utils.hpp

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// SPDX-FileCopyrightText: 2025 Povl Filip Sonne-Frederiksen
//
// SPDX-License-Identifier: GPL-3.0-or-later
 
#pragma once
#include <torch/torch.h>
 
#include <opencv2/core/mat.hpp>
#include <opencv2/core/types.hpp>
 
namespace ReUseX::vision {
float generate_scale(cv::Mat &image, const cv::Size &target_size,
                     bool scale_up = false);
float letterbox(cv::Mat &input_image, cv::Mat &output_image,
                const cv::Size &target_size);
float cropbox(cv::Mat &input_image, cv::Mat &output_image,
              const cv::Size &target_size);
 
torch::Tensor xyxy_to_xywh(const torch::Tensor &x);
torch::Tensor xywh_to_xyxy(const torch::Tensor &x);
torch::Tensor nms(const torch::Tensor &bboxes, const torch::Tensor &scores,
                  float iou_threshold = 0.45);
 
torch::Tensor non_max_suppression(torch::Tensor &predictions,
                                  float confThreshold = 0.25,
                                  float iouThreshold = 0.45,
                                  int maxDetections = 300);
 
// Deprecated aliases for backward compatibility
[[deprecated("Use xyxy_to_xywh instead")]] inline torch::Tensor
xyxy2xywh(const torch::Tensor &x) {
  return xyxy_to_xywh(x);
}
[[deprecated("Use xywh_to_xyxy instead")]] inline torch::Tensor
xywh2xyxy(const torch::Tensor &x) {
  return xywh_to_xyxy(x);
}
} // namespace ReUseX::vision