utils.hpp

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#pragma once
 
#include <opencv2/core/mat.hpp>
#include <opencv2/core/types.hpp>
 
static inline cv::Point2d pointPixelToRoiNormalized(const cv::Point2d& pixel_point,
                                                    const cv::Rect2d& roi) {
    const double x_norm = (pixel_point.x - roi.x) / roi.width;
    const double y_norm = (pixel_point.y - roi.y) / roi.height;
    return cv::Point2d(x_norm, y_norm);
}
 
static inline cv::Point2d sizePixelToRoiNormalized(const cv::Size& size, const cv::Rect& roi) {
    const double width_norm = static_cast<double>(size.width) / roi.width;
    const double height_norm = static_cast<double>(size.height) / roi.height;
    return cv::Point2d(width_norm, height_norm);
}
 
static inline cv::Point pointRoiNormalizedToPixel(const cv::Point2d& normalized_point,
                                                  const cv::Rect& roi) {
    const int x_pixel = static_cast<int>(std::round(normalized_point.x * roi.width + roi.x));
    const int y_pixel = static_cast<int>(std::round(normalized_point.y * roi.height + roi.y));
 
    return cv::Point(x_pixel, y_pixel);
}
 
static inline cv::Size sizeRoiNormalizedToPixel(const cv::Size2d& size, const cv::Rect& roi) {
    const int width_pixel = static_cast<int>(size.width * roi.width);
    const int height_pixel = static_cast<int>(size.height * roi.height);
    return cv::Size(width_pixel, height_pixel);
}