cv::Mat re(h, w, CV_8UC3);
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cv::resize(img, re, re.size(), 0, 0, cv::INTER_LINEAR);
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cv::Mat out(input_h, input_w, CV_8UC3, cv::Scalar(128, 128, 128));
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re.copyTo(out(cv::Rect(x, y, re.cols, re.rows)));
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return out;
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}
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static inline int read_files_in_dir(const char *p_dir_name, std::vector<std::string> &file_names) {
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DIR *p_dir = opendir(p_dir_name);
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if (p_dir == nullptr) {
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return -1;
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}
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struct dirent* p_file = nullptr;
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while ((p_file = readdir(p_dir)) != nullptr) {
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if (strcmp(p_file->d_name, ".") != 0 &&
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strcmp(p_file->d_name, "..") != 0) {
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//std::string cur_file_name(p_dir_name);
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//cur_file_name += "/";
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//cur_file_name += p_file->d_name;
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std::string cur_file_name(p_file->d_name);
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file_names.push_back(cur_file_name);
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}
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}
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closedir(p_dir);
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return 0;
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}
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// Function to trim leading and trailing whitespace from a string
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static inline std::string trim_leading_whitespace(const std::string& str) {
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size_t first = str.find_first_not_of(' ');
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if (std::string::npos == first) {
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return str;
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}
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size_t last = str.find_last_not_of(' ');
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return str.substr(first, (last - first + 1));
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}
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// Src: https://stackoverflow.com/questions/16605967
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static inline std::string to_string_with_precision(const float a_value, const int n = 2) {
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std::ostringstream out;
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out.precision(n);
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out << std::fixed << a_value;
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return out.str();
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}
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static inline int read_labels(const std::string labels_filename, std::unordered_map<int, std::string>& labels_map) {
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std::ifstream file(labels_filename);
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// Read each line of the file
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std::string line;
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int index = 0;
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while (std::getline(file, line)) {
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// Strip the line of any leading or trailing whitespace
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line = trim_leading_whitespace(line);
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// Add the stripped line to the labels_map, using the loop index as the key
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labels_map[index] = line;
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index++;
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}
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// Close the file
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file.close();
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return 0;
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}
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